clang 8.0.0

SemaChecking.cpp
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1 //===- SemaChecking.cpp - Extra Semantic Checking -------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements extra semantic analysis beyond what is enforced
11 // by the C type system.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "clang/AST/APValue.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/Attr.h"
18 #include "clang/AST/AttrIterator.h"
19 #include "clang/AST/CharUnits.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclBase.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclObjC.h"
24 #include "clang/AST/DeclarationName.h"
25 #include "clang/AST/EvaluatedExprVisitor.h"
26 #include "clang/AST/Expr.h"
27 #include "clang/AST/ExprCXX.h"
28 #include "clang/AST/ExprObjC.h"
29 #include "clang/AST/ExprOpenMP.h"
30 #include "clang/AST/FormatString.h"
31 #include "clang/AST/NSAPI.h"
32 #include "clang/AST/NonTrivialTypeVisitor.h"
33 #include "clang/AST/OperationKinds.h"
34 #include "clang/AST/Stmt.h"
35 #include "clang/AST/TemplateBase.h"
36 #include "clang/AST/Type.h"
37 #include "clang/AST/TypeLoc.h"
38 #include "clang/AST/UnresolvedSet.h"
39 #include "clang/Basic/AddressSpaces.h"
40 #include "clang/Basic/CharInfo.h"
41 #include "clang/Basic/Diagnostic.h"
42 #include "clang/Basic/IdentifierTable.h"
43 #include "clang/Basic/LLVM.h"
44 #include "clang/Basic/LangOptions.h"
45 #include "clang/Basic/OpenCLOptions.h"
46 #include "clang/Basic/OperatorKinds.h"
47 #include "clang/Basic/PartialDiagnostic.h"
48 #include "clang/Basic/SourceLocation.h"
49 #include "clang/Basic/SourceManager.h"
50 #include "clang/Basic/Specifiers.h"
51 #include "clang/Basic/SyncScope.h"
52 #include "clang/Basic/TargetBuiltins.h"
53 #include "clang/Basic/TargetCXXABI.h"
54 #include "clang/Basic/TargetInfo.h"
55 #include "clang/Basic/TypeTraits.h"
56 #include "clang/Lex/Lexer.h" // TODO: Extract static functions to fix layering.
57 #include "clang/Sema/Initialization.h"
58 #include "clang/Sema/Lookup.h"
59 #include "clang/Sema/Ownership.h"
60 #include "clang/Sema/Scope.h"
61 #include "clang/Sema/ScopeInfo.h"
62 #include "clang/Sema/Sema.h"
63 #include "clang/Sema/SemaInternal.h"
64 #include "llvm/ADT/APFloat.h"
65 #include "llvm/ADT/APInt.h"
66 #include "llvm/ADT/APSInt.h"
67 #include "llvm/ADT/ArrayRef.h"
68 #include "llvm/ADT/DenseMap.h"
69 #include "llvm/ADT/FoldingSet.h"
70 #include "llvm/ADT/None.h"
71 #include "llvm/ADT/Optional.h"
72 #include "llvm/ADT/STLExtras.h"
73 #include "llvm/ADT/SmallBitVector.h"
74 #include "llvm/ADT/SmallPtrSet.h"
75 #include "llvm/ADT/SmallString.h"
76 #include "llvm/ADT/SmallVector.h"
77 #include "llvm/ADT/StringRef.h"
78 #include "llvm/ADT/StringSwitch.h"
79 #include "llvm/ADT/Triple.h"
80 #include "llvm/Support/AtomicOrdering.h"
81 #include "llvm/Support/Casting.h"
82 #include "llvm/Support/Compiler.h"
83 #include "llvm/Support/ConvertUTF.h"
84 #include "llvm/Support/ErrorHandling.h"
85 #include "llvm/Support/Format.h"
86 #include "llvm/Support/Locale.h"
87 #include "llvm/Support/MathExtras.h"
88 #include "llvm/Support/raw_ostream.h"
89 #include <algorithm>
90 #include <cassert>
91 #include <cstddef>
92 #include <cstdint>
93 #include <functional>
94 #include <limits>
95 #include <string>
96 #include <tuple>
97 #include <utility>
98
99 using namespace clang;
100 using namespace sema;
101
102 SourceLocation Sema::getLocationOfStringLiteralByte(const StringLiteral *SL,
103 unsigned ByteNo) const {
104 return SL->getLocationOfByte(ByteNo, getSourceManager(), LangOpts,
105 Context.getTargetInfo());
106 }
107
108 /// Checks that a call expression's argument count is the desired number.
109 /// This is useful when doing custom type-checking. Returns true on error.
110 static bool checkArgCount(Sema &S, CallExpr *call, unsigned desiredArgCount) {
111 unsigned argCount = call->getNumArgs();
112 if (argCount == desiredArgCount) return false;
113
114 if (argCount < desiredArgCount)
115 return S.Diag(call->getEndLoc(), diag::err_typecheck_call_too_few_args)
116 << 0 /*function call*/ << desiredArgCount << argCount
117 << call->getSourceRange();
118
119 // Highlight all the excess arguments.
120 SourceRange range(call->getArg(desiredArgCount)->getBeginLoc(),
121 call->getArg(argCount - 1)->getEndLoc());
122
123 return S.Diag(range.getBegin(), diag::err_typecheck_call_too_many_args)
124 << 0 /*function call*/ << desiredArgCount << argCount
125 << call->getArg(1)->getSourceRange();
126 }
127
128 /// Check that the first argument to __builtin_annotation is an integer
129 /// and the second argument is a non-wide string literal.
130 static bool SemaBuiltinAnnotation(Sema &S, CallExpr *TheCall) {
131 if (checkArgCount(S, TheCall, 2))
132 return true;
133
134 // First argument should be an integer.
135 Expr *ValArg = TheCall->getArg(0);
136 QualType Ty = ValArg->getType();
137 if (!Ty->isIntegerType()) {
138 S.Diag(ValArg->getBeginLoc(), diag::err_builtin_annotation_first_arg)
139 << ValArg->getSourceRange();
140 return true;
141 }
142
143 // Second argument should be a constant string.
144 Expr *StrArg = TheCall->getArg(1)->IgnoreParenCasts();
145 StringLiteral *Literal = dyn_cast<StringLiteral>(StrArg);
146 if (!Literal || !Literal->isAscii()) {
147 S.Diag(StrArg->getBeginLoc(), diag::err_builtin_annotation_second_arg)
148 << StrArg->getSourceRange();
149 return true;
150 }
151
152 TheCall->setType(Ty);
153 return false;
154 }
155
156 static bool SemaBuiltinMSVCAnnotation(Sema &S, CallExpr *TheCall) {
157 // We need at least one argument.
158 if (TheCall->getNumArgs() < 1) {
159 S.Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
160 << 0 << 1 << TheCall->getNumArgs()
161 << TheCall->getCallee()->getSourceRange();
162 return true;
163 }
164
165 // All arguments should be wide string literals.
166 for (Expr *Arg : TheCall->arguments()) {
167 auto *Literal = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts());
168 if (!Literal || !Literal->isWide()) {
169 S.Diag(Arg->getBeginLoc(), diag::err_msvc_annotation_wide_str)
170 << Arg->getSourceRange();
171 return true;
172 }
173 }
174
175 return false;
176 }
177
178 /// Check that the argument to __builtin_addressof is a glvalue, and set the
179 /// result type to the corresponding pointer type.
180 static bool SemaBuiltinAddressof(Sema &S, CallExpr *TheCall) {
181 if (checkArgCount(S, TheCall, 1))
182 return true;
183
184 ExprResult Arg(TheCall->getArg(0));
185 QualType ResultType = S.CheckAddressOfOperand(Arg, TheCall->getBeginLoc());
186 if (ResultType.isNull())
187 return true;
188
189 TheCall->setArg(0, Arg.get());
190 TheCall->setType(ResultType);
191 return false;
192 }
193
194 static bool SemaBuiltinOverflow(Sema &S, CallExpr *TheCall) {
195 if (checkArgCount(S, TheCall, 3))
196 return true;
197
198 // First two arguments should be integers.
199 for (unsigned I = 0; I < 2; ++I) {
200 ExprResult Arg = TheCall->getArg(I);
201 QualType Ty = Arg.get()->getType();
202 if (!Ty->isIntegerType()) {
203 S.Diag(Arg.get()->getBeginLoc(), diag::err_overflow_builtin_must_be_int)
204 << Ty << Arg.get()->getSourceRange();
205 return true;
206 }
207 InitializedEntity Entity = InitializedEntity::InitializeParameter(
208 S.getASTContext(), Ty, /*consume*/ false);
209 Arg = S.PerformCopyInitialization(Entity, SourceLocation(), Arg);
210 if (Arg.isInvalid())
211 return true;
212 TheCall->setArg(I, Arg.get());
213 }
214
215 // Third argument should be a pointer to a non-const integer.
216 // IRGen correctly handles volatile, restrict, and address spaces, and
217 // the other qualifiers aren't possible.
218 {
219 ExprResult Arg = TheCall->getArg(2);
220 QualType Ty = Arg.get()->getType();
221 const auto *PtrTy = Ty->getAs<PointerType>();
222 if (!(PtrTy && PtrTy->getPointeeType()->isIntegerType() &&
223 !PtrTy->getPointeeType().isConstQualified())) {
224 S.Diag(Arg.get()->getBeginLoc(),
225 diag::err_overflow_builtin_must_be_ptr_int)
226 << Ty << Arg.get()->getSourceRange();
227 return true;
228 }
229 InitializedEntity Entity = InitializedEntity::InitializeParameter(
230 S.getASTContext(), Ty, /*consume*/ false);
231 Arg = S.PerformCopyInitialization(Entity, SourceLocation(), Arg);
232 if (Arg.isInvalid())
233 return true;
234 TheCall->setArg(2, Arg.get());
235 }
236 return false;
237 }
238
239 static void SemaBuiltinMemChkCall(Sema &S, FunctionDecl *FDecl,
240 CallExpr *TheCall, unsigned SizeIdx,
241 unsigned DstSizeIdx,
242 StringRef LikelyMacroName) {
243 if (TheCall->getNumArgs() <= SizeIdx ||
244 TheCall->getNumArgs() <= DstSizeIdx)
245 return;
246
247 const Expr *SizeArg = TheCall->getArg(SizeIdx);
248 const Expr *DstSizeArg = TheCall->getArg(DstSizeIdx);
249
250 Expr::EvalResult SizeResult, DstSizeResult;
251
252 // find out if both sizes are known at compile time
253 if (!SizeArg->EvaluateAsInt(SizeResult, S.Context) ||
254 !DstSizeArg->EvaluateAsInt(DstSizeResult, S.Context))
255 return;
256
257 llvm::APSInt Size = SizeResult.Val.getInt();
258 llvm::APSInt DstSize = DstSizeResult.Val.getInt();
259
260 if (Size.ule(DstSize))
261 return;
262
263 // Confirmed overflow, so generate the diagnostic.
264 StringRef FunctionName = FDecl->getName();
265 SourceLocation SL = TheCall->getBeginLoc();
266 SourceManager &SM = S.getSourceManager();
267 // If we're in an expansion of a macro whose name corresponds to this builtin,
268 // use the simple macro name and location.
269 if (SL.isMacroID() && Lexer::getImmediateMacroName(SL, SM, S.getLangOpts()) ==
270 LikelyMacroName) {
271 FunctionName = LikelyMacroName;
272 SL = SM.getImmediateMacroCallerLoc(SL);
273 }
274
275 S.Diag(SL, diag::warn_memcpy_chk_overflow)
276 << FunctionName << DstSize.toString(/*Radix=*/10)
277 << Size.toString(/*Radix=*/10);
278 }
279
280 static bool SemaBuiltinCallWithStaticChain(Sema &S, CallExpr *BuiltinCall) {
281 if (checkArgCount(S, BuiltinCall, 2))
282 return true;
283
284 SourceLocation BuiltinLoc = BuiltinCall->getBeginLoc();
285 Expr *Builtin = BuiltinCall->getCallee()->IgnoreImpCasts();
286 Expr *Call = BuiltinCall->getArg(0);
287 Expr *Chain = BuiltinCall->getArg(1);
288
289 if (Call->getStmtClass() != Stmt::CallExprClass) {
290 S.Diag(BuiltinLoc, diag::err_first_argument_to_cwsc_not_call)
291 << Call->getSourceRange();
292 return true;
293 }
294
295 auto CE = cast<CallExpr>(Call);
296 if (CE->getCallee()->getType()->isBlockPointerType()) {
297 S.Diag(BuiltinLoc, diag::err_first_argument_to_cwsc_block_call)
298 << Call->getSourceRange();
299 return true;
300 }
301
302 const Decl *TargetDecl = CE->getCalleeDecl();
303 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl))
304 if (FD->getBuiltinID()) {
305 S.Diag(BuiltinLoc, diag::err_first_argument_to_cwsc_builtin_call)
306 << Call->getSourceRange();
307 return true;
308 }
309
310 if (isa<CXXPseudoDestructorExpr>(CE->getCallee()->IgnoreParens())) {
311 S.Diag(BuiltinLoc, diag::err_first_argument_to_cwsc_pdtor_call)
312 << Call->getSourceRange();
313 return true;
314 }
315
316 ExprResult ChainResult = S.UsualUnaryConversions(Chain);
317 if (ChainResult.isInvalid())
318 return true;
319 if (!ChainResult.get()->getType()->isPointerType()) {
320 S.Diag(BuiltinLoc, diag::err_second_argument_to_cwsc_not_pointer)
321 << Chain->getSourceRange();
322 return true;
323 }
324
325 QualType ReturnTy = CE->getCallReturnType(S.Context);
326 QualType ArgTys[2] = { ReturnTy, ChainResult.get()->getType() };
327 QualType BuiltinTy = S.Context.getFunctionType(
328 ReturnTy, ArgTys, FunctionProtoType::ExtProtoInfo());
329 QualType BuiltinPtrTy = S.Context.getPointerType(BuiltinTy);
330
331 Builtin =
332 S.ImpCastExprToType(Builtin, BuiltinPtrTy, CK_BuiltinFnToFnPtr).get();
333
334 BuiltinCall->setType(CE->getType());
335 BuiltinCall->setValueKind(CE->getValueKind());
336 BuiltinCall->setObjectKind(CE->getObjectKind());
337 BuiltinCall->setCallee(Builtin);
338 BuiltinCall->setArg(1, ChainResult.get());
339
340 return false;
341 }
342
343 static bool SemaBuiltinSEHScopeCheck(Sema &SemaRef, CallExpr *TheCall,
344 Scope::ScopeFlags NeededScopeFlags,
345 unsigned DiagID) {
346 // Scopes aren't available during instantiation. Fortunately, builtin
347 // functions cannot be template args so they cannot be formed through template
348 // instantiation. Therefore checking once during the parse is sufficient.
349 if (SemaRef.inTemplateInstantiation())
350 return false;
351
352 Scope *S = SemaRef.getCurScope();
353 while (S && !S->isSEHExceptScope())
354 S = S->getParent();
355 if (!S || !(S->getFlags() & NeededScopeFlags)) {
356 auto *DRE = cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
357 SemaRef.Diag(TheCall->getExprLoc(), DiagID)
358 << DRE->getDecl()->getIdentifier();
359 return true;
360 }
361
362 return false;
363 }
364
365 static inline bool isBlockPointer(Expr *Arg) {
366 return Arg->getType()->isBlockPointerType();
367 }
368
369 /// OpenCL C v2.0, s6.13.17.2 - Checks that the block parameters are all local
370 /// void*, which is a requirement of device side enqueue.
371 static bool checkOpenCLBlockArgs(Sema &S, Expr *BlockArg) {
372 const BlockPointerType *BPT =
373 cast<BlockPointerType>(BlockArg->getType().getCanonicalType());
374 ArrayRef<QualType> Params =
375 BPT->getPointeeType()->getAs<FunctionProtoType>()->getParamTypes();
376 unsigned ArgCounter = 0;
377 bool IllegalParams = false;
378 // Iterate through the block parameters until either one is found that is not
379 // a local void*, or the block is valid.
380 for (ArrayRef<QualType>::iterator I = Params.begin(), E = Params.end();
381 I != E; ++I, ++ArgCounter) {
382 if (!(*I)->isPointerType() || !(*I)->getPointeeType()->isVoidType() ||
383 (*I)->getPointeeType().getQualifiers().getAddressSpace() !=
384 LangAS::opencl_local) {
385 // Get the location of the error. If a block literal has been passed
386 // (BlockExpr) then we can point straight to the offending argument,
387 // else we just point to the variable reference.
388 SourceLocation ErrorLoc;
389 if (isa<BlockExpr>(BlockArg)) {
390 BlockDecl *BD = cast<BlockExpr>(BlockArg)->getBlockDecl();
391 ErrorLoc = BD->getParamDecl(ArgCounter)->getBeginLoc();
392 } else if (isa<DeclRefExpr>(BlockArg)) {
393 ErrorLoc = cast<DeclRefExpr>(BlockArg)->getBeginLoc();
394 }
395 S.Diag(ErrorLoc,
396 diag::err_opencl_enqueue_kernel_blocks_non_local_void_args);
397 IllegalParams = true;
398 }
399 }
400
401 return IllegalParams;
402 }
403
404 static bool checkOpenCLSubgroupExt(Sema &S, CallExpr *Call) {
405 if (!S.getOpenCLOptions().isEnabled("cl_khr_subgroups")) {
406 S.Diag(Call->getBeginLoc(), diag::err_opencl_requires_extension)
407 << 1 << Call->getDirectCallee() << "cl_khr_subgroups";
408 return true;
409 }
410 return false;
411 }
412
413 static bool SemaOpenCLBuiltinNDRangeAndBlock(Sema &S, CallExpr *TheCall) {
414 if (checkArgCount(S, TheCall, 2))
415 return true;
416
417 if (checkOpenCLSubgroupExt(S, TheCall))
418 return true;
419
420 // First argument is an ndrange_t type.
421 Expr *NDRangeArg = TheCall->getArg(0);
422 if (NDRangeArg->getType().getUnqualifiedType().getAsString() != "ndrange_t") {
423 S.Diag(NDRangeArg->getBeginLoc(), diag::err_opencl_builtin_expected_type)
424 << TheCall->getDirectCallee() << "'ndrange_t'";
425 return true;
426 }
427
428 Expr *BlockArg = TheCall->getArg(1);
429 if (!isBlockPointer(BlockArg)) {
430 S.Diag(BlockArg->getBeginLoc(), diag::err_opencl_builtin_expected_type)
431 << TheCall->getDirectCallee() << "block";
432 return true;
433 }
434 return checkOpenCLBlockArgs(S, BlockArg);
435 }
436
437 /// OpenCL C v2.0, s6.13.17.6 - Check the argument to the
438 /// get_kernel_work_group_size
439 /// and get_kernel_preferred_work_group_size_multiple builtin functions.
440 static bool SemaOpenCLBuiltinKernelWorkGroupSize(Sema &S, CallExpr *TheCall) {
441 if (checkArgCount(S, TheCall, 1))
442 return true;
443
444 Expr *BlockArg = TheCall->getArg(0);
445 if (!isBlockPointer(BlockArg)) {
446 S.Diag(BlockArg->getBeginLoc(), diag::err_opencl_builtin_expected_type)
447 << TheCall->getDirectCallee() << "block";
448 return true;
449 }
450 return checkOpenCLBlockArgs(S, BlockArg);
451 }
452
453 /// Diagnose integer type and any valid implicit conversion to it.
454 static bool checkOpenCLEnqueueIntType(Sema &S, Expr *E,
455 const QualType &IntType);
456
457 static bool checkOpenCLEnqueueLocalSizeArgs(Sema &S, CallExpr *TheCall,
458 unsigned Start, unsigned End) {
459 bool IllegalParams = false;
460 for (unsigned I = Start; I <= End; ++I)
461 IllegalParams |= checkOpenCLEnqueueIntType(S, TheCall->getArg(I),
462 S.Context.getSizeType());
463 return IllegalParams;
464 }
465
466 /// OpenCL v2.0, s6.13.17.1 - Check that sizes are provided for all
467 /// 'local void*' parameter of passed block.
468 static bool checkOpenCLEnqueueVariadicArgs(Sema &S, CallExpr *TheCall,
469 Expr *BlockArg,
470 unsigned NumNonVarArgs) {
471 const BlockPointerType *BPT =
472 cast<BlockPointerType>(BlockArg->getType().getCanonicalType());
473 unsigned NumBlockParams =
474 BPT->getPointeeType()->getAs<FunctionProtoType>()->getNumParams();
475 unsigned TotalNumArgs = TheCall->getNumArgs();
476
477 // For each argument passed to the block, a corresponding uint needs to
478 // be passed to describe the size of the local memory.
479 if (TotalNumArgs != NumBlockParams + NumNonVarArgs) {
480 S.Diag(TheCall->getBeginLoc(),
481 diag::err_opencl_enqueue_kernel_local_size_args);
482 return true;
483 }
484
485 // Check that the sizes of the local memory are specified by integers.
486 return checkOpenCLEnqueueLocalSizeArgs(S, TheCall, NumNonVarArgs,
487 TotalNumArgs - 1);
488 }
489
490 /// OpenCL C v2.0, s6.13.17 - Enqueue kernel function contains four different
491 /// overload formats specified in Table 6.13.17.1.
492 /// int enqueue_kernel(queue_t queue,
493 /// kernel_enqueue_flags_t flags,
494 /// const ndrange_t ndrange,
495 /// void (^block)(void))
496 /// int enqueue_kernel(queue_t queue,
497 /// kernel_enqueue_flags_t flags,
498 /// const ndrange_t ndrange,
499 /// uint num_events_in_wait_list,
500 /// clk_event_t *event_wait_list,
501 /// clk_event_t *event_ret,
502 /// void (^block)(void))
503 /// int enqueue_kernel(queue_t queue,
504 /// kernel_enqueue_flags_t flags,
505 /// const ndrange_t ndrange,
506 /// void (^block)(local void*, ...),
507 /// uint size0, ...)
508 /// int enqueue_kernel(queue_t queue,
509 /// kernel_enqueue_flags_t flags,
510 /// const ndrange_t ndrange,
511 /// uint num_events_in_wait_list,
512 /// clk_event_t *event_wait_list,
513 /// clk_event_t *event_ret,
514 /// void (^block)(local void*, ...),
515 /// uint size0, ...)
516 static bool SemaOpenCLBuiltinEnqueueKernel(Sema &S, CallExpr *TheCall) {
517 unsigned NumArgs = TheCall->getNumArgs();
518
519 if (NumArgs < 4) {
520 S.Diag(TheCall->getBeginLoc(), diag::err_typecheck_call_too_few_args);
521 return true;
522 }
523
524 Expr *Arg0 = TheCall->getArg(0);
525 Expr *Arg1 = TheCall->getArg(1);
526 Expr *Arg2 = TheCall->getArg(2);
527 Expr *Arg3 = TheCall->getArg(3);
528
529 // First argument always needs to be a queue_t type.
530 if (!Arg0->getType()->isQueueT()) {
531 S.Diag(TheCall->getArg(0)->getBeginLoc(),
532 diag::err_opencl_builtin_expected_type)
533 << TheCall->getDirectCallee() << S.Context.OCLQueueTy;
534 return true;
535 }
536
537 // Second argument always needs to be a kernel_enqueue_flags_t enum value.
538 if (!Arg1->getType()->isIntegerType()) {
539 S.Diag(TheCall->getArg(1)->getBeginLoc(),
540 diag::err_opencl_builtin_expected_type)
541 << TheCall->getDirectCallee() << "'kernel_enqueue_flags_t' (i.e. uint)";
542 return true;
543 }
544
545 // Third argument is always an ndrange_t type.
546 if (Arg2->getType().getUnqualifiedType().getAsString() != "ndrange_t") {
547 S.Diag(TheCall->getArg(2)->getBeginLoc(),
548 diag::err_opencl_builtin_expected_type)
549 << TheCall->getDirectCallee() << "'ndrange_t'";
550 return true;
551 }
552
553 // With four arguments, there is only one form that the function could be
554 // called in: no events and no variable arguments.
555 if (NumArgs == 4) {
556 // check that the last argument is the right block type.
557 if (!isBlockPointer(Arg3)) {
558 S.Diag(Arg3->getBeginLoc(), diag::err_opencl_builtin_expected_type)
559 << TheCall->getDirectCallee() << "block";
560 return true;
561 }
562 // we have a block type, check the prototype
563 const BlockPointerType *BPT =
564 cast<BlockPointerType>(Arg3->getType().getCanonicalType());
565 if (BPT->getPointeeType()->getAs<FunctionProtoType>()->getNumParams() > 0) {
566 S.Diag(Arg3->getBeginLoc(),
567 diag::err_opencl_enqueue_kernel_blocks_no_args);
568 return true;
569 }
570 return false;
571 }
572 // we can have block + varargs.
573 if (isBlockPointer(Arg3))
574 return (checkOpenCLBlockArgs(S, Arg3) ||
575 checkOpenCLEnqueueVariadicArgs(S, TheCall, Arg3, 4));
576 // last two cases with either exactly 7 args or 7 args and varargs.
577 if (NumArgs >= 7) {
578 // check common block argument.
579 Expr *Arg6 = TheCall->getArg(6);
580 if (!isBlockPointer(Arg6)) {
581 S.Diag(Arg6->getBeginLoc(), diag::err_opencl_builtin_expected_type)
582 << TheCall->getDirectCallee() << "block";
583 return true;
584 }
585 if (checkOpenCLBlockArgs(S, Arg6))
586 return true;
587
588 // Forth argument has to be any integer type.
589 if (!Arg3->getType()->isIntegerType()) {
590 S.Diag(TheCall->getArg(3)->getBeginLoc(),
591 diag::err_opencl_builtin_expected_type)
592 << TheCall->getDirectCallee() << "integer";
593 return true;
594 }
595 // check remaining common arguments.
596 Expr *Arg4 = TheCall->getArg(4);
597 Expr *Arg5 = TheCall->getArg(5);
598
599 // Fifth argument is always passed as a pointer to clk_event_t.
600 if (!Arg4->isNullPointerConstant(S.Context,
601 Expr::NPC_ValueDependentIsNotNull) &&
602 !Arg4->getType()->getPointeeOrArrayElementType()->isClkEventT()) {
603 S.Diag(TheCall->getArg(4)->getBeginLoc(),
604 diag::err_opencl_builtin_expected_type)
605 << TheCall->getDirectCallee()
606 << S.Context.getPointerType(S.Context.OCLClkEventTy);
607 return true;
608 }
609
610 // Sixth argument is always passed as a pointer to clk_event_t.
611 if (!Arg5->isNullPointerConstant(S.Context,
612 Expr::NPC_ValueDependentIsNotNull) &&
613 !(Arg5->getType()->isPointerType() &&
614 Arg5->getType()->getPointeeType()->isClkEventT())) {
615 S.Diag(TheCall->getArg(5)->getBeginLoc(),
616 diag::err_opencl_builtin_expected_type)
617 << TheCall->getDirectCallee()
618 << S.Context.getPointerType(S.Context.OCLClkEventTy);
619 return true;
620 }
621
622 if (NumArgs == 7)
623 return false;
624
625 return checkOpenCLEnqueueVariadicArgs(S, TheCall, Arg6, 7);
626 }
627
628 // None of the specific case has been detected, give generic error
629 S.Diag(TheCall->getBeginLoc(),
630 diag::err_opencl_enqueue_kernel_incorrect_args);
631 return true;
632 }
633
634 /// Returns OpenCL access qual.
635 static OpenCLAccessAttr *getOpenCLArgAccess(const Decl *D) {
636 return D->getAttr<OpenCLAccessAttr>();
637 }
638
639 /// Returns true if pipe element type is different from the pointer.
640 static bool checkOpenCLPipeArg(Sema &S, CallExpr *Call) {
641 const Expr *Arg0 = Call->getArg(0);
642 // First argument type should always be pipe.
643 if (!Arg0->getType()->isPipeType()) {
644 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_first_arg)
645 << Call->getDirectCallee() << Arg0->getSourceRange();
646 return true;
647 }
648 OpenCLAccessAttr *AccessQual =
649 getOpenCLArgAccess(cast<DeclRefExpr>(Arg0)->getDecl());
650 // Validates the access qualifier is compatible with the call.
651 // OpenCL v2.0 s6.13.16 - The access qualifiers for pipe should only be
652 // read_only and write_only, and assumed to be read_only if no qualifier is
653 // specified.
654 switch (Call->getDirectCallee()->getBuiltinID()) {
655 case Builtin::BIread_pipe:
656 case Builtin::BIreserve_read_pipe:
657 case Builtin::BIcommit_read_pipe:
658 case Builtin::BIwork_group_reserve_read_pipe:
659 case Builtin::BIsub_group_reserve_read_pipe:
660 case Builtin::BIwork_group_commit_read_pipe:
661 case Builtin::BIsub_group_commit_read_pipe:
662 if (!(!AccessQual || AccessQual->isReadOnly())) {
663 S.Diag(Arg0->getBeginLoc(),
664 diag::err_opencl_builtin_pipe_invalid_access_modifier)
665 << "read_only" << Arg0->getSourceRange();
666 return true;
667 }
668 break;
669 case Builtin::BIwrite_pipe:
670 case Builtin::BIreserve_write_pipe:
671 case Builtin::BIcommit_write_pipe:
672 case Builtin::BIwork_group_reserve_write_pipe:
673 case Builtin::BIsub_group_reserve_write_pipe:
674 case Builtin::BIwork_group_commit_write_pipe:
675 case Builtin::BIsub_group_commit_write_pipe:
676 if (!(AccessQual && AccessQual->isWriteOnly())) {
677 S.Diag(Arg0->getBeginLoc(),
678 diag::err_opencl_builtin_pipe_invalid_access_modifier)
679 << "write_only" << Arg0->getSourceRange();
680 return true;
681 }
682 break;
683 default:
684 break;
685 }
686 return false;
687 }
688
689 /// Returns true if pipe element type is different from the pointer.
690 static bool checkOpenCLPipePacketType(Sema &S, CallExpr *Call, unsigned Idx) {
691 const Expr *Arg0 = Call->getArg(0);
692 const Expr *ArgIdx = Call->getArg(Idx);
693 const PipeType *PipeTy = cast<PipeType>(Arg0->getType());
694 const QualType EltTy = PipeTy->getElementType();
695 const PointerType *ArgTy = ArgIdx->getType()->getAs<PointerType>();
696 // The Idx argument should be a pointer and the type of the pointer and
697 // the type of pipe element should also be the same.
698 if (!ArgTy ||
699 !S.Context.hasSameType(
700 EltTy, ArgTy->getPointeeType()->getCanonicalTypeInternal())) {
701 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_invalid_arg)
702 << Call->getDirectCallee() << S.Context.getPointerType(EltTy)
703 << ArgIdx->getType() << ArgIdx->getSourceRange();
704 return true;
705 }
706 return false;
707 }
708
709 // Performs semantic analysis for the read/write_pipe call.
710 // \param S Reference to the semantic analyzer.
711 // \param Call A pointer to the builtin call.
712 // \return True if a semantic error has been found, false otherwise.
713 static bool SemaBuiltinRWPipe(Sema &S, CallExpr *Call) {
714 // OpenCL v2.0 s6.13.16.2 - The built-in read/write
715 // functions have two forms.
716 switch (Call->getNumArgs()) {
717 case 2:
718 if (checkOpenCLPipeArg(S, Call))
719 return true;
720 // The call with 2 arguments should be
721 // read/write_pipe(pipe T, T*).
722 // Check packet type T.
723 if (checkOpenCLPipePacketType(S, Call, 1))
724 return true;
725 break;
726
727 case 4: {
728 if (checkOpenCLPipeArg(S, Call))
729 return true;
730 // The call with 4 arguments should be
731 // read/write_pipe(pipe T, reserve_id_t, uint, T*).
732 // Check reserve_id_t.
733 if (!Call->getArg(1)->getType()->isReserveIDT()) {
734 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_invalid_arg)
735 << Call->getDirectCallee() << S.Context.OCLReserveIDTy
736 << Call->getArg(1)->getType() << Call->getArg(1)->getSourceRange();
737 return true;
738 }
739
740 // Check the index.
741 const Expr *Arg2 = Call->getArg(2);
742 if (!Arg2->getType()->isIntegerType() &&
743 !Arg2->getType()->isUnsignedIntegerType()) {
744 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_invalid_arg)
745 << Call->getDirectCallee() << S.Context.UnsignedIntTy
746 << Arg2->getType() << Arg2->getSourceRange();
747 return true;
748 }
749
750 // Check packet type T.
751 if (checkOpenCLPipePacketType(S, Call, 3))
752 return true;
753 } break;
754 default:
755 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_arg_num)
756 << Call->getDirectCallee() << Call->getSourceRange();
757 return true;
758 }
759
760 return false;
761 }
762
763 // Performs a semantic analysis on the {work_group_/sub_group_
764 // /_}reserve_{read/write}_pipe
765 // \param S Reference to the semantic analyzer.
766 // \param Call The call to the builtin function to be analyzed.
767 // \return True if a semantic error was found, false otherwise.
768 static bool SemaBuiltinReserveRWPipe(Sema &S, CallExpr *Call) {
769 if (checkArgCount(S, Call, 2))
770 return true;
771
772 if (checkOpenCLPipeArg(S, Call))
773 return true;
774
775 // Check the reserve size.
776 if (!Call->getArg(1)->getType()->isIntegerType() &&
777 !Call->getArg(1)->getType()->isUnsignedIntegerType()) {
778 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_invalid_arg)
779 << Call->getDirectCallee() << S.Context.UnsignedIntTy
780 << Call->getArg(1)->getType() << Call->getArg(1)->getSourceRange();
781 return true;
782 }
783
784 // Since return type of reserve_read/write_pipe built-in function is
785 // reserve_id_t, which is not defined in the builtin def file , we used int
786 // as return type and need to override the return type of these functions.
787 Call->setType(S.Context.OCLReserveIDTy);
788
789 return false;
790 }
791
792 // Performs a semantic analysis on {work_group_/sub_group_
793 // /_}commit_{read/write}_pipe
794 // \param S Reference to the semantic analyzer.
795 // \param Call The call to the builtin function to be analyzed.
796 // \return True if a semantic error was found, false otherwise.
797 static bool SemaBuiltinCommitRWPipe(Sema &S, CallExpr *Call) {
798 if (checkArgCount(S, Call, 2))
799 return true;
800
801 if (checkOpenCLPipeArg(S, Call))
802 return true;
803
804 // Check reserve_id_t.
805 if (!Call->getArg(1)->getType()->isReserveIDT()) {
806 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_invalid_arg)
807 << Call->getDirectCallee() << S.Context.OCLReserveIDTy
808 << Call->getArg(1)->getType() << Call->getArg(1)->getSourceRange();
809 return true;
810 }
811
812 return false;
813 }
814
815 // Performs a semantic analysis on the call to built-in Pipe
816 // Query Functions.
817 // \param S Reference to the semantic analyzer.
818 // \param Call The call to the builtin function to be analyzed.
819 // \return True if a semantic error was found, false otherwise.
820 static bool SemaBuiltinPipePackets(Sema &S, CallExpr *Call) {
821 if (checkArgCount(S, Call, 1))
822 return true;
823
824 if (!Call->getArg(0)->getType()->isPipeType()) {
825 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_pipe_first_arg)
826 << Call->getDirectCallee() << Call->getArg(0)->getSourceRange();
827 return true;
828 }
829
830 return false;
831 }
832
833 // OpenCL v2.0 s6.13.9 - Address space qualifier functions.
834 // Performs semantic analysis for the to_global/local/private call.
835 // \param S Reference to the semantic analyzer.
836 // \param BuiltinID ID of the builtin function.
837 // \param Call A pointer to the builtin call.
838 // \return True if a semantic error has been found, false otherwise.
839 static bool SemaOpenCLBuiltinToAddr(Sema &S, unsigned BuiltinID,
840 CallExpr *Call) {
841 if (Call->getNumArgs() != 1) {
842 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_to_addr_arg_num)
843 << Call->getDirectCallee() << Call->getSourceRange();
844 return true;
845 }
846
847 auto RT = Call->getArg(0)->getType();
848 if (!RT->isPointerType() || RT->getPointeeType()
849 .getAddressSpace() == LangAS::opencl_constant) {
850 S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_to_addr_invalid_arg)
851 << Call->getArg(0) << Call->getDirectCallee() << Call->getSourceRange();
852 return true;
853 }
854
855 if (RT->getPointeeType().getAddressSpace() != LangAS::opencl_generic) {
856 S.Diag(Call->getArg(0)->getBeginLoc(),
857 diag::warn_opencl_generic_address_space_arg)
858 << Call->getDirectCallee()->getNameInfo().getAsString()
859 << Call->getArg(0)->getSourceRange();
860 }
861
862 RT = RT->getPointeeType();
863 auto Qual = RT.getQualifiers();
864 switch (BuiltinID) {
865 case Builtin::BIto_global:
866 Qual.setAddressSpace(LangAS::opencl_global);
867 break;
868 case Builtin::BIto_local:
869 Qual.setAddressSpace(LangAS::opencl_local);
870 break;
871 case Builtin::BIto_private:
872 Qual.setAddressSpace(LangAS::opencl_private);
873 break;
874 default:
875 llvm_unreachable("Invalid builtin function");
876 }
877 Call->setType(S.Context.getPointerType(S.Context.getQualifiedType(
878 RT.getUnqualifiedType(), Qual)));
879
880 return false;
881 }
882
883 static ExprResult SemaBuiltinLaunder(Sema &S, CallExpr *TheCall) {
884 if (checkArgCount(S, TheCall, 1))
885 return ExprError();
886
887 // Compute __builtin_launder's parameter type from the argument.
888 // The parameter type is:
889 // * The type of the argument if it's not an array or function type,
890 // Otherwise,
891 // * The decayed argument type.
892 QualType ParamTy = [&]() {
893 QualType ArgTy = TheCall->getArg(0)->getType();
894 if (const ArrayType *Ty = ArgTy->getAsArrayTypeUnsafe())
895 return S.Context.getPointerType(Ty->getElementType());
896 if (ArgTy->isFunctionType()) {
897 return S.Context.getPointerType(ArgTy);
898 }
899 return ArgTy;
900 }();
901
902 TheCall->setType(ParamTy);
903
904 auto DiagSelect = [&]() -> llvm::Optional<unsigned> {
905 if (!ParamTy->isPointerType())
906 return 0;
907 if (ParamTy->isFunctionPointerType())
908 return 1;
909 if (ParamTy->isVoidPointerType())
910 return 2;
911 return llvm::Optional<unsigned>{};
912 }();
913 if (DiagSelect.hasValue()) {
914 S.Diag(TheCall->getBeginLoc(), diag::err_builtin_launder_invalid_arg)
915 << DiagSelect.getValue() << TheCall->getSourceRange();
916 return ExprError();
917 }
918
919 // We either have an incomplete class type, or we have a class template
920 // whose instantiation has not been forced. Example:
921 //
922 // template <class T> struct Foo { T value; };
923 // Foo<int> *p = nullptr;
924 // auto *d = __builtin_launder(p);
925 if (S.RequireCompleteType(TheCall->getBeginLoc(), ParamTy->getPointeeType(),
926 diag::err_incomplete_type))
927 return ExprError();
928
929 assert(ParamTy->getPointeeType()->isObjectType() &&
930 "Unhandled non-object pointer case");
931
932 InitializedEntity Entity =
933 InitializedEntity::InitializeParameter(S.Context, ParamTy, false);
934 ExprResult Arg =
935 S.PerformCopyInitialization(Entity, SourceLocation(), TheCall->getArg(0));
936 if (Arg.isInvalid())
937 return ExprError();
938 TheCall->setArg(0, Arg.get());
939
940 return TheCall;
941 }
942
943 // Emit an error and return true if the current architecture is not in the list
944 // of supported architectures.
945 static bool
946 CheckBuiltinTargetSupport(Sema &S, unsigned BuiltinID, CallExpr *TheCall,
947 ArrayRef<llvm::Triple::ArchType> SupportedArchs) {
948 llvm::Triple::ArchType CurArch =
949 S.getASTContext().getTargetInfo().getTriple().getArch();
950 if (llvm::is_contained(SupportedArchs, CurArch))
951 return false;
952 S.Diag(TheCall->getBeginLoc(), diag::err_builtin_target_unsupported)
953 << TheCall->getSourceRange();
954 return true;
955 }
956
957 ExprResult
958 Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
959 CallExpr *TheCall) {
960 ExprResult TheCallResult(TheCall);
961
962 // Find out if any arguments are required to be integer constant expressions.
963 unsigned ICEArguments = 0;
964 ASTContext::GetBuiltinTypeError Error;
965 Context.GetBuiltinType(BuiltinID, Error, &ICEArguments);
966 if (Error != ASTContext::GE_None)
967 ICEArguments = 0; // Don't diagnose previously diagnosed errors.
968
969 // If any arguments are required to be ICE's, check and diagnose.
970 for (unsigned ArgNo = 0; ICEArguments != 0; ++ArgNo) {
971 // Skip arguments not required to be ICE's.
972 if ((ICEArguments & (1 << ArgNo)) == 0) continue;
973
974 llvm::APSInt Result;
975 if (SemaBuiltinConstantArg(TheCall, ArgNo, Result))
976 return true;
977 ICEArguments &= ~(1 << ArgNo);
978 }
979
980 switch (BuiltinID) {
981 case Builtin::BI__builtin___CFStringMakeConstantString:
982 assert(TheCall->getNumArgs() == 1 &&
983 "Wrong # arguments to builtin CFStringMakeConstantString");
984 if (CheckObjCString(TheCall->getArg(0)))
985 return ExprError();
986 break;
987 case Builtin::BI__builtin_ms_va_start:
988 case Builtin::BI__builtin_stdarg_start:
989 case Builtin::BI__builtin_va_start:
990 if (SemaBuiltinVAStart(BuiltinID, TheCall))
991 return ExprError();
992 break;
993 case Builtin::BI__va_start: {
994 switch (Context.getTargetInfo().getTriple().getArch()) {
995 case llvm::Triple::aarch64:
996 case llvm::Triple::arm:
997 case llvm::Triple::thumb:
998 if (SemaBuiltinVAStartARMMicrosoft(TheCall))
999 return ExprError();
1000 break;
1001 default:
1002 if (SemaBuiltinVAStart(BuiltinID, TheCall))
1003 return ExprError();
1004 break;
1005 }
1006 break;
1007 }
1008
1009 // The acquire, release, and no fence variants are ARM and AArch64 only.
1010 case Builtin::BI_interlockedbittestandset_acq:
1011 case Builtin::BI_interlockedbittestandset_rel:
1012 case Builtin::BI_interlockedbittestandset_nf:
1013 case Builtin::BI_interlockedbittestandreset_acq:
1014 case Builtin::BI_interlockedbittestandreset_rel:
1015 case Builtin::BI_interlockedbittestandreset_nf:
1016 if (CheckBuiltinTargetSupport(
1017 *this, BuiltinID, TheCall,
1018 {llvm::Triple::arm, llvm::Triple::thumb, llvm::Triple::aarch64}))
1019 return ExprError();
1020 break;
1021
1022 // The 64-bit bittest variants are x64, ARM, and AArch64 only.
1023 case Builtin::BI_bittest64:
1024 case Builtin::BI_bittestandcomplement64:
1025 case Builtin::BI_bittestandreset64:
1026 case Builtin::BI_bittestandset64:
1027 case Builtin::BI_interlockedbittestandreset64:
1028 case Builtin::BI_interlockedbittestandset64:
1029 if (CheckBuiltinTargetSupport(*this, BuiltinID, TheCall,
1030 {llvm::Triple::x86_64, llvm::Triple::arm,
1031 llvm::Triple::thumb, llvm::Triple::aarch64}))
1032 return ExprError();
1033 break;
1034
1035 case Builtin::BI__builtin_isgreater:
1036 case Builtin::BI__builtin_isgreaterequal:
1037 case Builtin::BI__builtin_isless:
1038 case Builtin::BI__builtin_islessequal:
1039 case Builtin::BI__builtin_islessgreater:
1040 case Builtin::BI__builtin_isunordered:
1041 if (SemaBuiltinUnorderedCompare(TheCall))
1042 return ExprError();
1043 break;
1044 case Builtin::BI__builtin_fpclassify:
1045 if (SemaBuiltinFPClassification(TheCall, 6))
1046 return ExprError();
1047 break;
1048 case Builtin::BI__builtin_isfinite:
1049 case Builtin::BI__builtin_isinf:
1050 case Builtin::BI__builtin_isinf_sign:
1051 case Builtin::BI__builtin_isnan:
1052 case Builtin::BI__builtin_isnormal:
1053 case Builtin::BI__builtin_signbit:
1054 case Builtin::BI__builtin_signbitf:
1055 case Builtin::BI__builtin_signbitl:
1056 if (SemaBuiltinFPClassification(TheCall, 1))
1057 return ExprError();
1058 break;
1059 case Builtin::BI__builtin_shufflevector:
1060 return SemaBuiltinShuffleVector(TheCall);
1061 // TheCall will be freed by the smart pointer here, but that's fine, since
1062 // SemaBuiltinShuffleVector guts it, but then doesn't release it.
1063 case Builtin::BI__builtin_prefetch:
1064 if (SemaBuiltinPrefetch(TheCall))
1065 return ExprError();
1066 break;
1067 case Builtin::BI__builtin_alloca_with_align:
1068 if (SemaBuiltinAllocaWithAlign(TheCall))
1069 return ExprError();
1070 break;
1071 case Builtin::BI__assume:
1072 case Builtin::BI__builtin_assume:
1073 if (SemaBuiltinAssume(TheCall))
1074 return ExprError();
1075 break;
1076 case Builtin::BI__builtin_assume_aligned:
1077 if (SemaBuiltinAssumeAligned(TheCall))
1078 return ExprError();
1079 break;
1080 case Builtin::BI__builtin_object_size:
1081 if (SemaBuiltinConstantArgRange(TheCall, 1, 0, 3))
1082 return ExprError();
1083 break;
1084 case Builtin::BI__builtin_longjmp:
1085 if (SemaBuiltinLongjmp(TheCall))
1086 return ExprError();
1087 break;
1088 case Builtin::BI__builtin_setjmp:
1089 if (SemaBuiltinSetjmp(TheCall))
1090 return ExprError();
1091 break;
1092 case Builtin::BI_setjmp:
1093 case Builtin::BI_setjmpex:
1094 if (checkArgCount(*this, TheCall, 1))
1095 return true;
1096 break;
1097 case Builtin::BI__builtin_classify_type:
1098 if (checkArgCount(*this, TheCall, 1)) return true;
1099 TheCall->setType(Context.IntTy);
1100 break;
1101 case Builtin::BI__builtin_constant_p:
1102 if (checkArgCount(*this, TheCall, 1)) return true;
1103 TheCall->setType(Context.IntTy);
1104 break;
1105 case Builtin::BI__builtin_launder:
1106 return SemaBuiltinLaunder(*this, TheCall);
1107 case Builtin::BI__sync_fetch_and_add:
1108 case Builtin::BI__sync_fetch_and_add_1:
1109 case Builtin::BI__sync_fetch_and_add_2:
1110 case Builtin::BI__sync_fetch_and_add_4:
1111 case Builtin::BI__sync_fetch_and_add_8:
1112 case Builtin::BI__sync_fetch_and_add_16:
1113 case Builtin::BI__sync_fetch_and_sub:
1114 case Builtin::BI__sync_fetch_and_sub_1:
1115 case Builtin::BI__sync_fetch_and_sub_2:
1116 case Builtin::BI__sync_fetch_and_sub_4:
1117 case Builtin::BI__sync_fetch_and_sub_8:
1118 case Builtin::BI__sync_fetch_and_sub_16:
1119 case Builtin::BI__sync_fetch_and_or:
1120 case Builtin::BI__sync_fetch_and_or_1:
1121 case Builtin::BI__sync_fetch_and_or_2:
1122 case Builtin::BI__sync_fetch_and_or_4:
1123 case Builtin::BI__sync_fetch_and_or_8:
1124 case Builtin::BI__sync_fetch_and_or_16:
1125 case Builtin::BI__sync_fetch_and_and:
1126 case Builtin::BI__sync_fetch_and_and_1:
1127 case Builtin::BI__sync_fetch_and_and_2:
1128 case Builtin::BI__sync_fetch_and_and_4:
1129 case Builtin::BI__sync_fetch_and_and_8:
1130 case Builtin::BI__sync_fetch_and_and_16:
1131 case Builtin::BI__sync_fetch_and_xor:
1132 case Builtin::BI__sync_fetch_and_xor_1:
1133 case Builtin::BI__sync_fetch_and_xor_2:
1134 case Builtin::BI__sync_fetch_and_xor_4:
1135 case Builtin::BI__sync_fetch_and_xor_8:
1136 case Builtin::BI__sync_fetch_and_xor_16:
1137 case Builtin::BI__sync_fetch_and_nand:
1138 case Builtin::BI__sync_fetch_and_nand_1:
1139 case Builtin::BI__sync_fetch_and_nand_2:
1140 case Builtin::BI__sync_fetch_and_nand_4:
1141 case Builtin::BI__sync_fetch_and_nand_8:
1142 case Builtin::BI__sync_fetch_and_nand_16:
1143 case Builtin::BI__sync_add_and_fetch:
1144 case Builtin::BI__sync_add_and_fetch_1:
1145 case Builtin::BI__sync_add_and_fetch_2:
1146 case Builtin::BI__sync_add_and_fetch_4:
1147 case Builtin::BI__sync_add_and_fetch_8:
1148 case Builtin::BI__sync_add_and_fetch_16:
1149 case Builtin::BI__sync_sub_and_fetch:
1150 case Builtin::BI__sync_sub_and_fetch_1:
1151 case Builtin::BI__sync_sub_and_fetch_2:
1152 case Builtin::BI__sync_sub_and_fetch_4:
1153 case Builtin::BI__sync_sub_and_fetch_8:
1154 case Builtin::BI__sync_sub_and_fetch_16:
1155 case Builtin::BI__sync_and_and_fetch:
1156 case Builtin::BI__sync_and_and_fetch_1:
1157 case Builtin::BI__sync_and_and_fetch_2:
1158 case Builtin::BI__sync_and_and_fetch_4:
1159 case Builtin::BI__sync_and_and_fetch_8:
1160 case Builtin::BI__sync_and_and_fetch_16:
1161 case Builtin::BI__sync_or_and_fetch:
1162 case Builtin::BI__sync_or_and_fetch_1:
1163 case Builtin::BI__sync_or_and_fetch_2:
1164 case Builtin::BI__sync_or_and_fetch_4:
1165 case Builtin::BI__sync_or_and_fetch_8:
1166 case Builtin::BI__sync_or_and_fetch_16:
1167 case Builtin::BI__sync_xor_and_fetch:
1168 case Builtin::BI__sync_xor_and_fetch_1:
1169 case Builtin::BI__sync_xor_and_fetch_2:
1170 case Builtin::BI__sync_xor_and_fetch_4:
1171 case Builtin::BI__sync_xor_and_fetch_8:
1172 case Builtin::BI__sync_xor_and_fetch_16:
1173 case Builtin::BI__sync_nand_and_fetch:
1174 case Builtin::BI__sync_nand_and_fetch_1:
1175 case Builtin::BI__sync_nand_and_fetch_2:
1176 case Builtin::BI__sync_nand_and_fetch_4:
1177 case Builtin::BI__sync_nand_and_fetch_8:
1178 case Builtin::BI__sync_nand_and_fetch_16:
1179 case Builtin::BI__sync_val_compare_and_swap:
1180 case Builtin::BI__sync_val_compare_and_swap_1:
1181 case Builtin::BI__sync_val_compare_and_swap_2:
1182 case Builtin::BI__sync_val_compare_and_swap_4:
1183 case Builtin::BI__sync_val_compare_and_swap_8:
1184 case Builtin::BI__sync_val_compare_and_swap_16:
1185 case Builtin::BI__sync_bool_compare_and_swap:
1186 case Builtin::BI__sync_bool_compare_and_swap_1:
1187 case Builtin::BI__sync_bool_compare_and_swap_2:
1188 case Builtin::BI__sync_bool_compare_and_swap_4:
1189 case Builtin::BI__sync_bool_compare_and_swap_8:
1190 case Builtin::BI__sync_bool_compare_and_swap_16:
1191 case Builtin::BI__sync_lock_test_and_set:
1192 case Builtin::BI__sync_lock_test_and_set_1:
1193 case Builtin::BI__sync_lock_test_and_set_2:
1194 case Builtin::BI__sync_lock_test_and_set_4:
1195 case Builtin::BI__sync_lock_test_and_set_8:
1196 case Builtin::BI__sync_lock_test_and_set_16:
1197 case Builtin::BI__sync_lock_release:
1198 case Builtin::BI__sync_lock_release_1:
1199 case Builtin::BI__sync_lock_release_2:
1200 case Builtin::BI__sync_lock_release_4:
1201 case Builtin::BI__sync_lock_release_8:
1202 case Builtin::BI__sync_lock_release_16:
1203 case Builtin::BI__sync_swap:
1204 case Builtin::BI__sync_swap_1:
1205 case Builtin::BI__sync_swap_2:
1206 case Builtin::BI__sync_swap_4:
1207 case Builtin::BI__sync_swap_8:
1208 case Builtin::BI__sync_swap_16:
1209 return SemaBuiltinAtomicOverloaded(TheCallResult);
1210 case Builtin::BI__sync_synchronize:
1211 Diag(TheCall->getBeginLoc(), diag::warn_atomic_implicit_seq_cst)
1212 << TheCall->getCallee()->getSourceRange();
1213 break;
1214 case Builtin::BI__builtin_nontemporal_load:
1215 case Builtin::BI__builtin_nontemporal_store:
1216 return SemaBuiltinNontemporalOverloaded(TheCallResult);
1217 #define BUILTIN(ID, TYPE, ATTRS)
1218 #define ATOMIC_BUILTIN(ID, TYPE, ATTRS) \
1219 case Builtin::BI##ID: \
1220 return SemaAtomicOpsOverloaded(TheCallResult, AtomicExpr::AO##ID);
1221 #include "clang/Basic/Builtins.def"
1222 case Builtin::BI__annotation:
1223 if (SemaBuiltinMSVCAnnotation(*this, TheCall))
1224 return ExprError();
1225 break;
1226 case Builtin::BI__builtin_annotation:
1227 if (SemaBuiltinAnnotation(*this, TheCall))
1228 return ExprError();
1229 break;
1230 case Builtin::BI__builtin_addressof:
1231 if (SemaBuiltinAddressof(*this, TheCall))
1232 return ExprError();
1233 break;
1234 case Builtin::BI__builtin_add_overflow:
1235 case Builtin::BI__builtin_sub_overflow:
1236 case Builtin::BI__builtin_mul_overflow:
1237 if (SemaBuiltinOverflow(*this, TheCall))
1238 return ExprError();
1239 break;
1240 case Builtin::BI__builtin_operator_new:
1241 case Builtin::BI__builtin_operator_delete: {
1242 bool IsDelete = BuiltinID == Builtin::BI__builtin_operator_delete;
1243 ExprResult Res =
1244 SemaBuiltinOperatorNewDeleteOverloaded(TheCallResult, IsDelete);
1245 if (Res.isInvalid())
1246 CorrectDelayedTyposInExpr(TheCallResult.get());
1247 return Res;
1248 }
1249 case Builtin::BI__builtin_dump_struct: {
1250 // We first want to ensure we are called with 2 arguments
1251 if (checkArgCount(*this, TheCall, 2))
1252 return ExprError();
1253 // Ensure that the first argument is of type 'struct XX *'
1254 const Expr *PtrArg = TheCall->getArg(0)->IgnoreParenImpCasts();
1255 const QualType PtrArgType = PtrArg->getType();
1256 if (!PtrArgType->isPointerType() ||
1257 !PtrArgType->getPointeeType()->isRecordType()) {
1258 Diag(PtrArg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
1259 << PtrArgType << "structure pointer" << 1 << 0 << 3 << 1 << PtrArgType
1260 << "structure pointer";
1261 return ExprError();
1262 }
1263
1264 // Ensure that the second argument is of type 'FunctionType'
1265 const Expr *FnPtrArg = TheCall->getArg(1)->IgnoreImpCasts();
1266 const QualType FnPtrArgType = FnPtrArg->getType();
1267 if (!FnPtrArgType->isPointerType()) {
1268 Diag(FnPtrArg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
1269 << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3 << 2
1270 << FnPtrArgType << "'int (*)(const char *, ...)'";
1271 return ExprError();
1272 }
1273
1274 const auto *FuncType =
1275 FnPtrArgType->getPointeeType()->getAs<FunctionType>();
1276
1277 if (!FuncType) {
1278 Diag(FnPtrArg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
1279 << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3 << 2
1280 << FnPtrArgType << "'int (*)(const char *, ...)'";
1281 return ExprError();
1282 }
1283
1284 if (const auto *FT = dyn_cast<FunctionProtoType>(FuncType)) {
1285 if (!FT->getNumParams()) {
1286 Diag(FnPtrArg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
1287 << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
1288 << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
1289 return ExprError();
1290 }
1291 QualType PT = FT->getParamType(0);
1292 if (!FT->isVariadic() || FT->getReturnType() != Context.IntTy ||
1293 !PT->isPointerType() || !PT->getPointeeType()->isCharType() ||
1294 !PT->getPointeeType().isConstQualified()) {
1295 Diag(FnPtrArg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
1296 << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
1297 << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
1298 return ExprError();
1299 }
1300 }
1301
1302 TheCall->setType(Context.IntTy);
1303 break;
1304 }
1305
1306 // check secure string manipulation functions where overflows
1307 // are detectable at compile time
1308 case Builtin::BI__builtin___memcpy_chk:
1309 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "memcpy");
1310 break;
1311 case Builtin::BI__builtin___memmove_chk:
1312 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "memmove");
1313 break;
1314 case Builtin::BI__builtin___memset_chk:
1315 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "memset");
1316 break;
1317 case Builtin::BI__builtin___strlcat_chk:
1318 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "strlcat");
1319 break;
1320 case Builtin::BI__builtin___strlcpy_chk:
1321 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "strlcpy");
1322 break;
1323 case Builtin::BI__builtin___strncat_chk:
1324 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "strncat");
1325 break;
1326 case Builtin::BI__builtin___strncpy_chk:
1327 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "strncpy");
1328 break;
1329 case Builtin::BI__builtin___stpncpy_chk:
1330 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 2, 3, "stpncpy");
1331 break;
1332 case Builtin::BI__builtin___memccpy_chk:
1333 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 3, 4, "memccpy");
1334 break;
1335 case Builtin::BI__builtin___snprintf_chk:
1336 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 1, 3, "snprintf");
1337 break;
1338 case Builtin::BI__builtin___vsnprintf_chk:
1339 SemaBuiltinMemChkCall(*this, FDecl, TheCall, 1, 3, "vsnprintf");
1340 break;
1341 case Builtin::BI__builtin_call_with_static_chain:
1342 if (SemaBuiltinCallWithStaticChain(*this, TheCall))
1343 return ExprError();
1344 break;
1345 case Builtin::BI__exception_code:
1346 case Builtin::BI_exception_code:
1347 if (SemaBuiltinSEHScopeCheck(*this, TheCall, Scope::SEHExceptScope,
1348 diag::err_seh___except_block))
1349 return ExprError();
1350 break;
1351 case Builtin::BI__exception_info:
1352 case Builtin::BI_exception_info:
1353 if (SemaBuiltinSEHScopeCheck(*this, TheCall, Scope::SEHFilterScope,
1354 diag::err_seh___except_filter))
1355 return ExprError();
1356 break;
1357 case Builtin::BI__GetExceptionInfo:
1358 if (checkArgCount(*this, TheCall, 1))
1359 return ExprError();
1360
1361 if (CheckCXXThrowOperand(
1362 TheCall->getBeginLoc(),
1363 Context.getExceptionObjectType(FDecl->getParamDecl(0)->getType()),
1364 TheCall))
1365 return ExprError();
1366
1367 TheCall->setType(Context.VoidPtrTy);
1368 break;
1369 // OpenCL v2.0, s6.13.16 - Pipe functions
1370 case Builtin::BIread_pipe:
1371 case Builtin::BIwrite_pipe:
1372 // Since those two functions are declared with var args, we need a semantic
1373 // check for the argument.
1374 if (SemaBuiltinRWPipe(*this, TheCall))
1375 return ExprError();
1376 break;
1377 case Builtin::BIreserve_read_pipe:
1378 case Builtin::BIreserve_write_pipe:
1379 case Builtin::BIwork_group_reserve_read_pipe:
1380 case Builtin::BIwork_group_reserve_write_pipe:
1381 if (SemaBuiltinReserveRWPipe(*this, TheCall))
1382 return ExprError();
1383 break;
1384 case Builtin::BIsub_group_reserve_read_pipe:
1385 case Builtin::BIsub_group_reserve_write_pipe:
1386 if (checkOpenCLSubgroupExt(*this, TheCall) ||
1387 SemaBuiltinReserveRWPipe(*this, TheCall))
1388 return ExprError();
1389 break;
1390 case Builtin::BIcommit_read_pipe:
1391 case Builtin::BIcommit_write_pipe:
1392 case Builtin::BIwork_group_commit_read_pipe:
1393 case Builtin::BIwork_group_commit_write_pipe:
1394 if (SemaBuiltinCommitRWPipe(*this, TheCall))
1395 return ExprError();
1396 break;
1397 case Builtin::BIsub_group_commit_read_pipe:
1398 case Builtin::BIsub_group_commit_write_pipe:
1399 if (checkOpenCLSubgroupExt(*this, TheCall) ||
1400 SemaBuiltinCommitRWPipe(*this, TheCall))
1401 return ExprError();
1402 break;
1403 case Builtin::BIget_pipe_num_packets:
1404 case Builtin::BIget_pipe_max_packets:
1405 if (SemaBuiltinPipePackets(*this, TheCall))
1406 return ExprError();
1407 break;
1408 case Builtin::BIto_global:
1409 case Builtin::BIto_local:
1410 case Builtin::BIto_private:
1411 if (SemaOpenCLBuiltinToAddr(*this, BuiltinID, TheCall))
1412 return ExprError();
1413 break;
1414 // OpenCL v2.0, s6.13.17 - Enqueue kernel functions.
1415 case Builtin::BIenqueue_kernel:
1416 if (SemaOpenCLBuiltinEnqueueKernel(*this, TheCall))
1417 return ExprError();
1418 break;
1419 case Builtin::BIget_kernel_work_group_size:
1420 case Builtin::BIget_kernel_preferred_work_group_size_multiple:
1421 if (SemaOpenCLBuiltinKernelWorkGroupSize(*this, TheCall))
1422 return ExprError();
1423 break;
1424 case Builtin::BIget_kernel_max_sub_group_size_for_ndrange:
1425 case Builtin::BIget_kernel_sub_group_count_for_ndrange:
1426 if (SemaOpenCLBuiltinNDRangeAndBlock(*this, TheCall))
1427 return ExprError();
1428 break;
1429 case Builtin::BI__builtin_os_log_format:
1430 case Builtin::BI__builtin_os_log_format_buffer_size:
1431 if (SemaBuiltinOSLogFormat(TheCall))
1432 return ExprError();
1433 break;
1434 }
1435
1436 // Since the target specific builtins for each arch overlap, only check those
1437 // of the arch we are compiling for.
1438 if (Context.BuiltinInfo.isTSBuiltin(BuiltinID)) {
1439 switch (Context.getTargetInfo().getTriple().getArch()) {
1440 case llvm::Triple::arm:
1441 case llvm::Triple::armeb:
1442 case llvm::Triple::thumb:
1443 case llvm::Triple::thumbeb:
1444 if (CheckARMBuiltinFunctionCall(BuiltinID, TheCall))
1445 return ExprError();
1446 break;
1447 case llvm::Triple::aarch64:
1448 case llvm::Triple::aarch64_be:
1449 if (CheckAArch64BuiltinFunctionCall(BuiltinID, TheCall))
1450 return ExprError();
1451 break;
1452 case llvm::Triple::hexagon:
1453 if (CheckHexagonBuiltinFunctionCall(BuiltinID, TheCall))
1454 return ExprError();
1455 break;
1456 case llvm::Triple::mips:
1457 case llvm::Triple::mipsel:
1458 case llvm::Triple::mips64:
1459 case llvm::Triple::mips64el:
1460 if (CheckMipsBuiltinFunctionCall(BuiltinID, TheCall))
1461 return ExprError();
1462 break;
1463 case llvm::Triple::systemz:
1464 if (CheckSystemZBuiltinFunctionCall(BuiltinID, TheCall))
1465 return ExprError();
1466 break;
1467 case llvm::Triple::x86:
1468 case llvm::Triple::x86_64:
1469 if (CheckX86BuiltinFunctionCall(BuiltinID, TheCall))
1470 return ExprError();
1471 break;
1472 case llvm::Triple::ppc:
1473 case llvm::Triple::ppc64:
1474 case llvm::Triple::ppc64le:
1475 if (CheckPPCBuiltinFunctionCall(BuiltinID, TheCall))
1476 return ExprError();
1477 break;
1478 default:
1479 break;
1480 }
1481 }
1482
1483 return TheCallResult;
1484 }
1485
1486 // Get the valid immediate range for the specified NEON type code.
1487 static unsigned RFT(unsigned t, bool shift = false, bool ForceQuad = false) {
1488 NeonTypeFlags Type(t);
1489 int IsQuad = ForceQuad ? true : Type.isQuad();
1490 switch (Type.getEltType()) {
1491 case NeonTypeFlags::Int8:
1492 case NeonTypeFlags::Poly8:
1493 return shift ? 7 : (8 << IsQuad) - 1;
1494 case NeonTypeFlags::Int16:
1495 case NeonTypeFlags::Poly16:
1496 return shift ? 15 : (4 << IsQuad) - 1;
1497 case NeonTypeFlags::Int32:
1498 return shift ? 31 : (2 << IsQuad) - 1;
1499 case NeonTypeFlags::Int64:
1500 case NeonTypeFlags::Poly64:
1501 return shift ? 63 : (1 << IsQuad) - 1;
1502 case NeonTypeFlags::Poly128:
1503 return shift ? 127 : (1 << IsQuad) - 1;
1504 case NeonTypeFlags::Float16:
1505 assert(!shift && "cannot shift float types!");
1506 return (4 << IsQuad) - 1;
1507 case NeonTypeFlags::Float32:
1508 assert(!shift && "cannot shift float types!");
1509 return (2 << IsQuad) - 1;
1510 case NeonTypeFlags::Float64:
1511 assert(!shift && "cannot shift float types!");
1512 return (1 << IsQuad) - 1;
1513 }
1514 llvm_unreachable("Invalid NeonTypeFlag!");
1515 }
1516
1517 /// getNeonEltType - Return the QualType corresponding to the elements of
1518 /// the vector type specified by the NeonTypeFlags. This is used to check
1519 /// the pointer arguments for Neon load/store intrinsics.
1520 static QualType getNeonEltType(NeonTypeFlags Flags, ASTContext &Context,
1521 bool IsPolyUnsigned, bool IsInt64Long) {
1522 switch (Flags.getEltType()) {
1523 case NeonTypeFlags::Int8:
1524 return Flags.isUnsigned() ? Context.UnsignedCharTy : Context.SignedCharTy;
1525 case NeonTypeFlags::Int16:
1526 return Flags.isUnsigned() ? Context.UnsignedShortTy : Context.ShortTy;
1527 case NeonTypeFlags::Int32:
1528 return Flags.isUnsigned() ? Context.UnsignedIntTy : Context.IntTy;
1529 case NeonTypeFlags::Int64:
1530 if (IsInt64Long)
1531 return Flags.isUnsigned() ? Context.UnsignedLongTy : Context.LongTy;
1532 else
1533 return Flags.isUnsigned() ? Context.UnsignedLongLongTy
1534 : Context.LongLongTy;
1535 case NeonTypeFlags::Poly8:
1536 return IsPolyUnsigned ? Context.UnsignedCharTy : Context.SignedCharTy;
1537 case NeonTypeFlags::Poly16:
1538 return IsPolyUnsigned ? Context.UnsignedShortTy : Context.ShortTy;
1539 case NeonTypeFlags::Poly64:
1540 if (IsInt64Long)
1541 return Context.UnsignedLongTy;
1542 else
1543 return Context.UnsignedLongLongTy;
1544 case NeonTypeFlags::Poly128:
1545 break;
1546 case NeonTypeFlags::Float16:
1547 return Context.HalfTy;
1548 case NeonTypeFlags::Float32:
1549 return Context.FloatTy;
1550 case NeonTypeFlags::Float64:
1551 return Context.DoubleTy;
1552 }
1553 llvm_unreachable("Invalid NeonTypeFlag!");
1554 }
1555
1556 bool Sema::CheckNeonBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
1557 llvm::APSInt Result;
1558 uint64_t mask = 0;
1559 unsigned TV = 0;
1560 int PtrArgNum = -1;
1561 bool HasConstPtr = false;
1562 switch (BuiltinID) {
1563 #define GET_NEON_OVERLOAD_CHECK
1564 #include "clang/Basic/arm_neon.inc"
1565 #include "clang/Basic/arm_fp16.inc"
1566 #undef GET_NEON_OVERLOAD_CHECK
1567 }
1568
1569 // For NEON intrinsics which are overloaded on vector element type, validate
1570 // the immediate which specifies which variant to emit.
1571 unsigned ImmArg = TheCall->getNumArgs()-1;
1572 if (mask) {
1573 if (SemaBuiltinConstantArg(TheCall, ImmArg, Result))
1574 return true;
1575
1576 TV = Result.getLimitedValue(64);
1577 if ((TV > 63) || (mask & (1ULL << TV)) == 0)
1578 return Diag(TheCall->getBeginLoc(), diag::err_invalid_neon_type_code)
1579 << TheCall->getArg(ImmArg)->getSourceRange();
1580 }
1581
1582 if (PtrArgNum >= 0) {
1583 // Check that pointer arguments have the specified type.
1584 Expr *Arg = TheCall->getArg(PtrArgNum);
1585 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Arg))
1586 Arg = ICE->getSubExpr();
1587 ExprResult RHS = DefaultFunctionArrayLvalueConversion(Arg);
1588 QualType RHSTy = RHS.get()->getType();
1589
1590 llvm::Triple::ArchType Arch = Context.getTargetInfo().getTriple().getArch();
1591 bool IsPolyUnsigned = Arch == llvm::Triple::aarch64 ||
1592 Arch == llvm::Triple::aarch64_be;
1593 bool IsInt64Long =
1594 Context.getTargetInfo().getInt64Type() == TargetInfo::SignedLong;
1595 QualType EltTy =
1596 getNeonEltType(NeonTypeFlags(TV), Context, IsPolyUnsigned, IsInt64Long);
1597 if (HasConstPtr)
1598 EltTy = EltTy.withConst();
1599 QualType LHSTy = Context.getPointerType(EltTy);
1600 AssignConvertType ConvTy;
1601 ConvTy = CheckSingleAssignmentConstraints(LHSTy, RHS);
1602 if (RHS.isInvalid())
1603 return true;
1604 if (DiagnoseAssignmentResult(ConvTy, Arg->getBeginLoc(), LHSTy, RHSTy,
1605 RHS.get(), AA_Assigning))
1606 return true;
1607 }
1608
1609 // For NEON intrinsics which take an immediate value as part of the
1610 // instruction, range check them here.
1611 unsigned i = 0, l = 0, u = 0;
1612 switch (BuiltinID) {
1613 default:
1614 return false;
1615 #define GET_NEON_IMMEDIATE_CHECK
1616 #include "clang/Basic/arm_neon.inc"
1617 #include "clang/Basic/arm_fp16.inc"
1618 #undef GET_NEON_IMMEDIATE_CHECK
1619 }
1620
1621 return SemaBuiltinConstantArgRange(TheCall, i, l, u + l);
1622 }
1623
1624 bool Sema::CheckARMBuiltinExclusiveCall(unsigned BuiltinID, CallExpr *TheCall,
1625 unsigned MaxWidth) {
1626 assert((BuiltinID == ARM::BI__builtin_arm_ldrex ||
1627 BuiltinID == ARM::BI__builtin_arm_ldaex ||
1628 BuiltinID == ARM::BI__builtin_arm_strex ||
1629 BuiltinID == ARM::BI__builtin_arm_stlex ||
1630 BuiltinID == AArch64::BI__builtin_arm_ldrex ||
1631 BuiltinID == AArch64::BI__builtin_arm_ldaex ||
1632 BuiltinID == AArch64::BI__builtin_arm_strex ||
1633 BuiltinID == AArch64::BI__builtin_arm_stlex) &&
1634 "unexpected ARM builtin");
1635 bool IsLdrex = BuiltinID == ARM::BI__builtin_arm_ldrex ||
1636 BuiltinID == ARM::BI__builtin_arm_ldaex ||
1637 BuiltinID == AArch64::BI__builtin_arm_ldrex ||
1638 BuiltinID == AArch64::BI__builtin_arm_ldaex;
1639
1640 DeclRefExpr *DRE =cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
1641
1642 // Ensure that we have the proper number of arguments.
1643 if (checkArgCount(*this, TheCall, IsLdrex ? 1 : 2))
1644 return true;
1645
1646 // Inspect the pointer argument of the atomic builtin. This should always be
1647 // a pointer type, whose element is an integral scalar or pointer type.
1648 // Because it is a pointer type, we don't have to worry about any implicit
1649 // casts here.
1650 Expr *PointerArg = TheCall->getArg(IsLdrex ? 0 : 1);
1651 ExprResult PointerArgRes = DefaultFunctionArrayLvalueConversion(PointerArg);
1652 if (PointerArgRes.isInvalid())
1653 return true;
1654 PointerArg = PointerArgRes.get();
1655
1656 const PointerType *pointerType = PointerArg->getType()->getAs<PointerType>();
1657 if (!pointerType) {
1658 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer)
1659 << PointerArg->getType() << PointerArg->getSourceRange();
1660 return true;
1661 }
1662
1663 // ldrex takes a "const volatile T*" and strex takes a "volatile T*". Our next
1664 // task is to insert the appropriate casts into the AST. First work out just
1665 // what the appropriate type is.
1666 QualType ValType = pointerType->getPointeeType();
1667 QualType AddrType = ValType.getUnqualifiedType().withVolatile();
1668 if (IsLdrex)
1669 AddrType.addConst();
1670
1671 // Issue a warning if the cast is dodgy.
1672 CastKind CastNeeded = CK_NoOp;
1673 if (!AddrType.isAtLeastAsQualifiedAs(ValType)) {
1674 CastNeeded = CK_BitCast;
1675 Diag(DRE->getBeginLoc(), diag::ext_typecheck_convert_discards_qualifiers)
1676 << PointerArg->getType() << Context.getPointerType(AddrType)
1677 << AA_Passing << PointerArg->getSourceRange();
1678 }
1679
1680 // Finally, do the cast and replace the argument with the corrected version.
1681 AddrType = Context.getPointerType(AddrType);
1682 PointerArgRes = ImpCastExprToType(PointerArg, AddrType, CastNeeded);
1683 if (PointerArgRes.isInvalid())
1684 return true;
1685 PointerArg = PointerArgRes.get();
1686
1687 TheCall->setArg(IsLdrex ? 0 : 1, PointerArg);
1688
1689 // In general, we allow ints, floats and pointers to be loaded and stored.
1690 if (!ValType->isIntegerType() && !ValType->isAnyPointerType() &&
1691 !ValType->isBlockPointerType() && !ValType->isFloatingType()) {
1692 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer_intfltptr)
1693 << PointerArg->getType() << PointerArg->getSourceRange();
1694 return true;
1695 }
1696
1697 // But ARM doesn't have instructions to deal with 128-bit versions.
1698 if (Context.getTypeSize(ValType) > MaxWidth) {
1699 assert(MaxWidth == 64 && "Diagnostic unexpectedly inaccurate");
1700 Diag(DRE->getBeginLoc(), diag::err_atomic_exclusive_builtin_pointer_size)
1701 << PointerArg->getType() << PointerArg->getSourceRange();
1702 return true;
1703 }
1704
1705 switch (ValType.getObjCLifetime()) {
1706 case Qualifiers::OCL_None:
1707 case Qualifiers::OCL_ExplicitNone:
1708 // okay
1709 break;
1710
1711 case Qualifiers::OCL_Weak:
1712 case Qualifiers::OCL_Strong:
1713 case Qualifiers::OCL_Autoreleasing:
1714 Diag(DRE->getBeginLoc(), diag::err_arc_atomic_ownership)
1715 << ValType << PointerArg->getSourceRange();
1716 return true;
1717 }
1718
1719 if (IsLdrex) {
1720 TheCall->setType(ValType);
1721 return false;
1722 }
1723
1724 // Initialize the argument to be stored.
1725 ExprResult ValArg = TheCall->getArg(0);
1726 InitializedEntity Entity = InitializedEntity::InitializeParameter(
1727 Context, ValType, /*consume*/ false);
1728 ValArg = PerformCopyInitialization(Entity, SourceLocation(), ValArg);
1729 if (ValArg.isInvalid())
1730 return true;
1731 TheCall->setArg(0, ValArg.get());
1732
1733 // __builtin_arm_strex always returns an int. It's marked as such in the .def,
1734 // but the custom checker bypasses all default analysis.
1735 TheCall->setType(Context.IntTy);
1736 return false;
1737 }
1738
1739 bool Sema::CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
1740 if (BuiltinID == ARM::BI__builtin_arm_ldrex ||
1741 BuiltinID == ARM::BI__builtin_arm_ldaex ||
1742 BuiltinID == ARM::BI__builtin_arm_strex ||
1743 BuiltinID == ARM::BI__builtin_arm_stlex) {
1744 return CheckARMBuiltinExclusiveCall(BuiltinID, TheCall, 64);
1745 }
1746
1747 if (BuiltinID == ARM::BI__builtin_arm_prefetch) {
1748 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1) ||
1749 SemaBuiltinConstantArgRange(TheCall, 2, 0, 1);
1750 }
1751
1752 if (BuiltinID == ARM::BI__builtin_arm_rsr64 ||
1753 BuiltinID == ARM::BI__builtin_arm_wsr64)
1754 return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 3, false);
1755
1756 if (BuiltinID == ARM::BI__builtin_arm_rsr ||
1757 BuiltinID == ARM::BI__builtin_arm_rsrp ||
1758 BuiltinID == ARM::BI__builtin_arm_wsr ||
1759 BuiltinID == ARM::BI__builtin_arm_wsrp)
1760 return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true);
1761
1762 if (CheckNeonBuiltinFunctionCall(BuiltinID, TheCall))
1763 return true;
1764
1765 // For intrinsics which take an immediate value as part of the instruction,
1766 // range check them here.
1767 // FIXME: VFP Intrinsics should error if VFP not present.
1768 switch (BuiltinID) {
1769 default: return false;
1770 case ARM::BI__builtin_arm_ssat:
1771 return SemaBuiltinConstantArgRange(TheCall, 1, 1, 32);
1772 case ARM::BI__builtin_arm_usat:
1773 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 31);
1774 case ARM::BI__builtin_arm_ssat16:
1775 return SemaBuiltinConstantArgRange(TheCall, 1, 1, 16);
1776 case ARM::BI__builtin_arm_usat16:
1777 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15);
1778 case ARM::BI__builtin_arm_vcvtr_f:
1779 case ARM::BI__builtin_arm_vcvtr_d:
1780 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
1781 case ARM::BI__builtin_arm_dmb:
1782 case ARM::BI__builtin_arm_dsb:
1783 case ARM::BI__builtin_arm_isb:
1784 case ARM::BI__builtin_arm_dbg:
1785 return SemaBuiltinConstantArgRange(TheCall, 0, 0, 15);
1786 }
1787 }
1788
1789 bool Sema::CheckAArch64BuiltinFunctionCall(unsigned BuiltinID,
1790 CallExpr *TheCall) {
1791 if (BuiltinID == AArch64::BI__builtin_arm_ldrex ||
1792 BuiltinID == AArch64::BI__builtin_arm_ldaex ||
1793 BuiltinID == AArch64::BI__builtin_arm_strex ||
1794 BuiltinID == AArch64::BI__builtin_arm_stlex) {
1795 return CheckARMBuiltinExclusiveCall(BuiltinID, TheCall, 128);
1796 }
1797
1798 if (BuiltinID == AArch64::BI__builtin_arm_prefetch) {
1799 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1) ||
1800 SemaBuiltinConstantArgRange(TheCall, 2, 0, 2) ||
1801 SemaBuiltinConstantArgRange(TheCall, 3, 0, 1) ||
1802 SemaBuiltinConstantArgRange(TheCall, 4, 0, 1);
1803 }
1804
1805 if (BuiltinID == AArch64::BI__builtin_arm_rsr64 ||
1806 BuiltinID == AArch64::BI__builtin_arm_wsr64)
1807 return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true);
1808
1809 if (BuiltinID == AArch64::BI__builtin_arm_rsr ||
1810 BuiltinID == AArch64::BI__builtin_arm_rsrp ||
1811 BuiltinID == AArch64::BI__builtin_arm_wsr ||
1812 BuiltinID == AArch64::BI__builtin_arm_wsrp)
1813 return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true);
1814
1815 // Only check the valid encoding range. Any constant in this range would be
1816 // converted to a register of the form S1_2_C3_C4_5. Let the hardware throw
1817 // an exception for incorrect registers. This matches MSVC behavior.
1818 if (BuiltinID == AArch64::BI_ReadStatusReg ||
1819 BuiltinID == AArch64::BI_WriteStatusReg)
1820 return SemaBuiltinConstantArgRange(TheCall, 0, 0, 0x7fff);
1821
1822 if (BuiltinID == AArch64::BI__getReg)
1823 return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31);
1824
1825 if (CheckNeonBuiltinFunctionCall(BuiltinID, TheCall))
1826 return true;
1827
1828 // For intrinsics which take an immediate value as part of the instruction,
1829 // range check them here.
1830 unsigned i = 0, l = 0, u = 0;
1831 switch (BuiltinID) {
1832 default: return false;
1833 case AArch64::BI__builtin_arm_dmb:
1834 case AArch64::BI__builtin_arm_dsb:
1835 case AArch64::BI__builtin_arm_isb: l = 0; u = 15; break;
1836 }
1837
1838 return SemaBuiltinConstantArgRange(TheCall, i, l, u + l);
1839 }
1840
1841 bool Sema::CheckHexagonBuiltinCpu(unsigned BuiltinID, CallExpr *TheCall) {
1842 struct BuiltinAndString {
1843 unsigned BuiltinID;
1844 const char *Str;
1845 };
1846
1847 static BuiltinAndString ValidCPU[] = {
1848 { Hexagon::BI__builtin_HEXAGON_A6_vcmpbeq_notany, "v65,v66" },
1849 { Hexagon::BI__builtin_HEXAGON_A6_vminub_RdP, "v62,v65,v66" },
1850 { Hexagon::BI__builtin_HEXAGON_F2_dfadd, "v66" },
1851 { Hexagon::BI__builtin_HEXAGON_F2_dfsub, "v66" },
1852 { Hexagon::BI__builtin_HEXAGON_M2_mnaci, "v66" },
1853 { Hexagon::BI__builtin_HEXAGON_M6_vabsdiffb, "v62,v65,v66" },
1854 { Hexagon::BI__builtin_HEXAGON_M6_vabsdiffub, "v62,v65,v66" },
1855 { Hexagon::BI__builtin_HEXAGON_S2_mask, "v66" },
1856 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_acc, "v60,v62,v65,v66" },
1857 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_and, "v60,v62,v65,v66" },
1858 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_nac, "v60,v62,v65,v66" },
1859 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_or, "v60,v62,v65,v66" },
1860 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p, "v60,v62,v65,v66" },
1861 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_xacc, "v60,v62,v65,v66" },
1862 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_acc, "v60,v62,v65,v66" },
1863 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_and, "v60,v62,v65,v66" },
1864 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_nac, "v60,v62,v65,v66" },
1865 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_or, "v60,v62,v65,v66" },
1866 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r, "v60,v62,v65,v66" },
1867 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_xacc, "v60,v62,v65,v66" },
1868 { Hexagon::BI__builtin_HEXAGON_S6_vsplatrbp, "v62,v65,v66" },
1869 { Hexagon::BI__builtin_HEXAGON_S6_vtrunehb_ppp, "v62,v65,v66" },
1870 { Hexagon::BI__builtin_HEXAGON_S6_vtrunohb_ppp, "v62,v65,v66" },
1871 };
1872
1873 static BuiltinAndString ValidHVX[] = {
1874 { Hexagon::BI__builtin_HEXAGON_V6_hi, "v60,v62,v65,v66" },
1875 { Hexagon::BI__builtin_HEXAGON_V6_hi_128B, "v60,v62,v65,v66" },
1876 { Hexagon::BI__builtin_HEXAGON_V6_lo, "v60,v62,v65,v66" },
1877 { Hexagon::BI__builtin_HEXAGON_V6_lo_128B, "v60,v62,v65,v66" },
1878 { Hexagon::BI__builtin_HEXAGON_V6_extractw, "v60,v62,v65,v66" },
1879 { Hexagon::BI__builtin_HEXAGON_V6_extractw_128B, "v60,v62,v65,v66" },
1880 { Hexagon::BI__builtin_HEXAGON_V6_lvsplatb, "v62,v65,v66" },
1881 { Hexagon::BI__builtin_HEXAGON_V6_lvsplatb_128B, "v62,v65,v66" },
1882 { Hexagon::BI__builtin_HEXAGON_V6_lvsplath, "v62,v65,v66" },
1883 { Hexagon::BI__builtin_HEXAGON_V6_lvsplath_128B, "v62,v65,v66" },
1884 { Hexagon::BI__builtin_HEXAGON_V6_lvsplatw, "v60,v62,v65,v66" },
1885 { Hexagon::BI__builtin_HEXAGON_V6_lvsplatw_128B, "v60,v62,v65,v66" },
1886 { Hexagon::BI__builtin_HEXAGON_V6_pred_and, "v60,v62,v65,v66" },
1887 { Hexagon::BI__builtin_HEXAGON_V6_pred_and_128B, "v60,v62,v65,v66" },
1888 { Hexagon::BI__builtin_HEXAGON_V6_pred_and_n, "v60,v62,v65,v66" },
1889 { Hexagon::BI__builtin_HEXAGON_V6_pred_and_n_128B, "v60,v62,v65,v66" },
1890 { Hexagon::BI__builtin_HEXAGON_V6_pred_not, "v60,v62,v65,v66" },
1891 { Hexagon::BI__builtin_HEXAGON_V6_pred_not_128B, "v60,v62,v65,v66" },
1892 { Hexagon::BI__builtin_HEXAGON_V6_pred_or, "v60,v62,v65,v66" },
1893 { Hexagon::BI__builtin_HEXAGON_V6_pred_or_128B, "v60,v62,v65,v66" },
1894 { Hexagon::BI__builtin_HEXAGON_V6_pred_or_n, "v60,v62,v65,v66" },
1895 { Hexagon::BI__builtin_HEXAGON_V6_pred_or_n_128B, "v60,v62,v65,v66" },
1896 { Hexagon::BI__builtin_HEXAGON_V6_pred_scalar2, "v60,v62,v65,v66" },
1897 { Hexagon::BI__builtin_HEXAGON_V6_pred_scalar2_128B, "v60,v62,v65,v66" },
1898 { Hexagon::BI__builtin_HEXAGON_V6_pred_scalar2v2, "v62,v65,v66" },
1899 { Hexagon::BI__builtin_HEXAGON_V6_pred_scalar2v2_128B, "v62,v65,v66" },
1900 { Hexagon::BI__builtin_HEXAGON_V6_pred_xor, "v60,v62,v65,v66" },
1901 { Hexagon::BI__builtin_HEXAGON_V6_pred_xor_128B, "v60,v62,v65,v66" },
1902 { Hexagon::BI__builtin_HEXAGON_V6_shuffeqh, "v62,v65,v66" },
1903 { Hexagon::BI__builtin_HEXAGON_V6_shuffeqh_128B, "v62,v65,v66" },
1904 { Hexagon::BI__builtin_HEXAGON_V6_shuffeqw, "v62,v65,v66" },
1905 { Hexagon::BI__builtin_HEXAGON_V6_shuffeqw_128B, "v62,v65,v66" },
1906 { Hexagon::BI__builtin_HEXAGON_V6_vabsb, "v65,v66" },
1907 { Hexagon::BI__builtin_HEXAGON_V6_vabsb_128B, "v65,v66" },
1908 { Hexagon::BI__builtin_HEXAGON_V6_vabsb_sat, "v65,v66" },
1909 { Hexagon::BI__builtin_HEXAGON_V6_vabsb_sat_128B, "v65,v66" },
1910 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffh, "v60,v62,v65,v66" },
1911 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffh_128B, "v60,v62,v65,v66" },
1912 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffub, "v60,v62,v65,v66" },
1913 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffub_128B, "v60,v62,v65,v66" },
1914 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffuh, "v60,v62,v65,v66" },
1915 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffuh_128B, "v60,v62,v65,v66" },
1916 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffw, "v60,v62,v65,v66" },
1917 { Hexagon::BI__builtin_HEXAGON_V6_vabsdiffw_128B, "v60,v62,v65,v66" },
1918 { Hexagon::BI__builtin_HEXAGON_V6_vabsh, "v60,v62,v65,v66" },
1919 { Hexagon::BI__builtin_HEXAGON_V6_vabsh_128B, "v60,v62,v65,v66" },
1920 { Hexagon::BI__builtin_HEXAGON_V6_vabsh_sat, "v60,v62,v65,v66" },
1921 { Hexagon::BI__builtin_HEXAGON_V6_vabsh_sat_128B, "v60,v62,v65,v66" },
1922 { Hexagon::BI__builtin_HEXAGON_V6_vabsw, "v60,v62,v65,v66" },
1923 { Hexagon::BI__builtin_HEXAGON_V6_vabsw_128B, "v60,v62,v65,v66" },
1924 { Hexagon::BI__builtin_HEXAGON_V6_vabsw_sat, "v60,v62,v65,v66" },
1925 { Hexagon::BI__builtin_HEXAGON_V6_vabsw_sat_128B, "v60,v62,v65,v66" },
1926 { Hexagon::BI__builtin_HEXAGON_V6_vaddb, "v60,v62,v65,v66" },
1927 { Hexagon::BI__builtin_HEXAGON_V6_vaddb_128B, "v60,v62,v65,v66" },
1928 { Hexagon::BI__builtin_HEXAGON_V6_vaddb_dv, "v60,v62,v65,v66" },
1929 { Hexagon::BI__builtin_HEXAGON_V6_vaddb_dv_128B, "v60,v62,v65,v66" },
1930 { Hexagon::BI__builtin_HEXAGON_V6_vaddbsat, "v62,v65,v66" },
1931 { Hexagon::BI__builtin_HEXAGON_V6_vaddbsat_128B, "v62,v65,v66" },
1932 { Hexagon::BI__builtin_HEXAGON_V6_vaddbsat_dv, "v62,v65,v66" },
1933 { Hexagon::BI__builtin_HEXAGON_V6_vaddbsat_dv_128B, "v62,v65,v66" },
1934 { Hexagon::BI__builtin_HEXAGON_V6_vaddcarry, "v62,v65,v66" },
1935 { Hexagon::BI__builtin_HEXAGON_V6_vaddcarry_128B, "v62,v65,v66" },
1936 { Hexagon::BI__builtin_HEXAGON_V6_vaddcarrysat, "v66" },
1937 { Hexagon::BI__builtin_HEXAGON_V6_vaddcarrysat_128B, "v66" },
1938 { Hexagon::BI__builtin_HEXAGON_V6_vaddclbh, "v62,v65,v66" },
1939 { Hexagon::BI__builtin_HEXAGON_V6_vaddclbh_128B, "v62,v65,v66" },
1940 { Hexagon::BI__builtin_HEXAGON_V6_vaddclbw, "v62,v65,v66" },
1941 { Hexagon::BI__builtin_HEXAGON_V6_vaddclbw_128B, "v62,v65,v66" },
1942 { Hexagon::BI__builtin_HEXAGON_V6_vaddh, "v60,v62,v65,v66" },
1943 { Hexagon::BI__builtin_HEXAGON_V6_vaddh_128B, "v60,v62,v65,v66" },
1944 { Hexagon::BI__builtin_HEXAGON_V6_vaddh_dv, "v60,v62,v65,v66" },
1945 { Hexagon::BI__builtin_HEXAGON_V6_vaddh_dv_128B, "v60,v62,v65,v66" },
1946 { Hexagon::BI__builtin_HEXAGON_V6_vaddhsat, "v60,v62,v65,v66" },
1947 { Hexagon::BI__builtin_HEXAGON_V6_vaddhsat_128B, "v60,v62,v65,v66" },
1948 { Hexagon::BI__builtin_HEXAGON_V6_vaddhsat_dv, "v60,v62,v65,v66" },
1949 { Hexagon::BI__builtin_HEXAGON_V6_vaddhsat_dv_128B, "v60,v62,v65,v66" },
1950 { Hexagon::BI__builtin_HEXAGON_V6_vaddhw, "v60,v62,v65,v66" },
1951 { Hexagon::BI__builtin_HEXAGON_V6_vaddhw_128B, "v60,v62,v65,v66" },
1952 { Hexagon::BI__builtin_HEXAGON_V6_vaddhw_acc, "v62,v65,v66" },
1953 { Hexagon::BI__builtin_HEXAGON_V6_vaddhw_acc_128B, "v62,v65,v66" },
1954 { Hexagon::BI__builtin_HEXAGON_V6_vaddubh, "v60,v62,v65,v66" },
1955 { Hexagon::BI__builtin_HEXAGON_V6_vaddubh_128B, "v60,v62,v65,v66" },
1956 { Hexagon::BI__builtin_HEXAGON_V6_vaddubh_acc, "v62,v65,v66" },
1957 { Hexagon::BI__builtin_HEXAGON_V6_vaddubh_acc_128B, "v62,v65,v66" },
1958 { Hexagon::BI__builtin_HEXAGON_V6_vaddubsat, "v60,v62,v65,v66" },
1959 { Hexagon::BI__builtin_HEXAGON_V6_vaddubsat_128B, "v60,v62,v65,v66" },
1960 { Hexagon::BI__builtin_HEXAGON_V6_vaddubsat_dv, "v60,v62,v65,v66" },
1961 { Hexagon::BI__builtin_HEXAGON_V6_vaddubsat_dv_128B, "v60,v62,v65,v66" },
1962 { Hexagon::BI__builtin_HEXAGON_V6_vaddububb_sat, "v62,v65,v66" },
1963 { Hexagon::BI__builtin_HEXAGON_V6_vaddububb_sat_128B, "v62,v65,v66" },
1964 { Hexagon::BI__builtin_HEXAGON_V6_vadduhsat, "v60,v62,v65,v66" },
1965 { Hexagon::BI__builtin_HEXAGON_V6_vadduhsat_128B, "v60,v62,v65,v66" },
1966 { Hexagon::BI__builtin_HEXAGON_V6_vadduhsat_dv, "v60,v62,v65,v66" },
1967 { Hexagon::BI__builtin_HEXAGON_V6_vadduhsat_dv_128B, "v60,v62,v65,v66" },
1968 { Hexagon::BI__builtin_HEXAGON_V6_vadduhw, "v60,v62,v65,v66" },
1969 { Hexagon::BI__builtin_HEXAGON_V6_vadduhw_128B, "v60,v62,v65,v66" },
1970 { Hexagon::BI__builtin_HEXAGON_V6_vadduhw_acc, "v62,v65,v66" },
1971 { Hexagon::BI__builtin_HEXAGON_V6_vadduhw_acc_128B, "v62,v65,v66" },
1972 { Hexagon::BI__builtin_HEXAGON_V6_vadduwsat, "v62,v65,v66" },
1973 { Hexagon::BI__builtin_HEXAGON_V6_vadduwsat_128B, "v62,v65,v66" },
1974 { Hexagon::BI__builtin_HEXAGON_V6_vadduwsat_dv, "v62,v65,v66" },
1975 { Hexagon::BI__builtin_HEXAGON_V6_vadduwsat_dv_128B, "v62,v65,v66" },
1976 { Hexagon::BI__builtin_HEXAGON_V6_vaddw, "v60,v62,v65,v66" },
1977 { Hexagon::BI__builtin_HEXAGON_V6_vaddw_128B, "v60,v62,v65,v66" },
1978 { Hexagon::BI__builtin_HEXAGON_V6_vaddw_dv, "v60,v62,v65,v66" },
1979 { Hexagon::BI__builtin_HEXAGON_V6_vaddw_dv_128B, "v60,v62,v65,v66" },
1980 { Hexagon::BI__builtin_HEXAGON_V6_vaddwsat, "v60,v62,v65,v66" },
1981 { Hexagon::BI__builtin_HEXAGON_V6_vaddwsat_128B, "v60,v62,v65,v66" },
1982 { Hexagon::BI__builtin_HEXAGON_V6_vaddwsat_dv, "v60,v62,v65,v66" },
1983 { Hexagon::BI__builtin_HEXAGON_V6_vaddwsat_dv_128B, "v60,v62,v65,v66" },
1984 { Hexagon::BI__builtin_HEXAGON_V6_valignb, "v60,v62,v65,v66" },
1985 { Hexagon::BI__builtin_HEXAGON_V6_valignb_128B, "v60,v62,v65,v66" },
1986 { Hexagon::BI__builtin_HEXAGON_V6_valignbi, "v60,v62,v65,v66" },
1987 { Hexagon::BI__builtin_HEXAGON_V6_valignbi_128B, "v60,v62,v65,v66" },
1988 { Hexagon::BI__builtin_HEXAGON_V6_vand, "v60,v62,v65,v66" },
1989 { Hexagon::BI__builtin_HEXAGON_V6_vand_128B, "v60,v62,v65,v66" },
1990 { Hexagon::BI__builtin_HEXAGON_V6_vandnqrt, "v62,v65,v66" },
1991 { Hexagon::BI__builtin_HEXAGON_V6_vandnqrt_128B, "v62,v65,v66" },
1992 { Hexagon::BI__builtin_HEXAGON_V6_vandnqrt_acc, "v62,v65,v66" },
1993 { Hexagon::BI__builtin_HEXAGON_V6_vandnqrt_acc_128B, "v62,v65,v66" },
1994 { Hexagon::BI__builtin_HEXAGON_V6_vandqrt, "v60,v62,v65,v66" },
1995 { Hexagon::BI__builtin_HEXAGON_V6_vandqrt_128B, "v60,v62,v65,v66" },
1996 { Hexagon::BI__builtin_HEXAGON_V6_vandqrt_acc, "v60,v62,v65,v66" },
1997 { Hexagon::BI__builtin_HEXAGON_V6_vandqrt_acc_128B, "v60,v62,v65,v66" },
1998 { Hexagon::BI__builtin_HEXAGON_V6_vandvnqv, "v62,v65,v66" },
1999 { Hexagon::BI__builtin_HEXAGON_V6_vandvnqv_128B, "v62,v65,v66" },
2000 { Hexagon::BI__builtin_HEXAGON_V6_vandvqv, "v62,v65,v66" },
2001 { Hexagon::BI__builtin_HEXAGON_V6_vandvqv_128B, "v62,v65,v66" },
2002 { Hexagon::BI__builtin_HEXAGON_V6_vandvrt, "v60,v62,v65,v66" },
2003 { Hexagon::BI__builtin_HEXAGON_V6_vandvrt_128B, "v60,v62,v65,v66" },
2004 { Hexagon::BI__builtin_HEXAGON_V6_vandvrt_acc, "v60,v62,v65,v66" },
2005 { Hexagon::BI__builtin_HEXAGON_V6_vandvrt_acc_128B, "v60,v62,v65,v66" },
2006 { Hexagon::BI__builtin_HEXAGON_V6_vaslh, "v60,v62,v65,v66" },
2007 { Hexagon::BI__builtin_HEXAGON_V6_vaslh_128B, "v60,v62,v65,v66" },
2008 { Hexagon::BI__builtin_HEXAGON_V6_vaslh_acc, "v65,v66" },
2009 { Hexagon::BI__builtin_HEXAGON_V6_vaslh_acc_128B, "v65,v66" },
2010 { Hexagon::BI__builtin_HEXAGON_V6_vaslhv, "v60,v62,v65,v66" },
2011 { Hexagon::BI__builtin_HEXAGON_V6_vaslhv_128B, "v60,v62,v65,v66" },
2012 { Hexagon::BI__builtin_HEXAGON_V6_vaslw, "v60,v62,v65,v66" },
2013 { Hexagon::BI__builtin_HEXAGON_V6_vaslw_128B, "v60,v62,v65,v66" },
2014 { Hexagon::BI__builtin_HEXAGON_V6_vaslw_acc, "v60,v62,v65,v66" },
2015 { Hexagon::BI__builtin_HEXAGON_V6_vaslw_acc_128B, "v60,v62,v65,v66" },
2016 { Hexagon::BI__builtin_HEXAGON_V6_vaslwv, "v60,v62,v65,v66" },
2017 { Hexagon::BI__builtin_HEXAGON_V6_vaslwv_128B, "v60,v62,v65,v66" },
2018 { Hexagon::BI__builtin_HEXAGON_V6_vasrh, "v60,v62,v65,v66" },
2019 { Hexagon::BI__builtin_HEXAGON_V6_vasrh_128B, "v60,v62,v65,v66" },
2020 { Hexagon::BI__builtin_HEXAGON_V6_vasrh_acc, "v65,v66" },
2021 { Hexagon::BI__builtin_HEXAGON_V6_vasrh_acc_128B, "v65,v66" },
2022 { Hexagon::BI__builtin_HEXAGON_V6_vasrhbrndsat, "v60,v62,v65,v66" },
2023 { Hexagon::BI__builtin_HEXAGON_V6_vasrhbrndsat_128B, "v60,v62,v65,v66" },
2024 { Hexagon::BI__builtin_HEXAGON_V6_vasrhbsat, "v62,v65,v66" },
2025 { Hexagon::BI__builtin_HEXAGON_V6_vasrhbsat_128B, "v62,v65,v66" },
2026 { Hexagon::BI__builtin_HEXAGON_V6_vasrhubrndsat, "v60,v62,v65,v66" },
2027 { Hexagon::BI__builtin_HEXAGON_V6_vasrhubrndsat_128B, "v60,v62,v65,v66" },
2028 { Hexagon::BI__builtin_HEXAGON_V6_vasrhubsat, "v60,v62,v65,v66" },
2029 { Hexagon::BI__builtin_HEXAGON_V6_vasrhubsat_128B, "v60,v62,v65,v66" },
2030 { Hexagon::BI__builtin_HEXAGON_V6_vasrhv, "v60,v62,v65,v66" },
2031 { Hexagon::BI__builtin_HEXAGON_V6_vasrhv_128B, "v60,v62,v65,v66" },
2032 { Hexagon::BI__builtin_HEXAGON_V6_vasr_into, "v66" },
2033 { Hexagon::BI__builtin_HEXAGON_V6_vasr_into_128B, "v66" },
2034 { Hexagon::BI__builtin_HEXAGON_V6_vasruhubrndsat, "v65,v66" },
2035 { Hexagon::BI__builtin_HEXAGON_V6_vasruhubrndsat_128B, "v65,v66" },
2036 { Hexagon::BI__builtin_HEXAGON_V6_vasruhubsat, "v65,v66" },
2037 { Hexagon::BI__builtin_HEXAGON_V6_vasruhubsat_128B, "v65,v66" },
2038 { Hexagon::BI__builtin_HEXAGON_V6_vasruwuhrndsat, "v62,v65,v66" },
2039 { Hexagon::BI__builtin_HEXAGON_V6_vasruwuhrndsat_128B, "v62,v65,v66" },
2040 { Hexagon::BI__builtin_HEXAGON_V6_vasruwuhsat, "v65,v66" },
2041 { Hexagon::BI__builtin_HEXAGON_V6_vasruwuhsat_128B, "v65,v66" },
2042 { Hexagon::BI__builtin_HEXAGON_V6_vasrw, "v60,v62,v65,v66" },
2043 { Hexagon::BI__builtin_HEXAGON_V6_vasrw_128B, "v60,v62,v65,v66" },
2044 { Hexagon::BI__builtin_HEXAGON_V6_vasrw_acc, "v60,v62,v65,v66" },
2045 { Hexagon::BI__builtin_HEXAGON_V6_vasrw_acc_128B, "v60,v62,v65,v66" },
2046 { Hexagon::BI__builtin_HEXAGON_V6_vasrwh, "v60,v62,v65,v66" },
2047 { Hexagon::BI__builtin_HEXAGON_V6_vasrwh_128B, "v60,v62,v65,v66" },
2048 { Hexagon::BI__builtin_HEXAGON_V6_vasrwhrndsat, "v60,v62,v65,v66" },
2049 { Hexagon::BI__builtin_HEXAGON_V6_vasrwhrndsat_128B, "v60,v62,v65,v66" },
2050 { Hexagon::BI__builtin_HEXAGON_V6_vasrwhsat, "v60,v62,v65,v66" },
2051 { Hexagon::BI__builtin_HEXAGON_V6_vasrwhsat_128B, "v60,v62,v65,v66" },
2052 { Hexagon::BI__builtin_HEXAGON_V6_vasrwuhrndsat, "v62,v65,v66" },
2053 { Hexagon::BI__builtin_HEXAGON_V6_vasrwuhrndsat_128B, "v62,v65,v66" },
2054 { Hexagon::BI__builtin_HEXAGON_V6_vasrwuhsat, "v60,v62,v65,v66" },
2055 { Hexagon::BI__builtin_HEXAGON_V6_vasrwuhsat_128B, "v60,v62,v65,v66" },
2056 { Hexagon::BI__builtin_HEXAGON_V6_vasrwv, "v60,v62,v65,v66" },
2057 { Hexagon::BI__builtin_HEXAGON_V6_vasrwv_128B, "v60,v62,v65,v66" },
2058 { Hexagon::BI__builtin_HEXAGON_V6_vassign, "v60,v62,v65,v66" },
2059 { Hexagon::BI__builtin_HEXAGON_V6_vassign_128B, "v60,v62,v65,v66" },
2060 { Hexagon::BI__builtin_HEXAGON_V6_vassignp, "v60,v62,v65,v66" },
2061 { Hexagon::BI__builtin_HEXAGON_V6_vassignp_128B, "v60,v62,v65,v66" },
2062 { Hexagon::BI__builtin_HEXAGON_V6_vavgb, "v65,v66" },
2063 { Hexagon::BI__builtin_HEXAGON_V6_vavgb_128B, "v65,v66" },
2064 { Hexagon::BI__builtin_HEXAGON_V6_vavgbrnd, "v65,v66" },
2065 { Hexagon::BI__builtin_HEXAGON_V6_vavgbrnd_128B, "v65,v66" },
2066 { Hexagon::BI__builtin_HEXAGON_V6_vavgh, "v60,v62,v65,v66" },
2067 { Hexagon::BI__builtin_HEXAGON_V6_vavgh_128B, "v60,v62,v65,v66" },
2068 { Hexagon::BI__builtin_HEXAGON_V6_vavghrnd, "v60,v62,v65,v66" },
2069 { Hexagon::BI__builtin_HEXAGON_V6_vavghrnd_128B, "v60,v62,v65,v66" },
2070 { Hexagon::BI__builtin_HEXAGON_V6_vavgub, "v60,v62,v65,v66" },
2071 { Hexagon::BI__builtin_HEXAGON_V6_vavgub_128B, "v60,v62,v65,v66" },
2072 { Hexagon::BI__builtin_HEXAGON_V6_vavgubrnd, "v60,v62,v65,v66" },
2073 { Hexagon::BI__builtin_HEXAGON_V6_vavgubrnd_128B, "v60,v62,v65,v66" },
2074 { Hexagon::BI__builtin_HEXAGON_V6_vavguh, "v60,v62,v65,v66" },
2075 { Hexagon::BI__builtin_HEXAGON_V6_vavguh_128B, "v60,v62,v65,v66" },
2076 { Hexagon::BI__builtin_HEXAGON_V6_vavguhrnd, "v60,v62,v65,v66" },
2077 { Hexagon::BI__builtin_HEXAGON_V6_vavguhrnd_128B, "v60,v62,v65,v66" },
2078 { Hexagon::BI__builtin_HEXAGON_V6_vavguw, "v65,v66" },
2079 { Hexagon::BI__builtin_HEXAGON_V6_vavguw_128B, "v65,v66" },
2080 { Hexagon::BI__builtin_HEXAGON_V6_vavguwrnd, "v65,v66" },
2081 { Hexagon::BI__builtin_HEXAGON_V6_vavguwrnd_128B, "v65,v66" },
2082 { Hexagon::BI__builtin_HEXAGON_V6_vavgw, "v60,v62,v65,v66" },
2083 { Hexagon::BI__builtin_HEXAGON_V6_vavgw_128B, "v60,v62,v65,v66" },
2084 { Hexagon::BI__builtin_HEXAGON_V6_vavgwrnd, "v60,v62,v65,v66" },
2085 { Hexagon::BI__builtin_HEXAGON_V6_vavgwrnd_128B, "v60,v62,v65,v66" },
2086 { Hexagon::BI__builtin_HEXAGON_V6_vcl0h, "v60,v62,v65,v66" },
2087 { Hexagon::BI__builtin_HEXAGON_V6_vcl0h_128B, "v60,v62,v65,v66" },
2088 { Hexagon::BI__builtin_HEXAGON_V6_vcl0w, "v60,v62,v65,v66" },
2089 { Hexagon::BI__builtin_HEXAGON_V6_vcl0w_128B, "v60,v62,v65,v66" },
2090 { Hexagon::BI__builtin_HEXAGON_V6_vcombine, "v60,v62,v65,v66" },
2091 { Hexagon::BI__builtin_HEXAGON_V6_vcombine_128B, "v60,v62,v65,v66" },
2092 { Hexagon::BI__builtin_HEXAGON_V6_vd0, "v60,v62,v65,v66" },
2093 { Hexagon::BI__builtin_HEXAGON_V6_vd0_128B, "v60,v62,v65,v66" },
2094 { Hexagon::BI__builtin_HEXAGON_V6_vdd0, "v65,v66" },
2095 { Hexagon::BI__builtin_HEXAGON_V6_vdd0_128B, "v65,v66" },
2096 { Hexagon::BI__builtin_HEXAGON_V6_vdealb, "v60,v62,v65,v66" },
2097 { Hexagon::BI__builtin_HEXAGON_V6_vdealb_128B, "v60,v62,v65,v66" },
2098 { Hexagon::BI__builtin_HEXAGON_V6_vdealb4w, "v60,v62,v65,v66" },
2099 { Hexagon::BI__builtin_HEXAGON_V6_vdealb4w_128B, "v60,v62,v65,v66" },
2100 { Hexagon::BI__builtin_HEXAGON_V6_vdealh, "v60,v62,v65,v66" },
2101 { Hexagon::BI__builtin_HEXAGON_V6_vdealh_128B, "v60,v62,v65,v66" },
2102 { Hexagon::BI__builtin_HEXAGON_V6_vdealvdd, "v60,v62,v65,v66" },
2103 { Hexagon::BI__builtin_HEXAGON_V6_vdealvdd_128B, "v60,v62,v65,v66" },
2104 { Hexagon::BI__builtin_HEXAGON_V6_vdelta, "v60,v62,v65,v66" },
2105 { Hexagon::BI__builtin_HEXAGON_V6_vdelta_128B, "v60,v62,v65,v66" },
2106 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus, "v60,v62,v65,v66" },
2107 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_128B, "v60,v62,v65,v66" },
2108 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_acc, "v60,v62,v65,v66" },
2109 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_acc_128B, "v60,v62,v65,v66" },
2110 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_dv, "v60,v62,v65,v66" },
2111 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_dv_128B, "v60,v62,v65,v66" },
2112 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_dv_acc, "v60,v62,v65,v66" },
2113 { Hexagon::BI__builtin_HEXAGON_V6_vdmpybus_dv_acc_128B, "v60,v62,v65,v66" },
2114 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb, "v60,v62,v65,v66" },
2115 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_128B, "v60,v62,v65,v66" },
2116 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_acc, "v60,v62,v65,v66" },
2117 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_acc_128B, "v60,v62,v65,v66" },
2118 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_dv, "v60,v62,v65,v66" },
2119 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_dv_128B, "v60,v62,v65,v66" },
2120 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_dv_acc, "v60,v62,v65,v66" },
2121 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhb_dv_acc_128B, "v60,v62,v65,v66" },
2122 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhisat, "v60,v62,v65,v66" },
2123 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhisat_128B, "v60,v62,v65,v66" },
2124 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhisat_acc, "v60,v62,v65,v66" },
2125 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhisat_acc_128B, "v60,v62,v65,v66" },
2126 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsat, "v60,v62,v65,v66" },
2127 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsat_128B, "v60,v62,v65,v66" },
2128 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsat_acc, "v60,v62,v65,v66" },
2129 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsat_acc_128B, "v60,v62,v65,v66" },
2130 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsuisat, "v60,v62,v65,v66" },
2131 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsuisat_128B, "v60,v62,v65,v66" },
2132 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsuisat_acc, "v60,v62,v65,v66" },
2133 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsuisat_acc_128B, "v60,v62,v65,v66" },
2134 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsusat, "v60,v62,v65,v66" },
2135 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsusat_128B, "v60,v62,v65,v66" },
2136 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsusat_acc, "v60,v62,v65,v66" },
2137 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhsusat_acc_128B, "v60,v62,v65,v66" },
2138 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhvsat, "v60,v62,v65,v66" },
2139 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhvsat_128B, "v60,v62,v65,v66" },
2140 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhvsat_acc, "v60,v62,v65,v66" },
2141 { Hexagon::BI__builtin_HEXAGON_V6_vdmpyhvsat_acc_128B, "v60,v62,v65,v66" },
2142 { Hexagon::BI__builtin_HEXAGON_V6_vdsaduh, "v60,v62,v65,v66" },
2143 { Hexagon::BI__builtin_HEXAGON_V6_vdsaduh_128B, "v60,v62,v65,v66" },
2144 { Hexagon::BI__builtin_HEXAGON_V6_vdsaduh_acc, "v60,v62,v65,v66" },
2145 { Hexagon::BI__builtin_HEXAGON_V6_vdsaduh_acc_128B, "v60,v62,v65,v66" },
2146 { Hexagon::BI__builtin_HEXAGON_V6_veqb, "v60,v62,v65,v66" },
2147 { Hexagon::BI__builtin_HEXAGON_V6_veqb_128B, "v60,v62,v65,v66" },
2148 { Hexagon::BI__builtin_HEXAGON_V6_veqb_and, "v60,v62,v65,v66" },
2149 { Hexagon::BI__builtin_HEXAGON_V6_veqb_and_128B, "v60,v62,v65,v66" },
2150 { Hexagon::BI__builtin_HEXAGON_V6_veqb_or, "v60,v62,v65,v66" },
2151 { Hexagon::BI__builtin_HEXAGON_V6_veqb_or_128B, "v60,v62,v65,v66" },
2152 { Hexagon::BI__builtin_HEXAGON_V6_veqb_xor, "v60,v62,v65,v66" },
2153 { Hexagon::BI__builtin_HEXAGON_V6_veqb_xor_128B, "v60,v62,v65,v66" },
2154 { Hexagon::BI__builtin_HEXAGON_V6_veqh, "v60,v62,v65,v66" },
2155 { Hexagon::BI__builtin_HEXAGON_V6_veqh_128B, "v60,v62,v65,v66" },
2156 { Hexagon::BI__builtin_HEXAGON_V6_veqh_and, "v60,v62,v65,v66" },
2157 { Hexagon::BI__builtin_HEXAGON_V6_veqh_and_128B, "v60,v62,v65,v66" },
2158 { Hexagon::BI__builtin_HEXAGON_V6_veqh_or, "v60,v62,v65,v66" },
2159 { Hexagon::BI__builtin_HEXAGON_V6_veqh_or_128B, "v60,v62,v65,v66" },
2160 { Hexagon::BI__builtin_HEXAGON_V6_veqh_xor, "v60,v62,v65,v66" },
2161 { Hexagon::BI__builtin_HEXAGON_V6_veqh_xor_128B, "v60,v62,v65,v66" },
2162 { Hexagon::BI__builtin_HEXAGON_V6_veqw, "v60,v62,v65,v66" },
2163 { Hexagon::BI__builtin_HEXAGON_V6_veqw_128B, "v60,v62,v65,v66" },
2164 { Hexagon::BI__builtin_HEXAGON_V6_veqw_and, "v60,v62,v65,v66" },
2165 { Hexagon::BI__builtin_HEXAGON_V6_veqw_and_128B, "v60,v62,v65,v66" },
2166 { Hexagon::BI__builtin_HEXAGON_V6_veqw_or, "v60,v62,v65,v66" },
2167 { Hexagon::BI__builtin_HEXAGON_V6_veqw_or_128B, "v60,v62,v65,v66" },
2168 { Hexagon::BI__builtin_HEXAGON_V6_veqw_xor, "v60,v62,v65,v66" },
2169 { Hexagon::BI__builtin_HEXAGON_V6_veqw_xor_128B, "v60,v62,v65,v66" },
2170 { Hexagon::BI__builtin_HEXAGON_V6_vgtb, "v60,v62,v65,v66" },
2171 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_128B, "v60,v62,v65,v66" },
2172 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_and, "v60,v62,v65,v66" },
2173 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_and_128B, "v60,v62,v65,v66" },
2174 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_or, "v60,v62,v65,v66" },
2175 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_or_128B, "v60,v62,v65,v66" },
2176 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_xor, "v60,v62,v65,v66" },
2177 { Hexagon::BI__builtin_HEXAGON_V6_vgtb_xor_128B, "v60,v62,v65,v66" },
2178 { Hexagon::BI__builtin_HEXAGON_V6_vgth, "v60,v62,v65,v66" },
2179 { Hexagon::BI__builtin_HEXAGON_V6_vgth_128B, "v60,v62,v65,v66" },
2180 { Hexagon::BI__builtin_HEXAGON_V6_vgth_and, "v60,v62,v65,v66" },
2181 { Hexagon::BI__builtin_HEXAGON_V6_vgth_and_128B, "v60,v62,v65,v66" },
2182 { Hexagon::BI__builtin_HEXAGON_V6_vgth_or, "v60,v62,v65,v66" },
2183 { Hexagon::BI__builtin_HEXAGON_V6_vgth_or_128B, "v60,v62,v65,v66" },
2184 { Hexagon::BI__builtin_HEXAGON_V6_vgth_xor, "v60,v62,v65,v66" },
2185 { Hexagon::BI__builtin_HEXAGON_V6_vgth_xor_128B, "v60,v62,v65,v66" },
2186 { Hexagon::BI__builtin_HEXAGON_V6_vgtub, "v60,v62,v65,v66" },
2187 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_128B, "v60,v62,v65,v66" },
2188 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_and, "v60,v62,v65,v66" },
2189 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_and_128B, "v60,v62,v65,v66" },
2190 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_or, "v60,v62,v65,v66" },
2191 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_or_128B, "v60,v62,v65,v66" },
2192 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_xor, "v60,v62,v65,v66" },
2193 { Hexagon::BI__builtin_HEXAGON_V6_vgtub_xor_128B, "v60,v62,v65,v66" },
2194 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh, "v60,v62,v65,v66" },
2195 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_128B, "v60,v62,v65,v66" },
2196 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_and, "v60,v62,v65,v66" },
2197 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_and_128B, "v60,v62,v65,v66" },
2198 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_or, "v60,v62,v65,v66" },
2199 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_or_128B, "v60,v62,v65,v66" },
2200 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_xor, "v60,v62,v65,v66" },
2201 { Hexagon::BI__builtin_HEXAGON_V6_vgtuh_xor_128B, "v60,v62,v65,v66" },
2202 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw, "v60,v62,v65,v66" },
2203 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_128B, "v60,v62,v65,v66" },
2204 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_and, "v60,v62,v65,v66" },
2205 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_and_128B, "v60,v62,v65,v66" },
2206 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_or, "v60,v62,v65,v66" },
2207 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_or_128B, "v60,v62,v65,v66" },
2208 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_xor, "v60,v62,v65,v66" },
2209 { Hexagon::BI__builtin_HEXAGON_V6_vgtuw_xor_128B, "v60,v62,v65,v66" },
2210 { Hexagon::BI__builtin_HEXAGON_V6_vgtw, "v60,v62,v65,v66" },
2211 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_128B, "v60,v62,v65,v66" },
2212 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_and, "v60,v62,v65,v66" },
2213 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_and_128B, "v60,v62,v65,v66" },
2214 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_or, "v60,v62,v65,v66" },
2215 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_or_128B, "v60,v62,v65,v66" },
2216 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_xor, "v60,v62,v65,v66" },
2217 { Hexagon::BI__builtin_HEXAGON_V6_vgtw_xor_128B, "v60,v62,v65,v66" },
2218 { Hexagon::BI__builtin_HEXAGON_V6_vinsertwr, "v60,v62,v65,v66" },
2219 { Hexagon::BI__builtin_HEXAGON_V6_vinsertwr_128B, "v60,v62,v65,v66" },
2220 { Hexagon::BI__builtin_HEXAGON_V6_vlalignb, "v60,v62,v65,v66" },
2221 { Hexagon::BI__builtin_HEXAGON_V6_vlalignb_128B, "v60,v62,v65,v66" },
2222 { Hexagon::BI__builtin_HEXAGON_V6_vlalignbi, "v60,v62,v65,v66" },
2223 { Hexagon::BI__builtin_HEXAGON_V6_vlalignbi_128B, "v60,v62,v65,v66" },
2224 { Hexagon::BI__builtin_HEXAGON_V6_vlsrb, "v62,v65,v66" },
2225 { Hexagon::BI__builtin_HEXAGON_V6_vlsrb_128B, "v62,v65,v66" },
2226 { Hexagon::BI__builtin_HEXAGON_V6_vlsrh, "v60,v62,v65,v66" },
2227 { Hexagon::BI__builtin_HEXAGON_V6_vlsrh_128B, "v60,v62,v65,v66" },
2228 { Hexagon::BI__builtin_HEXAGON_V6_vlsrhv, "v60,v62,v65,v66" },
2229 { Hexagon::BI__builtin_HEXAGON_V6_vlsrhv_128B, "v60,v62,v65,v66" },
2230 { Hexagon::BI__builtin_HEXAGON_V6_vlsrw, "v60,v62,v65,v66" },
2231 { Hexagon::BI__builtin_HEXAGON_V6_vlsrw_128B, "v60,v62,v65,v66" },
2232 { Hexagon::BI__builtin_HEXAGON_V6_vlsrwv, "v60,v62,v65,v66" },
2233 { Hexagon::BI__builtin_HEXAGON_V6_vlsrwv_128B, "v60,v62,v65,v66" },
2234 { Hexagon::BI__builtin_HEXAGON_V6_vlut4, "v65,v66" },
2235 { Hexagon::BI__builtin_HEXAGON_V6_vlut4_128B, "v65,v66" },
2236 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb, "v60,v62,v65,v66" },
2237 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_128B, "v60,v62,v65,v66" },
2238 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvbi, "v62,v65,v66" },
2239 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvbi_128B, "v62,v65,v66" },
2240 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_nm, "v62,v65,v66" },
2241 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_nm_128B, "v62,v65,v66" },
2242 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_oracc, "v60,v62,v65,v66" },
2243 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_oracc_128B, "v60,v62,v65,v66" },
2244 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_oracci, "v62,v65,v66" },
2245 { Hexagon::BI__builtin_HEXAGON_V6_vlutvvb_oracci_128B, "v62,v65,v66" },
2246 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh, "v60,v62,v65,v66" },
2247 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_128B, "v60,v62,v65,v66" },
2248 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwhi, "v62,v65,v66" },
2249 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwhi_128B, "v62,v65,v66" },
2250 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_nm, "v62,v65,v66" },
2251 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_nm_128B, "v62,v65,v66" },
2252 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_oracc, "v60,v62,v65,v66" },
2253 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_oracc_128B, "v60,v62,v65,v66" },
2254 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_oracci, "v62,v65,v66" },
2255 { Hexagon::BI__builtin_HEXAGON_V6_vlutvwh_oracci_128B, "v62,v65,v66" },
2256 { Hexagon::BI__builtin_HEXAGON_V6_vmaxb, "v62,v65,v66" },
2257 { Hexagon::BI__builtin_HEXAGON_V6_vmaxb_128B, "v62,v65,v66" },
2258 { Hexagon::BI__builtin_HEXAGON_V6_vmaxh, "v60,v62,v65,v66" },
2259 { Hexagon::BI__builtin_HEXAGON_V6_vmaxh_128B, "v60,v62,v65,v66" },
2260 { Hexagon::BI__builtin_HEXAGON_V6_vmaxub, "v60,v62,v65,v66" },
2261 { Hexagon::BI__builtin_HEXAGON_V6_vmaxub_128B, "v60,v62,v65,v66" },
2262 { Hexagon::BI__builtin_HEXAGON_V6_vmaxuh, "v60,v62,v65,v66" },
2263 { Hexagon::BI__builtin_HEXAGON_V6_vmaxuh_128B, "v60,v62,v65,v66" },
2264 { Hexagon::BI__builtin_HEXAGON_V6_vmaxw, "v60,v62,v65,v66" },
2265 { Hexagon::BI__builtin_HEXAGON_V6_vmaxw_128B, "v60,v62,v65,v66" },
2266 { Hexagon::BI__builtin_HEXAGON_V6_vminb, "v62,v65,v66" },
2267 { Hexagon::BI__builtin_HEXAGON_V6_vminb_128B, "v62,v65,v66" },
2268 { Hexagon::BI__builtin_HEXAGON_V6_vminh, "v60,v62,v65,v66" },
2269 { Hexagon::BI__builtin_HEXAGON_V6_vminh_128B, "v60,v62,v65,v66" },
2270 { Hexagon::BI__builtin_HEXAGON_V6_vminub, "v60,v62,v65,v66" },
2271 { Hexagon::BI__builtin_HEXAGON_V6_vminub_128B, "v60,v62,v65,v66" },
2272 { Hexagon::BI__builtin_HEXAGON_V6_vminuh, "v60,v62,v65,v66" },
2273 { Hexagon::BI__builtin_HEXAGON_V6_vminuh_128B, "v60,v62,v65,v66" },
2274 { Hexagon::BI__builtin_HEXAGON_V6_vminw, "v60,v62,v65,v66" },
2275 { Hexagon::BI__builtin_HEXAGON_V6_vminw_128B, "v60,v62,v65,v66" },
2276 { Hexagon::BI__builtin_HEXAGON_V6_vmpabus, "v60,v62,v65,v66" },
2277 { Hexagon::BI__builtin_HEXAGON_V6_vmpabus_128B, "v60,v62,v65,v66" },
2278 { Hexagon::BI__builtin_HEXAGON_V6_vmpabus_acc, "v60,v62,v65,v66" },
2279 { Hexagon::BI__builtin_HEXAGON_V6_vmpabus_acc_128B, "v60,v62,v65,v66" },
2280 { Hexagon::BI__builtin_HEXAGON_V6_vmpabusv, "v60,v62,v65,v66" },
2281 { Hexagon::BI__builtin_HEXAGON_V6_vmpabusv_128B, "v60,v62,v65,v66" },
2282 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuu, "v65,v66" },
2283 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuu_128B, "v65,v66" },
2284 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuu_acc, "v65,v66" },
2285 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuu_acc_128B, "v65,v66" },
2286 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuuv, "v60,v62,v65,v66" },
2287 { Hexagon::BI__builtin_HEXAGON_V6_vmpabuuv_128B, "v60,v62,v65,v66" },
2288 { Hexagon::BI__builtin_HEXAGON_V6_vmpahb, "v60,v62,v65,v66" },
2289 { Hexagon::BI__builtin_HEXAGON_V6_vmpahb_128B, "v60,v62,v65,v66" },
2290 { Hexagon::BI__builtin_HEXAGON_V6_vmpahb_acc, "v60,v62,v65,v66" },
2291 { Hexagon::BI__builtin_HEXAGON_V6_vmpahb_acc_128B, "v60,v62,v65,v66" },
2292 { Hexagon::BI__builtin_HEXAGON_V6_vmpahhsat, "v65,v66" },
2293 { Hexagon::BI__builtin_HEXAGON_V6_vmpahhsat_128B, "v65,v66" },
2294 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhb, "v62,v65,v66" },
2295 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhb_128B, "v62,v65,v66" },
2296 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhb_acc, "v62,v65,v66" },
2297 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhb_acc_128B, "v62,v65,v66" },
2298 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhuhsat, "v65,v66" },
2299 { Hexagon::BI__builtin_HEXAGON_V6_vmpauhuhsat_128B, "v65,v66" },
2300 { Hexagon::BI__builtin_HEXAGON_V6_vmpsuhuhsat, "v65,v66" },
2301 { Hexagon::BI__builtin_HEXAGON_V6_vmpsuhuhsat_128B, "v65,v66" },
2302 { Hexagon::BI__builtin_HEXAGON_V6_vmpybus, "v60,v62,v65,v66" },
2303 { Hexagon::BI__builtin_HEXAGON_V6_vmpybus_128B, "v60,v62,v65,v66" },
2304 { Hexagon::BI__builtin_HEXAGON_V6_vmpybus_acc, "v60,v62,v65,v66" },
2305 { Hexagon::BI__builtin_HEXAGON_V6_vmpybus_acc_128B, "v60,v62,v65,v66" },
2306 { Hexagon::BI__builtin_HEXAGON_V6_vmpybusv, "v60,v62,v65,v66" },
2307 { Hexagon::BI__builtin_HEXAGON_V6_vmpybusv_128B, "v60,v62,v65,v66" },
2308 { Hexagon::BI__builtin_HEXAGON_V6_vmpybusv_acc, "v60,v62,v65,v66" },
2309 { Hexagon::BI__builtin_HEXAGON_V6_vmpybusv_acc_128B, "v60,v62,v65,v66" },
2310 { Hexagon::BI__builtin_HEXAGON_V6_vmpybv, "v60,v62,v65,v66" },
2311 { Hexagon::BI__builtin_HEXAGON_V6_vmpybv_128B, "v60,v62,v65,v66" },
2312 { Hexagon::BI__builtin_HEXAGON_V6_vmpybv_acc, "v60,v62,v65,v66" },
2313 { Hexagon::BI__builtin_HEXAGON_V6_vmpybv_acc_128B, "v60,v62,v65,v66" },
2314 { Hexagon::BI__builtin_HEXAGON_V6_vmpyewuh, "v60,v62,v65,v66" },
2315 { Hexagon::BI__builtin_HEXAGON_V6_vmpyewuh_128B, "v60,v62,v65,v66" },
2316 { Hexagon::BI__builtin_HEXAGON_V6_vmpyewuh_64, "v62,v65,v66" },
2317 { Hexagon::BI__builtin_HEXAGON_V6_vmpyewuh_64_128B, "v62,v65,v66" },
2318 { Hexagon::BI__builtin_HEXAGON_V6_vmpyh, "v60,v62,v65,v66" },
2319 { Hexagon::BI__builtin_HEXAGON_V6_vmpyh_128B, "v60,v62,v65,v66" },
2320 { Hexagon::BI__builtin_HEXAGON_V6_vmpyh_acc, "v65,v66" },
2321 { Hexagon::BI__builtin_HEXAGON_V6_vmpyh_acc_128B, "v65,v66" },
2322 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhsat_acc, "v60,v62,v65,v66" },
2323 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhsat_acc_128B, "v60,v62,v65,v66" },
2324 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhsrs, "v60,v62,v65,v66" },
2325 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhsrs_128B, "v60,v62,v65,v66" },
2326 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhss, "v60,v62,v65,v66" },
2327 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhss_128B, "v60,v62,v65,v66" },
2328 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhus, "v60,v62,v65,v66" },
2329 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhus_128B, "v60,v62,v65,v66" },
2330 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhus_acc, "v60,v62,v65,v66" },
2331 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhus_acc_128B, "v60,v62,v65,v66" },
2332 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhv, "v60,v62,v65,v66" },
2333 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhv_128B, "v60,v62,v65,v66" },
2334 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhv_acc, "v60,v62,v65,v66" },
2335 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhv_acc_128B, "v60,v62,v65,v66" },
2336 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhvsrs, "v60,v62,v65,v66" },
2337 { Hexagon::BI__builtin_HEXAGON_V6_vmpyhvsrs_128B, "v60,v62,v65,v66" },
2338 { Hexagon::BI__builtin_HEXAGON_V6_vmpyieoh, "v60,v62,v65,v66" },
2339 { Hexagon::BI__builtin_HEXAGON_V6_vmpyieoh_128B, "v60,v62,v65,v66" },
2340 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewh_acc, "v60,v62,v65,v66" },
2341 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewh_acc_128B, "v60,v62,v65,v66" },
2342 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewuh, "v60,v62,v65,v66" },
2343 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewuh_128B, "v60,v62,v65,v66" },
2344 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewuh_acc, "v60,v62,v65,v66" },
2345 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiewuh_acc_128B, "v60,v62,v65,v66" },
2346 { Hexagon::BI__builtin_HEXAGON_V6_vmpyih, "v60,v62,v65,v66" },
2347 { Hexagon::BI__builtin_HEXAGON_V6_vmpyih_128B, "v60,v62,v65,v66" },
2348 { Hexagon::BI__builtin_HEXAGON_V6_vmpyih_acc, "v60,v62,v65,v66" },
2349 { Hexagon::BI__builtin_HEXAGON_V6_vmpyih_acc_128B, "v60,v62,v65,v66" },
2350 { Hexagon::BI__builtin_HEXAGON_V6_vmpyihb, "v60,v62,v65,v66" },
2351 { Hexagon::BI__builtin_HEXAGON_V6_vmpyihb_128B, "v60,v62,v65,v66" },
2352 { Hexagon::BI__builtin_HEXAGON_V6_vmpyihb_acc, "v60,v62,v65,v66" },
2353 { Hexagon::BI__builtin_HEXAGON_V6_vmpyihb_acc_128B, "v60,v62,v65,v66" },
2354 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiowh, "v60,v62,v65,v66" },
2355 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiowh_128B, "v60,v62,v65,v66" },
2356 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwb, "v60,v62,v65,v66" },
2357 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwb_128B, "v60,v62,v65,v66" },
2358 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwb_acc, "v60,v62,v65,v66" },
2359 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwb_acc_128B, "v60,v62,v65,v66" },
2360 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwh, "v60,v62,v65,v66" },
2361 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwh_128B, "v60,v62,v65,v66" },
2362 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwh_acc, "v60,v62,v65,v66" },
2363 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwh_acc_128B, "v60,v62,v65,v66" },
2364 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwub, "v62,v65,v66" },
2365 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwub_128B, "v62,v65,v66" },
2366 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwub_acc, "v62,v65,v66" },
2367 { Hexagon::BI__builtin_HEXAGON_V6_vmpyiwub_acc_128B, "v62,v65,v66" },
2368 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh, "v60,v62,v65,v66" },
2369 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_128B, "v60,v62,v65,v66" },
2370 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_64_acc, "v62,v65,v66" },
2371 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_64_acc_128B, "v62,v65,v66" },
2372 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_rnd, "v60,v62,v65,v66" },
2373 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_rnd_128B, "v60,v62,v65,v66" },
2374 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_rnd_sacc, "v60,v62,v65,v66" },
2375 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_rnd_sacc_128B, "v60,v62,v65,v66" },
2376 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_sacc, "v60,v62,v65,v66" },
2377 { Hexagon::BI__builtin_HEXAGON_V6_vmpyowh_sacc_128B, "v60,v62,v65,v66" },
2378 { Hexagon::BI__builtin_HEXAGON_V6_vmpyub, "v60,v62,v65,v66" },
2379 { Hexagon::BI__builtin_HEXAGON_V6_vmpyub_128B, "v60,v62,v65,v66" },
2380 { Hexagon::BI__builtin_HEXAGON_V6_vmpyub_acc, "v60,v62,v65,v66" },
2381 { Hexagon::BI__builtin_HEXAGON_V6_vmpyub_acc_128B, "v60,v62,v65,v66" },
2382 { Hexagon::BI__builtin_HEXAGON_V6_vmpyubv, "v60,v62,v65,v66" },
2383 { Hexagon::BI__builtin_HEXAGON_V6_vmpyubv_128B, "v60,v62,v65,v66" },
2384 { Hexagon::BI__builtin_HEXAGON_V6_vmpyubv_acc, "v60,v62,v65,v66" },
2385 { Hexagon::BI__builtin_HEXAGON_V6_vmpyubv_acc_128B, "v60,v62,v65,v66" },
2386 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuh, "v60,v62,v65,v66" },
2387 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuh_128B, "v60,v62,v65,v66" },
2388 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuh_acc, "v60,v62,v65,v66" },
2389 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuh_acc_128B, "v60,v62,v65,v66" },
2390 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhe, "v65,v66" },
2391 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhe_128B, "v65,v66" },
2392 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhe_acc, "v65,v66" },
2393 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhe_acc_128B, "v65,v66" },
2394 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhv, "v60,v62,v65,v66" },
2395 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhv_128B, "v60,v62,v65,v66" },
2396 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhv_acc, "v60,v62,v65,v66" },
2397 { Hexagon::BI__builtin_HEXAGON_V6_vmpyuhv_acc_128B, "v60,v62,v65,v66" },
2398 { Hexagon::BI__builtin_HEXAGON_V6_vmux, "v60,v62,v65,v66" },
2399 { Hexagon::BI__builtin_HEXAGON_V6_vmux_128B, "v60,v62,v65,v66" },
2400 { Hexagon::BI__builtin_HEXAGON_V6_vnavgb, "v65,v66" },
2401 { Hexagon::BI__builtin_HEXAGON_V6_vnavgb_128B, "v65,v66" },
2402 { Hexagon::BI__builtin_HEXAGON_V6_vnavgh, "v60,v62,v65,v66" },
2403 { Hexagon::BI__builtin_HEXAGON_V6_vnavgh_128B, "v60,v62,v65,v66" },
2404 { Hexagon::BI__builtin_HEXAGON_V6_vnavgub, "v60,v62,v65,v66" },
2405 { Hexagon::BI__builtin_HEXAGON_V6_vnavgub_128B, "v60,v62,v65,v66" },
2406 { Hexagon::BI__builtin_HEXAGON_V6_vnavgw, "v60,v62,v65,v66" },
2407 { Hexagon::BI__builtin_HEXAGON_V6_vnavgw_128B, "v60,v62,v65,v66" },
2408 { Hexagon::BI__builtin_HEXAGON_V6_vnormamth, "v60,v62,v65,v66" },
2409 { Hexagon::BI__builtin_HEXAGON_V6_vnormamth_128B, "v60,v62,v65,v66" },
2410 { Hexagon::BI__builtin_HEXAGON_V6_vnormamtw, "v60,v62,v65,v66" },
2411 { Hexagon::BI__builtin_HEXAGON_V6_vnormamtw_128B, "v60,v62,v65,v66" },
2412 { Hexagon::BI__builtin_HEXAGON_V6_vnot, "v60,v62,v65,v66" },
2413 { Hexagon::BI__builtin_HEXAGON_V6_vnot_128B, "v60,v62,v65,v66" },
2414 { Hexagon::BI__builtin_HEXAGON_V6_vor, "v60,v62,v65,v66" },
2415 { Hexagon::BI__builtin_HEXAGON_V6_vor_128B, "v60,v62,v65,v66" },
2416 { Hexagon::BI__builtin_HEXAGON_V6_vpackeb, "v60,v62,v65,v66" },
2417 { Hexagon::BI__builtin_HEXAGON_V6_vpackeb_128B, "v60,v62,v65,v66" },
2418 { Hexagon::BI__builtin_HEXAGON_V6_vpackeh, "v60,v62,v65,v66" },
2419 { Hexagon::BI__builtin_HEXAGON_V6_vpackeh_128B, "v60,v62,v65,v66" },
2420 { Hexagon::BI__builtin_HEXAGON_V6_vpackhb_sat, "v60,v62,v65,v66" },
2421 { Hexagon::BI__builtin_HEXAGON_V6_vpackhb_sat_128B, "v60,v62,v65,v66" },
2422 { Hexagon::BI__builtin_HEXAGON_V6_vpackhub_sat, "v60,v62,v65,v66" },
2423 { Hexagon::BI__builtin_HEXAGON_V6_vpackhub_sat_128B, "v60,v62,v65,v66" },
2424 { Hexagon::BI__builtin_HEXAGON_V6_vpackob, "v60,v62,v65,v66" },
2425 { Hexagon::BI__builtin_HEXAGON_V6_vpackob_128B, "v60,v62,v65,v66" },
2426 { Hexagon::BI__builtin_HEXAGON_V6_vpackoh, "v60,v62,v65,v66" },
2427 { Hexagon::BI__builtin_HEXAGON_V6_vpackoh_128B, "v60,v62,v65,v66" },
2428 { Hexagon::BI__builtin_HEXAGON_V6_vpackwh_sat, "v60,v62,v65,v66" },
2429 { Hexagon::BI__builtin_HEXAGON_V6_vpackwh_sat_128B, "v60,v62,v65,v66" },
2430 { Hexagon::BI__builtin_HEXAGON_V6_vpackwuh_sat, "v60,v62,v65,v66" },
2431 { Hexagon::BI__builtin_HEXAGON_V6_vpackwuh_sat_128B, "v60,v62,v65,v66" },
2432 { Hexagon::BI__builtin_HEXAGON_V6_vpopcounth, "v60,v62,v65,v66" },
2433 { Hexagon::BI__builtin_HEXAGON_V6_vpopcounth_128B, "v60,v62,v65,v66" },
2434 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqb, "v65,v66" },
2435 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqb_128B, "v65,v66" },
2436 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqh, "v65,v66" },
2437 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqh_128B, "v65,v66" },
2438 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqw, "v65,v66" },
2439 { Hexagon::BI__builtin_HEXAGON_V6_vprefixqw_128B, "v65,v66" },
2440 { Hexagon::BI__builtin_HEXAGON_V6_vrdelta, "v60,v62,v65,v66" },
2441 { Hexagon::BI__builtin_HEXAGON_V6_vrdelta_128B, "v60,v62,v65,v66" },
2442 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybub_rtt, "v65" },
2443 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybub_rtt_128B, "v65" },
2444 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybub_rtt_acc, "v65" },
2445 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybub_rtt_acc_128B, "v65" },
2446 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybus, "v60,v62,v65,v66" },
2447 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybus_128B, "v60,v62,v65,v66" },
2448 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybus_acc, "v60,v62,v65,v66" },
2449 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybus_acc_128B, "v60,v62,v65,v66" },
2450 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi, "v60,v62,v65,v66" },
2451 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_128B, "v60,v62,v65,v66" },
2452 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_acc, "v60,v62,v65,v66" },
2453 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_acc_128B, "v60,v62,v65,v66" },
2454 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusv, "v60,v62,v65,v66" },
2455 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusv_128B, "v60,v62,v65,v66" },
2456 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusv_acc, "v60,v62,v65,v66" },
2457 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusv_acc_128B, "v60,v62,v65,v66" },
2458 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybv, "v60,v62,v65,v66" },
2459 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybv_128B, "v60,v62,v65,v66" },
2460 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybv_acc, "v60,v62,v65,v66" },
2461 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybv_acc_128B, "v60,v62,v65,v66" },
2462 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub, "v60,v62,v65,v66" },
2463 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_128B, "v60,v62,v65,v66" },
2464 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_acc, "v60,v62,v65,v66" },
2465 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_acc_128B, "v60,v62,v65,v66" },
2466 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi, "v60,v62,v65,v66" },
2467 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_128B, "v60,v62,v65,v66" },
2468 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_acc, "v60,v62,v65,v66" },
2469 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_acc_128B, "v60,v62,v65,v66" },
2470 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_rtt, "v65" },
2471 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_rtt_128B, "v65" },
2472 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_rtt_acc, "v65" },
2473 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyub_rtt_acc_128B, "v65" },
2474 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubv, "v60,v62,v65,v66" },
2475 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubv_128B, "v60,v62,v65,v66" },
2476 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubv_acc, "v60,v62,v65,v66" },
2477 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubv_acc_128B, "v60,v62,v65,v66" },
2478 { Hexagon::BI__builtin_HEXAGON_V6_vror, "v60,v62,v65,v66" },
2479 { Hexagon::BI__builtin_HEXAGON_V6_vror_128B, "v60,v62,v65,v66" },
2480 { Hexagon::BI__builtin_HEXAGON_V6_vrotr, "v66" },
2481 { Hexagon::BI__builtin_HEXAGON_V6_vrotr_128B, "v66" },
2482 { Hexagon::BI__builtin_HEXAGON_V6_vroundhb, "v60,v62,v65,v66" },
2483 { Hexagon::BI__builtin_HEXAGON_V6_vroundhb_128B, "v60,v62,v65,v66" },
2484 { Hexagon::BI__builtin_HEXAGON_V6_vroundhub, "v60,v62,v65,v66" },
2485 { Hexagon::BI__builtin_HEXAGON_V6_vroundhub_128B, "v60,v62,v65,v66" },
2486 { Hexagon::BI__builtin_HEXAGON_V6_vrounduhub, "v62,v65,v66" },
2487 { Hexagon::BI__builtin_HEXAGON_V6_vrounduhub_128B, "v62,v65,v66" },
2488 { Hexagon::BI__builtin_HEXAGON_V6_vrounduwuh, "v62,v65,v66" },
2489 { Hexagon::BI__builtin_HEXAGON_V6_vrounduwuh_128B, "v62,v65,v66" },
2490 { Hexagon::BI__builtin_HEXAGON_V6_vroundwh, "v60,v62,v65,v66" },
2491 { Hexagon::BI__builtin_HEXAGON_V6_vroundwh_128B, "v60,v62,v65,v66" },
2492 { Hexagon::BI__builtin_HEXAGON_V6_vroundwuh, "v60,v62,v65,v66" },
2493 { Hexagon::BI__builtin_HEXAGON_V6_vroundwuh_128B, "v60,v62,v65,v66" },
2494 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi, "v60,v62,v65,v66" },
2495 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_128B, "v60,v62,v65,v66" },
2496 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_acc, "v60,v62,v65,v66" },
2497 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_acc_128B, "v60,v62,v65,v66" },
2498 { Hexagon::BI__builtin_HEXAGON_V6_vsatdw, "v66" },
2499 { Hexagon::BI__builtin_HEXAGON_V6_vsatdw_128B, "v66" },
2500 { Hexagon::BI__builtin_HEXAGON_V6_vsathub, "v60,v62,v65,v66" },
2501 { Hexagon::BI__builtin_HEXAGON_V6_vsathub_128B, "v60,v62,v65,v66" },
2502 { Hexagon::BI__builtin_HEXAGON_V6_vsatuwuh, "v62,v65,v66" },
2503 { Hexagon::BI__builtin_HEXAGON_V6_vsatuwuh_128B, "v62,v65,v66" },
2504 { Hexagon::BI__builtin_HEXAGON_V6_vsatwh, "v60,v62,v65,v66" },
2505 { Hexagon::BI__builtin_HEXAGON_V6_vsatwh_128B, "v60,v62,v65,v66" },
2506 { Hexagon::BI__builtin_HEXAGON_V6_vsb, "v60,v62,v65,v66" },
2507 { Hexagon::BI__builtin_HEXAGON_V6_vsb_128B, "v60,v62,v65,v66" },
2508 { Hexagon::BI__builtin_HEXAGON_V6_vsh, "v60,v62,v65,v66" },
2509 { Hexagon::BI__builtin_HEXAGON_V6_vsh_128B, "v60,v62,v65,v66" },
2510 { Hexagon::BI__builtin_HEXAGON_V6_vshufeh, "v60,v62,v65,v66" },
2511 { Hexagon::BI__builtin_HEXAGON_V6_vshufeh_128B, "v60,v62,v65,v66" },
2512 { Hexagon::BI__builtin_HEXAGON_V6_vshuffb, "v60,v62,v65,v66" },
2513 { Hexagon::BI__builtin_HEXAGON_V6_vshuffb_128B, "v60,v62,v65,v66" },
2514 { Hexagon::BI__builtin_HEXAGON_V6_vshuffeb, "v60,v62,v65,v66" },
2515 { Hexagon::BI__builtin_HEXAGON_V6_vshuffeb_128B, "v60,v62,v65,v66" },
2516 { Hexagon::BI__builtin_HEXAGON_V6_vshuffh, "v60,v62,v65,v66" },
2517 { Hexagon::BI__builtin_HEXAGON_V6_vshuffh_128B, "v60,v62,v65,v66" },
2518 { Hexagon::BI__builtin_HEXAGON_V6_vshuffob, "v60,v62,v65,v66" },
2519 { Hexagon::BI__builtin_HEXAGON_V6_vshuffob_128B, "v60,v62,v65,v66" },
2520 { Hexagon::BI__builtin_HEXAGON_V6_vshuffvdd, "v60,v62,v65,v66" },
2521 { Hexagon::BI__builtin_HEXAGON_V6_vshuffvdd_128B, "v60,v62,v65,v66" },
2522 { Hexagon::BI__builtin_HEXAGON_V6_vshufoeb, "v60,v62,v65,v66" },
2523 { Hexagon::BI__builtin_HEXAGON_V6_vshufoeb_128B, "v60,v62,v65,v66" },
2524 { Hexagon::BI__builtin_HEXAGON_V6_vshufoeh, "v60,v62,v65,v66" },
2525 { Hexagon::BI__builtin_HEXAGON_V6_vshufoeh_128B, "v60,v62,v65,v66" },
2526 { Hexagon::BI__builtin_HEXAGON_V6_vshufoh, "v60,v62,v65,v66" },
2527 { Hexagon::BI__builtin_HEXAGON_V6_vshufoh_128B, "v60,v62,v65,v66" },
2528 { Hexagon::BI__builtin_HEXAGON_V6_vsubb, "v60,v62,v65,v66" },
2529 { Hexagon::BI__builtin_HEXAGON_V6_vsubb_128B, "v60,v62,v65,v66" },
2530 { Hexagon::BI__builtin_HEXAGON_V6_vsubb_dv, "v60,v62,v65,v66" },
2531 { Hexagon::BI__builtin_HEXAGON_V6_vsubb_dv_128B, "v60,v62,v65,v66" },
2532 { Hexagon::BI__builtin_HEXAGON_V6_vsubbsat, "v62,v65,v66" },
2533 { Hexagon::BI__builtin_HEXAGON_V6_vsubbsat_128B, "v62,v65,v66" },
2534 { Hexagon::BI__builtin_HEXAGON_V6_vsubbsat_dv, "v62,v65,v66" },
2535 { Hexagon::BI__builtin_HEXAGON_V6_vsubbsat_dv_128B, "v62,v65,v66" },
2536 { Hexagon::BI__builtin_HEXAGON_V6_vsubcarry, "v62,v65,v66" },
2537 { Hexagon::BI__builtin_HEXAGON_V6_vsubcarry_128B, "v62,v65,v66" },
2538 { Hexagon::BI__builtin_HEXAGON_V6_vsubh, "v60,v62,v65,v66" },
2539 { Hexagon::BI__builtin_HEXAGON_V6_vsubh_128B, "v60,v62,v65,v66" },
2540 { Hexagon::BI__builtin_HEXAGON_V6_vsubh_dv, "v60,v62,v65,v66" },
2541 { Hexagon::BI__builtin_HEXAGON_V6_vsubh_dv_128B, "v60,v62,v65,v66" },
2542 { Hexagon::BI__builtin_HEXAGON_V6_vsubhsat, "v60,v62,v65,v66" },
2543 { Hexagon::BI__builtin_HEXAGON_V6_vsubhsat_128B, "v60,v62,v65,v66" },
2544 { Hexagon::BI__builtin_HEXAGON_V6_vsubhsat_dv, "v60,v62,v65,v66" },
2545 { Hexagon::BI__builtin_HEXAGON_V6_vsubhsat_dv_128B, "v60,v62,v65,v66" },
2546 { Hexagon::BI__builtin_HEXAGON_V6_vsubhw, "v60,v62,v65,v66" },
2547 { Hexagon::BI__builtin_HEXAGON_V6_vsubhw_128B, "v60,v62,v65,v66" },
2548 { Hexagon::BI__builtin_HEXAGON_V6_vsububh, "v60,v62,v65,v66" },
2549 { Hexagon::BI__builtin_HEXAGON_V6_vsububh_128B, "v60,v62,v65,v66" },
2550 { Hexagon::BI__builtin_HEXAGON_V6_vsububsat, "v60,v62,v65,v66" },
2551 { Hexagon::BI__builtin_HEXAGON_V6_vsububsat_128B, "v60,v62,v65,v66" },
2552 { Hexagon::BI__builtin_HEXAGON_V6_vsububsat_dv, "v60,v62,v65,v66" },
2553 { Hexagon::BI__builtin_HEXAGON_V6_vsububsat_dv_128B, "v60,v62,v65,v66" },
2554 { Hexagon::BI__builtin_HEXAGON_V6_vsubububb_sat, "v62,v65,v66" },
2555 { Hexagon::BI__builtin_HEXAGON_V6_vsubububb_sat_128B, "v62,v65,v66" },
2556 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhsat, "v60,v62,v65,v66" },
2557 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhsat_128B, "v60,v62,v65,v66" },
2558 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhsat_dv, "v60,v62,v65,v66" },
2559 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhsat_dv_128B, "v60,v62,v65,v66" },
2560 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhw, "v60,v62,v65,v66" },
2561 { Hexagon::BI__builtin_HEXAGON_V6_vsubuhw_128B, "v60,v62,v65,v66" },
2562 { Hexagon::BI__builtin_HEXAGON_V6_vsubuwsat, "v62,v65,v66" },
2563 { Hexagon::BI__builtin_HEXAGON_V6_vsubuwsat_128B, "v62,v65,v66" },
2564 { Hexagon::BI__builtin_HEXAGON_V6_vsubuwsat_dv, "v62,v65,v66" },
2565 { Hexagon::BI__builtin_HEXAGON_V6_vsubuwsat_dv_128B, "v62,v65,v66" },
2566 { Hexagon::BI__builtin_HEXAGON_V6_vsubw, "v60,v62,v65,v66" },
2567 { Hexagon::BI__builtin_HEXAGON_V6_vsubw_128B, "v60,v62,v65,v66" },
2568 { Hexagon::BI__builtin_HEXAGON_V6_vsubw_dv, "v60,v62,v65,v66" },
2569 { Hexagon::BI__builtin_HEXAGON_V6_vsubw_dv_128B, "v60,v62,v65,v66" },
2570 { Hexagon::BI__builtin_HEXAGON_V6_vsubwsat, "v60,v62,v65,v66" },
2571 { Hexagon::BI__builtin_HEXAGON_V6_vsubwsat_128B, "v60,v62,v65,v66" },
2572 { Hexagon::BI__builtin_HEXAGON_V6_vsubwsat_dv, "v60,v62,v65,v66" },
2573 { Hexagon::BI__builtin_HEXAGON_V6_vsubwsat_dv_128B, "v60,v62,v65,v66" },
2574 { Hexagon::BI__builtin_HEXAGON_V6_vswap, "v60,v62,v65,v66" },
2575 { Hexagon::BI__builtin_HEXAGON_V6_vswap_128B, "v60,v62,v65,v66" },
2576 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyb, "v60,v62,v65,v66" },
2577 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyb_128B, "v60,v62,v65,v66" },
2578 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyb_acc, "v60,v62,v65,v66" },
2579 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyb_acc_128B, "v60,v62,v65,v66" },
2580 { Hexagon::BI__builtin_HEXAGON_V6_vtmpybus, "v60,v62,v65,v66" },
2581 { Hexagon::BI__builtin_HEXAGON_V6_vtmpybus_128B, "v60,v62,v65,v66" },
2582 { Hexagon::BI__builtin_HEXAGON_V6_vtmpybus_acc, "v60,v62,v65,v66" },
2583 { Hexagon::BI__builtin_HEXAGON_V6_vtmpybus_acc_128B, "v60,v62,v65,v66" },
2584 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyhb, "v60,v62,v65,v66" },
2585 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyhb_128B, "v60,v62,v65,v66" },
2586 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyhb_acc, "v60,v62,v65,v66" },
2587 { Hexagon::BI__builtin_HEXAGON_V6_vtmpyhb_acc_128B, "v60,v62,v65,v66" },
2588 { Hexagon::BI__builtin_HEXAGON_V6_vunpackb, "v60,v62,v65,v66" },
2589 { Hexagon::BI__builtin_HEXAGON_V6_vunpackb_128B, "v60,v62,v65,v66" },
2590 { Hexagon::BI__builtin_HEXAGON_V6_vunpackh, "v60,v62,v65,v66" },
2591 { Hexagon::BI__builtin_HEXAGON_V6_vunpackh_128B, "v60,v62,v65,v66" },
2592 { Hexagon::BI__builtin_HEXAGON_V6_vunpackob, "v60,v62,v65,v66" },
2593 { Hexagon::BI__builtin_HEXAGON_V6_vunpackob_128B, "v60,v62,v65,v66" },
2594 { Hexagon::BI__builtin_HEXAGON_V6_vunpackoh, "v60,v62,v65,v66" },
2595 { Hexagon::BI__builtin_HEXAGON_V6_vunpackoh_128B, "v60,v62,v65,v66" },
2596 { Hexagon::BI__builtin_HEXAGON_V6_vunpackub, "v60,v62,v65,v66" },
2597 { Hexagon::BI__builtin_HEXAGON_V6_vunpackub_128B, "v60,v62,v65,v66" },
2598 { Hexagon::BI__builtin_HEXAGON_V6_vunpackuh, "v60,v62,v65,v66" },
2599 { Hexagon::BI__builtin_HEXAGON_V6_vunpackuh_128B, "v60,v62,v65,v66" },
2600 { Hexagon::BI__builtin_HEXAGON_V6_vxor, "v60,v62,v65,v66" },
2601 { Hexagon::BI__builtin_HEXAGON_V6_vxor_128B, "v60,v62,v65,v66" },
2602 { Hexagon::BI__builtin_HEXAGON_V6_vzb, "v60,v62,v65,v66" },
2603 { Hexagon::BI__builtin_HEXAGON_V6_vzb_128B, "v60,v62,v65,v66" },
2604 { Hexagon::BI__builtin_HEXAGON_V6_vzh, "v60,v62,v65,v66" },
2605 { Hexagon::BI__builtin_HEXAGON_V6_vzh_128B, "v60,v62,v65,v66" },
2606 };
2607
2608 // Sort the tables on first execution so we can binary search them.
2609 auto SortCmp = [](const BuiltinAndString &LHS, const BuiltinAndString &RHS) {
2610 return LHS.BuiltinID < RHS.BuiltinID;
2611 };
2612 static const bool SortOnce =
2613 (llvm::sort(ValidCPU, SortCmp),
2614 llvm::sort(ValidHVX, SortCmp), true);
2615 (void)SortOnce;
2616 auto LowerBoundCmp = [](const BuiltinAndString &BI, unsigned BuiltinID) {
2617 return BI.BuiltinID < BuiltinID;
2618 };
2619
2620 const TargetInfo &TI = Context.getTargetInfo();
2621
2622 const BuiltinAndString *FC =
2623 std::lower_bound(std::begin(ValidCPU), std::end(ValidCPU), BuiltinID,
2624 LowerBoundCmp);
2625 if (FC != std::end(ValidCPU) && FC->BuiltinID == BuiltinID) {
2626 const TargetOptions &Opts = TI.getTargetOpts();
2627 StringRef CPU = Opts.CPU;
2628 if (!CPU.empty()) {
2629 assert(CPU.startswith("hexagon") && "Unexpected CPU name");
2630 CPU.consume_front("hexagon");
2631 SmallVector<StringRef, 3> CPUs;
2632 StringRef(FC->Str).split(CPUs, ',');
2633 if (llvm::none_of(CPUs, [CPU](StringRef S) { return S == CPU; }))
2634 return Diag(TheCall->getBeginLoc(),
2635 diag::err_hexagon_builtin_unsupported_cpu);
2636 }
2637 }
2638
2639 const BuiltinAndString *FH =
2640 std::lower_bound(std::begin(ValidHVX), std::end(ValidHVX), BuiltinID,
2641 LowerBoundCmp);
2642 if (FH != std::end(ValidHVX) && FH->BuiltinID == BuiltinID) {
2643 if (!TI.hasFeature("hvx"))
2644 return Diag(TheCall->getBeginLoc(),
2645 diag::err_hexagon_builtin_requires_hvx);
2646
2647 SmallVector<StringRef, 3> HVXs;
2648 StringRef(FH->Str).split(HVXs, ',');
2649 bool IsValid = llvm::any_of(HVXs,
2650 [&TI] (StringRef V) {
2651 std::string F = "hvx" + V.str();
2652 return TI.hasFeature(F);
2653 });
2654 if (!IsValid)
2655 return Diag(TheCall->getBeginLoc(),
2656 diag::err_hexagon_builtin_unsupported_hvx);
2657 }
2658
2659 return false;
2660 }
2661
2662 bool Sema::CheckHexagonBuiltinArgument(unsigned BuiltinID, CallExpr *TheCall) {
2663 struct ArgInfo {
2664 uint8_t OpNum;
2665 bool IsSigned;
2666 uint8_t BitWidth;
2667 uint8_t Align;
2668 };
2669 struct BuiltinInfo {
2670 unsigned BuiltinID;
2671 ArgInfo Infos[2];
2672 };
2673
2674 static BuiltinInfo Infos[] = {
2675 { Hexagon::BI__builtin_circ_ldd, {{ 3, true, 4, 3 }} },
2676 { Hexagon::BI__builtin_circ_ldw, {{ 3, true, 4, 2 }} },
2677 { Hexagon::BI__builtin_circ_ldh, {{ 3, true, 4, 1 }} },
2678 { Hexagon::BI__builtin_circ_lduh, {{ 3, true, 4, 0 }} },
2679 { Hexagon::BI__builtin_circ_ldb, {{ 3, true, 4, 0 }} },
2680 { Hexagon::BI__builtin_circ_ldub, {{ 3, true, 4, 0 }} },
2681 { Hexagon::BI__builtin_circ_std, {{ 3, true, 4, 3 }} },
2682 { Hexagon::BI__builtin_circ_stw, {{ 3, true, 4, 2 }} },
2683 { Hexagon::BI__builtin_circ_sth, {{ 3, true, 4, 1 }} },
2684 { Hexagon::BI__builtin_circ_sthhi, {{ 3, true, 4, 1 }} },
2685 { Hexagon::BI__builtin_circ_stb, {{ 3, true, 4, 0 }} },
2686
2687 { Hexagon::BI__builtin_HEXAGON_L2_loadrub_pci, {{ 1, true, 4, 0 }} },
2688 { Hexagon::BI__builtin_HEXAGON_L2_loadrb_pci, {{ 1, true, 4, 0 }} },
2689 { Hexagon::BI__builtin_HEXAGON_L2_loadruh_pci, {{ 1, true, 4, 1 }} },
2690 { Hexagon::BI__builtin_HEXAGON_L2_loadrh_pci, {{ 1, true, 4, 1 }} },
2691 { Hexagon::BI__builtin_HEXAGON_L2_loadri_pci, {{ 1, true, 4, 2 }} },
2692 { Hexagon::BI__builtin_HEXAGON_L2_loadrd_pci, {{ 1, true, 4, 3 }} },
2693 { Hexagon::BI__builtin_HEXAGON_S2_storerb_pci, {{ 1, true, 4, 0 }} },
2694 { Hexagon::BI__builtin_HEXAGON_S2_storerh_pci, {{ 1, true, 4, 1 }} },
2695 { Hexagon::BI__builtin_HEXAGON_S2_storerf_pci, {{ 1, true, 4, 1 }} },
2696 { Hexagon::BI__builtin_HEXAGON_S2_storeri_pci, {{ 1, true, 4, 2 }} },
2697 { Hexagon::BI__builtin_HEXAGON_S2_storerd_pci, {{ 1, true, 4, 3 }} },
2698
2699 { Hexagon::BI__builtin_HEXAGON_A2_combineii, {{ 1, true, 8, 0 }} },
2700 { Hexagon::BI__builtin_HEXAGON_A2_tfrih, {{ 1, false, 16, 0 }} },
2701 { Hexagon::BI__builtin_HEXAGON_A2_tfril, {{ 1, false, 16, 0 }} },
2702 { Hexagon::BI__builtin_HEXAGON_A2_tfrpi, {{ 0, true, 8, 0 }} },
2703 { Hexagon::BI__builtin_HEXAGON_A4_bitspliti, {{ 1, false, 5, 0 }} },
2704 { Hexagon::BI__builtin_HEXAGON_A4_cmpbeqi, {{ 1, false, 8, 0 }} },
2705 { Hexagon::BI__builtin_HEXAGON_A4_cmpbgti, {{ 1, true, 8, 0 }} },
2706 { Hexagon::BI__builtin_HEXAGON_A4_cround_ri, {{ 1, false, 5, 0 }} },
2707 { Hexagon::BI__builtin_HEXAGON_A4_round_ri, {{ 1, false, 5, 0 }} },
2708 { Hexagon::BI__builtin_HEXAGON_A4_round_ri_sat, {{ 1, false, 5, 0 }} },
2709 { Hexagon::BI__builtin_HEXAGON_A4_vcmpbeqi, {{ 1, false, 8, 0 }} },
2710 { Hexagon::BI__builtin_HEXAGON_A4_vcmpbgti, {{ 1, true, 8, 0 }} },
2711 { Hexagon::BI__builtin_HEXAGON_A4_vcmpbgtui, {{ 1, false, 7, 0 }} },
2712 { Hexagon::BI__builtin_HEXAGON_A4_vcmpheqi, {{ 1, true, 8, 0 }} },
2713 { Hexagon::BI__builtin_HEXAGON_A4_vcmphgti, {{ 1, true, 8, 0 }} },
2714 { Hexagon::BI__builtin_HEXAGON_A4_vcmphgtui, {{ 1, false, 7, 0 }} },
2715 { Hexagon::BI__builtin_HEXAGON_A4_vcmpweqi, {{ 1, true, 8, 0 }} },
2716 { Hexagon::BI__builtin_HEXAGON_A4_vcmpwgti, {{ 1, true, 8, 0 }} },
2717 { Hexagon::BI__builtin_HEXAGON_A4_vcmpwgtui, {{ 1, false, 7, 0 }} },
2718 { Hexagon::BI__builtin_HEXAGON_C2_bitsclri, {{ 1, false, 6, 0 }} },
2719 { Hexagon::BI__builtin_HEXAGON_C2_muxii, {{ 2, true, 8, 0 }} },
2720 { Hexagon::BI__builtin_HEXAGON_C4_nbitsclri, {{ 1, false, 6, 0 }} },
2721 { Hexagon::BI__builtin_HEXAGON_F2_dfclass, {{ 1, false, 5, 0 }} },
2722 { Hexagon::BI__builtin_HEXAGON_F2_dfimm_n, {{ 0, false, 10, 0 }} },
2723 { Hexagon::BI__builtin_HEXAGON_F2_dfimm_p, {{ 0, false, 10, 0 }} },
2724 { Hexagon::BI__builtin_HEXAGON_F2_sfclass, {{ 1, false, 5, 0 }} },
2725 { Hexagon::BI__builtin_HEXAGON_F2_sfimm_n, {{ 0, false, 10, 0 }} },
2726 { Hexagon::BI__builtin_HEXAGON_F2_sfimm_p, {{ 0, false, 10, 0 }} },
2727 { Hexagon::BI__builtin_HEXAGON_M4_mpyri_addi, {{ 2, false, 6, 0 }} },
2728 { Hexagon::BI__builtin_HEXAGON_M4_mpyri_addr_u2, {{ 1, false, 6, 2 }} },
2729 { Hexagon::BI__builtin_HEXAGON_S2_addasl_rrri, {{ 2, false, 3, 0 }} },
2730 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p_acc, {{ 2, false, 6, 0 }} },
2731 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p_and, {{ 2, false, 6, 0 }} },
2732 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p, {{ 1, false, 6, 0 }} },
2733 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p_nac, {{ 2, false, 6, 0 }} },
2734 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p_or, {{ 2, false, 6, 0 }} },
2735 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_p_xacc, {{ 2, false, 6, 0 }} },
2736 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_acc, {{ 2, false, 5, 0 }} },
2737 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_and, {{ 2, false, 5, 0 }} },
2738 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r, {{ 1, false, 5, 0 }} },
2739 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_nac, {{ 2, false, 5, 0 }} },
2740 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_or, {{ 2, false, 5, 0 }} },
2741 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_sat, {{ 1, false, 5, 0 }} },
2742 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_r_xacc, {{ 2, false, 5, 0 }} },
2743 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_vh, {{ 1, false, 4, 0 }} },
2744 { Hexagon::BI__builtin_HEXAGON_S2_asl_i_vw, {{ 1, false, 5, 0 }} },
2745 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_acc, {{ 2, false, 6, 0 }} },
2746 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_and, {{ 2, false, 6, 0 }} },
2747 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p, {{ 1, false, 6, 0 }} },
2748 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_nac, {{ 2, false, 6, 0 }} },
2749 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_or, {{ 2, false, 6, 0 }} },
2750 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_rnd_goodsyntax,
2751 {{ 1, false, 6, 0 }} },
2752 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_p_rnd, {{ 1, false, 6, 0 }} },
2753 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_acc, {{ 2, false, 5, 0 }} },
2754 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_and, {{ 2, false, 5, 0 }} },
2755 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r, {{ 1, false, 5, 0 }} },
2756 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_nac, {{ 2, false, 5, 0 }} },
2757 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_or, {{ 2, false, 5, 0 }} },
2758 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_rnd_goodsyntax,
2759 {{ 1, false, 5, 0 }} },
2760 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_r_rnd, {{ 1, false, 5, 0 }} },
2761 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_svw_trun, {{ 1, false, 5, 0 }} },
2762 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_vh, {{ 1, false, 4, 0 }} },
2763 { Hexagon::BI__builtin_HEXAGON_S2_asr_i_vw, {{ 1, false, 5, 0 }} },
2764 { Hexagon::BI__builtin_HEXAGON_S2_clrbit_i, {{ 1, false, 5, 0 }} },
2765 { Hexagon::BI__builtin_HEXAGON_S2_extractu, {{ 1, false, 5, 0 },
2766 { 2, false, 5, 0 }} },
2767 { Hexagon::BI__builtin_HEXAGON_S2_extractup, {{ 1, false, 6, 0 },
2768 { 2, false, 6, 0 }} },
2769 { Hexagon::BI__builtin_HEXAGON_S2_insert, {{ 2, false, 5, 0 },
2770 { 3, false, 5, 0 }} },
2771 { Hexagon::BI__builtin_HEXAGON_S2_insertp, {{ 2, false, 6, 0 },
2772 { 3, false, 6, 0 }} },
2773 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p_acc, {{ 2, false, 6, 0 }} },
2774 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p_and, {{ 2, false, 6, 0 }} },
2775 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p, {{ 1, false, 6, 0 }} },
2776 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p_nac, {{ 2, false, 6, 0 }} },
2777 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p_or, {{ 2, false, 6, 0 }} },
2778 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_p_xacc, {{ 2, false, 6, 0 }} },
2779 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r_acc, {{ 2, false, 5, 0 }} },
2780 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r_and, {{ 2, false, 5, 0 }} },
2781 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r, {{ 1, false, 5, 0 }} },
2782 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r_nac, {{ 2, false, 5, 0 }} },
2783 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r_or, {{ 2, false, 5, 0 }} },
2784 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_r_xacc, {{ 2, false, 5, 0 }} },
2785 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_vh, {{ 1, false, 4, 0 }} },
2786 { Hexagon::BI__builtin_HEXAGON_S2_lsr_i_vw, {{ 1, false, 5, 0 }} },
2787 { Hexagon::BI__builtin_HEXAGON_S2_setbit_i, {{ 1, false, 5, 0 }} },
2788 { Hexagon::BI__builtin_HEXAGON_S2_tableidxb_goodsyntax,
2789 {{ 2, false, 4, 0 },
2790 { 3, false, 5, 0 }} },
2791 { Hexagon::BI__builtin_HEXAGON_S2_tableidxd_goodsyntax,
2792 {{ 2, false, 4, 0 },
2793 { 3, false, 5, 0 }} },
2794 { Hexagon::BI__builtin_HEXAGON_S2_tableidxh_goodsyntax,
2795 {{ 2, false, 4, 0 },
2796 { 3, false, 5, 0 }} },
2797 { Hexagon::BI__builtin_HEXAGON_S2_tableidxw_goodsyntax,
2798 {{ 2, false, 4, 0 },
2799 { 3, false, 5, 0 }} },
2800 { Hexagon::BI__builtin_HEXAGON_S2_togglebit_i, {{ 1, false, 5, 0 }} },
2801 { Hexagon::BI__builtin_HEXAGON_S2_tstbit_i, {{ 1, false, 5, 0 }} },
2802 { Hexagon::BI__builtin_HEXAGON_S2_valignib, {{ 2, false, 3, 0 }} },
2803 { Hexagon::BI__builtin_HEXAGON_S2_vspliceib, {{ 2, false, 3, 0 }} },
2804 { Hexagon::BI__builtin_HEXAGON_S4_addi_asl_ri, {{ 2, false, 5, 0 }} },
2805 { Hexagon::BI__builtin_HEXAGON_S4_addi_lsr_ri, {{ 2, false, 5, 0 }} },
2806 { Hexagon::BI__builtin_HEXAGON_S4_andi_asl_ri, {{ 2, false, 5, 0 }} },
2807 { Hexagon::BI__builtin_HEXAGON_S4_andi_lsr_ri, {{ 2, false, 5, 0 }} },
2808 { Hexagon::BI__builtin_HEXAGON_S4_clbaddi, {{ 1, true , 6, 0 }} },
2809 { Hexagon::BI__builtin_HEXAGON_S4_clbpaddi, {{ 1, true, 6, 0 }} },
2810 { Hexagon::BI__builtin_HEXAGON_S4_extract, {{ 1, false, 5, 0 },
2811 { 2, false, 5, 0 }} },
2812 { Hexagon::BI__builtin_HEXAGON_S4_extractp, {{ 1, false, 6, 0 },
2813 { 2, false, 6, 0 }} },
2814 { Hexagon::BI__builtin_HEXAGON_S4_lsli, {{ 0, true, 6, 0 }} },
2815 { Hexagon::BI__builtin_HEXAGON_S4_ntstbit_i, {{ 1, false, 5, 0 }} },
2816 { Hexagon::BI__builtin_HEXAGON_S4_ori_asl_ri, {{ 2, false, 5, 0 }} },
2817 { Hexagon::BI__builtin_HEXAGON_S4_ori_lsr_ri, {{ 2, false, 5, 0 }} },
2818 { Hexagon::BI__builtin_HEXAGON_S4_subi_asl_ri, {{ 2, false, 5, 0 }} },
2819 { Hexagon::BI__builtin_HEXAGON_S4_subi_lsr_ri, {{ 2, false, 5, 0 }} },
2820 { Hexagon::BI__builtin_HEXAGON_S4_vrcrotate_acc, {{ 3, false, 2, 0 }} },
2821 { Hexagon::BI__builtin_HEXAGON_S4_vrcrotate, {{ 2, false, 2, 0 }} },
2822 { Hexagon::BI__builtin_HEXAGON_S5_asrhub_rnd_sat_goodsyntax,
2823 {{ 1, false, 4, 0 }} },
2824 { Hexagon::BI__builtin_HEXAGON_S5_asrhub_sat, {{ 1, false, 4, 0 }} },
2825 { Hexagon::BI__builtin_HEXAGON_S5_vasrhrnd_goodsyntax,
2826 {{ 1, false, 4, 0 }} },
2827 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p, {{ 1, false, 6, 0 }} },
2828 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_acc, {{ 2, false, 6, 0 }} },
2829 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_and, {{ 2, false, 6, 0 }} },
2830 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_nac, {{ 2, false, 6, 0 }} },
2831 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_or, {{ 2, false, 6, 0 }} },
2832 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_p_xacc, {{ 2, false, 6, 0 }} },
2833 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r, {{ 1, false, 5, 0 }} },
2834 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_acc, {{ 2, false, 5, 0 }} },
2835 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_and, {{ 2, false, 5, 0 }} },
2836 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_nac, {{ 2, false, 5, 0 }} },
2837 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_or, {{ 2, false, 5, 0 }} },
2838 { Hexagon::BI__builtin_HEXAGON_S6_rol_i_r_xacc, {{ 2, false, 5, 0 }} },
2839 { Hexagon::BI__builtin_HEXAGON_V6_valignbi, {{ 2, false, 3, 0 }} },
2840 { Hexagon::BI__builtin_HEXAGON_V6_valignbi_128B, {{ 2, false, 3, 0 }} },
2841 { Hexagon::BI__builtin_HEXAGON_V6_vlalignbi, {{ 2, false, 3, 0 }} },
2842 { Hexagon::BI__builtin_HEXAGON_V6_vlalignbi_128B, {{ 2, false, 3, 0 }} },
2843 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi, {{ 2, false, 1, 0 }} },
2844 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_128B, {{ 2, false, 1, 0 }} },
2845 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_acc, {{ 3, false, 1, 0 }} },
2846 { Hexagon::BI__builtin_HEXAGON_V6_vrmpybusi_acc_128B,
2847 {{ 3, false, 1, 0 }} },
2848 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi, {{ 2, false, 1, 0 }} },
2849 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_128B, {{ 2, false, 1, 0 }} },
2850 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_acc, {{ 3, false, 1, 0 }} },
2851 { Hexagon::BI__builtin_HEXAGON_V6_vrmpyubi_acc_128B,
2852 {{ 3, false, 1, 0 }} },
2853 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi, {{ 2, false, 1, 0 }} },
2854 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_128B, {{ 2, false, 1, 0 }} },
2855 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_acc, {{ 3, false, 1, 0 }} },
2856 { Hexagon::BI__builtin_HEXAGON_V6_vrsadubi_acc_128B,
2857 {{ 3, false, 1, 0 }} },
2858 };
2859
2860 // Use a dynamically initialized static to sort the table exactly once on
2861 // first run.
2862 static const bool SortOnce =
2863 (llvm::sort(Infos,
2864 [](const BuiltinInfo &LHS, const BuiltinInfo &RHS) {
2865 return LHS.BuiltinID < RHS.BuiltinID;
2866 }),
2867 true);
2868 (void)SortOnce;
2869
2870 const BuiltinInfo *F =
2871 std::lower_bound(std::begin(Infos), std::end(Infos), BuiltinID,
2872 [](const BuiltinInfo &BI, unsigned BuiltinID) {
2873 return BI.BuiltinID < BuiltinID;
2874 });
2875 if (F == std::end(Infos) || F->BuiltinID != BuiltinID)
2876 return false;
2877
2878 bool Error = false;
2879
2880 for (const ArgInfo &A : F->Infos) {
2881 // Ignore empty ArgInfo elements.
2882 if (A.BitWidth == 0)
2883 continue;
2884
2885 int32_t Min = A.IsSigned ? -(1 << (A.BitWidth - 1)) : 0;
2886 int32_t Max = (1 << (A.IsSigned ? A.BitWidth - 1 : A.BitWidth)) - 1;
2887 if (!A.Align) {
2888 Error |= SemaBuiltinConstantArgRange(TheCall, A.OpNum, Min, Max);
2889 } else {
2890 unsigned M = 1 << A.Align;
2891 Min *= M;
2892 Max *= M;
2893 Error |= SemaBuiltinConstantArgRange(TheCall, A.OpNum, Min, Max) |
2894 SemaBuiltinConstantArgMultiple(TheCall, A.OpNum, M);
2895 }
2896 }
2897 return Error;
2898 }
2899
2900 bool Sema::CheckHexagonBuiltinFunctionCall(unsigned BuiltinID,
2901 CallExpr *TheCall) {
2902 return CheckHexagonBuiltinCpu(BuiltinID, TheCall) ||
2903 CheckHexagonBuiltinArgument(BuiltinID, TheCall);
2904 }
2905
2906
2907 // CheckMipsBuiltinFunctionCall - Checks the constant value passed to the
2908 // intrinsic is correct. The switch statement is ordered by DSP, MSA. The
2909 // ordering for DSP is unspecified. MSA is ordered by the data format used
2910 // by the underlying instruction i.e., df/m, df/n and then by size.
2911 //
2912 // FIXME: The size tests here should instead be tablegen'd along with the
2913 // definitions from include/clang/Basic/BuiltinsMips.def.
2914 // FIXME: GCC is strict on signedness for some of these intrinsics, we should
2915 // be too.
2916 bool Sema::CheckMipsBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
2917 unsigned i = 0, l = 0, u = 0, m = 0;
2918 switch (BuiltinID) {
2919 default: return false;
2920 case Mips::BI__builtin_mips_wrdsp: i = 1; l = 0; u = 63; break;
2921 case Mips::BI__builtin_mips_rddsp: i = 0; l = 0; u = 63; break;
2922 case Mips::BI__builtin_mips_append: i = 2; l = 0; u = 31; break;
2923 case Mips::BI__builtin_mips_balign: i = 2; l = 0; u = 3; break;
2924 case Mips::BI__builtin_mips_precr_sra_ph_w: i = 2; l = 0; u = 31; break;
2925 case Mips::BI__builtin_mips_precr_sra_r_ph_w: i = 2; l = 0; u = 31; break;
2926 case Mips::BI__builtin_mips_prepend: i = 2; l = 0; u = 31; break;
2927 // MSA intrinsics. Instructions (which the intrinsics maps to) which use the
2928 // df/m field.
2929 // These intrinsics take an unsigned 3 bit immediate.
2930 case Mips::BI__builtin_msa_bclri_b:
2931 case Mips::BI__builtin_msa_bnegi_b:
2932 case Mips::BI__builtin_msa_bseti_b:
2933 case Mips::BI__builtin_msa_sat_s_b:
2934 case Mips::BI__builtin_msa_sat_u_b:
2935 case Mips::BI__builtin_msa_slli_b:
2936 case Mips::BI__builtin_msa_srai_b:
2937 case Mips::BI__builtin_msa_srari_b:
2938 case Mips::BI__builtin_msa_srli_b:
2939 case Mips::BI__builtin_msa_srlri_b: i = 1; l = 0; u = 7; break;
2940 case Mips::BI__builtin_msa_binsli_b:
2941 case Mips::BI__builtin_msa_binsri_b: i = 2; l = 0; u = 7; break;
2942 // These intrinsics take an unsigned 4 bit immediate.
2943 case Mips::BI__builtin_msa_bclri_h:
2944 case Mips::BI__builtin_msa_bnegi_h:
2945 case Mips::BI__builtin_msa_bseti_h:
2946 case Mips::BI__builtin_msa_sat_s_h:
2947 case Mips::BI__builtin_msa_sat_u_h:
2948 case Mips::BI__builtin_msa_slli_h:
2949 case Mips::BI__builtin_msa_srai_h:
2950 case Mips::BI__builtin_msa_srari_h:
2951 case Mips::BI__builtin_msa_srli_h:
2952 case Mips::BI__builtin_msa_srlri_h: i = 1; l = 0; u = 15; break;
2953 case Mips::BI__builtin_msa_binsli_h:
2954 case Mips::BI__builtin_msa_binsri_h: i = 2; l = 0; u = 15; break;
2955 // These intrinsics take an unsigned 5 bit immediate.
2956 // The first block of intrinsics actually have an unsigned 5 bit field,
2957 // not a df/n field.
2958 case Mips::BI__builtin_msa_clei_u_b:
2959 case Mips::BI__builtin_msa_clei_u_h:
2960 case Mips::BI__builtin_msa_clei_u_w:
2961 case Mips::BI__builtin_msa_clei_u_d:
2962 case Mips::BI__builtin_msa_clti_u_b:
2963 case Mips::BI__builtin_msa_clti_u_h:
2964 case Mips::BI__builtin_msa_clti_u_w:
2965 case Mips::BI__builtin_msa_clti_u_d:
2966 case Mips::BI__builtin_msa_maxi_u_b:
2967 case Mips::BI__builtin_msa_maxi_u_h:
2968 case Mips::BI__builtin_msa_maxi_u_w:
2969 case Mips::BI__builtin_msa_maxi_u_d:
2970 case Mips::BI__builtin_msa_mini_u_b:
2971 case Mips::BI__builtin_msa_mini_u_h:
2972 case Mips::BI__builtin_msa_mini_u_w:
2973 case Mips::BI__builtin_msa_mini_u_d:
2974 case Mips::BI__builtin_msa_addvi_b:
2975 case Mips::BI__builtin_msa_addvi_h:
2976 case Mips::BI__builtin_msa_addvi_w:
2977 case Mips::BI__builtin_msa_addvi_d:
2978 case Mips::BI__builtin_msa_bclri_w:
2979 case Mips::BI__builtin_msa_bnegi_w:
2980 case Mips::BI__builtin_msa_bseti_w:
2981 case Mips::BI__builtin_msa_sat_s_w:
2982 case Mips::BI__builtin_msa_sat_u_w:
2983 case Mips::BI__builtin_msa_slli_w:
2984 case Mips::BI__builtin_msa_srai_w:
2985 case Mips::BI__builtin_msa_srari_w:
2986 case Mips::BI__builtin_msa_srli_w:
2987 case Mips::BI__builtin_msa_srlri_w:
2988 case Mips::BI__builtin_msa_subvi_b:
2989 case Mips::BI__builtin_msa_subvi_h:
2990 case Mips::BI__builtin_msa_subvi_w:
2991 case Mips::BI__builtin_msa_subvi_d: i = 1; l = 0; u = 31; break;
2992 case Mips::BI__builtin_msa_binsli_w:
2993 case Mips::BI__builtin_msa_binsri_w: i = 2; l = 0; u = 31; break;
2994 // These intrinsics take an unsigned 6 bit immediate.
2995 case Mips::BI__builtin_msa_bclri_d:
2996 case Mips::BI__builtin_msa_bnegi_d:
2997 case Mips::BI__builtin_msa_bseti_d:
2998 case Mips::BI__builtin_msa_sat_s_d:
2999 case Mips::BI__builtin_msa_sat_u_d:
3000 case Mips::BI__builtin_msa_slli_d:
3001 case Mips::BI__builtin_msa_srai_d:
3002 case Mips::BI__builtin_msa_srari_d:
3003 case Mips::BI__builtin_msa_srli_d:
3004 case Mips::BI__builtin_msa_srlri_d: i = 1; l = 0; u = 63; break;
3005 case Mips::BI__builtin_msa_binsli_d:
3006 case Mips::BI__builtin_msa_binsri_d: i = 2; l = 0; u = 63; break;
3007 // These intrinsics take a signed 5 bit immediate.
3008 case Mips::BI__builtin_msa_ceqi_b:
3009 case Mips::BI__builtin_msa_ceqi_h:
3010 case Mips::BI__builtin_msa_ceqi_w:
3011 case Mips::BI__builtin_msa_ceqi_d:
3012 case Mips::BI__builtin_msa_clti_s_b:
3013 case Mips::BI__builtin_msa_clti_s_h:
3014 case Mips::BI__builtin_msa_clti_s_w:
3015 case Mips::BI__builtin_msa_clti_s_d:
3016 case Mips::BI__builtin_msa_clei_s_b:
3017 case Mips::BI__builtin_msa_clei_s_h:
3018 case Mips::BI__builtin_msa_clei_s_w:
3019 case Mips::BI__builtin_msa_clei_s_d:
3020 case Mips::BI__builtin_msa_maxi_s_b:
3021 case Mips::BI__builtin_msa_maxi_s_h:
3022 case Mips::BI__builtin_msa_maxi_s_w:
3023 case Mips::BI__builtin_msa_maxi_s_d:
3024 case Mips::BI__builtin_msa_mini_s_b:
3025 case Mips::BI__builtin_msa_mini_s_h:
3026 case Mips::BI__builtin_msa_mini_s_w:
3027 case Mips::BI__builtin_msa_mini_s_d: i = 1; l = -16; u = 15; break;
3028 // These intrinsics take an unsigned 8 bit immediate.
3029 case Mips::BI__builtin_msa_andi_b:
3030 case Mips::BI__builtin_msa_nori_b:
3031 case Mips::BI__builtin_msa_ori_b:
3032 case Mips::BI__builtin_msa_shf_b:
3033 case Mips::BI__builtin_msa_shf_h:
3034 case Mips::BI__builtin_msa_shf_w:
3035 case Mips::BI__builtin_msa_xori_b: i = 1; l = 0; u = 255; break;
3036 case Mips::BI__builtin_msa_bseli_b:
3037 case Mips::BI__builtin_msa_bmnzi_b:
3038 case Mips::BI__builtin_msa_bmzi_b: i = 2; l = 0; u = 255; break;
3039 // df/n format
3040 // These intrinsics take an unsigned 4 bit immediate.
3041 case Mips::BI__builtin_msa_copy_s_b:
3042 case Mips::BI__builtin_msa_copy_u_b:
3043 case Mips::BI__builtin_msa_insve_b:
3044 case Mips::BI__builtin_msa_splati_b: i = 1; l = 0; u = 15; break;
3045 case Mips::BI__builtin_msa_sldi_b: i = 2; l = 0; u = 15; break;
3046 // These intrinsics take an unsigned 3 bit immediate.
3047 case Mips::BI__builtin_msa_copy_s_h:
3048 case Mips::BI__builtin_msa_copy_u_h:
3049 case Mips::BI__builtin_msa_insve_h:
3050 case Mips::BI__builtin_msa_splati_h: i = 1; l = 0; u = 7; break;
3051 case Mips::BI__builtin_msa_sldi_h: i = 2; l = 0; u = 7; break;
3052 // These intrinsics take an unsigned 2 bit immediate.
3053 case Mips::BI__builtin_msa_copy_s_w:
3054 case Mips::BI__builtin_msa_copy_u_w:
3055 case Mips::BI__builtin_msa_insve_w:
3056 case Mips::BI__builtin_msa_splati_w: i = 1; l = 0; u = 3; break;
3057 case Mips::BI__builtin_msa_sldi_w: i = 2; l = 0; u = 3; break;
3058 // These intrinsics take an unsigned 1 bit immediate.
3059 case Mips::BI__builtin_msa_copy_s_d:
3060 case Mips::BI__builtin_msa_copy_u_d:
3061 case Mips::BI__builtin_msa_insve_d:
3062 case Mips::BI__builtin_msa_splati_d: i = 1; l = 0; u = 1; break;
3063 case Mips::BI__builtin_msa_sldi_d: i = 2; l = 0; u = 1; break;
3064 // Memory offsets and immediate loads.
3065 // These intrinsics take a signed 10 bit immediate.
3066 case Mips::BI__builtin_msa_ldi_b: i = 0; l = -128; u = 255; break;
3067 case Mips::BI__builtin_msa_ldi_h:
3068 case Mips::BI__builtin_msa_ldi_w:
3069 case Mips::BI__builtin_msa_ldi_d: i = 0; l = -512; u = 511; break;
3070 case Mips::BI__builtin_msa_ld_b: i = 1; l = -512; u = 511; m = 1; break;
3071 case Mips::BI__builtin_msa_ld_h: i = 1; l = -1024; u = 1022; m = 2; break;
3072 case Mips::BI__builtin_msa_ld_w: i = 1; l = -2048; u = 2044; m = 4; break;
3073 case Mips::BI__builtin_msa_ld_d: i = 1; l = -4096; u = 4088; m = 8; break;
3074 case Mips::BI__builtin_msa_st_b: i = 2; l = -512; u = 511; m = 1; break;
3075 case Mips::BI__builtin_msa_st_h: i = 2; l = -1024; u = 1022; m = 2; break;
3076 case Mips::BI__builtin_msa_st_w: i = 2; l = -2048; u = 2044; m = 4; break;
3077 case Mips::BI__builtin_msa_st_d: i = 2; l = -4096; u = 4088; m = 8; break;
3078 }
3079
3080 if (!m)
3081 return SemaBuiltinConstantArgRange(TheCall, i, l, u);
3082
3083 return SemaBuiltinConstantArgRange(TheCall, i, l, u) ||
3084 SemaBuiltinConstantArgMultiple(TheCall, i, m);
3085 }
3086
3087 bool Sema::CheckPPCBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
3088 unsigned i = 0, l = 0, u = 0;
3089 bool Is64BitBltin = BuiltinID == PPC::BI__builtin_divde ||
3090 BuiltinID == PPC::BI__builtin_divdeu ||
3091 BuiltinID == PPC::BI__builtin_bpermd;
3092 bool IsTarget64Bit = Context.getTargetInfo()
3093 .getTypeWidth(Context
3094 .getTargetInfo()
3095 .getIntPtrType()) == 64;
3096 bool IsBltinExtDiv = BuiltinID == PPC::BI__builtin_divwe ||
3097 BuiltinID == PPC::BI__builtin_divweu ||
3098 BuiltinID == PPC::BI__builtin_divde ||
3099 BuiltinID == PPC::BI__builtin_divdeu;
3100
3101 if (Is64BitBltin && !IsTarget64Bit)
3102 return Diag(TheCall->getBeginLoc(), diag::err_64_bit_builtin_32_bit_tgt)
3103 << TheCall->getSourceRange();
3104
3105 if ((IsBltinExtDiv && !Context.getTargetInfo().hasFeature("extdiv")) ||
3106 (BuiltinID == PPC::BI__builtin_bpermd &&
3107 !Context.getTargetInfo().hasFeature("bpermd")))
3108 return Diag(TheCall->getBeginLoc(), diag::err_ppc_builtin_only_on_pwr7)
3109 << TheCall->getSourceRange();
3110
3111 auto SemaVSXCheck = [&](CallExpr *TheCall) -> bool {
3112 if (!Context.getTargetInfo().hasFeature("vsx"))
3113 return Diag(TheCall->getBeginLoc(), diag::err_ppc_builtin_only_on_pwr7)
3114 << TheCall->getSourceRange();
3115 return false;
3116 };
3117
3118 switch (BuiltinID) {
3119 default: return false;
3120 case PPC::BI__builtin_altivec_crypto_vshasigmaw:
3121 case PPC::BI__builtin_altivec_crypto_vshasigmad:
3122 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1) ||
3123 SemaBuiltinConstantArgRange(TheCall, 2, 0, 15);
3124 case PPC::BI__builtin_tbegin:
3125 case PPC::BI__builtin_tend: i = 0; l = 0; u = 1; break;
3126 case PPC::BI__builtin_tsr: i = 0; l = 0; u = 7; break;
3127 case PPC::BI__builtin_tabortwc:
3128 case PPC::BI__builtin_tabortdc: i = 0; l = 0; u = 31; break;
3129 case PPC::BI__builtin_tabortwci:
3130 case PPC::BI__builtin_tabortdci:
3131 return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31) ||
3132 SemaBuiltinConstantArgRange(TheCall, 2, 0, 31);
3133 case PPC::BI__builtin_vsx_xxpermdi:
3134 case PPC::BI__builtin_vsx_xxsldwi:
3135 return SemaBuiltinVSX(TheCall);
3136 case PPC::BI__builtin_unpack_vector_int128:
3137 return SemaVSXCheck(TheCall) ||
3138 SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
3139 case PPC::BI__builtin_pack_vector_int128:
3140 return SemaVSXCheck(TheCall);
3141 }
3142 return SemaBuiltinConstantArgRange(TheCall, i, l, u);
3143 }
3144
3145 bool Sema::CheckSystemZBuiltinFunctionCall(unsigned BuiltinID,
3146 CallExpr *TheCall) {
3147 if (BuiltinID == SystemZ::BI__builtin_tabort) {
3148 Expr *Arg = TheCall->getArg(0);
3149 llvm::APSInt AbortCode(32);
3150 if (Arg->isIntegerConstantExpr(AbortCode, Context) &&
3151 AbortCode.getSExtValue() >= 0 && AbortCode.getSExtValue() < 256)
3152 return Diag(Arg->getBeginLoc(), diag::err_systemz_invalid_tabort_code)
3153 << Arg->getSourceRange();
3154 }
3155
3156 // For intrinsics which take an immediate value as part of the instruction,
3157 // range check them here.
3158 unsigned i = 0, l = 0, u = 0;
3159 switch (BuiltinID) {
3160 default: return false;
3161 case SystemZ::BI__builtin_s390_lcbb: i = 1; l = 0; u = 15; break;
3162 case SystemZ::BI__builtin_s390_verimb:
3163 case SystemZ::BI__builtin_s390_verimh:
3164 case SystemZ::BI__builtin_s390_verimf:
3165 case SystemZ::BI__builtin_s390_verimg: i = 3; l = 0; u = 255; break;
3166 case SystemZ::BI__builtin_s390_vfaeb:
3167 case SystemZ::BI__builtin_s390_vfaeh:
3168 case SystemZ::BI__builtin_s390_vfaef:
3169 case SystemZ::BI__builtin_s390_vfaebs:
3170 case SystemZ::BI__builtin_s390_vfaehs:
3171 case SystemZ::BI__builtin_s390_vfaefs:
3172 case SystemZ::BI__builtin_s390_vfaezb:
3173 case SystemZ::BI__builtin_s390_vfaezh:
3174 case SystemZ::BI__builtin_s390_vfaezf:
3175 case SystemZ::BI__builtin_s390_vfaezbs:
3176 case SystemZ::BI__builtin_s390_vfaezhs:
3177 case SystemZ::BI__builtin_s390_vfaezfs: i = 2; l = 0; u = 15; break;
3178 case SystemZ::BI__builtin_s390_vfisb:
3179 case SystemZ::BI__builtin_s390_vfidb:
3180 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15) ||
3181 SemaBuiltinConstantArgRange(TheCall, 2, 0, 15);
3182 case SystemZ::BI__builtin_s390_vftcisb:
3183 case SystemZ::BI__builtin_s390_vftcidb: i = 1; l = 0; u = 4095; break;
3184 case SystemZ::BI__builtin_s390_vlbb: i = 1; l = 0; u = 15; break;
3185 case SystemZ::BI__builtin_s390_vpdi: i = 2; l = 0; u = 15; break;
3186 case SystemZ::BI__builtin_s390_vsldb: i = 2; l = 0; u = 15; break;
3187 case SystemZ::BI__builtin_s390_vstrcb:
3188 case SystemZ::BI__builtin_s390_vstrch:
3189 case SystemZ::BI__builtin_s390_vstrcf:
3190 case SystemZ::BI__builtin_s390_vstrczb:
3191 case SystemZ::BI__builtin_s390_vstrczh:
3192 case SystemZ::BI__builtin_s390_vstrczf:
3193 case SystemZ::BI__builtin_s390_vstrcbs:
3194 case SystemZ::BI__builtin_s390_vstrchs:
3195 case SystemZ::BI__builtin_s390_vstrcfs:
3196 case SystemZ::BI__builtin_s390_vstrczbs:
3197 case SystemZ::BI__builtin_s390_vstrczhs:
3198 case SystemZ::BI__builtin_s390_vstrczfs: i = 3; l = 0; u = 15; break;
3199 case SystemZ::BI__builtin_s390_vmslg: i = 3; l = 0; u = 15; break;
3200 case SystemZ::BI__builtin_s390_vfminsb:
3201 case SystemZ::BI__builtin_s390_vfmaxsb:
3202 case SystemZ::BI__builtin_s390_vfmindb:
3203 case SystemZ::BI__builtin_s390_vfmaxdb: i = 2; l = 0; u = 15; break;
3204 }
3205 return SemaBuiltinConstantArgRange(TheCall, i, l, u);
3206 }
3207
3208 /// SemaBuiltinCpuSupports - Handle __builtin_cpu_supports(char *).
3209 /// This checks that the target supports __builtin_cpu_supports and
3210 /// that the string argument is constant and valid.
3211 static bool SemaBuiltinCpuSupports(Sema &S, CallExpr *TheCall) {
3212 Expr *Arg = TheCall->getArg(0);
3213
3214 // Check if the argument is a string literal.
3215 if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
3216 return S.Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
3217 << Arg->getSourceRange();
3218
3219 // Check the contents of the string.
3220 StringRef Feature =
3221 cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
3222 if (!S.Context.getTargetInfo().validateCpuSupports(Feature))
3223 return S.Diag(TheCall->getBeginLoc(), diag::err_invalid_cpu_supports)
3224 << Arg->getSourceRange();
3225 return false;
3226 }
3227
3228 /// SemaBuiltinCpuIs - Handle __builtin_cpu_is(char *).
3229 /// This checks that the target supports __builtin_cpu_is and
3230 /// that the string argument is constant and valid.
3231 static bool SemaBuiltinCpuIs(Sema &S, CallExpr *TheCall) {
3232 Expr *Arg = TheCall->getArg(0);
3233
3234 // Check if the argument is a string literal.
3235 if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
3236 return S.Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
3237 << Arg->getSourceRange();
3238
3239 // Check the contents of the string.
3240 StringRef Feature =
3241 cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
3242 if (!S.Context.getTargetInfo().validateCpuIs(Feature))
3243 return S.Diag(TheCall->getBeginLoc(), diag::err_invalid_cpu_is)
3244 << Arg->getSourceRange();
3245 return false;
3246 }
3247
3248 // Check if the rounding mode is legal.
3249 bool Sema::CheckX86BuiltinRoundingOrSAE(unsigned BuiltinID, CallExpr *TheCall) {
3250 // Indicates if this instruction has rounding control or just SAE.
3251 bool HasRC = false;
3252
3253 unsigned ArgNum = 0;
3254 switch (BuiltinID) {
3255 default:
3256 return false;
3257 case X86::BI__builtin_ia32_vcvttsd2si32:
3258 case X86::BI__builtin_ia32_vcvttsd2si64:
3259 case X86::BI__builtin_ia32_vcvttsd2usi32:
3260 case X86::BI__builtin_ia32_vcvttsd2usi64:
3261 case X86::BI__builtin_ia32_vcvttss2si32:
3262 case X86::BI__builtin_ia32_vcvttss2si64:
3263 case X86::BI__builtin_ia32_vcvttss2usi32:
3264 case X86::BI__builtin_ia32_vcvttss2usi64:
3265 ArgNum = 1;
3266 break;
3267 case X86::BI__builtin_ia32_maxpd512:
3268 case X86::BI__builtin_ia32_maxps512:
3269 case X86::BI__builtin_ia32_minpd512:
3270 case X86::BI__builtin_ia32_minps512:
3271 ArgNum = 2;
3272 break;
3273 case X86::BI__builtin_ia32_cvtps2pd512_mask:
3274 case X86::BI__builtin_ia32_cvttpd2dq512_mask:
3275 case X86::BI__builtin_ia32_cvttpd2qq512_mask:
3276 case X86::BI__builtin_ia32_cvttpd2udq512_mask:
3277 case X86::BI__builtin_ia32_cvttpd2uqq512_mask:
3278 case X86::BI__builtin_ia32_cvttps2dq512_mask:
3279 case X86::BI__builtin_ia32_cvttps2qq512_mask:
3280 case X86::BI__builtin_ia32_cvttps2udq512_mask:
3281 case X86::BI__builtin_ia32_cvttps2uqq512_mask:
3282 case X86::BI__builtin_ia32_exp2pd_mask:
3283 case X86::BI__builtin_ia32_exp2ps_mask:
3284 case X86::BI__builtin_ia32_getexppd512_mask:
3285 case X86::BI__builtin_ia32_getexpps512_mask:
3286 case X86::BI__builtin_ia32_rcp28pd_mask:
3287 case X86::BI__builtin_ia32_rcp28ps_mask:
3288 case X86::BI__builtin_ia32_rsqrt28pd_mask:
3289 case X86::BI__builtin_ia32_rsqrt28ps_mask:
3290 case X86::BI__builtin_ia32_vcomisd:
3291 case X86::BI__builtin_ia32_vcomiss:
3292 case X86::BI__builtin_ia32_vcvtph2ps512_mask:
3293 ArgNum = 3;
3294 break;
3295 case X86::BI__builtin_ia32_cmppd512_mask:
3296 case X86::BI__builtin_ia32_cmpps512_mask:
3297 case X86::BI__builtin_ia32_cmpsd_mask:
3298 case X86::BI__builtin_ia32_cmpss_mask:
3299 case X86::BI__builtin_ia32_cvtss2sd_round_mask:
3300 case X86::BI__builtin_ia32_getexpsd128_round_mask:
3301 case X86::BI__builtin_ia32_getexpss128_round_mask:
3302 case X86::BI__builtin_ia32_maxsd_round_mask:
3303 case X86::BI__builtin_ia32_maxss_round_mask:
3304 case X86::BI__builtin_ia32_minsd_round_mask:
3305 case X86::BI__builtin_ia32_minss_round_mask:
3306 case X86::BI__builtin_ia32_rcp28sd_round_mask:
3307 case X86::BI__builtin_ia32_rcp28ss_round_mask:
3308 case X86::BI__builtin_ia32_reducepd512_mask:
3309 case X86::BI__builtin_ia32_reduceps512_mask:
3310 case X86::BI__builtin_ia32_rndscalepd_mask:
3311 case X86::BI__builtin_ia32_rndscaleps_mask:
3312 case X86::BI__builtin_ia32_rsqrt28sd_round_mask:
3313 case X86::BI__builtin_ia32_rsqrt28ss_round_mask:
3314 ArgNum = 4;
3315 break;
3316 case X86::BI__builtin_ia32_fixupimmpd512_mask:
3317 case X86::BI__builtin_ia32_fixupimmpd512_maskz:
3318 case X86::BI__builtin_ia32_fixupimmps512_mask:
3319 case X86::BI__builtin_ia32_fixupimmps512_maskz:
3320 case X86::BI__builtin_ia32_fixupimmsd_mask:
3321 case X86::BI__builtin_ia32_fixupimmsd_maskz:
3322 case X86::BI__builtin_ia32_fixupimmss_mask:
3323 case X86::BI__builtin_ia32_fixupimmss_maskz:
3324 case X86::BI__builtin_ia32_rangepd512_mask:
3325 case X86::BI__builtin_ia32_rangeps512_mask:
3326 case X86::BI__builtin_ia32_rangesd128_round_mask:
3327 case X86::BI__builtin_ia32_rangess128_round_mask:
3328 case X86::BI__builtin_ia32_reducesd_mask:
3329 case X86::BI__builtin_ia32_reducess_mask:
3330 case X86::BI__builtin_ia32_rndscalesd_round_mask:
3331 case X86::BI__builtin_ia32_rndscaless_round_mask:
3332 ArgNum = 5;
3333 break;
3334 case X86::BI__builtin_ia32_vcvtsd2si64:
3335 case X86::BI__builtin_ia32_vcvtsd2si32:
3336 case X86::BI__builtin_ia32_vcvtsd2usi32:
3337 case X86::BI__builtin_ia32_vcvtsd2usi64:
3338 case X86::BI__builtin_ia32_vcvtss2si32:
3339 case X86::BI__builtin_ia32_vcvtss2si64:
3340 case X86::BI__builtin_ia32_vcvtss2usi32:
3341 case X86::BI__builtin_ia32_vcvtss2usi64:
3342 case X86::BI__builtin_ia32_sqrtpd512:
3343 case X86::BI__builtin_ia32_sqrtps512:
3344 ArgNum = 1;
3345 HasRC = true;
3346 break;
3347 case X86::BI__builtin_ia32_addpd512:
3348 case X86::BI__builtin_ia32_addps512:
3349 case X86::BI__builtin_ia32_divpd512:
3350 case X86::BI__builtin_ia32_divps512:
3351 case X86::BI__builtin_ia32_mulpd512:
3352 case X86::BI__builtin_ia32_mulps512:
3353 case X86::BI__builtin_ia32_subpd512:
3354 case X86::BI__builtin_ia32_subps512:
3355 case X86::BI__builtin_ia32_cvtsi2sd64:
3356 case X86::BI__builtin_ia32_cvtsi2ss32:
3357 case X86::BI__builtin_ia32_cvtsi2ss64:
3358 case X86::BI__builtin_ia32_cvtusi2sd64:
3359 case X86::BI__builtin_ia32_cvtusi2ss32:
3360 case X86::BI__builtin_ia32_cvtusi2ss64:
3361 ArgNum = 2;
3362 HasRC = true;
3363 break;
3364 case X86::BI__builtin_ia32_cvtdq2ps512_mask:
3365 case X86::BI__builtin_ia32_cvtudq2ps512_mask:
3366 case X86::BI__builtin_ia32_cvtpd2ps512_mask:
3367 case X86::BI__builtin_ia32_cvtpd2qq512_mask:
3368 case X86::BI__builtin_ia32_cvtpd2uqq512_mask:
3369 case X86::BI__builtin_ia32_cvtps2qq512_mask:
3370 case X86::BI__builtin_ia32_cvtps2uqq512_mask:
3371 case X86::BI__builtin_ia32_cvtqq2pd512_mask:
3372 case X86::BI__builtin_ia32_cvtqq2ps512_mask:
3373 case X86::BI__builtin_ia32_cvtuqq2pd512_mask:
3374 case X86::BI__builtin_ia32_cvtuqq2ps512_mask:
3375 ArgNum = 3;
3376 HasRC = true;
3377 break;
3378 case X86::BI__builtin_ia32_addss_round_mask:
3379 case X86::BI__builtin_ia32_addsd_round_mask:
3380 case X86::BI__builtin_ia32_divss_round_mask:
3381 case X86::BI__builtin_ia32_divsd_round_mask:
3382 case X86::BI__builtin_ia32_mulss_round_mask:
3383 case X86::BI__builtin_ia32_mulsd_round_mask:
3384 case X86::BI__builtin_ia32_subss_round_mask:
3385 case X86::BI__builtin_ia32_subsd_round_mask:
3386 case X86::BI__builtin_ia32_scalefpd512_mask:
3387 case X86::BI__builtin_ia32_scalefps512_mask:
3388 case X86::BI__builtin_ia32_scalefsd_round_mask:
3389 case X86::BI__builtin_ia32_scalefss_round_mask:
3390 case X86::BI__builtin_ia32_getmantpd512_mask:
3391 case X86::BI__builtin_ia32_getmantps512_mask:
3392 case X86::BI__builtin_ia32_cvtsd2ss_round_mask:
3393 case X86::BI__builtin_ia32_sqrtsd_round_mask:
3394 case X86::BI__builtin_ia32_sqrtss_round_mask:
3395 case X86::BI__builtin_ia32_vfmaddsd3_mask:
3396 case X86::BI__builtin_ia32_vfmaddsd3_maskz:
3397 case X86::BI__builtin_ia32_vfmaddsd3_mask3:
3398 case X86::BI__builtin_ia32_vfmaddss3_mask:
3399 case X86::BI__builtin_ia32_vfmaddss3_maskz:
3400 case X86::BI__builtin_ia32_vfmaddss3_mask3:
3401 case X86::BI__builtin_ia32_vfmaddpd512_mask:
3402 case X86::BI__builtin_ia32_vfmaddpd512_maskz:
3403 case X86::BI__builtin_ia32_vfmaddpd512_mask3:
3404 case X86::BI__builtin_ia32_vfmsubpd512_mask3:
3405 case X86::BI__builtin_ia32_vfmaddps512_mask:
3406 case X86::BI__builtin_ia32_vfmaddps512_maskz:
3407 case X86::BI__builtin_ia32_vfmaddps512_mask3:
3408 case X86::BI__builtin_ia32_vfmsubps512_mask3:
3409 case X86::BI__builtin_ia32_vfmaddsubpd512_mask:
3410 case X86::BI__builtin_ia32_vfmaddsubpd512_maskz:
3411 case X86::BI__builtin_ia32_vfmaddsubpd512_mask3:
3412 case X86::BI__builtin_ia32_vfmsubaddpd512_mask3:
3413 case X86::BI__builtin_ia32_vfmaddsubps512_mask:
3414 case X86::BI__builtin_ia32_vfmaddsubps512_maskz:
3415 case X86::BI__builtin_ia32_vfmaddsubps512_mask3:
3416 case X86::BI__builtin_ia32_vfmsubaddps512_mask3:
3417 ArgNum = 4;
3418 HasRC = true;
3419 break;
3420 case X86::BI__builtin_ia32_getmantsd_round_mask:
3421 case X86::BI__builtin_ia32_getmantss_round_mask:
3422 ArgNum = 5;
3423 HasRC = true;
3424 break;
3425 }
3426
3427 llvm::APSInt Result;
3428
3429 // We can't check the value of a dependent argument.
3430 Expr *Arg = TheCall->getArg(ArgNum);
3431 if (Arg->isTypeDependent() || Arg->isValueDependent())
3432 return false;
3433
3434 // Check constant-ness first.
3435 if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
3436 return true;
3437
3438 // Make sure rounding mode is either ROUND_CUR_DIRECTION or ROUND_NO_EXC bit
3439 // is set. If the intrinsic has rounding control(bits 1:0), make sure its only
3440 // combined with ROUND_NO_EXC.
3441 if (Result == 4/*ROUND_CUR_DIRECTION*/ ||
3442 Result == 8/*ROUND_NO_EXC*/ ||
3443 (HasRC && Result.getZExtValue() >= 8 && Result.getZExtValue() <= 11))
3444 return false;
3445
3446 return Diag(TheCall->getBeginLoc(), diag::err_x86_builtin_invalid_rounding)
3447 << Arg->getSourceRange();
3448 }
3449
3450 // Check if the gather/scatter scale is legal.
3451 bool Sema::CheckX86BuiltinGatherScatterScale(unsigned BuiltinID,
3452 CallExpr *TheCall) {
3453 unsigned ArgNum = 0;
3454 switch (BuiltinID) {
3455 default:
3456 return false;
3457 case X86::BI__builtin_ia32_gatherpfdpd:
3458 case X86::BI__builtin_ia32_gatherpfdps:
3459 case X86::BI__builtin_ia32_gatherpfqpd:
3460 case X86::BI__builtin_ia32_gatherpfqps:
3461 case X86::BI__builtin_ia32_scatterpfdpd:
3462 case X86::BI__builtin_ia32_scatterpfdps:
3463 case X86::BI__builtin_ia32_scatterpfqpd:
3464 case X86::BI__builtin_ia32_scatterpfqps:
3465 ArgNum = 3;
3466 break;
3467 case X86::BI__builtin_ia32_gatherd_pd:
3468 case X86::BI__builtin_ia32_gatherd_pd256:
3469 case X86::BI__builtin_ia32_gatherq_pd:
3470 case X86::BI__builtin_ia32_gatherq_pd256:
3471 case X86::BI__builtin_ia32_gatherd_ps:
3472 case X86::BI__builtin_ia32_gatherd_ps256:
3473 case X86::BI__builtin_ia32_gatherq_ps:
3474 case X86::BI__builtin_ia32_gatherq_ps256:
3475 case X86::BI__builtin_ia32_gatherd_q:
3476 case X86::BI__builtin_ia32_gatherd_q256:
3477 case X86::BI__builtin_ia32_gatherq_q:
3478 case X86::BI__builtin_ia32_gatherq_q256:
3479 case X86::BI__builtin_ia32_gatherd_d:
3480 case X86::BI__builtin_ia32_gatherd_d256:
3481 case X86::BI__builtin_ia32_gatherq_d:
3482 case X86::BI__builtin_ia32_gatherq_d256:
3483 case X86::BI__builtin_ia32_gather3div2df:
3484 case X86::BI__builtin_ia32_gather3div2di:
3485 case X86::BI__builtin_ia32_gather3div4df:
3486 case X86::BI__builtin_ia32_gather3div4di:
3487 case X86::BI__builtin_ia32_gather3div4sf:
3488 case X86::BI__builtin_ia32_gather3div4si:
3489 case X86::BI__builtin_ia32_gather3div8sf:
3490 case X86::BI__builtin_ia32_gather3div8si:
3491 case X86::BI__builtin_ia32_gather3siv2df:
3492 case X86::BI__builtin_ia32_gather3siv2di:
3493 case X86::BI__builtin_ia32_gather3siv4df:
3494 case X86::BI__builtin_ia32_gather3siv4di:
3495 case X86::BI__builtin_ia32_gather3siv4sf:
3496 case X86::BI__builtin_ia32_gather3siv4si:
3497 case X86::BI__builtin_ia32_gather3siv8sf:
3498 case X86::BI__builtin_ia32_gather3siv8si:
3499 case X86::BI__builtin_ia32_gathersiv8df:
3500 case X86::BI__builtin_ia32_gathersiv16sf:
3501 case X86::BI__builtin_ia32_gatherdiv8df:
3502 case X86::BI__builtin_ia32_gatherdiv16sf:
3503 case X86::BI__builtin_ia32_gathersiv8di:
3504 case X86::BI__builtin_ia32_gathersiv16si:
3505 case X86::BI__builtin_ia32_gatherdiv8di:
3506 case X86::BI__builtin_ia32_gatherdiv16si:
3507 case X86::BI__builtin_ia32_scatterdiv2df:
3508 case X86::BI__builtin_ia32_scatterdiv2di:
3509 case X86::BI__builtin_ia32_scatterdiv4df:
3510 case X86::BI__builtin_ia32_scatterdiv4di:
3511 case X86::BI__builtin_ia32_scatterdiv4sf:
3512 case X86::BI__builtin_ia32_scatterdiv4si:
3513 case X86::BI__builtin_ia32_scatterdiv8sf:
3514 case X86::BI__builtin_ia32_scatterdiv8si:
3515 case X86::BI__builtin_ia32_scattersiv2df:
3516 case X86::BI__builtin_ia32_scattersiv2di:
3517 case X86::BI__builtin_ia32_scattersiv4df:
3518 case X86::BI__builtin_ia32_scattersiv4di:
3519 case X86::BI__builtin_ia32_scattersiv4sf:
3520 case X86::BI__builtin_ia32_scattersiv4si:
3521 case X86::BI__builtin_ia32_scattersiv8sf:
3522 case X86::BI__builtin_ia32_scattersiv8si:
3523 case X86::BI__builtin_ia32_scattersiv8df:
3524 case X86::BI__builtin_ia32_scattersiv16sf:
3525 case X86::BI__builtin_ia32_scatterdiv8df:
3526 case X86::BI__builtin_ia32_scatterdiv16sf:
3527 case X86::BI__builtin_ia32_scattersiv8di:
3528 case X86::BI__builtin_ia32_scattersiv16si:
3529 case X86::BI__builtin_ia32_scatterdiv8di:
3530 case X86::BI__builtin_ia32_scatterdiv16si:
3531 ArgNum = 4;
3532 break;
3533 }
3534
3535 llvm::APSInt Result;
3536
3537 // We can't check the value of a dependent argument.
3538 Expr *Arg = TheCall->getArg(ArgNum);
3539 if (Arg->isTypeDependent() || Arg->isValueDependent())
3540 return false;
3541
3542 // Check constant-ness first.
3543 if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
3544 return true;
3545
3546 if (Result == 1 || Result == 2 || Result == 4 || Result == 8)
3547 return false;
3548
3549 return Diag(TheCall->getBeginLoc(), diag::err_x86_builtin_invalid_scale)
3550 << Arg->getSourceRange();
3551 }
3552
3553 static bool isX86_32Builtin(unsigned BuiltinID) {
3554 // These builtins only work on x86-32 targets.
3555 switch (BuiltinID) {
3556 case X86::BI__builtin_ia32_readeflags_u32:
3557 case X86::BI__builtin_ia32_writeeflags_u32:
3558 return true;
3559 }
3560
3561 return false;
3562 }
3563
3564 bool Sema::CheckX86BuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
3565 if (BuiltinID == X86::BI__builtin_cpu_supports)
3566 return SemaBuiltinCpuSupports(*this, TheCall);
3567
3568 if (BuiltinID == X86::BI__builtin_cpu_is)
3569 return SemaBuiltinCpuIs(*this, TheCall);
3570
3571 // Check for 32-bit only builtins on a 64-bit target.
3572 const llvm::Triple &TT = Context.getTargetInfo().getTriple();
3573 if (TT.getArch() != llvm::Triple::x86 && isX86_32Builtin(BuiltinID))
3574 return Diag(TheCall->getCallee()->getBeginLoc(),
3575 diag::err_32_bit_builtin_64_bit_tgt);
3576
3577 // If the intrinsic has rounding or SAE make sure its valid.
3578 if (CheckX86BuiltinRoundingOrSAE(BuiltinID, TheCall))
3579 return true;
3580
3581 // If the intrinsic has a gather/scatter scale immediate make sure its valid.
3582 if (CheckX86BuiltinGatherScatterScale(BuiltinID, TheCall))
3583 return true;
3584
3585 // For intrinsics which take an immediate value as part of the instruction,
3586 // range check them here.
3587 int i = 0, l = 0, u = 0;
3588 switch (BuiltinID) {
3589 default:
3590 return false;
3591 case X86::BI__builtin_ia32_vec_ext_v2si:
3592 case X86::BI__builtin_ia32_vec_ext_v2di:
3593 case X86::BI__builtin_ia32_vextractf128_pd256:
3594 case X86::BI__builtin_ia32_vextractf128_ps256:
3595 case X86::BI__builtin_ia32_vextractf128_si256:
3596 case X86::BI__builtin_ia32_extract128i256:
3597 case X86::BI__builtin_ia32_extractf64x4_mask:
3598 case X86::BI__builtin_ia32_extracti64x4_mask:
3599 case X86::BI__builtin_ia32_extractf32x8_mask:
3600 case X86::BI__builtin_ia32_extracti32x8_mask:
3601 case X86::BI__builtin_ia32_extractf64x2_256_mask:
3602 case X86::BI__builtin_ia32_extracti64x2_256_mask:
3603 case X86::BI__builtin_ia32_extractf32x4_256_mask:
3604 case X86::BI__builtin_ia32_extracti32x4_256_mask:
3605 i = 1; l = 0; u = 1;
3606 break;
3607 case X86::BI__builtin_ia32_vec_set_v2di:
3608 case X86::BI__builtin_ia32_vinsertf128_pd256:
3609 case X86::BI__builtin_ia32_vinsertf128_ps256:
3610 case X86::BI__builtin_ia32_vinsertf128_si256:
3611 case X86::BI__builtin_ia32_insert128i256:
3612 case X86::BI__builtin_ia32_insertf32x8:
3613 case X86::BI__builtin_ia32_inserti32x8:
3614 case X86::BI__builtin_ia32_insertf64x4:
3615 case X86::BI__builtin_ia32_inserti64x4:
3616 case X86::BI__builtin_ia32_insertf64x2_256:
3617 case X86::BI__builtin_ia32_inserti64x2_256:
3618 case X86::BI__builtin_ia32_insertf32x4_256:
3619 case X86::BI__builtin_ia32_inserti32x4_256:
3620 i = 2; l = 0; u = 1;
3621 break;
3622 case X86::BI__builtin_ia32_vpermilpd:
3623 case X86::BI__builtin_ia32_vec_ext_v4hi:
3624 case X86::BI__builtin_ia32_vec_ext_v4si:
3625 case X86::BI__builtin_ia32_vec_ext_v4sf:
3626 case X86::BI__builtin_ia32_vec_ext_v4di:
3627 case X86::BI__builtin_ia32_extractf32x4_mask:
3628 case X86::BI__builtin_ia32_extracti32x4_mask:
3629 case X86::BI__builtin_ia32_extractf64x2_512_mask:
3630 case X86::BI__builtin_ia32_extracti64x2_512_mask:
3631 i = 1; l = 0; u = 3;
3632 break;
3633 case X86::BI_mm_prefetch:
3634 case X86::BI__builtin_ia32_vec_ext_v8hi:
3635 case X86::BI__builtin_ia32_vec_ext_v8si:
3636 i = 1; l = 0; u = 7;
3637 break;
3638 case X86::BI__builtin_ia32_sha1rnds4:
3639 case X86::BI__builtin_ia32_blendpd:
3640 case X86::BI__builtin_ia32_shufpd:
3641 case X86::BI__builtin_ia32_vec_set_v4hi:
3642 case X86::BI__builtin_ia32_vec_set_v4si:
3643 case X86::BI__builtin_ia32_vec_set_v4di:
3644 case X86::BI__builtin_ia32_shuf_f32x4_256:
3645 case X86::BI__builtin_ia32_shuf_f64x2_256:
3646 case X86::BI__builtin_ia32_shuf_i32x4_256:
3647 case X86::BI__builtin_ia32_shuf_i64x2_256:
3648 case X86::BI__builtin_ia32_insertf64x2_512:
3649 case X86::BI__builtin_ia32_inserti64x2_512:
3650 case X86::BI__builtin_ia32_insertf32x4:
3651 case X86::BI__builtin_ia32_inserti32x4:
3652 i = 2; l = 0; u = 3;
3653 break;
3654 case X86::BI__builtin_ia32_vpermil2pd:
3655 case X86::BI__builtin_ia32_vpermil2pd256:
3656 case X86::BI__builtin_ia32_vpermil2ps:
3657 case X86::BI__builtin_ia32_vpermil2ps256:
3658 i = 3; l = 0; u = 3;
3659 break;
3660 case X86::BI__builtin_ia32_cmpb128_mask:
3661 case X86::BI__builtin_ia32_cmpw128_mask:
3662 case X86::BI__builtin_ia32_cmpd128_mask:
3663 case X86::BI__builtin_ia32_cmpq128_mask:
3664 case X86::BI__builtin_ia32_cmpb256_mask:
3665 case X86::BI__builtin_ia32_cmpw256_mask:
3666 case X86::BI__builtin_ia32_cmpd256_mask:
3667 case X86::BI__builtin_ia32_cmpq256_mask:
3668 case X86::BI__builtin_ia32_cmpb512_mask:
3669 case X86::BI__builtin_ia32_cmpw512_mask:
3670 case X86::BI__builtin_ia32_cmpd512_mask:
3671 case X86::BI__builtin_ia32_cmpq512_mask:
3672 case X86::BI__builtin_ia32_ucmpb128_mask:
3673 case X86::BI__builtin_ia32_ucmpw128_mask:
3674 case X86::BI__builtin_ia32_ucmpd128_mask:
3675 case X86::BI__builtin_ia32_ucmpq128_mask:
3676 case X86::BI__builtin_ia32_ucmpb256_mask:
3677 case X86::BI__builtin_ia32_ucmpw256_mask:
3678 case X86::BI__builtin_ia32_ucmpd256_mask:
3679 case X86::BI__builtin_ia32_ucmpq256_mask:
3680 case X86::BI__builtin_ia32_ucmpb512_mask:
3681 case X86::BI__builtin_ia32_ucmpw512_mask:
3682 case X86::BI__builtin_ia32_ucmpd512_mask:
3683 case X86::BI__builtin_ia32_ucmpq512_mask:
3684 case X86::BI__builtin_ia32_vpcomub:
3685 case X86::BI__builtin_ia32_vpcomuw:
3686 case X86::BI__builtin_ia32_vpcomud:
3687 case X86::BI__builtin_ia32_vpcomuq:
3688 case X86::BI__builtin_ia32_vpcomb:
3689 case X86::BI__builtin_ia32_vpcomw:
3690 case X86::BI__builtin_ia32_vpcomd:
3691 case X86::BI__builtin_ia32_vpcomq:
3692 case X86::BI__builtin_ia32_vec_set_v8hi:
3693 case X86::BI__builtin_ia32_vec_set_v8si:
3694 i = 2; l = 0; u = 7;
3695 break;
3696 case X86::BI__builtin_ia32_vpermilpd256:
3697 case X86::BI__builtin_ia32_roundps:
3698 case X86::BI__builtin_ia32_roundpd:
3699 case X86::BI__builtin_ia32_roundps256:
3700 case X86::BI__builtin_ia32_roundpd256:
3701 case X86::BI__builtin_ia32_getmantpd128_mask:
3702 case X86::BI__builtin_ia32_getmantpd256_mask:
3703 case X86::BI__builtin_ia32_getmantps128_mask:
3704 case X86::BI__builtin_ia32_getmantps256_mask:
3705 case X86::BI__builtin_ia32_getmantpd512_mask:
3706 case X86::BI__builtin_ia32_getmantps512_mask:
3707 case X86::BI__builtin_ia32_vec_ext_v16qi:
3708 case X86::BI__builtin_ia32_vec_ext_v16hi:
3709 i = 1; l = 0; u = 15;
3710 break;
3711 case X86::BI__builtin_ia32_pblendd128:
3712 case X86::BI__builtin_ia32_blendps:
3713 case X86::BI__builtin_ia32_blendpd256:
3714 case X86::BI__builtin_ia32_shufpd256:
3715 case X86::BI__builtin_ia32_roundss:
3716 case X86::BI__builtin_ia32_roundsd:
3717 case X86::BI__builtin_ia32_rangepd128_mask:
3718 case X86::BI__builtin_ia32_rangepd256_mask:
3719 case X86::BI__builtin_ia32_rangepd512_mask:
3720 case X86::BI__builtin_ia32_rangeps128_mask:
3721 case X86::BI__builtin_ia32_rangeps256_mask:
3722 case X86::BI__builtin_ia32_rangeps512_mask:
3723 case X86::BI__builtin_ia32_getmantsd_round_mask:
3724 case X86::BI__builtin_ia32_getmantss_round_mask:
3725 case X86::BI__builtin_ia32_vec_set_v16qi:
3726 case X86::BI__builtin_ia32_vec_set_v16hi:
3727 i = 2; l = 0; u = 15;
3728 break;
3729 case X86::BI__builtin_ia32_vec_ext_v32qi:
3730 i = 1; l = 0; u = 31;
3731 break;
3732 case X86::BI__builtin_ia32_cmpps:
3733 case X86::BI__builtin_ia32_cmpss:
3734 case X86::BI__builtin_ia32_cmppd:
3735 case X86::BI__builtin_ia32_cmpsd:
3736 case X86::BI__builtin_ia32_cmpps256:
3737 case X86::BI__builtin_ia32_cmppd256:
3738 case X86::BI__builtin_ia32_cmpps128_mask:
3739 case X86::BI__builtin_ia32_cmppd128_mask:
3740 case X86::BI__builtin_ia32_cmpps256_mask:
3741 case X86::BI__builtin_ia32_cmppd256_mask:
3742 case X86::BI__builtin_ia32_cmpps512_mask:
3743 case X86::BI__builtin_ia32_cmppd512_mask:
3744 case X86::BI__builtin_ia32_cmpsd_mask:
3745 case X86::BI__builtin_ia32_cmpss_mask:
3746 case X86::BI__builtin_ia32_vec_set_v32qi:
3747 i = 2; l = 0; u = 31;
3748 break;
3749 case X86::BI__builtin_ia32_permdf256:
3750 case X86::BI__builtin_ia32_permdi256:
3751 case X86::BI__builtin_ia32_permdf512:
3752 case X86::BI__builtin_ia32_permdi512:
3753 case X86::BI__builtin_ia32_vpermilps:
3754 case X86::BI__builtin_ia32_vpermilps256:
3755 case X86::BI__builtin_ia32_vpermilpd512:
3756 case X86::BI__builtin_ia32_vpermilps512:
3757 case X86::BI__builtin_ia32_pshufd:
3758 case X86::BI__builtin_ia32_pshufd256:
3759 case X86::BI__builtin_ia32_pshufd512:
3760 case X86::BI__builtin_ia32_pshufhw:
3761 case X86::BI__builtin_ia32_pshufhw256:
3762 case X86::BI__builtin_ia32_pshufhw512:
3763 case X86::BI__builtin_ia32_pshuflw:
3764 case X86::BI__builtin_ia32_pshuflw256:
3765 case X86::BI__builtin_ia32_pshuflw512:
3766 case X86::BI__builtin_ia32_vcvtps2ph:
3767 case X86::BI__builtin_ia32_vcvtps2ph_mask:
3768 case X86::BI__builtin_ia32_vcvtps2ph256:
3769 case X86::BI__builtin_ia32_vcvtps2ph256_mask:
3770 case X86::BI__builtin_ia32_vcvtps2ph512_mask:
3771 case X86::BI__builtin_ia32_rndscaleps_128_mask:
3772 case X86::BI__builtin_ia32_rndscalepd_128_mask:
3773 case X86::BI__builtin_ia32_rndscaleps_256_mask:
3774 case X86::BI__builtin_ia32_rndscalepd_256_mask:
3775 case X86::BI__builtin_ia32_rndscaleps_mask:
3776 case X86::BI__builtin_ia32_rndscalepd_mask:
3777 case X86::BI__builtin_ia32_reducepd128_mask:
3778 case X86::BI__builtin_ia32_reducepd256_mask:
3779 case X86::BI__builtin_ia32_reducepd512_mask:
3780 case X86::BI__builtin_ia32_reduceps128_mask:
3781 case X86::BI__builtin_ia32_reduceps256_mask:
3782 case X86::BI__builtin_ia32_reduceps512_mask:
3783 case X86::BI__builtin_ia32_prold512:
3784 case X86::BI__builtin_ia32_prolq512:
3785 case X86::BI__builtin_ia32_prold128:
3786 case X86::BI__builtin_ia32_prold256:
3787 case X86::BI__builtin_ia32_prolq128:
3788 case X86::BI__builtin_ia32_prolq256:
3789 case X86::BI__builtin_ia32_prord512:
3790 case X86::BI__builtin_ia32_prorq512:
3791 case X86::BI__builtin_ia32_prord128:
3792 case X86::BI__builtin_ia32_prord256:
3793 case X86::BI__builtin_ia32_prorq128:
3794 case X86::BI__builtin_ia32_prorq256:
3795 case X86::BI__builtin_ia32_fpclasspd128_mask:
3796 case X86::BI__builtin_ia32_fpclasspd256_mask:
3797 case X86::BI__builtin_ia32_fpclassps128_mask:
3798 case X86::BI__builtin_ia32_fpclassps256_mask:
3799 case X86::BI__builtin_ia32_fpclassps512_mask:
3800 case X86::BI__builtin_ia32_fpclasspd512_mask:
3801 case X86::BI__builtin_ia32_fpclasssd_mask:
3802 case X86::BI__builtin_ia32_fpclassss_mask:
3803 case X86::BI__builtin_ia32_pslldqi128_byteshift:
3804 case X86::BI__builtin_ia32_pslldqi256_byteshift:
3805 case X86::BI__builtin_ia32_pslldqi512_byteshift:
3806 case X86::BI__builtin_ia32_psrldqi128_byteshift:
3807 case X86::BI__builtin_ia32_psrldqi256_byteshift:
3808 case X86::BI__builtin_ia32_psrldqi512_byteshift:
3809 case X86::BI__builtin_ia32_kshiftliqi:
3810 case X86::BI__builtin_ia32_kshiftlihi:
3811 case X86::BI__builtin_ia32_kshiftlisi:
3812 case X86::BI__builtin_ia32_kshiftlidi:
3813 case X86::BI__builtin_ia32_kshiftriqi:
3814 case X86::BI__builtin_ia32_kshiftrihi:
3815 case X86::BI__builtin_ia32_kshiftrisi:
3816 case X86::BI__builtin_ia32_kshiftridi:
3817 i = 1; l = 0; u = 255;
3818 break;
3819 case X86::BI__builtin_ia32_vperm2f128_pd256:
3820 case X86::BI__builtin_ia32_vperm2f128_ps256:
3821 case X86::BI__builtin_ia32_vperm2f128_si256:
3822 case X86::BI__builtin_ia32_permti256:
3823 case X86::BI__builtin_ia32_pblendw128:
3824 case X86::BI__builtin_ia32_pblendw256:
3825 case X86::BI__builtin_ia32_blendps256:
3826 case X86::BI__builtin_ia32_pblendd256:
3827 case X86::BI__builtin_ia32_palignr128:
3828 case X86::BI__builtin_ia32_palignr256:
3829 case X86::BI__builtin_ia32_palignr512:
3830 case X86::BI__builtin_ia32_alignq512:
3831 case X86::BI__builtin_ia32_alignd512:
3832 case X86::BI__builtin_ia32_alignd128:
3833 case X86::BI__builtin_ia32_alignd256:
3834 case X86::BI__builtin_ia32_alignq128:
3835 case X86::BI__builtin_ia32_alignq256:
3836 case X86::BI__builtin_ia32_vcomisd:
3837 case X86::BI__builtin_ia32_vcomiss:
3838 case X86::BI__builtin_ia32_shuf_f32x4:
3839 case X86::BI__builtin_ia32_shuf_f64x2:
3840 case X86::BI__builtin_ia32_shuf_i32x4:
3841 case X86::BI__builtin_ia32_shuf_i64x2:
3842 case X86::BI__builtin_ia32_shufpd512:
3843 case X86::BI__builtin_ia32_shufps:
3844 case X86::BI__builtin_ia32_shufps256:
3845 case X86::BI__builtin_ia32_shufps512:
3846 case X86::BI__builtin_ia32_dbpsadbw128:
3847 case X86::BI__builtin_ia32_dbpsadbw256:
3848 case X86::BI__builtin_ia32_dbpsadbw512:
3849 case X86::BI__builtin_ia32_vpshldd128:
3850 case X86::BI__builtin_ia32_vpshldd256:
3851 case X86::BI__builtin_ia32_vpshldd512:
3852 case X86::BI__builtin_ia32_vpshldq128:
3853 case X86::BI__builtin_ia32_vpshldq256:
3854 case X86::BI__builtin_ia32_vpshldq512:
3855 case X86::BI__builtin_ia32_vpshldw128:
3856 case X86::BI__builtin_ia32_vpshldw256:
3857 case X86::BI__builtin_ia32_vpshldw512:
3858 case X86::BI__builtin_ia32_vpshrdd128:
3859 case X86::BI__builtin_ia32_vpshrdd256:
3860 case X86::BI__builtin_ia32_vpshrdd512:
3861 case X86::BI__builtin_ia32_vpshrdq128:
3862 case X86::BI__builtin_ia32_vpshrdq256:
3863 case X86::BI__builtin_ia32_vpshrdq512:
3864 case X86::BI__builtin_ia32_vpshrdw128:
3865 case X86::BI__builtin_ia32_vpshrdw256:
3866 case X86::BI__builtin_ia32_vpshrdw512:
3867 i = 2; l = 0; u = 255;
3868 break;
3869 case X86::BI__builtin_ia32_fixupimmpd512_mask:
3870 case X86::BI__builtin_ia32_fixupimmpd512_maskz:
3871 case X86::BI__builtin_ia32_fixupimmps512_mask:
3872 case X86::BI__builtin_ia32_fixupimmps512_maskz:
3873 case X86::BI__builtin_ia32_fixupimmsd_mask:
3874 case X86::BI__builtin_ia32_fixupimmsd_maskz:
3875 case X86::BI__builtin_ia32_fixupimmss_mask:
3876 case X86::BI__builtin_ia32_fixupimmss_maskz:
3877 case X86::BI__builtin_ia32_fixupimmpd128_mask:
3878 case X86::BI__builtin_ia32_fixupimmpd128_maskz:
3879 case X86::BI__builtin_ia32_fixupimmpd256_mask:
3880 case X86::BI__builtin_ia32_fixupimmpd256_maskz:
3881 case X86::BI__builtin_ia32_fixupimmps128_mask:
3882 case X86::BI__builtin_ia32_fixupimmps128_maskz:
3883 case X86::BI__builtin_ia32_fixupimmps256_mask:
3884 case X86::BI__builtin_ia32_fixupimmps256_maskz:
3885 case X86::BI__builtin_ia32_pternlogd512_mask:
3886 case X86::BI__builtin_ia32_pternlogd512_maskz:
3887 case X86::BI__builtin_ia32_pternlogq512_mask:
3888 case X86::BI__builtin_ia32_pternlogq512_maskz:
3889 case X86::BI__builtin_ia32_pternlogd128_mask:
3890 case X86::BI__builtin_ia32_pternlogd128_maskz:
3891 case X86::BI__builtin_ia32_pternlogd256_mask:
3892 case X86::BI__builtin_ia32_pternlogd256_maskz:
3893 case X86::BI__builtin_ia32_pternlogq128_mask:
3894 case X86::BI__builtin_ia32_pternlogq128_maskz:
3895 case X86::BI__builtin_ia32_pternlogq256_mask:
3896 case X86::BI__builtin_ia32_pternlogq256_maskz:
3897 i = 3; l = 0; u = 255;
3898 break;
3899 case X86::BI__builtin_ia32_gatherpfdpd:
3900 case X86::BI__builtin_ia32_gatherpfdps:
3901 case X86::BI__builtin_ia32_gatherpfqpd:
3902 case X86::BI__builtin_ia32_gatherpfqps:
3903 case X86::BI__builtin_ia32_scatterpfdpd:
3904 case X86::BI__builtin_ia32_scatterpfdps:
3905 case X86::BI__builtin_ia32_scatterpfqpd:
3906 case X86::BI__builtin_ia32_scatterpfqps:
3907 i = 4; l = 2; u = 3;
3908 break;
3909 case X86::BI__builtin_ia32_rndscalesd_round_mask:
3910 case X86::BI__builtin_ia32_rndscaless_round_mask:
3911 i = 4; l = 0; u = 255;
3912 break;
3913 }
3914
3915 // Note that we don't force a hard error on the range check here, allowing
3916 // template-generated or macro-generated dead code to potentially have out-of-
3917 // range values. These need to code generate, but don't need to necessarily
3918 // make any sense. We use a warning that defaults to an error.
3919 return SemaBuiltinConstantArgRange(TheCall, i, l, u, /*RangeIsError*/ false);
3920 }
3921
3922 /// Given a FunctionDecl's FormatAttr, attempts to populate the FomatStringInfo
3923 /// parameter with the FormatAttr's correct format_idx and firstDataArg.
3924 /// Returns true when the format fits the function and the FormatStringInfo has
3925 /// been populated.
3926 bool Sema::getFormatStringInfo(const FormatAttr *Format, bool IsCXXMember,
3927 FormatStringInfo *FSI) {
3928 FSI->HasVAListArg = Format->getFirstArg() == 0;
3929 FSI->FormatIdx = Format->getFormatIdx() - 1;
3930 FSI->FirstDataArg = FSI->HasVAListArg ? 0 : Format->getFirstArg() - 1;
3931
3932 // The way the format attribute works in GCC, the implicit this argument
3933 // of member functions is counted. However, it doesn't appear in our own
3934 // lists, so decrement format_idx in that case.
3935 if (IsCXXMember) {
3936 if(FSI->FormatIdx == 0)
3937 return false;
3938 --FSI->FormatIdx;
3939 if (FSI->FirstDataArg != 0)
3940 --FSI->FirstDataArg;
3941 }
3942 return true;
3943 }
3944
3945 /// Checks if a the given expression evaluates to null.
3946 ///
3947 /// Returns true if the value evaluates to null.
3948 static bool CheckNonNullExpr(Sema &S, const Expr *Expr) {
3949 // If the expression has non-null type, it doesn't evaluate to null.
3950 if (auto nullability
3951 = Expr->IgnoreImplicit()->getType()->getNullability(S.Context)) {
3952 if (*nullability == NullabilityKind::NonNull)
3953 return false;
3954 }
3955
3956 // As a special case, transparent unions initialized with zero are
3957 // considered null for the purposes of the nonnull attribute.
3958 if (const RecordType *UT = Expr->getType()->getAsUnionType()) {
3959 if (UT->getDecl()->hasAttr<TransparentUnionAttr>())
3960 if (const CompoundLiteralExpr *CLE =
3961 dyn_cast<CompoundLiteralExpr>(Expr))
3962 if (const InitListExpr *ILE =
3963 dyn_cast<InitListExpr>(CLE->getInitializer()))
3964 Expr = ILE->getInit(0);
3965 }
3966
3967 bool Result;
3968 return (!Expr->isValueDependent() &&
3969 Expr->EvaluateAsBooleanCondition(Result, S.Context) &&
3970 !Result);
3971 }
3972
3973 static void CheckNonNullArgument(Sema &S,
3974 const Expr *ArgExpr,
3975 SourceLocation CallSiteLoc) {
3976 if (CheckNonNullExpr(S, ArgExpr))
3977 S.DiagRuntimeBehavior(CallSiteLoc, ArgExpr,
3978 S.PDiag(diag::warn_null_arg) << ArgExpr->getSourceRange());
3979 }
3980
3981 bool Sema::GetFormatNSStringIdx(const FormatAttr *Format, unsigned &Idx) {
3982 FormatStringInfo FSI;
3983 if ((GetFormatStringType(Format) == FST_NSString) &&
3984 getFormatStringInfo(Format, false, &FSI)) {
3985 Idx = FSI.FormatIdx;
3986 return true;
3987 }
3988 return false;
3989 }
3990
3991 /// Diagnose use of %s directive in an NSString which is being passed
3992 /// as formatting string to formatting method.
3993 static void
3994 DiagnoseCStringFormatDirectiveInCFAPI(Sema &S,
3995 const NamedDecl *FDecl,
3996 Expr **Args,
3997 unsigned NumArgs) {
3998 unsigned Idx = 0;
3999 bool Format = false;
4000 ObjCStringFormatFamily SFFamily = FDecl->getObjCFStringFormattingFamily();
4001 if (SFFamily == ObjCStringFormatFamily::SFF_CFString) {
4002 Idx = 2;
4003 Format = true;
4004 }
4005 else
4006 for (const auto *I : FDecl->specific_attrs<FormatAttr>()) {
4007 if (S.GetFormatNSStringIdx(I, Idx)) {
4008 Format = true;
4009 break;
4010 }
4011 }
4012 if (!Format || NumArgs <= Idx)
4013 return;
4014 const Expr *FormatExpr = Args[Idx];
4015 if (const CStyleCastExpr *CSCE = dyn_cast<CStyleCastExpr>(FormatExpr))
4016 FormatExpr = CSCE->getSubExpr();
4017 const StringLiteral *FormatString;
4018 if (const ObjCStringLiteral *OSL =
4019 dyn_cast<ObjCStringLiteral>(FormatExpr->IgnoreParenImpCasts()))
4020 FormatString = OSL->getString();
4021 else
4022 FormatString = dyn_cast<StringLiteral>(FormatExpr->IgnoreParenImpCasts());
4023 if (!FormatString)
4024 return;
4025 if (S.FormatStringHasSArg(FormatString)) {
4026 S.Diag(FormatExpr->getExprLoc(), diag::warn_objc_cdirective_format_string)
4027 << "%s" << 1 << 1;
4028 S.Diag(FDecl->getLocation(), diag::note_entity_declared_at)
4029 << FDecl->getDeclName();
4030 }
4031 }
4032
4033 /// Determine whether the given type has a non-null nullability annotation.
4034 static bool isNonNullType(ASTContext &ctx, QualType type) {
4035 if (auto nullability = type->getNullability(ctx))
4036 return *nullability == NullabilityKind::NonNull;
4037
4038 return false;
4039 }
4040
4041 static void CheckNonNullArguments(Sema &S,
4042 const NamedDecl *FDecl,
4043 const FunctionProtoType *Proto,
4044 ArrayRef<const Expr *> Args,
4045 SourceLocation CallSiteLoc) {
4046 assert((FDecl || Proto) && "Need a function declaration or prototype");
4047
4048 // Check the attributes attached to the method/function itself.
4049 llvm::SmallBitVector NonNullArgs;
4050 if (FDecl) {
4051 // Handle the nonnull attribute on the function/method declaration itself.
4052 for (const auto *NonNull : FDecl->specific_attrs<NonNullAttr>()) {
4053 if (!NonNull->args_size()) {
4054 // Easy case: all pointer arguments are nonnull.
4055 for (const auto *Arg : Args)
4056 if (S.isValidPointerAttrType(Arg->getType()))
4057 CheckNonNullArgument(S, Arg, CallSiteLoc);
4058 return;
4059 }
4060
4061 for (const ParamIdx &Idx : NonNull->args()) {
4062 unsigned IdxAST = Idx.getASTIndex();
4063 if (IdxAST >= Args.size())
4064 continue;
4065 if (NonNullArgs.empty())
4066 NonNullArgs.resize(Args.size());
4067 NonNullArgs.set(IdxAST);
4068 }
4069 }
4070 }
4071
4072 if (FDecl && (isa<FunctionDecl>(FDecl) || isa<ObjCMethodDecl>(FDecl))) {
4073 // Handle the nonnull attribute on the parameters of the
4074 // function/method.
4075 ArrayRef<ParmVarDecl*> parms;
4076 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(FDecl))
4077 parms = FD->parameters();
4078 else
4079 parms = cast<ObjCMethodDecl>(FDecl)->parameters();
4080
4081 unsigned ParamIndex = 0;
4082 for (ArrayRef<ParmVarDecl*>::iterator I = parms.begin(), E = parms.end();
4083 I != E; ++I, ++ParamIndex) {
4084 const ParmVarDecl *PVD = *I;
4085 if (PVD->hasAttr<NonNullAttr>() ||
4086 isNonNullType(S.Context, PVD->getType())) {
4087 if (NonNullArgs.empty())
4088 NonNullArgs.resize(Args.size());
4089
4090 NonNullArgs.set(ParamIndex);
4091 }
4092 }
4093 } else {
4094 // If we have a non-function, non-method declaration but no
4095 // function prototype, try to dig out the function prototype.
4096 if (!Proto) {
4097 if (const ValueDecl *VD = dyn_cast<ValueDecl>(FDecl)) {
4098 QualType type = VD->getType().getNonReferenceType();
4099 if (auto pointerType = type->getAs<PointerType>())
4100 type = pointerType->getPointeeType();
4101 else if (auto blockType = type->getAs<BlockPointerType>())
4102 type = blockType->getPointeeType();
4103 // FIXME: data member pointers?
4104
4105 // Dig out the function prototype, if there is one.
4106 Proto = type->getAs<FunctionProtoType>();
4107 }
4108 }
4109
4110 // Fill in non-null argument information from the nullability
4111 // information on the parameter types (if we have them).
4112 if (Proto) {
4113 unsigned Index = 0;
4114 for (auto paramType : Proto->getParamTypes()) {
4115 if (isNonNullType(S.Context, paramType)) {
4116 if (NonNullArgs.empty())
4117 NonNullArgs.resize(Args.size());
4118
4119 NonNullArgs.set(Index);
4120 }
4121
4122 ++Index;
4123 }
4124 }
4125 }
4126
4127 // Check for non-null arguments.
4128 for (unsigned ArgIndex = 0, ArgIndexEnd = NonNullArgs.size();
4129 ArgIndex != ArgIndexEnd; ++ArgIndex) {
4130 if (NonNullArgs[ArgIndex])
4131 CheckNonNullArgument(S, Args[ArgIndex], CallSiteLoc);
4132 }
4133 }
4134
4135 /// Handles the checks for format strings, non-POD arguments to vararg
4136 /// functions, NULL arguments passed to non-NULL parameters, and diagnose_if
4137 /// attributes.
4138 void Sema::checkCall(NamedDecl *FDecl, const FunctionProtoType *Proto,
4139 const Expr *ThisArg, ArrayRef<const Expr *> Args,
4140 bool IsMemberFunction, SourceLocation Loc,
4141 SourceRange Range, VariadicCallType CallType) {
4142 // FIXME: We should check as much as we can in the template definition.
4143 if (CurContext->isDependentContext())
4144 return;
4145
4146 // Printf and scanf checking.
4147 llvm::SmallBitVector CheckedVarArgs;
4148 if (FDecl) {
4149 for (const auto *I : FDecl->specific_attrs<FormatAttr>()) {
4150 // Only create vector if there are format attributes.
4151 CheckedVarArgs.resize(Args.size());
4152
4153 CheckFormatArguments(I, Args, IsMemberFunction, CallType, Loc, Range,
4154 CheckedVarArgs);
4155 }
4156 }
4157
4158 // Refuse POD arguments that weren't caught by the format string
4159 // checks above.
4160 auto *FD = dyn_cast_or_null<FunctionDecl>(FDecl);
4161 if (CallType != VariadicDoesNotApply &&
4162 (!FD || FD->getBuiltinID() != Builtin::BI__noop)) {
4163 unsigned NumParams = Proto ? Proto->getNumParams()
4164 : FDecl && isa<FunctionDecl>(FDecl)
4165 ? cast<FunctionDecl>(FDecl)->getNumParams()
4166 : FDecl && isa<ObjCMethodDecl>(FDecl)
4167 ? cast<ObjCMethodDecl>(FDecl)->param_size()
4168 : 0;
4169
4170 for (unsigned ArgIdx = NumParams; ArgIdx < Args.size(); ++ArgIdx) {
4171 // Args[ArgIdx] can be null in malformed code.
4172 if (const Expr *Arg = Args[ArgIdx]) {
4173 if (CheckedVarArgs.empty() || !CheckedVarArgs[ArgIdx])
4174 checkVariadicArgument(Arg, CallType);
4175 }
4176 }
4177 }
4178
4179 if (FDecl || Proto) {
4180 CheckNonNullArguments(*this, FDecl, Proto, Args, Loc);
4181
4182 // Type safety checking.
4183 if (FDecl) {
4184 for (const auto *I : FDecl->specific_attrs<ArgumentWithTypeTagAttr>())
4185 CheckArgumentWithTypeTag(I, Args, Loc);
4186 }
4187 }
4188
4189 if (FD)
4190 diagnoseArgDependentDiagnoseIfAttrs(FD, ThisArg, Args, Loc);
4191 }
4192
4193 /// CheckConstructorCall - Check a constructor call for correctness and safety
4194 /// properties not enforced by the C type system.
4195 void Sema::CheckConstructorCall(FunctionDecl *FDecl,
4196 ArrayRef<const Expr *> Args,
4197 const FunctionProtoType *Proto,
4198 SourceLocation Loc) {
4199 VariadicCallType CallType =
4200 Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply;
4201 checkCall(FDecl, Proto, /*ThisArg=*/nullptr, Args, /*IsMemberFunction=*/true,
4202 Loc, SourceRange(), CallType);
4203 }
4204
4205 /// CheckFunctionCall - Check a direct function call for various correctness
4206 /// and safety properties not strictly enforced by the C type system.
4207 bool Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
4208 const FunctionProtoType *Proto) {
4209 bool IsMemberOperatorCall = isa<CXXOperatorCallExpr>(TheCall) &&
4210 isa<CXXMethodDecl>(FDecl);
4211 bool IsMemberFunction = isa<CXXMemberCallExpr>(TheCall) ||
4212 IsMemberOperatorCall;
4213 VariadicCallType CallType = getVariadicCallType(FDecl, Proto,
4214 TheCall->getCallee());
4215 Expr** Args = TheCall->getArgs();
4216 unsigned NumArgs = TheCall->getNumArgs();
4217
4218 Expr *ImplicitThis = nullptr;
4219 if (IsMemberOperatorCall) {
4220 // If this is a call to a member operator, hide the first argument
4221 // from checkCall.
4222 // FIXME: Our choice of AST representation here is less than ideal.
4223 ImplicitThis = Args[0];
4224 ++Args;
4225 --NumArgs;
4226 } else if (IsMemberFunction)
4227 ImplicitThis =
4228 cast<CXXMemberCallExpr>(TheCall)->getImplicitObjectArgument();
4229
4230 checkCall(FDecl, Proto, ImplicitThis, llvm::makeArrayRef(Args, NumArgs),
4231 IsMemberFunction, TheCall->getRParenLoc(),
4232 TheCall->getCallee()->getSourceRange(), CallType);
4233
4234 IdentifierInfo *FnInfo = FDecl->getIdentifier();
4235 // None of the checks below are needed for functions that don't have
4236 // simple names (e.g., C++ conversion functions).
4237 if (!FnInfo)
4238 return false;
4239
4240 CheckAbsoluteValueFunction(TheCall, FDecl);
4241 CheckMaxUnsignedZero(TheCall, FDecl);
4242
4243 if (getLangOpts().ObjC)
4244 DiagnoseCStringFormatDirectiveInCFAPI(*this, FDecl, Args, NumArgs);
4245
4246 unsigned CMId = FDecl->getMemoryFunctionKind();
4247 if (CMId == 0)
4248 return false;
4249
4250 // Handle memory setting and copying functions.
4251 if (CMId == Builtin::BIstrlcpy || CMId == Builtin::BIstrlcat)
4252 CheckStrlcpycatArguments(TheCall, FnInfo);
4253 else if (CMId == Builtin::BIstrncat)
4254 CheckStrncatArguments(TheCall, FnInfo);
4255 else
4256 CheckMemaccessArguments(TheCall, CMId, FnInfo);
4257
4258 return false;
4259 }
4260
4261 bool Sema::CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation lbrac,
4262 ArrayRef<const Expr *> Args) {
4263 VariadicCallType CallType =
4264 Method->isVariadic() ? VariadicMethod : VariadicDoesNotApply;
4265
4266 checkCall(Method, nullptr, /*ThisArg=*/nullptr, Args,
4267 /*IsMemberFunction=*/false, lbrac, Method->getSourceRange(),
4268 CallType);
4269
4270 return false;
4271 }
4272
4273 bool Sema::CheckPointerCall(NamedDecl *NDecl, CallExpr *TheCall,
4274 const FunctionProtoType *Proto) {
4275 QualType Ty;
4276 if (const auto *V = dyn_cast<VarDecl>(NDecl))
4277 Ty = V->getType().getNonReferenceType();
4278 else if (const auto *F = dyn_cast<FieldDecl>(NDecl))
4279 Ty = F->getType().getNonReferenceType();
4280 else
4281 return false;
4282
4283 if (!Ty->isBlockPointerType() && !Ty->isFunctionPointerType() &&
4284 !Ty->isFunctionProtoType())
4285 return false;
4286
4287 VariadicCallType CallType;
4288 if (!Proto || !Proto->isVariadic()) {
4289 CallType = VariadicDoesNotApply;
4290 } else if (Ty->isBlockPointerType()) {
4291 CallType = VariadicBlock;
4292 } else { // Ty->isFunctionPointerType()
4293 CallType = VariadicFunction;
4294 }
4295
4296 checkCall(NDecl, Proto, /*ThisArg=*/nullptr,
4297 llvm::makeArrayRef(TheCall->getArgs(), TheCall->getNumArgs()),
4298 /*IsMemberFunction=*/false, TheCall->getRParenLoc(),
4299 TheCall->getCallee()->getSourceRange(), CallType);
4300
4301 return false;
4302 }
4303
4304 /// Checks function calls when a FunctionDecl or a NamedDecl is not available,
4305 /// such as function pointers returned from functions.
4306 bool Sema::CheckOtherCall(CallExpr *TheCall, const FunctionProtoType *Proto) {
4307 VariadicCallType CallType = getVariadicCallType(/*FDecl=*/nullptr, Proto,
4308 TheCall->getCallee());
4309 checkCall(/*FDecl=*/nullptr, Proto, /*ThisArg=*/nullptr,
4310 llvm::makeArrayRef(TheCall->getArgs(), TheCall->getNumArgs()),
4311 /*IsMemberFunction=*/false, TheCall->getRParenLoc(),
4312 TheCall->getCallee()->getSourceRange(), CallType);
4313
4314 return false;
4315 }
4316
4317 static bool isValidOrderingForOp(int64_t Ordering, AtomicExpr::AtomicOp Op) {
4318 if (!llvm::isValidAtomicOrderingCABI(Ordering))
4319 return false;
4320
4321 auto OrderingCABI = (llvm::AtomicOrderingCABI)Ordering;
4322 switch (Op) {
4323 case AtomicExpr::AO__c11_atomic_init:
4324 case AtomicExpr::AO__opencl_atomic_init:
4325 llvm_unreachable("There is no ordering argument for an init");
4326
4327 case AtomicExpr::AO__c11_atomic_load:
4328 case AtomicExpr::AO__opencl_atomic_load:
4329 case AtomicExpr::AO__atomic_load_n:
4330 case AtomicExpr::AO__atomic_load:
4331 return OrderingCABI != llvm::AtomicOrderingCABI::release &&
4332 OrderingCABI != llvm::AtomicOrderingCABI::acq_rel;
4333
4334 case AtomicExpr::AO__c11_atomic_store:
4335 case AtomicExpr::AO__opencl_atomic_store:
4336 case AtomicExpr::AO__atomic_store:
4337 case AtomicExpr::AO__atomic_store_n:
4338 return OrderingCABI != llvm::AtomicOrderingCABI::consume &&
4339 OrderingCABI != llvm::AtomicOrderingCABI::acquire &&
4340 OrderingCABI != llvm::AtomicOrderingCABI::acq_rel;
4341
4342 default:
4343 return true;
4344 }
4345 }
4346
4347 ExprResult Sema::SemaAtomicOpsOverloaded(ExprResult TheCallResult,
4348 AtomicExpr::AtomicOp Op) {
4349 CallExpr *TheCall = cast<CallExpr>(TheCallResult.get());
4350 DeclRefExpr *DRE =cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
4351
4352 // All the non-OpenCL operations take one of the following forms.
4353 // The OpenCL operations take the __c11 forms with one extra argument for
4354 // synchronization scope.
4355 enum {
4356 // C __c11_atomic_init(A *, C)
4357 Init,
4358
4359 // C __c11_atomic_load(A *, int)
4360 Load,
4361
4362 // void __atomic_load(A *, CP, int)
4363 LoadCopy,
4364
4365 // void __atomic_store(A *, CP, int)
4366 Copy,
4367
4368 // C __c11_atomic_add(A *, M, int)
4369 Arithmetic,
4370
4371 // C __atomic_exchange_n(A *, CP, int)
4372 Xchg,
4373
4374 // void __atomic_exchange(A *, C *, CP, int)
4375 GNUXchg,
4376
4377 // bool __c11_atomic_compare_exchange_strong(A *, C *, CP, int, int)
4378 C11CmpXchg,
4379
4380 // bool __atomic_compare_exchange(A *, C *, CP, bool, int, int)
4381 GNUCmpXchg
4382 } Form = Init;
4383
4384 const unsigned NumForm = GNUCmpXchg + 1;
4385 const unsigned NumArgs[] = { 2, 2, 3, 3, 3, 3, 4, 5, 6 };
4386 const unsigned NumVals[] = { 1, 0, 1, 1, 1, 1, 2, 2, 3 };
4387 // where:
4388 // C is an appropriate type,
4389 // A is volatile _Atomic(C) for __c11 builtins and is C for GNU builtins,
4390 // CP is C for __c11 builtins and GNU _n builtins and is C * otherwise,
4391 // M is C if C is an integer, and ptrdiff_t if C is a pointer, and
4392 // the int parameters are for orderings.
4393
4394 static_assert(sizeof(NumArgs)/sizeof(NumArgs[0]) == NumForm
4395 && sizeof(NumVals)/sizeof(NumVals[0]) == NumForm,
4396 "need to update code for modified forms");
4397 static_assert(AtomicExpr::AO__c11_atomic_init == 0 &&
4398 AtomicExpr::AO__c11_atomic_fetch_xor + 1 ==
4399 AtomicExpr::AO__atomic_load,
4400 "need to update code for modified C11 atomics");
4401 bool IsOpenCL = Op >= AtomicExpr::AO__opencl_atomic_init &&
4402 Op <= AtomicExpr::AO__opencl_atomic_fetch_max;
4403 bool IsC11 = (Op >= AtomicExpr::AO__c11_atomic_init &&
4404 Op <= AtomicExpr::AO__c11_atomic_fetch_xor) ||
4405 IsOpenCL;
4406 bool IsN = Op == AtomicExpr::AO__atomic_load_n ||
4407 Op == AtomicExpr::AO__atomic_store_n ||
4408 Op == AtomicExpr::AO__atomic_exchange_n ||
4409 Op == AtomicExpr::AO__atomic_compare_exchange_n;
4410 bool IsAddSub = false;
4411 bool IsMinMax = false;
4412
4413 switch (Op) {
4414 case AtomicExpr::AO__c11_atomic_init:
4415 case AtomicExpr::AO__opencl_atomic_init:
4416 Form = Init;
4417 break;
4418
4419 case AtomicExpr::AO__c11_atomic_load:
4420 case AtomicExpr::AO__opencl_atomic_load:
4421 case AtomicExpr::AO__atomic_load_n:
4422 Form = Load;
4423 break;
4424
4425 case AtomicExpr::AO__atomic_load:
4426 Form = LoadCopy;
4427 break;
4428
4429 case AtomicExpr::AO__c11_atomic_store:
4430 case AtomicExpr::AO__opencl_atomic_store:
4431 case AtomicExpr::AO__atomic_store:
4432 case AtomicExpr::AO__atomic_store_n:
4433 Form = Copy;
4434 break;
4435
4436 case AtomicExpr::AO__c11_atomic_fetch_add:
4437 case AtomicExpr::AO__c11_atomic_fetch_sub:
4438 case AtomicExpr::AO__opencl_atomic_fetch_add:
4439 case AtomicExpr::AO__opencl_atomic_fetch_sub:
4440 case AtomicExpr::AO__opencl_atomic_fetch_min:
4441 case AtomicExpr::AO__opencl_atomic_fetch_max:
4442 case AtomicExpr::AO__atomic_fetch_add:
4443 case AtomicExpr::AO__atomic_fetch_sub:
4444 case AtomicExpr::AO__atomic_add_fetch:
4445 case AtomicExpr::AO__atomic_sub_fetch:
4446 IsAddSub = true;
4447 LLVM_FALLTHROUGH;
4448 case AtomicExpr::AO__c11_atomic_fetch_and:
4449 case AtomicExpr::AO__c11_atomic_fetch_or:
4450 case AtomicExpr::AO__c11_atomic_fetch_xor:
4451 case AtomicExpr::AO__opencl_atomic_fetch_and:
4452 case AtomicExpr::AO__opencl_atomic_fetch_or:
4453 case AtomicExpr::AO__opencl_atomic_fetch_xor:
4454 case AtomicExpr::AO__atomic_fetch_and:
4455 case AtomicExpr::AO__atomic_fetch_or:
4456 case AtomicExpr::AO__atomic_fetch_xor:
4457 case AtomicExpr::AO__atomic_fetch_nand:
4458 case AtomicExpr::AO__atomic_and_fetch:
4459 case AtomicExpr::AO__atomic_or_fetch:
4460 case AtomicExpr::AO__atomic_xor_fetch:
4461 case AtomicExpr::AO__atomic_nand_fetch:
4462 Form = Arithmetic;
4463 break;
4464
4465 case AtomicExpr::AO__atomic_fetch_min:
4466 case AtomicExpr::AO__atomic_fetch_max:
4467 IsMinMax = true;
4468 Form = Arithmetic;
4469 break;
4470
4471 case AtomicExpr::AO__c11_atomic_exchange:
4472 case AtomicExpr::AO__opencl_atomic_exchange:
4473 case AtomicExpr::AO__atomic_exchange_n:
4474 Form = Xchg;
4475 break;
4476
4477 case AtomicExpr::AO__atomic_exchange:
4478 Form = GNUXchg;
4479 break;
4480
4481 case AtomicExpr::AO__c11_atomic_compare_exchange_strong:
4482 case AtomicExpr::AO__c11_atomic_compare_exchange_weak:
4483 case AtomicExpr::AO__opencl_atomic_compare_exchange_strong:
4484 case AtomicExpr::AO__opencl_atomic_compare_exchange_weak:
4485 Form = C11CmpXchg;
4486 break;
4487
4488 case AtomicExpr::AO__atomic_compare_exchange:
4489 case AtomicExpr::AO__atomic_compare_exchange_n:
4490 Form = GNUCmpXchg;
4491 break;
4492 }
4493
4494 unsigned AdjustedNumArgs = NumArgs[Form];
4495 if (IsOpenCL && Op != AtomicExpr::AO__opencl_atomic_init)
4496 ++AdjustedNumArgs;
4497 // Check we have the right number of arguments.
4498 if (TheCall->getNumArgs() < AdjustedNumArgs) {
4499 Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
4500 << 0 << AdjustedNumArgs << TheCall->getNumArgs()
4501 << TheCall->getCallee()->getSourceRange();
4502 return ExprError();
4503 } else if (TheCall->getNumArgs() > AdjustedNumArgs) {
4504 Diag(TheCall->getArg(AdjustedNumArgs)->getBeginLoc(),
4505 diag::err_typecheck_call_too_many_args)
4506 << 0 << AdjustedNumArgs << TheCall->getNumArgs()
4507 << TheCall->getCallee()->getSourceRange();
4508 return ExprError();
4509 }
4510
4511 // Inspect the first argument of the atomic operation.
4512 Expr *Ptr = TheCall->getArg(0);
4513 ExprResult ConvertedPtr = DefaultFunctionArrayLvalueConversion(Ptr);
4514 if (ConvertedPtr.isInvalid())
4515 return ExprError();
4516
4517 Ptr = ConvertedPtr.get();
4518 const PointerType *pointerType = Ptr->getType()->getAs<PointerType>();
4519 if (!pointerType) {
4520 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer)
4521 << Ptr->getType() << Ptr->getSourceRange();
4522 return ExprError();
4523 }
4524
4525 // For a __c11 builtin, this should be a pointer to an _Atomic type.
4526 QualType AtomTy = pointerType->getPointeeType(); // 'A'
4527 QualType ValType = AtomTy; // 'C'
4528 if (IsC11) {
4529 if (!AtomTy->isAtomicType()) {
4530 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_atomic)
4531 << Ptr->getType() << Ptr->getSourceRange();
4532 return ExprError();
4533 }
4534 if ((Form != Load && Form != LoadCopy && AtomTy.isConstQualified()) ||
4535 AtomTy.getAddressSpace() == LangAS::opencl_constant) {
4536 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_non_const_atomic)
4537 << (AtomTy.isConstQualified() ? 0 : 1) << Ptr->getType()
4538 << Ptr->getSourceRange();
4539 return ExprError();
4540 }
4541 ValType = AtomTy->getAs<AtomicType>()->getValueType();
4542 } else if (Form != Load && Form != LoadCopy) {
4543 if (ValType.isConstQualified()) {
4544 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_non_const_pointer)
4545 << Ptr->getType() << Ptr->getSourceRange();
4546 return ExprError();
4547 }
4548 }
4549
4550 // For an arithmetic operation, the implied arithmetic must be well-formed.
4551 if (Form == Arithmetic) {
4552 // gcc does not enforce these rules for GNU atomics, but we do so for sanity.
4553 if (IsAddSub && !ValType->isIntegerType()
4554 && !ValType->isPointerType()) {
4555 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_atomic_int_or_ptr)
4556 << IsC11 << Ptr->getType() << Ptr->getSourceRange();
4557 return ExprError();
4558 }
4559 if (IsMinMax) {
4560 const BuiltinType *BT = ValType->getAs<BuiltinType>();
4561 if (!BT || (BT->getKind() != BuiltinType::Int &&
4562 BT->getKind() != BuiltinType::UInt)) {
4563 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_int32_or_ptr);
4564 return ExprError();
4565 }
4566 }
4567 if (!IsAddSub && !IsMinMax && !ValType->isIntegerType()) {
4568 Diag(DRE->getBeginLoc(), diag::err_atomic_op_bitwise_needs_atomic_int)
4569 << IsC11 << Ptr->getType() << Ptr->getSourceRange();
4570 return ExprError();
4571 }
4572 if (IsC11 && ValType->isPointerType() &&
4573 RequireCompleteType(Ptr->getBeginLoc(), ValType->getPointeeType(),
4574 diag::err_incomplete_type)) {
4575 return ExprError();
4576 }
4577 } else if (IsN && !ValType->isIntegerType() && !ValType->isPointerType()) {
4578 // For __atomic_*_n operations, the value type must be a scalar integral or
4579 // pointer type which is 1, 2, 4, 8 or 16 bytes in length.
4580 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_atomic_int_or_ptr)
4581 << IsC11 << Ptr->getType() << Ptr->getSourceRange();
4582 return ExprError();
4583 }
4584
4585 if (!IsC11 && !AtomTy.isTriviallyCopyableType(Context) &&
4586 !AtomTy->isScalarType()) {
4587 // For GNU atomics, require a trivially-copyable type. This is not part of
4588 // the GNU atomics specification, but we enforce it for sanity.
4589 Diag(DRE->getBeginLoc(), diag::err_atomic_op_needs_trivial_copy)
4590 << Ptr->getType() << Ptr->getSourceRange();
4591 return ExprError();
4592 }
4593
4594 switch (ValType.getObjCLifetime()) {
4595 case Qualifiers::OCL_None:
4596 case Qualifiers::OCL_ExplicitNone:
4597 // okay
4598 break;
4599
4600 case Qualifiers::OCL_Weak:
4601 case Qualifiers::OCL_Strong:
4602 case Qualifiers::OCL_Autoreleasing:
4603 // FIXME: Can this happen? By this point, ValType should be known
4604 // to be trivially copyable.
4605 Diag(DRE->getBeginLoc(), diag::err_arc_atomic_ownership)
4606 << ValType << Ptr->getSourceRange();
4607 return ExprError();
4608 }
4609
4610 // All atomic operations have an overload which takes a pointer to a volatile
4611 // 'A'. We shouldn't let the volatile-ness of the pointee-type inject itself
4612 // into the result or the other operands. Similarly atomic_load takes a
4613 // pointer to a const 'A'.
4614 ValType.removeLocalVolatile();
4615 ValType.removeLocalConst();
4616 QualType ResultType = ValType;
4617 if (Form == Copy || Form == LoadCopy || Form == GNUXchg ||
4618 Form == Init)
4619 ResultType = Context.VoidTy;
4620 else if (Form == C11CmpXchg || Form == GNUCmpXchg)
4621 ResultType = Context.BoolTy;
4622
4623 // The type of a parameter passed 'by value'. In the GNU atomics, such
4624 // arguments are actually passed as pointers.
4625 QualType ByValType = ValType; // 'CP'
4626 bool IsPassedByAddress = false;
4627 if (!IsC11 && !IsN) {
4628 ByValType = Ptr->getType();
4629 IsPassedByAddress = true;
4630 }
4631
4632 // The first argument's non-CV pointer type is used to deduce the type of
4633 // subsequent arguments, except for:
4634 // - weak flag (always converted to bool)
4635 // - memory order (always converted to int)
4636 // - scope (always converted to int)
4637 for (unsigned i = 0; i != TheCall->getNumArgs(); ++i) {
4638 QualType Ty;
4639 if (i < NumVals[Form] + 1) {
4640 switch (i) {
4641 case 0:
4642 // The first argument is always a pointer. It has a fixed type.
4643 // It is always dereferenced, a nullptr is undefined.
4644 CheckNonNullArgument(*this, TheCall->getArg(i), DRE->getBeginLoc());
4645 // Nothing else to do: we already know all we want about this pointer.
4646 continue;
4647 case 1:
4648 // The second argument is the non-atomic operand. For arithmetic, this
4649 // is always passed by value, and for a compare_exchange it is always
4650 // passed by address. For the rest, GNU uses by-address and C11 uses
4651 // by-value.
4652 assert(Form != Load);
4653 if (Form == Init || (Form == Arithmetic && ValType->isIntegerType()))
4654 Ty = ValType;
4655 else if (Form == Copy || Form == Xchg) {
4656 if (IsPassedByAddress)
4657 // The value pointer is always dereferenced, a nullptr is undefined.
4658 CheckNonNullArgument(*this, TheCall->getArg(i), DRE->getBeginLoc());
4659 Ty = ByValType;
4660 } else if (Form == Arithmetic)
4661 Ty = Context.getPointerDiffType();
4662 else {
4663 Expr *ValArg = TheCall->getArg(i);
4664 // The value pointer is always dereferenced, a nullptr is undefined.
4665 CheckNonNullArgument(*this, ValArg, DRE->getBeginLoc());
4666 LangAS AS = LangAS::Default;
4667 // Keep address space of non-atomic pointer type.
4668 if (const PointerType *PtrTy =
4669 ValArg->getType()->getAs<PointerType>()) {
4670 AS = PtrTy->getPointeeType().getAddressSpace();
4671 }
4672 Ty = Context.getPointerType(
4673 Context.getAddrSpaceQualType(ValType.getUnqualifiedType(), AS));
4674 }
4675 break;
4676 case 2:
4677 // The third argument to compare_exchange / GNU exchange is the desired
4678 // value, either by-value (for the C11 and *_n variant) or as a pointer.
4679 if (IsPassedByAddress)
4680 CheckNonNullArgument(*this, TheCall->getArg(i), DRE->getBeginLoc());
4681 Ty = ByValType;
4682 break;
4683 case 3:
4684 // The fourth argument to GNU compare_exchange is a 'weak' flag.
4685 Ty = Context.BoolTy;
4686 break;
4687 }
4688 } else {
4689 // The order(s) and scope are always converted to int.
4690 Ty = Context.IntTy;
4691 }
4692
4693 InitializedEntity Entity =
4694 InitializedEntity::InitializeParameter(Context, Ty, false);
4695 ExprResult Arg = TheCall->getArg(i);
4696 Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
4697 if (Arg.isInvalid())
4698 return true;
4699 TheCall->setArg(i, Arg.get());
4700 }
4701
4702 // Permute the arguments into a 'consistent' order.
4703 SmallVector<Expr*, 5> SubExprs;
4704 SubExprs.push_back(Ptr);
4705 switch (Form) {
4706 case Init:
4707 // Note, AtomicExpr::getVal1() has a special case for this atomic.
4708 SubExprs.push_back(TheCall->getArg(1)); // Val1
4709 break;
4710 case Load:
4711 SubExprs.push_back(TheCall->getArg(1)); // Order
4712 break;
4713 case LoadCopy:
4714 case Copy:
4715 case Arithmetic:
4716 case Xchg:
4717 SubExprs.push_back(TheCall->getArg(2)); // Order
4718 SubExprs.push_back(TheCall->getArg(1)); // Val1
4719 break;
4720 case GNUXchg:
4721 // Note, AtomicExpr::getVal2() has a special case for this atomic.
4722 SubExprs.push_back(TheCall->getArg(3)); // Order
4723 SubExprs.push_back(TheCall->getArg(1)); // Val1
4724 SubExprs.push_back(TheCall->getArg(2)); // Val2
4725 break;
4726 case C11CmpXchg:
4727 SubExprs.push_back(TheCall->getArg(3)); // Order
4728 SubExprs.push_back(TheCall->getArg(1)); // Val1
4729 SubExprs.push_back(TheCall->getArg(4)); // OrderFail
4730 SubExprs.push_back(TheCall->getArg(2)); // Val2
4731 break;
4732 case GNUCmpXchg:
4733 SubExprs.push_back(TheCall->getArg(4)); // Order
4734 SubExprs.push_back(TheCall->getArg(1)); // Val1
4735 SubExprs.push_back(TheCall->getArg(5)); // OrderFail
4736 SubExprs.push_back(TheCall->getArg(2)); // Val2
4737 SubExprs.push_back(TheCall->getArg(3)); // Weak
4738 break;
4739 }
4740
4741 if (SubExprs.size() >= 2 && Form != Init) {
4742 llvm::APSInt Result(32);
4743 if (SubExprs[1]->isIntegerConstantExpr(Result, Context) &&
4744 !isValidOrderingForOp(Result.getSExtValue(), Op))
4745 Diag(SubExprs[1]->getBeginLoc(),
4746 diag::warn_atomic_op_has_invalid_memory_order)
4747 << SubExprs[1]->getSourceRange();
4748 }
4749
4750 if (auto ScopeModel = AtomicExpr::getScopeModel(Op)) {
4751 auto *Scope = TheCall->getArg(TheCall->getNumArgs() - 1);
4752 llvm::APSInt Result(32);
4753 if (Scope->isIntegerConstantExpr(Result, Context) &&
4754 !ScopeModel->isValid(Result.getZExtValue())) {
4755 Diag(Scope->getBeginLoc(), diag::err_atomic_op_has_invalid_synch_scope)
4756 << Scope->getSourceRange();
4757 }
4758 SubExprs.push_back(Scope);
4759 }
4760
4761 AtomicExpr *AE =
4762 new (Context) AtomicExpr(TheCall->getCallee()->getBeginLoc(), SubExprs,
4763 ResultType, Op, TheCall->getRParenLoc());
4764
4765 if ((Op == AtomicExpr::AO__c11_atomic_load ||
4766 Op == AtomicExpr::AO__c11_atomic_store ||
4767 Op == AtomicExpr::AO__opencl_atomic_load ||
4768 Op == AtomicExpr::AO__opencl_atomic_store ) &&
4769 Context.AtomicUsesUnsupportedLibcall(AE))
4770 Diag(AE->getBeginLoc(), diag::err_atomic_load_store_uses_lib)
4771 << ((Op == AtomicExpr::AO__c11_atomic_load ||
4772 Op == AtomicExpr::AO__opencl_atomic_load)
4773 ? 0
4774 : 1);
4775
4776 return AE;
4777 }
4778
4779 /// checkBuiltinArgument - Given a call to a builtin function, perform
4780 /// normal type-checking on the given argument, updating the call in
4781 /// place. This is useful when a builtin function requires custom
4782 /// type-checking for some of its arguments but not necessarily all of
4783 /// them.
4784 ///
4785 /// Returns true on error.
4786 static bool checkBuiltinArgument(Sema &S, CallExpr *E, unsigned ArgIndex) {
4787 FunctionDecl *Fn = E->getDirectCallee();
4788 assert(Fn && "builtin call without direct callee!");
4789
4790 ParmVarDecl *Param = Fn->getParamDecl(ArgIndex);
4791 InitializedEntity Entity =
4792 InitializedEntity::InitializeParameter(S.Context, Param);
4793
4794 ExprResult Arg = E->getArg(0);
4795 Arg = S.PerformCopyInitialization(Entity, SourceLocation(), Arg);
4796 if (Arg.isInvalid())
4797 return true;
4798
4799 E->setArg(ArgIndex, Arg.get());
4800 return false;
4801 }
4802
4803 /// We have a call to a function like __sync_fetch_and_add, which is an
4804 /// overloaded function based on the pointer type of its first argument.
4805 /// The main ActOnCallExpr routines have already promoted the types of
4806 /// arguments because all of these calls are prototyped as void(...).
4807 ///
4808 /// This function goes through and does final semantic checking for these
4809 /// builtins, as well as generating any warnings.
4810 ExprResult
4811 Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
4812 CallExpr *TheCall = static_cast<CallExpr *>(TheCallResult.get());
4813 Expr *Callee = TheCall->getCallee();
4814 DeclRefExpr *DRE = cast<DeclRefExpr>(Callee->IgnoreParenCasts());
4815 FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
4816
4817 // Ensure that we have at least one argument to do type inference from.
4818 if (TheCall->getNumArgs() < 1) {
4819 Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
4820 << 0 << 1 << TheCall->getNumArgs() << Callee->getSourceRange();
4821 return ExprError();
4822 }
4823
4824 // Inspect the first argument of the atomic builtin. This should always be
4825 // a pointer type, whose element is an integral scalar or pointer type.
4826 // Because it is a pointer type, we don't have to worry about any implicit
4827 // casts here.
4828 // FIXME: We don't allow floating point scalars as input.
4829 Expr *FirstArg = TheCall->getArg(0);
4830 ExprResult FirstArgResult = DefaultFunctionArrayLvalueConversion(FirstArg);
4831 if (FirstArgResult.isInvalid())
4832 return ExprError();
4833 FirstArg = FirstArgResult.get();
4834 TheCall->setArg(0, FirstArg);
4835
4836 const PointerType *pointerType = FirstArg->getType()->getAs<PointerType>();
4837 if (!pointerType) {
4838 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer)
4839 << FirstArg->getType() << FirstArg->getSourceRange();
4840 return ExprError();
4841 }
4842
4843 QualType ValType = pointerType->getPointeeType();
4844 if (!ValType->isIntegerType() && !ValType->isAnyPointerType() &&
4845 !ValType->isBlockPointerType()) {
4846 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer_intptr)
4847 << FirstArg->getType() << FirstArg->getSourceRange();
4848 return ExprError();
4849 }
4850
4851 if (ValType.isConstQualified()) {
4852 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_cannot_be_const)
4853 << FirstArg->getType() << FirstArg->getSourceRange();
4854 return ExprError();
4855 }
4856
4857 switch (ValType.getObjCLifetime()) {
4858 case Qualifiers::OCL_None:
4859 case Qualifiers::OCL_ExplicitNone:
4860 // okay
4861 break;
4862
4863 case Qualifiers::OCL_Weak:
4864 case Qualifiers::OCL_Strong:
4865 case Qualifiers::OCL_Autoreleasing:
4866 Diag(DRE->getBeginLoc(), diag::err_arc_atomic_ownership)
4867 << ValType << FirstArg->getSourceRange();
4868 return ExprError();
4869 }
4870
4871 // Strip any qualifiers off ValType.
4872 ValType = ValType.getUnqualifiedType();
4873
4874 // The majority of builtins return a value, but a few have special return
4875 // types, so allow them to override appropriately below.
4876 QualType ResultType = ValType;
4877
4878 // We need to figure out which concrete builtin this maps onto. For example,
4879 // __sync_fetch_and_add with a 2 byte object turns into
4880 // __sync_fetch_and_add_2.
4881 #define BUILTIN_ROW(x) \
4882 { Builtin::BI##x##_1, Builtin::BI##x##_2, Builtin::BI##x##_4, \
4883 Builtin::BI##x##_8, Builtin::BI##x##_16 }
4884
4885 static const unsigned BuiltinIndices[][5] = {
4886 BUILTIN_ROW(__sync_fetch_and_add),
4887 BUILTIN_ROW(__sync_fetch_and_sub),
4888 BUILTIN_ROW(__sync_fetch_and_or),
4889 BUILTIN_ROW(__sync_fetch_and_and),
4890 BUILTIN_ROW(__sync_fetch_and_xor),
4891 BUILTIN_ROW(__sync_fetch_and_nand),
4892
4893 BUILTIN_ROW(__sync_add_and_fetch),
4894 BUILTIN_ROW(__sync_sub_and_fetch),
4895 BUILTIN_ROW(__sync_and_and_fetch),
4896 BUILTIN_ROW(__sync_or_and_fetch),
4897 BUILTIN_ROW(__sync_xor_and_fetch),
4898 BUILTIN_ROW(__sync_nand_and_fetch),
4899
4900 BUILTIN_ROW(__sync_val_compare_and_swap),
4901 BUILTIN_ROW(__sync_bool_compare_and_swap),
4902 BUILTIN_ROW(__sync_lock_test_and_set),
4903 BUILTIN_ROW(__sync_lock_release),
4904 BUILTIN_ROW(__sync_swap)
4905 };
4906 #undef BUILTIN_ROW
4907
4908 // Determine the index of the size.
4909 unsigned SizeIndex;
4910 switch (Context.getTypeSizeInChars(ValType).getQuantity()) {
4911 case 1: SizeIndex = 0; break;
4912 case 2: SizeIndex = 1; break;
4913 case 4: SizeIndex = 2; break;
4914 case 8: SizeIndex = 3; break;
4915 case 16: SizeIndex = 4; break;
4916 default:
4917 Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_pointer_size)
4918 << FirstArg->getType() << FirstArg->getSourceRange();
4919 return ExprError();
4920 }
4921
4922 // Each of these builtins has one pointer argument, followed by some number of
4923 // values (0, 1 or 2) followed by a potentially empty varags list of stuff
4924 // that we ignore. Find out which row of BuiltinIndices to read from as well
4925 // as the number of fixed args.
4926 unsigned BuiltinID = FDecl->getBuiltinID();
4927 unsigned BuiltinIndex, NumFixed = 1;
4928 bool WarnAboutSemanticsChange = false;
4929 switch (BuiltinID) {
4930 default: llvm_unreachable("Unknown overloaded atomic builtin!");
4931 case Builtin::BI__sync_fetch_and_add:
4932 case Builtin::BI__sync_fetch_and_add_1:
4933 case Builtin::BI__sync_fetch_and_add_2:
4934 case Builtin::BI__sync_fetch_and_add_4:
4935 case Builtin::BI__sync_fetch_and_add_8:
4936 case Builtin::BI__sync_fetch_and_add_16:
4937 BuiltinIndex = 0;
4938 break;
4939
4940 case Builtin::BI__sync_fetch_and_sub:
4941 case Builtin::BI__sync_fetch_and_sub_1:
4942 case Builtin::BI__sync_fetch_and_sub_2:
4943 case Builtin::BI__sync_fetch_and_sub_4:
4944 case Builtin::BI__sync_fetch_and_sub_8:
4945 case Builtin::BI__sync_fetch_and_sub_16:
4946 BuiltinIndex = 1;
4947 break;
4948
4949 case Builtin::BI__sync_fetch_and_or:
4950 case Builtin::BI__sync_fetch_and_or_1:
4951 case Builtin::BI__sync_fetch_and_or_2:
4952 case Builtin::BI__sync_fetch_and_or_4:
4953 case Builtin::BI__sync_fetch_and_or_8:
4954 case Builtin::BI__sync_fetch_and_or_16:
4955 BuiltinIndex = 2;
4956 break;
4957
4958 case Builtin::BI__sync_fetch_and_and:
4959 case Builtin::BI__sync_fetch_and_and_1:
4960 case Builtin::BI__sync_fetch_and_and_2:
4961 case Builtin::BI__sync_fetch_and_and_4:
4962 case Builtin::BI__sync_fetch_and_and_8:
4963 case Builtin::BI__sync_fetch_and_and_16:
4964 BuiltinIndex = 3;
4965 break;
4966
4967 case Builtin::BI__sync_fetch_and_xor:
4968 case Builtin::BI__sync_fetch_and_xor_1:
4969 case Builtin::BI__sync_fetch_and_xor_2:
4970 case Builtin::BI__sync_fetch_and_xor_4:
4971 case Builtin::BI__sync_fetch_and_xor_8:
4972 case Builtin::BI__sync_fetch_and_xor_16:
4973 BuiltinIndex = 4;
4974 break;
4975
4976 case Builtin::BI__sync_fetch_and_nand:
4977 case Builtin::BI__sync_fetch_and_nand_1:
4978 case Builtin::BI__sync_fetch_and_nand_2:
4979 case Builtin::BI__sync_fetch_and_nand_4:
4980 case Builtin::BI__sync_fetch_and_nand_8:
4981 case Builtin::BI__sync_fetch_and_nand_16:
4982 BuiltinIndex = 5;
4983 WarnAboutSemanticsChange = true;
4984 break;
4985
4986 case Builtin::BI__sync_add_and_fetch:
4987 case Builtin::BI__sync_add_and_fetch_1:
4988 case Builtin::BI__sync_add_and_fetch_2:
4989 case Builtin::BI__sync_add_and_fetch_4:
4990 case Builtin::BI__sync_add_and_fetch_8:
4991 case Builtin::BI__sync_add_and_fetch_16:
4992 BuiltinIndex = 6;
4993 break;
4994
4995 case Builtin::BI__sync_sub_and_fetch:
4996 case Builtin::BI__sync_sub_and_fetch_1:
4997 case Builtin::BI__sync_sub_and_fetch_2:
4998 case Builtin::BI__sync_sub_and_fetch_4:
4999 case Builtin::BI__sync_sub_and_fetch_8:
5000 case Builtin::BI__sync_sub_and_fetch_16:
5001 BuiltinIndex = 7;
5002 break;
5003
5004 case Builtin::BI__sync_and_and_fetch:
5005 case Builtin::BI__sync_and_and_fetch_1:
5006 case Builtin::BI__sync_and_and_fetch_2:
5007 case Builtin::BI__sync_and_and_fetch_4:
5008 case Builtin::BI__sync_and_and_fetch_8:
5009 case Builtin::BI__sync_and_and_fetch_16:
5010 BuiltinIndex = 8;
5011 break;
5012
5013 case Builtin::BI__sync_or_and_fetch:
5014 case Builtin::BI__sync_or_and_fetch_1:
5015 case Builtin::BI__sync_or_and_fetch_2:
5016 case Builtin::BI__sync_or_and_fetch_4:
5017 case Builtin::BI__sync_or_and_fetch_8:
5018 case Builtin::BI__sync_or_and_fetch_16:
5019 BuiltinIndex = 9;
5020 break;
5021
5022 case Builtin::BI__sync_xor_and_fetch:
5023 case Builtin::BI__sync_xor_and_fetch_1:
5024 case Builtin::BI__sync_xor_and_fetch_2:
5025 case Builtin::BI__sync_xor_and_fetch_4:
5026 case Builtin::BI__sync_xor_and_fetch_8:
5027 case Builtin::BI__sync_xor_and_fetch_16:
5028 BuiltinIndex = 10;
5029 break;
5030
5031 case Builtin::BI__sync_nand_and_fetch:
5032 case Builtin::BI__sync_nand_and_fetch_1:
5033 case Builtin::BI__sync_nand_and_fetch_2:
5034 case Builtin::BI__sync_nand_and_fetch_4:
5035 case Builtin::BI__sync_nand_and_fetch_8:
5036 case Builtin::BI__sync_nand_and_fetch_16:
5037 BuiltinIndex = 11;
5038 WarnAboutSemanticsChange = true;
5039 break;
5040
5041 case Builtin::BI__sync_val_compare_and_swap:
5042 case Builtin::BI__sync_val_compare_and_swap_1:
5043 case Builtin::BI__sync_val_compare_and_swap_2:
5044 case Builtin::BI__sync_val_compare_and_swap_4:
5045 case Builtin::BI__sync_val_compare_and_swap_8:
5046 case Builtin::BI__sync_val_compare_and_swap_16:
5047 BuiltinIndex = 12;
5048 NumFixed = 2;
5049 break;
5050
5051 case Builtin::BI__sync_bool_compare_and_swap:
5052 case Builtin::BI__sync_bool_compare_and_swap_1:
5053 case Builtin::BI__sync_bool_compare_and_swap_2:
5054 case Builtin::BI__sync_bool_compare_and_swap_4:
5055 case Builtin::BI__sync_bool_compare_and_swap_8:
5056 case Builtin::BI__sync_bool_compare_and_swap_16:
5057 BuiltinIndex = 13;
5058 NumFixed = 2;
5059 ResultType = Context.BoolTy;
5060 break;
5061
5062 case Builtin::BI__sync_lock_test_and_set:
5063 case Builtin::BI__sync_lock_test_and_set_1:
5064 case Builtin::BI__sync_lock_test_and_set_2:
5065 case Builtin::BI__sync_lock_test_and_set_4:
5066 case Builtin::BI__sync_lock_test_and_set_8:
5067 case Builtin::BI__sync_lock_test_and_set_16:
5068 BuiltinIndex = 14;
5069 break;
5070
5071 case Builtin::BI__sync_lock_release:
5072 case Builtin::BI__sync_lock_release_1:
5073 case Builtin::BI__sync_lock_release_2:
5074 case Builtin::BI__sync_lock_release_4:
5075 case Builtin::BI__sync_lock_release_8:
5076 case Builtin::BI__sync_lock_release_16:
5077 BuiltinIndex = 15;
5078 NumFixed = 0;
5079 ResultType = Context.VoidTy;
5080 break;
5081
5082 case Builtin::BI__sync_swap:
5083 case Builtin::BI__sync_swap_1:
5084 case Builtin::BI__sync_swap_2:
5085 case Builtin::BI__sync_swap_4:
5086 case Builtin::BI__sync_swap_8:
5087 case Builtin::BI__sync_swap_16:
5088 BuiltinIndex = 16;
5089 break;
5090 }
5091
5092 // Now that we know how many fixed arguments we expect, first check that we
5093 // have at least that many.
5094 if (TheCall->getNumArgs() < 1+NumFixed) {
5095 Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
5096 << 0 << 1 + NumFixed << TheCall->getNumArgs()
5097 << Callee->getSourceRange();
5098 return ExprError();
5099 }
5100
5101 Diag(TheCall->getEndLoc(), diag::warn_atomic_implicit_seq_cst)
5102 << Callee->getSourceRange();
5103
5104 if (WarnAboutSemanticsChange) {
5105 Diag(TheCall->getEndLoc(), diag::warn_sync_fetch_and_nand_semantics_change)
5106 << Callee->getSourceRange();
5107 }
5108
5109 // Get the decl for the concrete builtin from this, we can tell what the
5110 // concrete integer type we should convert to is.
5111 unsigned NewBuiltinID = BuiltinIndices[BuiltinIndex][SizeIndex];
5112 const char *NewBuiltinName = Context.BuiltinInfo.getName(NewBuiltinID);
5113 FunctionDecl *NewBuiltinDecl;
5114 if (NewBuiltinID == BuiltinID)
5115 NewBuiltinDecl = FDecl;
5116 else {
5117 // Perform builtin lookup to avoid redeclaring it.
5118 DeclarationName DN(&Context.Idents.get(NewBuiltinName));
5119 LookupResult Res(*this, DN, DRE->getBeginLoc(), LookupOrdinaryName);
5120 LookupName(Res, TUScope, /*AllowBuiltinCreation=*/true);
5121 assert(Res.getFoundDecl());
5122 NewBuiltinDecl = dyn_cast<FunctionDecl>(Res.getFoundDecl());
5123 if (!NewBuiltinDecl)
5124 return ExprError();
5125 }
5126
5127 // The first argument --- the pointer --- has a fixed type; we
5128 // deduce the types of the rest of the arguments accordingly. Walk
5129 // the remaining arguments, converting them to the deduced value type.
5130 for (unsigned i = 0; i != NumFixed; ++i) {
5131 ExprResult Arg = TheCall->getArg(i+1);
5132
5133 // GCC does an implicit conversion to the pointer or integer ValType. This
5134 // can fail in some cases (1i -> int**), check for this error case now.
5135 // Initialize the argument.
5136 InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
5137 ValType, /*consume*/ false);
5138 Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
5139 if (Arg.isInvalid())
5140 return ExprError();
5141
5142 // Okay, we have something that *can* be converted to the right type. Check
5143 // to see if there is a potentially weird extension going on here. This can
5144 // happen when you do an atomic operation on something like an char* and
5145 // pass in 42. The 42 gets converted to char. This is even more strange
5146 // for things like 45.123 -> char, etc.
5147 // FIXME: Do this check.
5148 TheCall->setArg(i+1, Arg.get());
5149 }
5150
5151 // Create a new DeclRefExpr to refer to the new decl.
5152 DeclRefExpr* NewDRE = DeclRefExpr::Create(
5153 Context,
5154 DRE->getQualifierLoc(),
5155 SourceLocation(),
5156 NewBuiltinDecl,
5157 /*enclosing*/ false,
5158 DRE->getLocation(),
5159 Context.BuiltinFnTy,
5160 DRE->getValueKind());
5161
5162 // Set the callee in the CallExpr.
5163 // FIXME: This loses syntactic information.
5164 QualType CalleePtrTy = Context.getPointerType(NewBuiltinDecl->getType());
5165 ExprResult PromotedCall = ImpCastExprToType(NewDRE, CalleePtrTy,
5166 CK_BuiltinFnToFnPtr);
5167 TheCall->setCallee(PromotedCall.get());
5168
5169 // Change the result type of the call to match the original value type. This
5170 // is arbitrary, but the codegen for these builtins ins design to handle it
5171 // gracefully.
5172 TheCall->setType(ResultType);
5173
5174 return TheCallResult;
5175 }
5176
5177 /// SemaBuiltinNontemporalOverloaded - We have a call to
5178 /// __builtin_nontemporal_store or __builtin_nontemporal_load, which is an
5179 /// overloaded function based on the pointer type of its last argument.
5180 ///
5181 /// This function goes through and does final semantic checking for these
5182 /// builtins.
5183 ExprResult Sema::SemaBuiltinNontemporalOverloaded(ExprResult TheCallResult) {
5184 CallExpr *TheCall = (CallExpr *)TheCallResult.get();
5185 DeclRefExpr *DRE =
5186 cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
5187 FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
5188 unsigned BuiltinID = FDecl->getBuiltinID();
5189 assert((BuiltinID == Builtin::BI__builtin_nontemporal_store ||
5190 BuiltinID == Builtin::BI__builtin_nontemporal_load) &&
5191 "Unexpected nontemporal load/store builtin!");
5192 bool isStore = BuiltinID == Builtin::BI__builtin_nontemporal_store;
5193 unsigned numArgs = isStore ? 2 : 1;
5194
5195 // Ensure that we have the proper number of arguments.
5196 if (checkArgCount(*this, TheCall, numArgs))
5197 return ExprError();
5198
5199 // Inspect the last argument of the nontemporal builtin. This should always
5200 // be a pointer type, from which we imply the type of the memory access.
5201 // Because it is a pointer type, we don't have to worry about any implicit
5202 // casts here.
5203 Expr *PointerArg = TheCall->getArg(numArgs - 1);
5204 ExprResult PointerArgResult =
5205 DefaultFunctionArrayLvalueConversion(PointerArg);
5206
5207 if (PointerArgResult.isInvalid())
5208 return ExprError();
5209 PointerArg = PointerArgResult.get();
5210 TheCall->setArg(numArgs - 1, PointerArg);
5211
5212 const PointerType *pointerType = PointerArg->getType()->getAs<PointerType>();
5213 if (!pointerType) {
5214 Diag(DRE->getBeginLoc(), diag::err_nontemporal_builtin_must_be_pointer)
5215 << PointerArg->getType() << PointerArg->getSourceRange();
5216 return ExprError();
5217 }
5218
5219 QualType ValType = pointerType->getPointeeType();
5220
5221 // Strip any qualifiers off ValType.
5222 ValType = ValType.getUnqualifiedType();
5223 if (!ValType->isIntegerType() && !ValType->isAnyPointerType() &&
5224 !ValType->isBlockPointerType() && !ValType->isFloatingType() &&
5225 !ValType->isVectorType()) {
5226 Diag(DRE->getBeginLoc(),
5227 diag::err_nontemporal_builtin_must_be_pointer_intfltptr_or_vector)
5228 << PointerArg->getType() << PointerArg->getSourceRange();
5229 return ExprError();
5230 }
5231
5232 if (!isStore) {
5233 TheCall->setType(ValType);
5234 return TheCallResult;
5235 }
5236
5237 ExprResult ValArg = TheCall->getArg(0);
5238 InitializedEntity Entity = InitializedEntity::InitializeParameter(
5239 Context, ValType, /*consume*/ false);
5240 ValArg = PerformCopyInitialization(Entity, SourceLocation(), ValArg);
5241 if (ValArg.isInvalid())
5242 return ExprError();
5243
5244 TheCall->setArg(0, ValArg.get());
5245 TheCall->setType(Context.VoidTy);
5246 return TheCallResult;
5247 }
5248
5249 /// CheckObjCString - Checks that the argument to the builtin
5250 /// CFString constructor is correct
5251 /// Note: It might also make sense to do the UTF-16 conversion here (would
5252 /// simplify the backend).
5253 bool Sema::CheckObjCString(Expr *Arg) {
5254 Arg = Arg->IgnoreParenCasts();
5255 StringLiteral *Literal = dyn_cast<StringLiteral>(Arg);
5256
5257 if (!Literal || !Literal->isAscii()) {
5258 Diag(Arg->getBeginLoc(), diag::err_cfstring_literal_not_string_constant)
5259 << Arg->getSourceRange();
5260 return true;
5261 }
5262
5263 if (Literal->containsNonAsciiOrNull()) {
5264 StringRef String = Literal->getString();
5265 unsigned NumBytes = String.size();
5266 SmallVector<llvm::UTF16, 128> ToBuf(NumBytes);
5267 const llvm::UTF8 *FromPtr = (const llvm::UTF8 *)String.data();
5268 llvm::UTF16 *ToPtr = &ToBuf[0];
5269
5270 llvm::ConversionResult Result =
5271 llvm::ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, &ToPtr,
5272 ToPtr + NumBytes, llvm::strictConversion);
5273 // Check for conversion failure.
5274 if (Result != llvm::conversionOK)
5275 Diag(Arg->getBeginLoc(), diag::warn_cfstring_truncated)
5276 << Arg->getSourceRange();
5277 }
5278 return false;
5279 }
5280
5281 /// CheckObjCString - Checks that the format string argument to the os_log()
5282 /// and os_trace() functions is correct, and converts it to const char *.
5283 ExprResult Sema::CheckOSLogFormatStringArg(Expr *Arg) {
5284 Arg = Arg->IgnoreParenCasts();
5285 auto *Literal = dyn_cast<StringLiteral>(Arg);
5286 if (!Literal) {
5287 if (auto *ObjcLiteral = dyn_cast<ObjCStringLiteral>(Arg)) {
5288 Literal = ObjcLiteral->getString();
5289 }
5290 }
5291
5292 if (!Literal || (!Literal->isAscii() && !Literal->isUTF8())) {
5293 return ExprError(
5294 Diag(Arg->getBeginLoc(), diag::err_os_log_format_not_string_constant)
5295 << Arg->getSourceRange());
5296 }
5297
5298 ExprResult Result(Literal);
5299 QualType ResultTy = Context.getPointerType(Context.CharTy.withConst());
5300 InitializedEntity Entity =
5301 InitializedEntity::InitializeParameter(Context, ResultTy, false);
5302 Result = PerformCopyInitialization(Entity, SourceLocation(), Result);
5303 return Result;
5304 }
5305
5306 /// Check that the user is calling the appropriate va_start builtin for the
5307 /// target and calling convention.
5308 static bool checkVAStartABI(Sema &S, unsigned BuiltinID, Expr *Fn) {
5309 const llvm::Triple &TT = S.Context.getTargetInfo().getTriple();
5310 bool IsX64 = TT.getArch() == llvm::Triple::x86_64;
5311 bool IsAArch64 = TT.getArch() == llvm::Triple::aarch64;
5312 bool IsWindows = TT.isOSWindows();
5313 bool IsMSVAStart = BuiltinID == Builtin::BI__builtin_ms_va_start;
5314 if (IsX64 || IsAArch64) {
5315 CallingConv CC = CC_C;
5316 if (const FunctionDecl *FD = S.getCurFunctionDecl())
5317 CC = FD->getType()->getAs<FunctionType>()->getCallConv();
5318 if (IsMSVAStart) {
5319 // Don't allow this in System V ABI functions.
5320 if (CC == CC_X86_64SysV || (!IsWindows && CC != CC_Win64))
5321 return S.Diag(Fn->getBeginLoc(),
5322 diag::err_ms_va_start_used_in_sysv_function);
5323 } else {
5324 // On x86-64/AArch64 Unix, don't allow this in Win64 ABI functions.
5325 // On x64 Windows, don't allow this in System V ABI functions.
5326 // (Yes, that means there's no corresponding way to support variadic
5327 // System V ABI functions on Windows.)
5328 if ((IsWindows && CC == CC_X86_64SysV) ||
5329 (!IsWindows && CC == CC_Win64))
5330 return S.Diag(Fn->getBeginLoc(),
5331 diag::err_va_start_used_in_wrong_abi_function)
5332 << !IsWindows;
5333 }
5334 return false;
5335 }
5336
5337 if (IsMSVAStart)
5338 return S.Diag(Fn->getBeginLoc(), diag::err_builtin_x64_aarch64_only);
5339 return false;
5340 }
5341
5342 static bool checkVAStartIsInVariadicFunction(Sema &S, Expr *Fn,
5343 ParmVarDecl **LastParam = nullptr) {
5344 // Determine whether the current function, block, or obj-c method is variadic
5345 // and get its parameter list.
5346 bool IsVariadic = false;
5347 ArrayRef<ParmVarDecl *> Params;
5348 DeclContext *Caller = S.CurContext;
5349 if (auto *Block = dyn_cast<BlockDecl>(Caller)) {
5350 IsVariadic = Block->isVariadic();
5351 Params = Block->parameters();
5352 } else if (auto *FD = dyn_cast<FunctionDecl>(Caller)) {
5353 IsVariadic = FD->isVariadic();
5354 Params = FD->parameters();
5355 } else if (auto *MD = dyn_cast<ObjCMethodDecl>(Caller)) {
5356 IsVariadic = MD->isVariadic();
5357 // FIXME: This isn't correct for methods (results in bogus warning).
5358 Params = MD->parameters();
5359 } else if (isa<CapturedDecl>(Caller)) {
5360 // We don't support va_start in a CapturedDecl.
5361 S.Diag(Fn->getBeginLoc(), diag::err_va_start_captured_stmt);
5362 return true;
5363 } else {
5364 // This must be some other declcontext that parses exprs.
5365 S.Diag(Fn->getBeginLoc(), diag::err_va_start_outside_function);
5366 return true;
5367 }
5368
5369 if (!IsVariadic) {
5370 S.Diag(Fn->getBeginLoc(), diag::err_va_start_fixed_function);
5371 return true;
5372 }
5373
5374 if (LastParam)
5375 *LastParam = Params.empty() ? nullptr : Params.back();
5376
5377 return false;
5378 }
5379
5380 /// Check the arguments to '__builtin_va_start' or '__builtin_ms_va_start'
5381 /// for validity. Emit an error and return true on failure; return false
5382 /// on success.
5383 bool Sema::SemaBuiltinVAStart(unsigned BuiltinID, CallExpr *TheCall) {
5384 Expr *Fn = TheCall->getCallee();
5385
5386 if (checkVAStartABI(*this, BuiltinID, Fn))
5387 return true;
5388
5389 if (TheCall->getNumArgs() > 2) {
5390 Diag(TheCall->getArg(2)->getBeginLoc(),
5391 diag::err_typecheck_call_too_many_args)
5392 << 0 /*function call*/ << 2 << TheCall->getNumArgs()
5393 << Fn->getSourceRange()
5394 << SourceRange(TheCall->getArg(2)->getBeginLoc(),
5395 (*(TheCall->arg_end() - 1))->getEndLoc());
5396 return true;
5397 }
5398
5399 if (TheCall->getNumArgs() < 2) {
5400 return Diag(TheCall->getEndLoc(),
5401 diag::err_typecheck_call_too_few_args_at_least)
5402 << 0 /*function call*/ << 2 << TheCall->getNumArgs();
5403 }
5404
5405 // Type-check the first argument normally.
5406 if (checkBuiltinArgument(*this, TheCall, 0))
5407 return true;
5408
5409 // Check that the current function is variadic, and get its last parameter.
5410 ParmVarDecl *LastParam;
5411 if (checkVAStartIsInVariadicFunction(*this, Fn, &LastParam))
5412 return true;
5413
5414 // Verify that the second argument to the builtin is the last argument of the
5415 // current function or method.
5416 bool SecondArgIsLastNamedArgument = false;
5417 const Expr *Arg = TheCall->getArg(1)->IgnoreParenCasts();
5418
5419 // These are valid if SecondArgIsLastNamedArgument is false after the next
5420 // block.
5421 QualType Type;
5422 SourceLocation ParamLoc;
5423 bool IsCRegister = false;
5424
5425 if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(Arg)) {
5426 if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(DR->getDecl())) {
5427 SecondArgIsLastNamedArgument = PV == LastParam;
5428
5429 Type = PV->getType();
5430 ParamLoc = PV->getLocation();
5431 IsCRegister =
5432 PV->getStorageClass() == SC_Register && !getLangOpts().CPlusPlus;
5433 }
5434 }
5435
5436 if (!SecondArgIsLastNamedArgument)
5437 Diag(TheCall->getArg(1)->getBeginLoc(),
5438 diag::warn_second_arg_of_va_start_not_last_named_param);
5439 else if (IsCRegister || Type->isReferenceType() ||
5440 Type->isSpecificBuiltinType(BuiltinType::Float) || [=] {
5441 // Promotable integers are UB, but enumerations need a bit of
5442 // extra checking to see what their promotable type actually is.
5443 if (!Type->isPromotableIntegerType())
5444 return false;
5445 if (!Type->isEnumeralType())
5446 return true;
5447 const EnumDecl *ED = Type->getAs<EnumType>()->getDecl();
5448 return !(ED &&
5449 Context.typesAreCompatible(ED->getPromotionType(), Type));
5450 }()) {
5451 unsigned Reason = 0;
5452 if (Type->isReferenceType()) Reason = 1;
5453 else if (IsCRegister) Reason = 2;
5454 Diag(Arg->getBeginLoc(), diag::warn_va_start_type_is_undefined) << Reason;
5455 Diag(ParamLoc, diag::note_parameter_type) << Type;
5456 }
5457
5458 TheCall->setType(Context.VoidTy);
5459 return false;
5460 }
5461
5462 bool Sema::SemaBuiltinVAStartARMMicrosoft(CallExpr *Call) {
5463 // void __va_start(va_list *ap, const char *named_addr, size_t slot_size,
5464 // const char *named_addr);
5465
5466 Expr *Func = Call->getCallee();
5467
5468 if (Call->getNumArgs() < 3)
5469 return Diag(Call->getEndLoc(),
5470 diag::err_typecheck_call_too_few_args_at_least)
5471 << 0 /*function call*/ << 3 << Call->getNumArgs();
5472
5473 // Type-check the first argument normally.
5474 if (checkBuiltinArgument(*this, Call, 0))
5475 return true;
5476
5477 // Check that the current function is variadic.
5478 if (checkVAStartIsInVariadicFunction(*this, Func))
5479 return true;
5480
5481 // __va_start on Windows does not validate the parameter qualifiers
5482
5483 const Expr *Arg1 = Call->getArg(1)->IgnoreParens();
5484 const Type *Arg1Ty = Arg1->getType().getCanonicalType().getTypePtr();
5485
5486 const Expr *Arg2 = Call->getArg(2)->IgnoreParens();
5487 const Type *Arg2Ty = Arg2->getType().getCanonicalType().getTypePtr();
5488
5489 const QualType &ConstCharPtrTy =
5490 Context.getPointerType(Context.CharTy.withConst());
5491 if (!Arg1Ty->isPointerType() ||
5492 Arg1Ty->getPointeeType().withoutLocalFastQualifiers() != Context.CharTy)
5493 Diag(Arg1->getBeginLoc(), diag::err_typecheck_convert_incompatible)
5494 << Arg1->getType() << ConstCharPtrTy << 1 /* different class */
5495 << 0 /* qualifier difference */
5496 << 3 /* parameter mismatch */
5497 << 2 << Arg1->getType() << ConstCharPtrTy;
5498
5499 const QualType SizeTy = Context.getSizeType();
5500 if (Arg2Ty->getCanonicalTypeInternal().withoutLocalFastQualifiers() != SizeTy)
5501 Diag(Arg2->getBeginLoc(), diag::err_typecheck_convert_incompatible)
5502 << Arg2->getType() << SizeTy << 1 /* different class */
5503 << 0 /* qualifier difference */
5504 << 3 /* parameter mismatch */
5505 << 3 << Arg2->getType() << SizeTy;
5506
5507 return false;
5508 }
5509
5510 /// SemaBuiltinUnorderedCompare - Handle functions like __builtin_isgreater and
5511 /// friends. This is declared to take (...), so we have to check everything.
5512 bool Sema::SemaBuiltinUnorderedCompare(CallExpr *TheCall) {
5513 if (TheCall->getNumArgs() < 2)
5514 return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
5515 << 0 << 2 << TheCall->getNumArgs() /*function call*/;
5516 if (TheCall->getNumArgs() > 2)
5517 return Diag(TheCall->getArg(2)->getBeginLoc(),
5518 diag::err_typecheck_call_too_many_args)
5519 << 0 /*function call*/ << 2 << TheCall->getNumArgs()
5520 << SourceRange(TheCall->getArg(2)->getBeginLoc(),
5521 (*(TheCall->arg_end() - 1))->getEndLoc());
5522
5523 ExprResult OrigArg0 = TheCall->getArg(0);
5524 ExprResult OrigArg1 = TheCall->getArg(1);
5525
5526 // Do standard promotions between the two arguments, returning their common
5527 // type.
5528 QualType Res = UsualArithmeticConversions(OrigArg0, OrigArg1, false);
5529 if (OrigArg0.isInvalid() || OrigArg1.isInvalid())
5530 return true;
5531
5532 // Make sure any conversions are pushed back into the call; this is
5533 // type safe since unordered compare builtins are declared as "_Bool
5534 // foo(...)".
5535 TheCall->setArg(0, OrigArg0.get());
5536 TheCall->setArg(1, OrigArg1.get());
5537
5538 if (OrigArg0.get()->isTypeDependent() || OrigArg1.get()->isTypeDependent())
5539 return false;
5540
5541 // If the common type isn't a real floating type, then the arguments were
5542 // invalid for this operation.
5543 if (Res.isNull() || !Res->isRealFloatingType())
5544 return Diag(OrigArg0.get()->getBeginLoc(),
5545 diag::err_typecheck_call_invalid_ordered_compare)
5546 << OrigArg0.get()->getType() << OrigArg1.get()->getType()
5547 << SourceRange(OrigArg0.get()->getBeginLoc(),
5548 OrigArg1.get()->getEndLoc());
5549
5550 return false;
5551 }
5552
5553 /// SemaBuiltinSemaBuiltinFPClassification - Handle functions like
5554 /// __builtin_isnan and friends. This is declared to take (...), so we have
5555 /// to check everything. We expect the last argument to be a floating point
5556 /// value.
5557 bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
5558 if (TheCall->getNumArgs() < NumArgs)
5559 return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
5560 << 0 << NumArgs << TheCall->getNumArgs() /*function call*/;
5561 if (TheCall->getNumArgs() > NumArgs)
5562 return Diag(TheCall->getArg(NumArgs)->getBeginLoc(),
5563 diag::err_typecheck_call_too_many_args)
5564 << 0 /*function call*/ << NumArgs << TheCall->getNumArgs()
5565 << SourceRange(TheCall->getArg(NumArgs)->getBeginLoc(),
5566 (*(TheCall->arg_end() - 1))->getEndLoc());
5567
5568 Expr *OrigArg = TheCall->getArg(NumArgs-1);
5569
5570 if (OrigArg->isTypeDependent())
5571 return false;
5572
5573 // This operation requires a non-_Complex floating-point number.
5574 if (!OrigArg->getType()->isRealFloatingType())
5575 return Diag(OrigArg->getBeginLoc(),
5576 diag::err_typecheck_call_invalid_unary_fp)
5577 << OrigArg->getType() << OrigArg->getSourceRange();
5578
5579 // If this is an implicit conversion from float -> float, double, or
5580 // long double, remove it.
5581 if (ImplicitCastExpr *Cast = dyn_cast<ImplicitCastExpr>(OrigArg)) {
5582 // Only remove standard FloatCasts, leaving other casts inplace
5583 if (Cast->getCastKind() == CK_FloatingCast) {
5584 Expr *CastArg = Cast->getSubExpr();
5585 if (CastArg->getType()->isSpecificBuiltinType(BuiltinType::Float)) {
5586 assert(
5587 (Cast->getType()->isSpecificBuiltinType(BuiltinType::Double) ||
5588 Cast->getType()->isSpecificBuiltinType(BuiltinType::Float) ||
5589 Cast->getType()->isSpecificBuiltinType(BuiltinType::LongDouble)) &&
5590 "promotion from float to either float, double, or long double is "
5591 "the only expected cast here");
5592 Cast->setSubExpr(nullptr);
5593 TheCall->setArg(NumArgs-1, CastArg);
5594 }
5595 }
5596 }
5597
5598 return false;
5599 }
5600
5601 // Customized Sema Checking for VSX builtins that have the following signature:
5602 // vector [...] builtinName(vector [...], vector [...], const int);
5603 // Which takes the same type of vectors (any legal vector type) for the first
5604 // two arguments and takes compile time constant for the third argument.
5605 // Example builtins are :
5606 // vector double vec_xxpermdi(vector double, vector double, int);
5607 // vector short vec_xxsldwi(vector short, vector short, int);
5608 bool Sema::SemaBuiltinVSX(CallExpr *TheCall) {
5609 unsigned ExpectedNumArgs = 3;
5610 if (TheCall->getNumArgs() < ExpectedNumArgs)
5611 return Diag(TheCall->getEndLoc(),
5612 diag::err_typecheck_call_too_few_args_at_least)
5613 << 0 /*function call*/ << ExpectedNumArgs << TheCall->getNumArgs()
5614 << TheCall->getSourceRange();
5615
5616 if (TheCall->getNumArgs() > ExpectedNumArgs)
5617 return Diag(TheCall->getEndLoc(),
5618 diag::err_typecheck_call_too_many_args_at_most)
5619 << 0 /*function call*/ << ExpectedNumArgs << TheCall->getNumArgs()
5620 << TheCall->getSourceRange();
5621
5622 // Check the third argument is a compile time constant
5623 llvm::APSInt Value;
5624 if(!TheCall->getArg(2)->isIntegerConstantExpr(Value, Context))
5625 return Diag(TheCall->getBeginLoc(),
5626 diag::err_vsx_builtin_nonconstant_argument)
5627 << 3 /* argument index */ << TheCall->getDirectCallee()
5628 << SourceRange(TheCall->getArg(2)->getBeginLoc(),
5629 TheCall->getArg(2)->getEndLoc());
5630
5631 QualType Arg1Ty = TheCall->getArg(0)->getType();
5632 QualType Arg2Ty = TheCall->getArg(1)->getType();
5633
5634 // Check the type of argument 1 and argument 2 are vectors.
5635 SourceLocation BuiltinLoc = TheCall->getBeginLoc();
5636 if ((!Arg1Ty->isVectorType() && !Arg1Ty->isDependentType()) ||
5637 (!Arg2Ty->isVectorType() && !Arg2Ty->isDependentType())) {
5638 return Diag(BuiltinLoc, diag::err_vec_builtin_non_vector)
5639 << TheCall->getDirectCallee()
5640 << SourceRange(TheCall->getArg(0)->getBeginLoc(),
5641 TheCall->getArg(1)->getEndLoc());
5642 }
5643
5644 // Check the first two arguments are the same type.
5645 if (!Context.hasSameUnqualifiedType(Arg1Ty, Arg2Ty)) {
5646 return Diag(BuiltinLoc, diag::err_vec_builtin_incompatible_vector)
5647 << TheCall->getDirectCallee()
5648 << SourceRange(TheCall->getArg(0)->getBeginLoc(),
5649 TheCall->getArg(1)->getEndLoc());
5650 }
5651
5652 // When default clang type checking is turned off and the customized type
5653 // checking is used, the returning type of the function must be explicitly
5654 // set. Otherwise it is _Bool by default.
5655 TheCall->setType(Arg1Ty);
5656
5657 return false;
5658 }
5659
5660 /// SemaBuiltinShuffleVector - Handle __builtin_shufflevector.
5661 // This is declared to take (...), so we have to check everything.
5662 ExprResult Sema::SemaBuiltinShuffleVector(CallExpr *TheCall) {
5663 if (TheCall->getNumArgs() < 2)
5664 return ExprError(Diag(TheCall->getEndLoc(),
5665 diag::err_typecheck_call_too_few_args_at_least)
5666 << 0 /*function call*/ << 2 << TheCall->getNumArgs()
5667 << TheCall->getSourceRange());
5668
5669 // Determine which of the following types of shufflevector we're checking:
5670 // 1) unary, vector mask: (lhs, mask)
5671 // 2) binary, scalar mask: (lhs, rhs, index, ..., index)
5672 QualType resType = TheCall->getArg(0)->getType();
5673 unsigned numElements = 0;
5674
5675 if (!TheCall->getArg(0)->isTypeDependent() &&
5676 !TheCall->getArg(1)->isTypeDependent()) {
5677 QualType LHSType = TheCall->getArg(0)->getType();
5678 QualType RHSType = TheCall->getArg(1)->getType();
5679
5680 if (!LHSType->isVectorType() || !RHSType->isVectorType())
5681 return ExprError(
5682 Diag(TheCall->getBeginLoc(), diag::err_vec_builtin_non_vector)
5683 << TheCall->getDirectCallee()
5684 << SourceRange(TheCall->getArg(0)->getBeginLoc(),
5685 TheCall->getArg(1)->getEndLoc()));
5686
5687 numElements = LHSType->getAs<VectorType>()->getNumElements();
5688 unsigned numResElements = TheCall->getNumArgs() - 2;
5689
5690 // Check to see if we have a call with 2 vector arguments, the unary shuffle
5691 // with mask. If so, verify that RHS is an integer vector type with the
5692 // same number of elts as lhs.
5693 if (TheCall->getNumArgs() == 2) {
5694 if (!RHSType->hasIntegerRepresentation() ||
5695 RHSType->getAs<VectorType>()->getNumElements() != numElements)
5696 return ExprError(Diag(TheCall->getBeginLoc(),
5697 diag::err_vec_builtin_incompatible_vector)
5698 << TheCall->getDirectCallee()
5699 << SourceRange(TheCall->getArg(1)->getBeginLoc(),
5700 TheCall->getArg(1)->getEndLoc()));
5701 } else if (!Context.hasSameUnqualifiedType(LHSType, RHSType)) {
5702 return ExprError(Diag(TheCall->getBeginLoc(),
5703 diag::err_vec_builtin_incompatible_vector)
5704 << TheCall->getDirectCallee()
5705 << SourceRange(TheCall->getArg(0)->getBeginLoc(),
5706 TheCall->getArg(1)->getEndLoc()));
5707 } else if (numElements != numResElements) {
5708 QualType eltType = LHSType->getAs<VectorType>()->getElementType();
5709 resType = Context.getVectorType(eltType, numResElements,
5710 VectorType::GenericVector);
5711 }
5712 }
5713
5714 for (unsigned i = 2; i < TheCall->getNumArgs(); i++) {
5715 if (TheCall->getArg(i)->isTypeDependent() ||
5716 TheCall->getArg(i)->isValueDependent())
5717 continue;
5718
5719 llvm::APSInt Result(32);
5720 if (!TheCall->getArg(i)->isIntegerConstantExpr(Result, Context))
5721 return ExprError(Diag(TheCall->getBeginLoc(),
5722 diag::err_shufflevector_nonconstant_argument)
5723 << TheCall->getArg(i)->getSourceRange());
5724
5725 // Allow -1 which will be translated to undef in the IR.
5726 if (Result.isSigned() && Result.isAllOnesValue())
5727 continue;
5728
5729 if (Result.getActiveBits() > 64 || Result.getZExtValue() >= numElements*2)
5730 return ExprError(Diag(TheCall->getBeginLoc(),
5731 diag::err_shufflevector_argument_too_large)
5732 << TheCall->getArg(i)->getSourceRange());
5733 }
5734
5735 SmallVector<Expr*, 32> exprs;
5736
5737 for (unsigned i = 0, e = TheCall->getNumArgs(); i != e; i++) {
5738 exprs.push_back(TheCall->getArg(i));
5739 TheCall->setArg(i, nullptr);
5740 }
5741
5742 return new (Context) ShuffleVectorExpr(Context, exprs, resType,
5743 TheCall->getCallee()->getBeginLoc(),
5744 TheCall->getRParenLoc());
5745 }
5746
5747 /// SemaConvertVectorExpr - Handle __builtin_convertvector
5748 ExprResult Sema::SemaConvertVectorExpr(Expr *E, TypeSourceInfo *TInfo,
5749 SourceLocation BuiltinLoc,
5750 SourceLocation RParenLoc) {
5751 ExprValueKind VK = VK_RValue;
5752 ExprObjectKind OK = OK_Ordinary;
5753 QualType DstTy = TInfo->getType();
5754 QualType SrcTy = E->getType();
5755
5756 if (!SrcTy->isVectorType() && !SrcTy->isDependentType())
5757 return ExprError(Diag(BuiltinLoc,
5758 diag::err_convertvector_non_vector)
5759 << E->getSourceRange());
5760 if (!DstTy->isVectorType() && !DstTy->isDependentType())
5761 return ExprError(Diag(BuiltinLoc,
5762 diag::err_convertvector_non_vector_type));
5763
5764 if (!SrcTy->isDependentType() && !DstTy->isDependentType()) {
5765 unsigned SrcElts = SrcTy->getAs<VectorType>()->getNumElements();
5766 unsigned DstElts = DstTy->getAs<VectorType>()->getNumElements();
5767 if (SrcElts != DstElts)
5768 return ExprError(Diag(BuiltinLoc,
5769 diag::err_convertvector_incompatible_vector)
5770 << E->getSourceRange());
5771 }
5772
5773 return new (Context)
5774 ConvertVectorExpr(E, TInfo, DstTy, VK, OK, BuiltinLoc, RParenLoc);
5775 }
5776
5777 /// SemaBuiltinPrefetch - Handle __builtin_prefetch.
5778 // This is declared to take (const void*, ...) and can take two
5779 // optional constant int args.
5780 bool Sema::SemaBuiltinPrefetch(CallExpr *TheCall) {
5781 unsigned NumArgs = TheCall->getNumArgs();
5782
5783 if (NumArgs > 3)
5784 return Diag(TheCall->getEndLoc(),
5785 diag::err_typecheck_call_too_many_args_at_most)
5786 << 0 /*function call*/ << 3 << NumArgs << TheCall->getSourceRange();
5787
5788 // Argument 0 is checked for us and the remaining arguments must be
5789 // constant integers.
5790 for (unsigned i = 1; i != NumArgs; ++i)
5791 if (SemaBuiltinConstantArgRange(TheCall, i, 0, i == 1 ? 1 : 3))
5792 return true;
5793
5794 return false;
5795 }
5796
5797 /// SemaBuiltinAssume - Handle __assume (MS Extension).
5798 // __assume does not evaluate its arguments, and should warn if its argument
5799 // has side effects.
5800 bool Sema::SemaBuiltinAssume(CallExpr *TheCall) {
5801 Expr *Arg = TheCall->getArg(0);
5802 if (Arg->isInstantiationDependent()) return false;
5803
5804 if (Arg->HasSideEffects(Context))
5805 Diag(Arg->getBeginLoc(), diag::warn_assume_side_effects)
5806 << Arg->getSourceRange()
5807 << cast<FunctionDecl>(TheCall->getCalleeDecl())->getIdentifier();
5808
5809 return false;
5810 }
5811
5812 /// Handle __builtin_alloca_with_align. This is declared
5813 /// as (size_t, size_t) where the second size_t must be a power of 2 greater
5814 /// than 8.
5815 bool Sema::SemaBuiltinAllocaWithAlign(CallExpr *TheCall) {
5816 // The alignment must be a constant integer.
5817 Expr *Arg = TheCall->getArg(1);
5818
5819 // We can't check the value of a dependent argument.
5820 if (!Arg->isTypeDependent() && !Arg->isValueDependent()) {
5821 if (const auto *UE =
5822 dyn_cast<UnaryExprOrTypeTraitExpr>(Arg->IgnoreParenImpCasts()))
5823 if (UE->getKind() == UETT_AlignOf ||
5824 UE->getKind() == UETT_PreferredAlignOf)
5825 Diag(TheCall->getBeginLoc(), diag::warn_alloca_align_alignof)
5826 << Arg->getSourceRange();
5827
5828 llvm::APSInt Result = Arg->EvaluateKnownConstInt(Context);
5829
5830 if (!Result.isPowerOf2())
5831 return Diag(TheCall->getBeginLoc(), diag::err_alignment_not_power_of_two)
5832 << Arg->getSourceRange();
5833
5834 if (Result < Context.getCharWidth())
5835 return Diag(TheCall->getBeginLoc(), diag::err_alignment_too_small)
5836 << (unsigned)Context.getCharWidth() << Arg->getSourceRange();
5837
5838 if (Result > std::numeric_limits<int32_t>::max())
5839 return Diag(TheCall->getBeginLoc(), diag::err_alignment_too_big)
5840 << std::numeric_limits<int32_t>::max() << Arg->getSourceRange();
5841 }
5842
5843 return false;
5844 }
5845
5846 /// Handle __builtin_assume_aligned. This is declared
5847 /// as (const void*, size_t, ...) and can take one optional constant int arg.
5848 bool Sema::SemaBuiltinAssumeAligned(CallExpr *TheCall) {
5849 unsigned NumArgs = TheCall->getNumArgs();
5850
5851 if (NumArgs > 3)
5852 return Diag(TheCall->getEndLoc(),
5853 diag::err_typecheck_call_too_many_args_at_most)
5854 << 0 /*function call*/ << 3 << NumArgs << TheCall->getSourceRange();
5855
5856 // The alignment must be a constant integer.
5857 Expr *Arg = TheCall->getArg(1);
5858
5859 // We can't check the value of a dependent argument.
5860 if (!Arg->isTypeDependent() && !Arg->isValueDependent()) {
5861 llvm::APSInt Result;
5862 if (SemaBuiltinConstantArg(TheCall, 1, Result))
5863 return true;
5864
5865 if (!Result.isPowerOf2())
5866 return Diag(TheCall->getBeginLoc(), diag::err_alignment_not_power_of_two)
5867 << Arg->getSourceRange();
5868 }
5869
5870 if (NumArgs > 2) {
5871 ExprResult Arg(TheCall->getArg(2));
5872 InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
5873 Context.getSizeType(), false);
5874 Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
5875 if (Arg.isInvalid()) return true;
5876 TheCall->setArg(2, Arg.get());
5877 }
5878
5879 return false;
5880 }
5881
5882 bool Sema::SemaBuiltinOSLogFormat(CallExpr *TheCall) {
5883 unsigned BuiltinID =
5884 cast<FunctionDecl>(TheCall->getCalleeDecl())->getBuiltinID();
5885 bool IsSizeCall = BuiltinID == Builtin::BI__builtin_os_log_format_buffer_size;
5886
5887 unsigned NumArgs = TheCall->getNumArgs();
5888 unsigned NumRequiredArgs = IsSizeCall ? 1 : 2;
5889 if (NumArgs < NumRequiredArgs) {
5890 return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
5891 << 0 /* function call */ << NumRequiredArgs << NumArgs
5892 << TheCall->getSourceRange();
5893 }
5894 if (NumArgs >= NumRequiredArgs + 0x100) {
5895 return Diag(TheCall->getEndLoc(),
5896 diag::err_typecheck_call_too_many_args_at_most)
5897 << 0 /* function call */ << (NumRequiredArgs + 0xff) << NumArgs
5898 << TheCall->getSourceRange();
5899 }
5900 unsigned i = 0;
5901
5902 // For formatting call, check buffer arg.
5903 if (!IsSizeCall) {
5904 ExprResult Arg(TheCall->getArg(i));
5905 InitializedEntity Entity = InitializedEntity::InitializeParameter(
5906 Context, Context.VoidPtrTy, false);
5907 Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
5908 if (Arg.isInvalid())
5909 return true;
5910 TheCall->setArg(i, Arg.get());
5911 i++;
5912 }
5913
5914 // Check string literal arg.
5915 unsigned FormatIdx = i;
5916 {
5917 ExprResult Arg = CheckOSLogFormatStringArg(TheCall->getArg(i));
5918 if (Arg.isInvalid())
5919 return true;
5920 TheCall->setArg(i, Arg.get());
5921 i++;
5922 }
5923
5924 // Make sure variadic args are scalar.
5925 unsigned FirstDataArg = i;
5926 while (i < NumArgs) {
5927 ExprResult Arg = DefaultVariadicArgumentPromotion(
5928 TheCall->getArg(i), VariadicFunction, nullptr);
5929 if (Arg.isInvalid())
5930 return true;
5931 CharUnits ArgSize = Context.getTypeSizeInChars(Arg.get()->getType());
5932 if (ArgSize.getQuantity() >= 0x100) {
5933 return Diag(Arg.get()->getEndLoc(), diag::err_os_log_argument_too_big)
5934 << i << (int)ArgSize.getQuantity() << 0xff
5935 << TheCall->getSourceRange();
5936 }
5937 TheCall->setArg(i, Arg.get());
5938 i++;
5939 }
5940
5941 // Check formatting specifiers. NOTE: We're only doing this for the non-size
5942 // call to avoid duplicate diagnostics.
5943 if (!IsSizeCall) {
5944 llvm::SmallBitVector CheckedVarArgs(NumArgs, false);
5945 ArrayRef<const Expr *> Args(TheCall->getArgs(), TheCall->getNumArgs());
5946 bool Success = CheckFormatArguments(
5947 Args, /*HasVAListArg*/ false, FormatIdx, FirstDataArg, FST_OSLog,
5948 VariadicFunction, TheCall->getBeginLoc(), SourceRange(),
5949 CheckedVarArgs);
5950 if (!Success)
5951 return true;
5952 }
5953
5954 if (IsSizeCall) {
5955 TheCall->setType(Context.getSizeType());
5956 } else {
5957 TheCall->setType(Context.VoidPtrTy);
5958 }
5959 return false;
5960 }
5961
5962 /// SemaBuiltinConstantArg - Handle a check if argument ArgNum of CallExpr
5963 /// TheCall is a constant expression.
5964 bool Sema::SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
5965 llvm::APSInt &Result) {
5966 Expr *Arg = TheCall->getArg(ArgNum);
5967 DeclRefExpr *DRE =cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
5968 FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
5969
5970 if (Arg->isTypeDependent() || Arg->isValueDependent()) return false;
5971
5972 if (!Arg->isIntegerConstantExpr(Result, Context))
5973 return Diag(TheCall->getBeginLoc(), diag::err_constant_integer_arg_type)
5974 << FDecl->getDeclName() << Arg->getSourceRange();
5975
5976 return false;
5977 }
5978
5979 /// SemaBuiltinConstantArgRange - Handle a check if argument ArgNum of CallExpr
5980 /// TheCall is a constant expression in the range [Low, High].
5981 bool Sema::SemaBuiltinConstantArgRange(CallExpr *TheCall, int ArgNum,
5982 int Low, int High, bool RangeIsError) {
5983 llvm::APSInt Result;
5984
5985 // We can't check the value of a dependent argument.
5986 Expr *Arg = TheCall->getArg(ArgNum);
5987 if (Arg->isTypeDependent() || Arg->isValueDependent())
5988 return false;
5989
5990 // Check constant-ness first.
5991 if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
5992 return true;
5993
5994 if (Result.getSExtValue() < Low || Result.getSExtValue() > High) {
5995 if (RangeIsError)
5996 return Diag(TheCall->getBeginLoc(), diag::err_argument_invalid_range)
5997 << Result.toString(10) << Low << High << Arg->getSourceRange();
5998 else
5999 // Defer the warning until we know if the code will be emitted so that
6000 // dead code can ignore this.
6001 DiagRuntimeBehavior(TheCall->getBeginLoc(), TheCall,
6002 PDiag(diag::warn_argument_invalid_range)
6003 << Result.toString(10) << Low << High
6004 << Arg->getSourceRange());
6005 }
6006
6007 return false;
6008 }
6009
6010 /// SemaBuiltinConstantArgMultiple - Handle a check if argument ArgNum of CallExpr
6011 /// TheCall is a constant expression is a multiple of Num..
6012 bool Sema::SemaBuiltinConstantArgMultiple(CallExpr *TheCall, int ArgNum,
6013 unsigned Num) {
6014 llvm::APSInt Result;
6015
6016 // We can't check the value of a dependent argument.
6017 Expr *Arg = TheCall->getArg(ArgNum);
6018 if (Arg->isTypeDependent() || Arg->isValueDependent())
6019 return false;
6020
6021 // Check constant-ness first.
6022 if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
6023 return true;
6024
6025 if (Result.getSExtValue() % Num != 0)
6026 return Diag(TheCall->getBeginLoc(), diag::err_argument_not_multiple)
6027 << Num << Arg->getSourceRange();
6028
6029 return false;
6030 }
6031
6032 /// SemaBuiltinARMSpecialReg - Handle a check if argument ArgNum of CallExpr
6033 /// TheCall is an ARM/AArch64 special register string literal.
6034 bool Sema::SemaBuiltinARMSpecialReg(unsigned BuiltinID, CallExpr *TheCall,
6035 int ArgNum, unsigned ExpectedFieldNum,
6036 bool AllowName) {
6037 bool IsARMBuiltin = BuiltinID == ARM::BI__builtin_arm_rsr64 ||
6038 BuiltinID == ARM::BI__builtin_arm_wsr64 ||
6039 BuiltinID == ARM::BI__builtin_arm_rsr ||
6040 BuiltinID == ARM::BI__builtin_arm_rsrp ||
6041 BuiltinID == ARM::BI__builtin_arm_wsr ||
6042 BuiltinID == ARM::BI__builtin_arm_wsrp;
6043 bool IsAArch64Builtin = BuiltinID == AArch64::BI__builtin_arm_rsr64 ||
6044 BuiltinID == AArch64::BI__builtin_arm_wsr64 ||
6045 BuiltinID == AArch64::BI__builtin_arm_rsr ||
6046 BuiltinID == AArch64::BI__builtin_arm_rsrp ||
6047 BuiltinID == AArch64::BI__builtin_arm_wsr ||
6048 BuiltinID == AArch64::BI__builtin_arm_wsrp;
6049 assert((IsARMBuiltin || IsAArch64Builtin) && "Unexpected ARM builtin.");
6050
6051 // We can't check the value of a dependent argument.
6052 Expr *Arg = TheCall->getArg(ArgNum);
6053 if (Arg->isTypeDependent() || Arg->isValueDependent())
6054 return false;
6055
6056 // Check if the argument is a string literal.
6057 if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
6058 return Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
6059 << Arg->getSourceRange();
6060
6061 // Check the type of special register given.
6062 StringRef Reg = cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
6063 SmallVector<StringRef, 6> Fields;
6064 Reg.split(Fields, ":");
6065
6066 if (Fields.size() != ExpectedFieldNum && !(AllowName && Fields.size() == 1))
6067 return Diag(TheCall->getBeginLoc(), diag::err_arm_invalid_specialreg)
6068 << Arg->getSourceRange();
6069
6070 // If the string is the name of a register then we cannot check that it is
6071 // valid here but if the string is of one the forms described in ACLE then we
6072 // can check that the supplied fields are integers and within the valid
6073 // ranges.
6074 if (Fields.size() > 1) {
6075 bool FiveFields = Fields.size() == 5;
6076
6077 bool ValidString = true;
6078 if (IsARMBuiltin) {
6079 ValidString &= Fields[0].startswith_lower("cp") ||
6080 Fields[0].startswith_lower("p");
6081 if (ValidString)
6082 Fields[0] =
6083 Fields[0].drop_front(Fields[0].startswith_lower("cp") ? 2 : 1);
6084
6085 ValidString &= Fields[2].startswith_lower("c");
6086 if (ValidString)
6087 Fields[2] = Fields[2].drop_front(1);
6088
6089 if (FiveFields) {
6090 ValidString &= Fields[3].startswith_lower("c");
6091 if (ValidString)
6092 Fields[3] = Fields[3].drop_front(1);
6093 }
6094 }
6095
6096 SmallVector<int, 5> Ranges;
6097 if (FiveFields)
6098 Ranges.append({IsAArch64Builtin ? 1 : 15, 7, 15, 15, 7});
6099 else
6100 Ranges.append({15, 7, 15});
6101
6102 for (unsigned i=0; i<Fields.size(); ++i) {
6103 int IntField;
6104 ValidString &= !Fields[i].getAsInteger(10, IntField);
6105 ValidString &= (IntField >= 0 && IntField <= Ranges[i]);
6106 }
6107
6108 if (!ValidString)
6109 return Diag(TheCall->getBeginLoc(), diag::err_arm_invalid_specialreg)
6110 << Arg->getSourceRange();
6111 } else if (IsAArch64Builtin && Fields.size() == 1) {
6112 // If the register name is one of those that appear in the condition below
6113 // and the special register builtin being used is one of the write builtins,
6114 // then we require that the argument provided for writing to the register
6115 // is an integer constant expression. This is because it will be lowered to
6116 // an MSR (immediate) instruction, so we need to know the immediate at
6117 // compile time.
6118 if (TheCall->getNumArgs() != 2)
6119 return false;
6120
6121 std::string RegLower = Reg.lower();
6122 if (RegLower != "spsel" && RegLower != "daifset" && RegLower != "daifclr" &&
6123 RegLower != "pan" && RegLower != "uao")
6124 return false;
6125
6126 return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15);
6127 }
6128
6129 return false;
6130 }
6131
6132 /// SemaBuiltinLongjmp - Handle __builtin_longjmp(void *env[5], int val).
6133 /// This checks that the target supports __builtin_longjmp and
6134 /// that val is a constant 1.
6135 bool Sema::SemaBuiltinLongjmp(CallExpr *TheCall) {
6136 if (!Context.getTargetInfo().hasSjLjLowering())
6137 return Diag(TheCall->getBeginLoc(), diag::err_builtin_longjmp_unsupported)
6138 << SourceRange(TheCall->getBeginLoc(), TheCall->getEndLoc());
6139
6140 Expr *Arg = TheCall->getArg(1);
6141 llvm::APSInt Result;
6142
6143 // TODO: This is less than ideal. Overload this to take a value.
6144 if (SemaBuiltinConstantArg(TheCall, 1, Result))
6145 return true;
6146
6147 if (Result != 1)
6148 return Diag(TheCall->getBeginLoc(), diag::err_builtin_longjmp_invalid_val)
6149 << SourceRange(Arg->getBeginLoc(), Arg->getEndLoc());
6150
6151 return false;
6152 }
6153
6154 /// SemaBuiltinSetjmp - Handle __builtin_setjmp(void *env[5]).
6155 /// This checks that the target supports __builtin_setjmp.
6156 bool Sema::SemaBuiltinSetjmp(CallExpr *TheCall) {
6157 if (!Context.getTargetInfo().hasSjLjLowering())
6158 return Diag(TheCall->getBeginLoc(), diag::err_builtin_setjmp_unsupported)
6159 << SourceRange(TheCall->getBeginLoc(), TheCall->getEndLoc());
6160 return false;
6161 }
6162
6163 namespace {
6164
6165 class UncoveredArgHandler {
6166 enum { Unknown = -1, AllCovered = -2 };
6167
6168 signed FirstUncoveredArg = Unknown;
6169 SmallVector<const Expr *, 4> DiagnosticExprs;
6170
6171 public:
6172 UncoveredArgHandler() = default;
6173
6174 bool hasUncoveredArg() const {
6175 return (FirstUncoveredArg >= 0);
6176 }
6177
6178 unsigned getUncoveredArg() const {
6179 assert(hasUncoveredArg() && "no uncovered argument");
6180 return FirstUncoveredArg;
6181 }
6182
6183 void setAllCovered() {
6184 // A string has been found with all arguments covered, so clear out
6185 // the diagnostics.
6186 DiagnosticExprs.clear();
6187 FirstUncoveredArg = AllCovered;
6188 }
6189
6190 void Update(signed NewFirstUncoveredArg, const Expr *StrExpr) {
6191 assert(NewFirstUncoveredArg >= 0 && "Outside range");
6192
6193 // Don't update if a previous string covers all arguments.
6194 if (FirstUncoveredArg == AllCovered)
6195 return;
6196
6197 // UncoveredArgHandler tracks the highest uncovered argument index
6198 // and with it all the strings that match this index.
6199 if (NewFirstUncoveredArg == FirstUncoveredArg)
6200 DiagnosticExprs.push_back(StrExpr);
6201 else if (NewFirstUncoveredArg > FirstUncoveredArg) {
6202 DiagnosticExprs.clear();
6203 DiagnosticExprs.push_back(StrExpr);
6204 FirstUncoveredArg = NewFirstUncoveredArg;
6205 }
6206 }
6207
6208 void Diagnose(Sema &S, bool IsFunctionCall, const Expr *ArgExpr);
6209 };
6210
6211 enum StringLiteralCheckType {
6212 SLCT_NotALiteral,
6213 SLCT_UncheckedLiteral,
6214 SLCT_CheckedLiteral
6215 };
6216
6217 } // namespace
6218
6219 static void sumOffsets(llvm::APSInt &Offset, llvm::APSInt Addend,
6220 BinaryOperatorKind BinOpKind,
6221 bool AddendIsRight) {
6222 unsigned BitWidth = Offset.getBitWidth();
6223 unsigned AddendBitWidth = Addend.getBitWidth();
6224 // There might be negative interim results.
6225 if (Addend.isUnsigned()) {
6226 Addend = Addend.zext(++AddendBitWidth);
6227 Addend.setIsSigned(true);
6228 }
6229 // Adjust the bit width of the APSInts.
6230 if (AddendBitWidth > BitWidth) {
6231 Offset = Offset.sext(AddendBitWidth);
6232 BitWidth = AddendBitWidth;
6233 } else if (BitWidth > AddendBitWidth) {
6234 Addend = Addend.sext(BitWidth);
6235 }
6236
6237 bool Ov = false;
6238 llvm::APSInt ResOffset = Offset;
6239 if (BinOpKind == BO_Add)
6240 ResOffset = Offset.sadd_ov(Addend, Ov);
6241 else {
6242 assert(AddendIsRight && BinOpKind == BO_Sub &&
6243 "operator must be add or sub with addend on the right");
6244 ResOffset = Offset.ssub_ov(Addend, Ov);
6245 }
6246
6247 // We add an offset to a pointer here so we should support an offset as big as
6248 // possible.
6249 if (Ov) {
6250 assert(BitWidth <= std::numeric_limits<unsigned>::max() / 2 &&
6251 "index (intermediate) result too big");
6252 Offset = Offset.sext(2 * BitWidth);
6253 sumOffsets(Offset, Addend, BinOpKind, AddendIsRight);
6254 return;
6255 }
6256
6257 Offset = ResOffset;
6258 }
6259
6260 namespace {
6261
6262 // This is a wrapper class around StringLiteral to support offsetted string
6263 // literals as format strings. It takes the offset into account when returning
6264 // the string and its length or the source locations to display notes correctly.
6265 class FormatStringLiteral {
6266 const StringLiteral *FExpr;
6267 int64_t Offset;
6268
6269 public:
6270 FormatStringLiteral(const StringLiteral *fexpr, int64_t Offset = 0)
6271 : FExpr(fexpr), Offset(Offset) {}
6272
6273 StringRef getString() const {
6274 return FExpr->getString().drop_front(Offset);
6275 }
6276
6277 unsigned getByteLength() const {
6278 return FExpr->getByteLength() - getCharByteWidth() * Offset;
6279 }
6280
6281 unsigned getLength() const { return FExpr->getLength() - Offset; }
6282 unsigned getCharByteWidth() const { return FExpr->getCharByteWidth(); }
6283
6284 StringLiteral::StringKind getKind() const { return FExpr->getKind(); }
6285
6286 QualType getType() const { return FExpr->getType(); }
6287
6288 bool isAscii() const { return FExpr->isAscii(); }
6289 bool isWide() const { return FExpr->isWide(); }
6290 bool isUTF8() const { return FExpr->isUTF8(); }
6291 bool isUTF16() const { return FExpr->isUTF16(); }
6292 bool isUTF32() const { return FExpr->isUTF32(); }
6293 bool isPascal() const { return FExpr->isPascal(); }
6294
6295 SourceLocation getLocationOfByte(
6296 unsigned ByteNo, const SourceManager &SM, const LangOptions &Features,
6297 const TargetInfo &Target, unsigned *StartToken = nullptr,
6298 unsigned *StartTokenByteOffset = nullptr) const {
6299 return FExpr->getLocationOfByte(ByteNo + Offset, SM, Features, Target,
6300 StartToken, StartTokenByteOffset);
6301 }
6302
6303 SourceLocation getBeginLoc() const LLVM_READONLY {
6304 return FExpr->getBeginLoc().getLocWithOffset(Offset);
6305 }
6306
6307 SourceLocation getEndLoc() const LLVM_READONLY { return FExpr->getEndLoc(); }
6308 };
6309
6310 } // namespace
6311
6312 static void CheckFormatString(Sema &S, const FormatStringLiteral *FExpr,
6313 const Expr *OrigFormatExpr,
6314 ArrayRef<const Expr *> Args,
6315 bool HasVAListArg, unsigned format_idx,
6316 unsigned firstDataArg,
6317 Sema::FormatStringType Type,
6318 bool inFunctionCall,
6319 Sema::VariadicCallType CallType,
6320 llvm::SmallBitVector &CheckedVarArgs,
6321 UncoveredArgHandler &UncoveredArg);
6322
6323 // Determine if an expression is a string literal or constant string.
6324 // If this function returns false on the arguments to a function expecting a
6325 // format string, we will usually need to emit a warning.
6326 // True string literals are then checked by CheckFormatString.
6327 static StringLiteralCheckType
6328 checkFormatStringExpr(Sema &S, const Expr *E, ArrayRef<const Expr *> Args,
6329 bool HasVAListArg, unsigned format_idx,
6330 unsigned firstDataArg, Sema::FormatStringType Type,
6331 Sema::VariadicCallType CallType, bool InFunctionCall,
6332 llvm::SmallBitVector &CheckedVarArgs,
6333 UncoveredArgHandler &UncoveredArg,
6334 llvm::APSInt Offset) {
6335 tryAgain:
6336 assert(Offset.isSigned() && "invalid offset");
6337
6338 if (E->isTypeDependent() || E->isValueDependent())
6339 return SLCT_NotALiteral;
6340
6341 E = E->IgnoreParenCasts();
6342
6343 if (E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull))
6344 // Technically -Wformat-nonliteral does not warn about this case.
6345 // The behavior of printf and friends in this case is implementation
6346 // dependent. Ideally if the format string cannot be null then
6347 // it should have a 'nonnull' attribute in the function prototype.
6348 return SLCT_UncheckedLiteral;
6349
6350 switch (E->getStmtClass()) {
6351 case Stmt::BinaryConditionalOperatorClass:
6352 case Stmt::ConditionalOperatorClass: {
6353 // The expression is a literal if both sub-expressions were, and it was
6354 // completely checked only if both sub-expressions were checked.
6355 const AbstractConditionalOperator *C =
6356 cast<AbstractConditionalOperator>(E);
6357
6358 // Determine whether it is necessary to check both sub-expressions, for
6359 // example, because the condition expression is a constant that can be
6360 // evaluated at compile time.
6361 bool CheckLeft = true, CheckRight = true;
6362
6363 bool Cond;
6364 if (C->getCond()->EvaluateAsBooleanCondition(Cond, S.getASTContext())) {
6365 if (Cond)
6366 CheckRight = false;
6367 else
6368 CheckLeft = false;
6369 }
6370
6371 // We need to maintain the offsets for the right and the left hand side
6372 // separately to check if every possible indexed expression is a valid
6373 // string literal. They might have different offsets for different string
6374 // literals in the end.
6375 StringLiteralCheckType Left;
6376 if (!CheckLeft)
6377 Left = SLCT_UncheckedLiteral;
6378 else {
6379 Left = checkFormatStringExpr(S, C->getTrueExpr(), Args,
6380 HasVAListArg, format_idx, firstDataArg,
6381 Type, CallType, InFunctionCall,
6382 CheckedVarArgs, UncoveredArg, Offset);
6383 if (Left == SLCT_NotALiteral || !CheckRight) {
6384 return Left;
6385 }
6386 }
6387
6388 StringLiteralCheckType Right =
6389 checkFormatStringExpr(S, C->getFalseExpr(), Args,
6390 HasVAListArg, format_idx, firstDataArg,
6391 Type, CallType, InFunctionCall, CheckedVarArgs,
6392 UncoveredArg, Offset);
6393
6394 return (CheckLeft && Left < Right) ? Left : Right;
6395 }
6396
6397 case Stmt::ImplicitCastExprClass:
6398 E = cast<ImplicitCastExpr>(E)->getSubExpr();
6399 goto tryAgain;
6400
6401 case Stmt::OpaqueValueExprClass:
6402 if (const Expr *src = cast<OpaqueValueExpr>(E)->getSourceExpr()) {
6403 E = src;
6404 goto tryAgain;
6405 }
6406 return SLCT_NotALiteral;
6407
6408 case Stmt::PredefinedExprClass:
6409 // While __func__, etc., are technically not string literals, they
6410 // cannot contain format specifiers and thus are not a security
6411 // liability.
6412 return SLCT_UncheckedLiteral;
6413
6414 case Stmt::DeclRefExprClass: {
6415 const DeclRefExpr *DR = cast<DeclRefExpr>(E);
6416
6417 // As an exception, do not flag errors for variables binding to
6418 // const string literals.
6419 if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
6420 bool isConstant = false;
6421 QualType T = DR->getType();
6422
6423 if (const ArrayType *AT = S.Context.getAsArrayType(T)) {
6424 isConstant = AT->getElementType().isConstant(S.Context);
6425 } else if (const PointerType *PT = T->getAs<PointerType>()) {
6426 isConstant = T.isConstant(S.Context) &&
6427 PT->getPointeeType().isConstant(S.Context);
6428 } else if (T->isObjCObjectPointerType()) {
6429 // In ObjC, there is usually no "const ObjectPointer" type,
6430 // so don't check if the pointee type is constant.
6431 isConstant = T.isConstant(S.Context);
6432 }
6433
6434 if (isConstant) {
6435 if (const Expr *Init = VD->getAnyInitializer()) {
6436 // Look through initializers like const char c[] = { "foo" }
6437 if (const InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) {
6438 if (InitList->isStringLiteralInit())
6439 Init = InitList->getInit(0)->IgnoreParenImpCasts();
6440 }
6441 return checkFormatStringExpr(S, Init, Args,
6442 HasVAListArg, format_idx,
6443 firstDataArg, Type, CallType,
6444 /*InFunctionCall*/ false, CheckedVarArgs,
6445 UncoveredArg, Offset);
6446 }
6447 }
6448
6449 // For vprintf* functions (i.e., HasVAListArg==true), we add a
6450 // special check to see if the format string is a function parameter
6451 // of the function calling the printf function. If the function
6452 // has an attribute indicating it is a printf-like function, then we
6453 // should suppress warnings concerning non-literals being used in a call
6454 // to a vprintf function. For example:
6455 //
6456 // void
6457 // logmessage(char const *fmt __attribute__ (format (printf, 1, 2)), ...){
6458 // va_list ap;
6459 // va_start(ap, fmt);
6460 // vprintf(fmt, ap); // Do NOT emit a warning about "fmt".
6461 // ...
6462 // }
6463 if (HasVAListArg) {
6464 if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(VD)) {
6465 if (const NamedDecl *ND = dyn_cast<NamedDecl>(PV->getDeclContext())) {
6466 int PVIndex = PV->getFunctionScopeIndex() + 1;
6467 for (const auto *PVFormat : ND->specific_attrs<FormatAttr>()) {
6468 // adjust for implicit parameter
6469 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND))
6470 if (MD->isInstance())
6471 ++PVIndex;
6472 // We also check if the formats are compatible.
6473 // We can't pass a 'scanf' string to a 'printf' function.
6474 if (PVIndex == PVFormat->getFormatIdx() &&
6475 Type == S.GetFormatStringType(PVFormat))
6476 return SLCT_UncheckedLiteral;
6477 }
6478 }
6479 }
6480 }
6481 }
6482
6483 return SLCT_NotALiteral;
6484 }
6485
6486 case Stmt::CallExprClass:
6487 case Stmt::CXXMemberCallExprClass: {
6488 const CallExpr *CE = cast<CallExpr>(E);
6489 if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(CE->getCalleeDecl())) {
6490 bool IsFirst = true;
6491 StringLiteralCheckType CommonResult;
6492 for (const auto *FA : ND->specific_attrs<FormatArgAttr>()) {
6493 const Expr *Arg = CE->getArg(FA->getFormatIdx().getASTIndex());
6494 StringLiteralCheckType Result = checkFormatStringExpr(
6495 S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type,
6496 CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset);
6497 if (IsFirst) {
6498 CommonResult = Result;
6499 IsFirst = false;
6500 }
6501 }
6502 if (!IsFirst)
6503 return CommonResult;
6504
6505 if (const auto *FD = dyn_cast<FunctionDecl>(ND)) {
6506 unsigned BuiltinID = FD->getBuiltinID();
6507 if (BuiltinID == Builtin::BI__builtin___CFStringMakeConstantString ||
6508 BuiltinID == Builtin::BI__builtin___NSStringMakeConstantString) {
6509 const Expr *Arg = CE->getArg(0);
6510 return checkFormatStringExpr(S, Arg, Args,
6511 HasVAListArg, format_idx,
6512 firstDataArg, Type, CallType,
6513 InFunctionCall, CheckedVarArgs,
6514 UncoveredArg, Offset);
6515 }
6516 }
6517 }
6518
6519 return SLCT_NotALiteral;
6520 }
6521 case Stmt::ObjCMessageExprClass: {
6522 const auto *ME = cast<ObjCMessageExpr>(E);
6523 if (const auto *ND = ME->getMethodDecl()) {
6524 if (const auto *FA = ND->getAttr<FormatArgAttr>()) {
6525 const Expr *Arg = ME->getArg(FA->getFormatIdx().getASTIndex());
6526 return checkFormatStringExpr(
6527 S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type,
6528 CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset);
6529 }
6530 }
6531
6532 return SLCT_NotALiteral;
6533 }
6534 case Stmt::ObjCStringLiteralClass:
6535 case Stmt::StringLiteralClass: {
6536 const StringLiteral *StrE = nullptr;
6537
6538 if (const ObjCStringLiteral *ObjCFExpr = dyn_cast<ObjCStringLiteral>(E))
6539 StrE = ObjCFExpr->getString();
6540 else
6541 StrE = cast<StringLiteral>(E);
6542
6543 if (StrE) {
6544 if (Offset.isNegative() || Offset > StrE->getLength()) {
6545 // TODO: It would be better to have an explicit warning for out of
6546 // bounds literals.
6547 return SLCT_NotALiteral;
6548 }
6549 FormatStringLiteral FStr(StrE, Offset.sextOrTrunc(64).getSExtValue());
6550 CheckFormatString(S, &FStr, E, Args, HasVAListArg, format_idx,
6551 firstDataArg, Type, InFunctionCall, CallType,
6552 CheckedVarArgs, UncoveredArg);
6553 return SLCT_CheckedLiteral;
6554 }
6555
6556 return SLCT_NotALiteral;
6557 }
6558 case Stmt::BinaryOperatorClass: {
6559 const BinaryOperator *BinOp = cast<BinaryOperator>(E);
6560
6561 // A string literal + an int offset is still a string literal.
6562 if (BinOp->isAdditiveOp()) {
6563 Expr::EvalResult LResult, RResult;
6564
6565 bool LIsInt = BinOp->getLHS()->EvaluateAsInt(LResult, S.Context);
6566 bool RIsInt = BinOp->getRHS()->EvaluateAsInt(RResult, S.Context);
6567
6568 if (LIsInt != RIsInt) {
6569 BinaryOperatorKind BinOpKind = BinOp->getOpcode();
6570
6571 if (LIsInt) {
6572 if (BinOpKind == BO_Add) {
6573 sumOffsets(Offset, LResult.Val.getInt(), BinOpKind, RIsInt);
6574 E = BinOp->getRHS();
6575 goto tryAgain;
6576 }
6577 } else {
6578 sumOffsets(Offset, RResult.Val.getInt(), BinOpKind, RIsInt);
6579 E = BinOp->getLHS();
6580 goto tryAgain;
6581 }
6582 }
6583 }
6584
6585 return SLCT_NotALiteral;
6586 }
6587 case Stmt::UnaryOperatorClass: {
6588 const UnaryOperator *UnaOp = cast<UnaryOperator>(E);
6589 auto ASE = dyn_cast<ArraySubscriptExpr>(UnaOp->getSubExpr());
6590 if (UnaOp->getOpcode() == UO_AddrOf && ASE) {
6591 Expr::EvalResult IndexResult;
6592 if (ASE->getRHS()->EvaluateAsInt(IndexResult, S.Context)) {
6593 sumOffsets(Offset, IndexResult.Val.getInt(), BO_Add,
6594 /*RHS is int*/ true);
6595 E = ASE->getBase();
6596 goto tryAgain;
6597 }
6598 }
6599
6600 return SLCT_NotALiteral;
6601 }
6602
6603 default:
6604 return SLCT_NotALiteral;
6605 }
6606 }
6607
6608 Sema::FormatStringType Sema::GetFormatStringType(const FormatAttr *Format) {
6609 return llvm::StringSwitch<FormatStringType>(Format->getType()->getName())
6610 .Case("scanf", FST_Scanf)
6611 .Cases("printf", "printf0", FST_Printf)
6612 .Cases("NSString", "CFString", FST_NSString)
6613 .Case("strftime", FST_Strftime)
6614 .Case("strfmon", FST_Strfmon)
6615 .Cases("kprintf", "cmn_err", "vcmn_err", "zcmn_err", FST_Kprintf)
6616 .Case("freebsd_kprintf", FST_FreeBSDKPrintf)
6617 .Case("os_trace", FST_OSLog)
6618 .Case("os_log", FST_OSLog)
6619 .Default(FST_Unknown);
6620 }
6621
6622 /// CheckFormatArguments - Check calls to printf and scanf (and similar
6623 /// functions) for correct use of format strings.
6624 /// Returns true if a format string has been fully checked.
6625 bool Sema::CheckFormatArguments(const FormatAttr *Format,
6626 ArrayRef<const Expr *> Args,
6627 bool IsCXXMember,
6628 VariadicCallType CallType,
6629 SourceLocation Loc, SourceRange Range,
6630 llvm::SmallBitVector &CheckedVarArgs) {
6631 FormatStringInfo FSI;
6632 if (getFormatStringInfo(Format, IsCXXMember, &FSI))
6633 return CheckFormatArguments(Args, FSI.HasVAListArg, FSI.FormatIdx,
6634 FSI.FirstDataArg, GetFormatStringType(Format),
6635 CallType, Loc, Range, CheckedVarArgs);
6636 return false;
6637 }
6638
6639 bool Sema::CheckFormatArguments(ArrayRef<const Expr *> Args,
6640 bool HasVAListArg, unsigned format_idx,
6641 unsigned firstDataArg, FormatStringType Type,
6642 VariadicCallType CallType,
6643 SourceLocation Loc, SourceRange Range,
6644 llvm::SmallBitVector &CheckedVarArgs) {
6645 // CHECK: printf/scanf-like function is called with no format string.
6646 if (format_idx >= Args.size()) {
6647 Diag(Loc, diag::warn_missing_format_string) << Range;
6648 return false;
6649 }
6650
6651 const Expr *OrigFormatExpr = Args[format_idx]->IgnoreParenCasts();
6652
6653 // CHECK: format string is not a string literal.
6654 //
6655 // Dynamically generated format strings are difficult to
6656 // automatically vet at compile time. Requiring that format strings
6657 // are string literals: (1) permits the checking of format strings by
6658 // the compiler and thereby (2) can practically remove the source of
6659 // many format string exploits.
6660
6661 // Format string can be either ObjC string (e.g. @"%d") or
6662 // C string (e.g. "%d")
6663 // ObjC string uses the same format specifiers as C string, so we can use
6664 // the same format string checking logic for both ObjC and C strings.
6665 UncoveredArgHandler UncoveredArg;
6666 StringLiteralCheckType CT =
6667 checkFormatStringExpr(*this, OrigFormatExpr, Args, HasVAListArg,
6668 format_idx, firstDataArg, Type, CallType,
6669 /*IsFunctionCall*/ true, CheckedVarArgs,
6670 UncoveredArg,
6671 /*no string offset*/ llvm::APSInt(64, false) = 0);
6672
6673 // Generate a diagnostic where an uncovered argument is detected.
6674 if (UncoveredArg.hasUncoveredArg()) {
6675 unsigned ArgIdx = UncoveredArg.getUncoveredArg() + firstDataArg;
6676 assert(ArgIdx < Args.size() && "ArgIdx outside bounds");
6677 UncoveredArg.Diagnose(*this, /*IsFunctionCall*/true, Args[ArgIdx]);
6678 }
6679
6680 if (CT != SLCT_NotALiteral)
6681 // Literal format string found, check done!
6682 return CT == SLCT_CheckedLiteral;
6683
6684 // Strftime is particular as it always uses a single 'time' argument,
6685 // so it is safe to pass a non-literal string.
6686 if (Type == FST_Strftime)
6687 return false;
6688
6689 // Do not emit diag when the string param is a macro expansion and the
6690 // format is either NSString or CFString. This is a hack to prevent
6691 // diag when using the NSLocalizedString and CFCopyLocalizedString macros
6692 // which are usually used in place of NS and CF string literals.
6693 SourceLocation FormatLoc = Args[format_idx]->getBeginLoc();
6694 if (Type == FST_NSString && SourceMgr.isInSystemMacro(FormatLoc))
6695 return false;
6696
6697 // If there are no arguments specified, warn with -Wformat-security, otherwise
6698 // warn only with -Wformat-nonliteral.
6699 if (Args.size() == firstDataArg) {
6700 Diag(FormatLoc, diag::warn_format_nonliteral_noargs)
6701 << OrigFormatExpr->getSourceRange();
6702 switch (Type) {
6703 default:
6704 break;
6705 case FST_Kprintf:
6706 case FST_FreeBSDKPrintf:
6707 case FST_Printf:
6708 Diag(FormatLoc, diag::note_format_security_fixit)
6709 << FixItHint::CreateInsertion(FormatLoc, "\"%s\", ");
6710 break;
6711 case FST_NSString:
6712 Diag(FormatLoc, diag::note_format_security_fixit)
6713 << FixItHint::CreateInsertion(FormatLoc, "@\"%@\", ");
6714 break;
6715 }
6716 } else {
6717 Diag(FormatLoc, diag::warn_format_nonliteral)
6718 << OrigFormatExpr->getSourceRange();
6719 }
6720 return false;
6721 }
6722
6723 namespace {
6724
6725 class CheckFormatHandler : public analyze_format_string::FormatStringHandler {
6726 protected:
6727 Sema &S;
6728 const FormatStringLiteral *FExpr;
6729 const Expr *OrigFormatExpr;
6730 const Sema::FormatStringType FSType;
6731 const unsigned FirstDataArg;
6732 const unsigned NumDataArgs;
6733 const char *Beg; // Start of format string.
6734 const bool HasVAListArg;
6735 ArrayRef<const Expr *> Args;
6736 unsigned FormatIdx;
6737 llvm::SmallBitVector CoveredArgs;
6738 bool usesPositionalArgs = false;
6739 bool atFirstArg = true;
6740 bool inFunctionCall;
6741 Sema::VariadicCallType CallType;
6742 llvm::SmallBitVector &CheckedVarArgs;
6743 UncoveredArgHandler &UncoveredArg;
6744
6745 public:
6746 CheckFormatHandler(Sema &s, const FormatStringLiteral *fexpr,
6747 const Expr *origFormatExpr,
6748 const Sema::FormatStringType type, unsigned firstDataArg,
6749 unsigned numDataArgs, const char *beg, bool hasVAListArg,
6750 ArrayRef<const Expr *> Args, unsigned formatIdx,
6751 bool inFunctionCall, Sema::VariadicCallType callType,
6752 llvm::SmallBitVector &CheckedVarArgs,
6753 UncoveredArgHandler &UncoveredArg)
6754 : S(s), FExpr(fexpr), OrigFormatExpr(origFormatExpr), FSType(type),
6755 FirstDataArg(firstDataArg), NumDataArgs(numDataArgs), Beg(beg),
6756 HasVAListArg(hasVAListArg), Args(Args), FormatIdx(formatIdx),
6757 inFunctionCall(inFunctionCall), CallType(callType),
6758 CheckedVarArgs(CheckedVarArgs), UncoveredArg(UncoveredArg) {
6759 CoveredArgs.resize(numDataArgs);
6760 CoveredArgs.reset();
6761 }
6762
6763 void DoneProcessing();
6764
6765 void HandleIncompleteSpecifier(const char *startSpecifier,
6766 unsigned specifierLen) override;
6767
6768 void HandleInvalidLengthModifier(
6769 const analyze_format_string::FormatSpecifier &FS,
6770 const analyze_format_string::ConversionSpecifier &CS,
6771 const char *startSpecifier, unsigned specifierLen,
6772 unsigned DiagID);
6773
6774 void HandleNonStandardLengthModifier(
6775 const analyze_format_string::FormatSpecifier &FS,
6776 const char *startSpecifier, unsigned specifierLen);
6777
6778 void HandleNonStandardConversionSpecifier(
6779 const analyze_format_string::ConversionSpecifier &CS,
6780 const char *startSpecifier, unsigned specifierLen);
6781
6782 void HandlePosition(const char *startPos, unsigned posLen) override;
6783
6784 void HandleInvalidPosition(const char *startSpecifier,
6785 unsigned specifierLen,
6786 analyze_format_string::PositionContext p) override;
6787
6788 void HandleZeroPosition(const char *startPos, unsigned posLen) override;
6789
6790 void HandleNullChar(const char *nullCharacter) override;
6791
6792 template <typename Range>
6793 static void
6794 EmitFormatDiagnostic(Sema &S, bool inFunctionCall, const Expr *ArgumentExpr,
6795 const PartialDiagnostic &PDiag, SourceLocation StringLoc,
6796 bool IsStringLocation, Range StringRange,
6797 ArrayRef<FixItHint> Fixit = None);
6798
6799 protected:
6800 bool HandleInvalidConversionSpecifier(unsigned argIndex, SourceLocation Loc,
6801 const char *startSpec,
6802 unsigned specifierLen,
6803 const char *csStart, unsigned csLen);
6804
6805 void HandlePositionalNonpositionalArgs(SourceLocation Loc,
6806 const char *startSpec,
6807 unsigned specifierLen);
6808
6809 SourceRange getFormatStringRange();
6810 CharSourceRange getSpecifierRange(const char *startSpecifier,
6811 unsigned specifierLen);
6812 SourceLocation getLocationOfByte(const char *x);
6813
6814 const Expr *getDataArg(unsigned i) const;
6815
6816 bool CheckNumArgs(const analyze_format_string::FormatSpecifier &FS,
6817 const analyze_format_string::ConversionSpecifier &CS,
6818 const char *startSpecifier, unsigned specifierLen,
6819 unsigned argIndex);
6820
6821 template <typename Range>
6822 void EmitFormatDiagnostic(PartialDiagnostic PDiag, SourceLocation StringLoc,
6823 bool IsStringLocation, Range StringRange,
6824 ArrayRef<FixItHint> Fixit = None);
6825 };
6826
6827 } // namespace
6828
6829 SourceRange CheckFormatHandler::getFormatStringRange() {
6830 return OrigFormatExpr->getSourceRange();
6831 }
6832
6833 CharSourceRange CheckFormatHandler::
6834 getSpecifierRange(const char *startSpecifier, unsigned specifierLen) {
6835 SourceLocation Start = getLocationOfByte(startSpecifier);
6836 SourceLocation End = getLocationOfByte(startSpecifier + specifierLen - 1);
6837
6838 // Advance the end SourceLocation by one due to half-open ranges.
6839 End = End.getLocWithOffset(1);
6840
6841 return CharSourceRange::getCharRange(Start, End);
6842 }
6843
6844 SourceLocation CheckFormatHandler::getLocationOfByte(const char *x) {
6845 return FExpr->getLocationOfByte(x - Beg, S.getSourceManager(),
6846 S.getLangOpts(), S.Context.getTargetInfo());
6847 }
6848
6849 void CheckFormatHandler::HandleIncompleteSpecifier(const char *startSpecifier,
6850 unsigned specifierLen){
6851 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_incomplete_specifier),
6852 getLocationOfByte(startSpecifier),
6853 /*IsStringLocation*/true,
6854 getSpecifierRange(startSpecifier, specifierLen));
6855 }
6856
6857 void CheckFormatHandler::HandleInvalidLengthModifier(
6858 const analyze_format_string::FormatSpecifier &FS,
6859 const analyze_format_string::ConversionSpecifier &CS,
6860 const char *startSpecifier, unsigned specifierLen, unsigned DiagID) {
6861 using namespace analyze_format_string;
6862
6863 const LengthModifier &LM = FS.getLengthModifier();
6864 CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
6865
6866 // See if we know how to fix this length modifier.
6867 Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
6868 if (FixedLM) {
6869 EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
6870 getLocationOfByte(LM.getStart()),
6871 /*IsStringLocation*/true,
6872 getSpecifierRange(startSpecifier, specifierLen));
6873
6874 S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
6875 << FixedLM->toString()
6876 << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
6877
6878 } else {
6879 FixItHint Hint;
6880 if (DiagID == diag::warn_format_nonsensical_length)
6881 Hint = FixItHint::CreateRemoval(LMRange);
6882
6883 EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
6884 getLocationOfByte(LM.getStart()),
6885 /*IsStringLocation*/true,
6886 getSpecifierRange(startSpecifier, specifierLen),
6887 Hint);
6888 }
6889 }
6890
6891 void CheckFormatHandler::HandleNonStandardLengthModifier(
6892 const analyze_format_string::FormatSpecifier &FS,
6893 const char *startSpecifier, unsigned specifierLen) {
6894 using namespace analyze_format_string;
6895
6896 const LengthModifier &LM = FS.getLengthModifier();
6897 CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
6898
6899 // See if we know how to fix this length modifier.
6900 Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
6901 if (FixedLM) {
6902 EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
6903 << LM.toString() << 0,
6904 getLocationOfByte(LM.getStart()),
6905 /*IsStringLocation*/true,
6906 getSpecifierRange(startSpecifier, specifierLen));
6907
6908 S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
6909 << FixedLM->toString()
6910 << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
6911
6912 } else {
6913 EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
6914 << LM.toString() << 0,
6915 getLocationOfByte(LM.getStart()),
6916 /*IsStringLocation*/true,
6917 getSpecifierRange(startSpecifier, specifierLen));
6918 }
6919 }
6920
6921 void CheckFormatHandler::HandleNonStandardConversionSpecifier(
6922 const analyze_format_string::ConversionSpecifier &CS,
6923 const char *startSpecifier, unsigned specifierLen) {
6924 using namespace analyze_format_string;
6925
6926 // See if we know how to fix this conversion specifier.
6927 Optional<ConversionSpecifier> FixedCS = CS.getStandardSpecifier();
6928 if (FixedCS) {
6929 EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
6930 << CS.toString() << /*conversion specifier*/1,
6931 getLocationOfByte(CS.getStart()),
6932 /*IsStringLocation*/true,
6933 getSpecifierRange(startSpecifier, specifierLen));
6934
6935 CharSourceRange CSRange = getSpecifierRange(CS.getStart(), CS.getLength());
6936 S.Diag(getLocationOfByte(CS.getStart()), diag::note_format_fix_specifier)
6937 << FixedCS->toString()
6938 << FixItHint::CreateReplacement(CSRange, FixedCS->toString());
6939 } else {
6940 EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
6941 << CS.toString() << /*conversion specifier*/1,
6942 getLocationOfByte(CS.getStart()),
6943 /*IsStringLocation*/true,
6944 getSpecifierRange(startSpecifier, specifierLen));
6945 }
6946 }
6947
6948 void CheckFormatHandler::HandlePosition(const char *startPos,
6949 unsigned posLen) {
6950 EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard_positional_arg),
6951 getLocationOfByte(startPos),
6952 /*IsStringLocation*/true,
6953 getSpecifierRange(startPos, posLen));
6954 }
6955
6956 void
6957 CheckFormatHandler::HandleInvalidPosition(const char *startPos, unsigned posLen,
6958 analyze_format_string::PositionContext p) {
6959 EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_positional_specifier)
6960 << (unsigned) p,
6961 getLocationOfByte(startPos), /*IsStringLocation*/true,
6962 getSpecifierRange(startPos, posLen));
6963 }
6964
6965 void CheckFormatHandler::HandleZeroPosition(const char *startPos,
6966 unsigned posLen) {
6967 EmitFormatDiagnostic(S.PDiag(diag::warn_format_zero_positional_specifier),
6968 getLocationOfByte(startPos),
6969 /*IsStringLocation*/true,
6970 getSpecifierRange(startPos, posLen));
6971 }
6972
6973 void CheckFormatHandler::HandleNullChar(const char *nullCharacter) {
6974 if (!isa<ObjCStringLiteral>(OrigFormatExpr)) {
6975 // The presence of a null character is likely an error.
6976 EmitFormatDiagnostic(
6977 S.PDiag(diag::warn_printf_format_string_contains_null_char),
6978 getLocationOfByte(nullCharacter), /*IsStringLocation*/true,
6979 getFormatStringRange());
6980 }
6981 }
6982
6983 // Note that this may return NULL if there was an error parsing or building
6984 // one of the argument expressions.
6985 const Expr *CheckFormatHandler::getDataArg(unsigned i) const {
6986 return Args[FirstDataArg + i];
6987 }
6988
6989 void CheckFormatHandler::DoneProcessing() {
6990 // Does the number of data arguments exceed the number of
6991 // format conversions in the format string?
6992 if (!HasVAListArg) {
6993 // Find any arguments that weren't covered.
6994 CoveredArgs.flip();
6995 signed notCoveredArg = CoveredArgs.find_first();
6996 if (notCoveredArg >= 0) {
6997 assert((unsigned)notCoveredArg < NumDataArgs);
6998 UncoveredArg.Update(notCoveredArg, OrigFormatExpr);
6999 } else {
7000 UncoveredArg.setAllCovered();
7001 }
7002 }
7003 }
7004
7005 void UncoveredArgHandler::Diagnose(Sema &S, bool IsFunctionCall,
7006 const Expr *ArgExpr) {
7007 assert(hasUncoveredArg() && DiagnosticExprs.size() > 0 &&
7008 "Invalid state");
7009
7010 if (!ArgExpr)
7011 return;
7012
7013 SourceLocation Loc = ArgExpr->getBeginLoc();
7014
7015 if (S.getSourceManager().isInSystemMacro(Loc))
7016 return;
7017
7018 PartialDiagnostic PDiag = S.PDiag(diag::warn_printf_data_arg_not_used);
7019 for (auto E : DiagnosticExprs)
7020 PDiag << E->getSourceRange();
7021
7022 CheckFormatHandler::EmitFormatDiagnostic(
7023 S, IsFunctionCall, DiagnosticExprs[0],
7024 PDiag, Loc, /*IsStringLocation*/false,
7025 DiagnosticExprs[0]->getSourceRange());
7026 }
7027
7028 bool
7029 CheckFormatHandler::HandleInvalidConversionSpecifier(unsigned argIndex,
7030 SourceLocation Loc,
7031 const char *startSpec,
7032 unsigned specifierLen,
7033 const char *csStart,
7034 unsigned csLen) {
7035 bool keepGoing = true;
7036 if (argIndex < NumDataArgs) {
7037 // Consider the argument coverered, even though the specifier doesn't
7038 // make sense.
7039 CoveredArgs.set(argIndex);
7040 }
7041 else {
7042 // If argIndex exceeds the number of data arguments we
7043 // don't issue a warning because that is just a cascade of warnings (and
7044 // they may have intended '%%' anyway). We don't want to continue processing
7045 // the format string after this point, however, as we will like just get
7046 // gibberish when trying to match arguments.
7047 keepGoing = false;
7048 }
7049
7050 StringRef Specifier(csStart, csLen);
7051
7052 // If the specifier in non-printable, it could be the first byte of a UTF-8
7053 // sequence. In that case, print the UTF-8 code point. If not, print the byte
7054 // hex value.
7055 std::string CodePointStr;
7056 if (!llvm::sys::locale::isPrint(*csStart)) {
7057 llvm::UTF32 CodePoint;
7058 const llvm::UTF8 **B = reinterpret_cast<const llvm::UTF8 **>(&csStart);
7059 const llvm::UTF8 *E =
7060 reinterpret_cast<const llvm::UTF8 *>(csStart + csLen);
7061 llvm::ConversionResult Result =
7062 llvm::convertUTF8Sequence(B, E, &CodePoint, llvm::strictConversion);
7063
7064 if (Result != llvm::conversionOK) {
7065 unsigned char FirstChar = *csStart;
7066 CodePoint = (llvm::UTF32)FirstChar;
7067 }
7068
7069 llvm::raw_string_ostream OS(CodePointStr);
7070 if (CodePoint < 256)
7071 OS << "\\x" << llvm::format("%02x", CodePoint);
7072 else if (CodePoint <= 0xFFFF)
7073 OS << "\\u" << llvm::format("%04x", CodePoint);
7074 else
7075 OS << "\\U" << llvm::format("%08x", CodePoint);
7076 OS.flush();
7077 Specifier = CodePointStr;
7078 }
7079
7080 EmitFormatDiagnostic(
7081 S.PDiag(diag::warn_format_invalid_conversion) << Specifier, Loc,
7082 /*IsStringLocation*/ true, getSpecifierRange(startSpec, specifierLen));
7083
7084 return keepGoing;
7085 }
7086
7087 void
7088 CheckFormatHandler::HandlePositionalNonpositionalArgs(SourceLocation Loc,
7089 const char *startSpec,
7090 unsigned specifierLen) {
7091 EmitFormatDiagnostic(
7092 S.PDiag(diag::warn_format_mix_positional_nonpositional_args),
7093 Loc, /*isStringLoc*/true, getSpecifierRange(startSpec, specifierLen));
7094 }
7095
7096 bool
7097 CheckFormatHandler::CheckNumArgs(
7098 const analyze_format_string::FormatSpecifier &FS,
7099 const analyze_format_string::ConversionSpecifier &CS,
7100 const char *startSpecifier, unsigned specifierLen, unsigned argIndex) {
7101
7102 if (argIndex >= NumDataArgs) {
7103 PartialDiagnostic PDiag = FS.usesPositionalArg()
7104 ? (S.PDiag(diag::warn_printf_positional_arg_exceeds_data_args)
7105 << (argIndex+1) << NumDataArgs)
7106 : S.PDiag(diag::warn_printf_insufficient_data_args);
7107 EmitFormatDiagnostic(
7108 PDiag, getLocationOfByte(CS.getStart()), /*IsStringLocation*/true,
7109 getSpecifierRange(startSpecifier, specifierLen));
7110
7111 // Since more arguments than conversion tokens are given, by extension
7112 // all arguments are covered, so mark this as so.
7113 UncoveredArg.setAllCovered();
7114 return false;
7115 }
7116 return true;
7117 }
7118
7119 template<typename Range>
7120 void CheckFormatHandler::EmitFormatDiagnostic(PartialDiagnostic PDiag,
7121 SourceLocation Loc,
7122 bool IsStringLocation,
7123 Range StringRange,
7124 ArrayRef<FixItHint> FixIt) {
7125 EmitFormatDiagnostic(S, inFunctionCall, Args[FormatIdx], PDiag,
7126 Loc, IsStringLocation, StringRange, FixIt);
7127 }
7128
7129 /// If the format string is not within the function call, emit a note
7130 /// so that the function call and string are in diagnostic messages.
7131 ///
7132 /// \param InFunctionCall if true, the format string is within the function
7133 /// call and only one diagnostic message will be produced. Otherwise, an
7134 /// extra note will be emitted pointing to location of the format string.
7135 ///
7136 /// \param ArgumentExpr the expression that is passed as the format string
7137 /// argument in the function call. Used for getting locations when two
7138 /// diagnostics are emitted.
7139 ///
7140 /// \param PDiag the callee should already have provided any strings for the
7141 /// diagnostic message. This function only adds locations and fixits
7142 /// to diagnostics.
7143 ///
7144 /// \param Loc primary location for diagnostic. If two diagnostics are
7145 /// required, one will be at Loc and a new SourceLocation will be created for
7146 /// the other one.
7147 ///
7148 /// \param IsStringLocation if true, Loc points to the format string should be
7149 /// used for the note. Otherwise, Loc points to the argument list and will
7150 /// be used with PDiag.
7151 ///
7152 /// \param StringRange some or all of the string to highlight. This is
7153 /// templated so it can accept either a CharSourceRange or a SourceRange.
7154 ///
7155 /// \param FixIt optional fix it hint for the format string.
7156 template <typename Range>
7157 void CheckFormatHandler::EmitFormatDiagnostic(
7158 Sema &S, bool InFunctionCall, const Expr *ArgumentExpr,
7159 const PartialDiagnostic &PDiag, SourceLocation Loc, bool IsStringLocation,
7160 Range StringRange, ArrayRef<FixItHint> FixIt) {
7161 if (InFunctionCall) {
7162 const Sema::SemaDiagnosticBuilder &D = S.Diag(Loc, PDiag);
7163 D << StringRange;
7164 D << FixIt;
7165 } else {
7166 S.Diag(IsStringLocation ? ArgumentExpr->getExprLoc() : Loc, PDiag)
7167 << ArgumentExpr->getSourceRange();
7168
7169 const Sema::SemaDiagnosticBuilder &Note =
7170 S.Diag(IsStringLocation ? Loc : StringRange.getBegin(),
7171 diag::note_format_string_defined);
7172
7173 Note << StringRange;
7174 Note << FixIt;
7175 }
7176 }
7177
7178 //===--- CHECK: Printf format string checking ------------------------------===//
7179
7180 namespace {
7181
7182 class CheckPrintfHandler : public CheckFormatHandler {
7183 public:
7184 CheckPrintfHandler(Sema &s, const FormatStringLiteral *fexpr,
7185 const Expr *origFormatExpr,
7186 const Sema::FormatStringType type, unsigned firstDataArg,
7187 unsigned numDataArgs, bool isObjC, const char *beg,
7188 bool hasVAListArg, ArrayRef<const Expr *> Args,
7189 unsigned formatIdx, bool inFunctionCall,
7190 Sema::VariadicCallType CallType,
7191 llvm::SmallBitVector &CheckedVarArgs,
7192 UncoveredArgHandler &UncoveredArg)
7193 : CheckFormatHandler(s, fexpr, origFormatExpr, type, firstDataArg,
7194 numDataArgs, beg, hasVAListArg, Args, formatIdx,
7195 inFunctionCall, CallType, CheckedVarArgs,
7196 UncoveredArg) {}
7197
7198 bool isObjCContext() const { return FSType == Sema::FST_NSString; }
7199
7200 /// Returns true if '%@' specifiers are allowed in the format string.
7201 bool allowsObjCArg() const {
7202 return FSType == Sema::FST_NSString || FSType == Sema::FST_OSLog ||
7203 FSType == Sema::FST_OSTrace;
7204 }
7205
7206 bool HandleInvalidPrintfConversionSpecifier(
7207 const analyze_printf::PrintfSpecifier &FS,
7208 const char *startSpecifier,
7209 unsigned specifierLen) override;
7210
7211 void handleInvalidMaskType(StringRef MaskType) override;
7212
7213 bool HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier &FS,
7214 const char *startSpecifier,
7215 unsigned specifierLen) override;
7216 bool checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
7217 const char *StartSpecifier,
7218 unsigned SpecifierLen,
7219 const Expr *E);
7220
7221 bool HandleAmount(const analyze_format_string::OptionalAmount &Amt, unsigned k,
7222 const char *startSpecifier, unsigned specifierLen);
7223 void HandleInvalidAmount(const analyze_printf::PrintfSpecifier &FS,
7224 const analyze_printf::OptionalAmount &Amt,
7225 unsigned type,
7226 const char *startSpecifier, unsigned specifierLen);
7227 void HandleFlag(const analyze_printf::PrintfSpecifier &FS,
7228 const analyze_printf::OptionalFlag &flag,
7229 const char *startSpecifier, unsigned specifierLen);
7230 void HandleIgnoredFlag(const analyze_printf::PrintfSpecifier &FS,
7231 const analyze_printf::OptionalFlag &ignoredFlag,
7232 const analyze_printf::OptionalFlag &flag,
7233 const char *startSpecifier, unsigned specifierLen);
7234 bool checkForCStrMembers(const analyze_printf::ArgType &AT,
7235 const Expr *E);
7236
7237 void HandleEmptyObjCModifierFlag(const char *startFlag,
7238 unsigned flagLen) override;
7239
7240 void HandleInvalidObjCModifierFlag(const char *startFlag,
7241 unsigned flagLen) override;
7242
7243 void HandleObjCFlagsWithNonObjCConversion(const char *flagsStart,
7244 const char *flagsEnd,
7245 const char *conversionPosition)
7246 override;
7247 };
7248
7249 } // namespace
7250
7251 bool CheckPrintfHandler::HandleInvalidPrintfConversionSpecifier(
7252 const analyze_printf::PrintfSpecifier &FS,
7253 const char *startSpecifier,
7254 unsigned specifierLen) {
7255 const analyze_printf::PrintfConversionSpecifier &CS =
7256 FS.getConversionSpecifier();
7257
7258 return HandleInvalidConversionSpecifier(FS.getArgIndex(),
7259 getLocationOfByte(CS.getStart()),
7260 startSpecifier, specifierLen,
7261 CS.getStart(), CS.getLength());
7262 }
7263
7264 void CheckPrintfHandler::handleInvalidMaskType(StringRef MaskType) {
7265 S.Diag(getLocationOfByte(MaskType.data()), diag::err_invalid_mask_type_size);
7266 }
7267
7268 bool CheckPrintfHandler::HandleAmount(
7269 const analyze_format_string::OptionalAmount &Amt,
7270 unsigned k, const char *startSpecifier,
7271 unsigned specifierLen) {
7272 if (Amt.hasDataArgument()) {
7273 if (!HasVAListArg) {
7274 unsigned argIndex = Amt.getArgIndex();
7275 if (argIndex >= NumDataArgs) {
7276 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_asterisk_missing_arg)
7277 << k,
7278 getLocationOfByte(Amt.getStart()),
7279 /*IsStringLocation*/true,
7280 getSpecifierRange(startSpecifier, specifierLen));
7281 // Don't do any more checking. We will just emit
7282 // spurious errors.
7283 return false;
7284 }
7285
7286 // Type check the data argument. It should be an 'int'.
7287 // Although not in conformance with C99, we also allow the argument to be
7288 // an 'unsigned int' as that is a reasonably safe case. GCC also
7289 // doesn't emit a warning for that case.
7290 CoveredArgs.set(argIndex);
7291 const Expr *Arg = getDataArg(argIndex);
7292 if (!Arg)
7293 return false;
7294
7295 QualType T = Arg->getType();
7296
7297 const analyze_printf::ArgType &AT = Amt.getArgType(S.Context);
7298 assert(AT.isValid());
7299
7300 if (!AT.matchesType(S.Context, T)) {
7301 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_asterisk_wrong_type)
7302 << k << AT.getRepresentativeTypeName(S.Context)
7303 << T << Arg->getSourceRange(),
7304 getLocationOfByte(Amt.getStart()),
7305 /*IsStringLocation*/true,
7306 getSpecifierRange(startSpecifier, specifierLen));
7307 // Don't do any more checking. We will just emit
7308 // spurious errors.
7309 return false;
7310 }
7311 }
7312 }
7313 return true;
7314 }
7315
7316 void CheckPrintfHandler::HandleInvalidAmount(
7317 const analyze_printf::PrintfSpecifier &FS,
7318 const analyze_printf::OptionalAmount &Amt,
7319 unsigned type,
7320 const char *startSpecifier,
7321 unsigned specifierLen) {
7322 const analyze_printf::PrintfConversionSpecifier &CS =
7323 FS.getConversionSpecifier();
7324
7325 FixItHint fixit =
7326 Amt.getHowSpecified() == analyze_printf::OptionalAmount::Constant
7327 ? FixItHint::CreateRemoval(getSpecifierRange(Amt.getStart(),
7328 Amt.getConstantLength()))
7329 : FixItHint();
7330
7331 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_nonsensical_optional_amount)
7332 << type << CS.toString(),
7333 getLocationOfByte(Amt.getStart()),
7334 /*IsStringLocation*/true,
7335 getSpecifierRange(startSpecifier, specifierLen),
7336 fixit);
7337 }
7338
7339 void CheckPrintfHandler::HandleFlag(const analyze_printf::PrintfSpecifier &FS,
7340 const analyze_printf::OptionalFlag &flag,
7341 const char *startSpecifier,
7342 unsigned specifierLen) {
7343 // Warn about pointless flag with a fixit removal.
7344 const analyze_printf::PrintfConversionSpecifier &CS =
7345 FS.getConversionSpecifier();
7346 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_nonsensical_flag)
7347 << flag.toString() << CS.toString(),
7348 getLocationOfByte(flag.getPosition()),
7349 /*IsStringLocation*/true,
7350 getSpecifierRange(startSpecifier, specifierLen),
7351 FixItHint::CreateRemoval(
7352 getSpecifierRange(flag.getPosition(), 1)));
7353 }
7354
7355 void CheckPrintfHandler::HandleIgnoredFlag(
7356 const analyze_printf::PrintfSpecifier &FS,
7357 const analyze_printf::OptionalFlag &ignoredFlag,
7358 const analyze_printf::OptionalFlag &flag,
7359 const char *startSpecifier,
7360 unsigned specifierLen) {
7361 // Warn about ignored flag with a fixit removal.
7362 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_ignored_flag)
7363 << ignoredFlag.toString() << flag.toString(),
7364 getLocationOfByte(ignoredFlag.getPosition()),
7365 /*IsStringLocation*/true,
7366 getSpecifierRange(startSpecifier, specifierLen),
7367 FixItHint::CreateRemoval(
7368 getSpecifierRange(ignoredFlag.getPosition(), 1)));
7369 }
7370
7371 void CheckPrintfHandler::HandleEmptyObjCModifierFlag(const char *startFlag,
7372 unsigned flagLen) {
7373 // Warn about an empty flag.
7374 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_empty_objc_flag),
7375 getLocationOfByte(startFlag),
7376 /*IsStringLocation*/true,
7377 getSpecifierRange(startFlag, flagLen));
7378 }
7379
7380 void CheckPrintfHandler::HandleInvalidObjCModifierFlag(const char *startFlag,
7381 unsigned flagLen) {
7382 // Warn about an invalid flag.
7383 auto Range = getSpecifierRange(startFlag, flagLen);
7384 StringRef flag(startFlag, flagLen);
7385 EmitFormatDiagnostic(S.PDiag(diag::warn_printf_invalid_objc_flag) << flag,
7386 getLocationOfByte(startFlag),
7387 /*IsStringLocation*/true,
7388 Range, FixItHint::CreateRemoval(Range));
7389 }
7390
7391 void CheckPrintfHandler::HandleObjCFlagsWithNonObjCConversion(
7392 const char *flagsStart, const char *flagsEnd, const char *conversionPosition) {
7393 // Warn about using '[...]' without a '@' conversion.
7394 auto Range = getSpecifierRange(flagsStart, flagsEnd - flagsStart + 1);
7395 auto diag = diag::warn_printf_ObjCflags_without_ObjCConversion;
7396 EmitFormatDiagnostic(S.PDiag(diag) << StringRef(conversionPosition, 1),
7397 getLocationOfByte(conversionPosition),
7398 /*IsStringLocation*/true,
7399 Range, FixItHint::CreateRemoval(Range));
7400 }
7401
7402 // Determines if the specified is a C++ class or struct containing
7403 // a member with the specified name and kind (e.g. a CXXMethodDecl named
7404 // "c_str()").
7405 template<typename MemberKind>
7406 static llvm::SmallPtrSet<MemberKind*, 1>
7407 CXXRecordMembersNamed(StringRef Name, Sema &S, QualType Ty) {
7408 const RecordType *RT = Ty->getAs<RecordType>();
7409 llvm::SmallPtrSet<MemberKind*, 1> Results;
7410
7411 if (!RT)
7412 return Results;
7413 const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
7414 if (!RD || !RD->getDefinition())
7415 return Results;
7416
7417 LookupResult R(S, &S.Context.Idents.get(Name), SourceLocation(),
7418 Sema::LookupMemberName);
7419 R.suppressDiagnostics();
7420
7421 // We just need to include all members of the right kind turned up by the
7422 // filter, at this point.
7423 if (S.LookupQualifiedName(R, RT->getDecl()))
7424 for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) {
7425 NamedDecl *decl = (*I)->getUnderlyingDecl();
7426 if (MemberKind *FK = dyn_cast<MemberKind>(decl))
7427 Results.insert(FK);
7428 }
7429 return Results;
7430 }
7431
7432 /// Check if we could call '.c_str()' on an object.
7433 ///
7434 /// FIXME: This returns the wrong results in some cases (if cv-qualifiers don't
7435 /// allow the call, or if it would be ambiguous).
7436 bool Sema::hasCStrMethod(const Expr *E) {
7437 using MethodSet = llvm::SmallPtrSet<CXXMethodDecl *, 1>;
7438
7439 MethodSet Results =
7440 CXXRecordMembersNamed<CXXMethodDecl>("c_str", *this, E->getType());
7441 for (MethodSet::iterator MI = Results.begin(), ME = Results.end();
7442 MI != ME; ++MI)
7443 if ((*MI)->getMinRequiredArguments() == 0)
7444 return true;
7445 return false;
7446 }
7447
7448 // Check if a (w)string was passed when a (w)char* was needed, and offer a
7449 // better diagnostic if so. AT is assumed to be valid.
7450 // Returns true when a c_str() conversion method is found.
7451 bool CheckPrintfHandler::checkForCStrMembers(
7452 const analyze_printf::ArgType &AT, const Expr *E) {
7453 using MethodSet = llvm::SmallPtrSet<CXXMethodDecl *, 1>;
7454
7455 MethodSet Results =
7456 CXXRecordMembersNamed<CXXMethodDecl>("c_str", S, E->getType());
7457
7458 for (MethodSet::iterator MI = Results.begin(), ME = Results.end();
7459 MI != ME; ++MI) {
7460 const CXXMethodDecl *Method = *MI;
7461 if (Method->getMinRequiredArguments() == 0 &&
7462 AT.matchesType(S.Context, Method->getReturnType())) {
7463 // FIXME: Suggest parens if the expression needs them.
7464 SourceLocation EndLoc = S.getLocForEndOfToken(E->getEndLoc());
7465 S.Diag(E->getBeginLoc(), diag::note_printf_c_str)
7466 << "c_str()" << FixItHint::CreateInsertion(EndLoc, ".c_str()");
7467 return true;
7468 }
7469 }
7470
7471 return false;
7472 }
7473
7474 bool
7475 CheckPrintfHandler::HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier
7476 &FS,
7477 const char *startSpecifier,
7478 unsigned specifierLen) {
7479 using namespace analyze_format_string;
7480 using namespace analyze_printf;
7481
7482 const PrintfConversionSpecifier &CS = FS.getConversionSpecifier();
7483
7484 if (FS.consumesDataArgument()) {
7485 if (atFirstArg) {
7486 atFirstArg = false;
7487 usesPositionalArgs = FS.usesPositionalArg();
7488 }
7489 else if (usesPositionalArgs != FS.usesPositionalArg()) {
7490 HandlePositionalNonpositionalArgs(getLocationOfByte(CS.getStart()),
7491 startSpecifier, specifierLen);
7492 return false;
7493 }
7494 }
7495
7496 // First check if the field width, precision, and conversion specifier
7497 // have matching data arguments.
7498 if (!HandleAmount(FS.getFieldWidth(), /* field width */ 0,
7499 startSpecifier, specifierLen)) {
7500 return false;
7501 }
7502
7503 if (!HandleAmount(FS.getPrecision(), /* precision */ 1,
7504 startSpecifier, specifierLen)) {
7505 return false;
7506 }
7507
7508 if (!CS.consumesDataArgument()) {
7509 // FIXME: Technically specifying a precision or field width here
7510 // makes no sense. Worth issuing a warning at some point.
7511 return true;
7512 }
7513
7514 // Consume the argument.
7515 unsigned argIndex = FS.getArgIndex();
7516 if (argIndex < NumDataArgs) {
7517 // The check to see if the argIndex is valid will come later.
7518 // We set the bit here because we may exit early from this
7519 // function if we encounter some other error.
7520 CoveredArgs.set(argIndex);
7521 }
7522
7523 // FreeBSD kernel extensions.
7524 if (CS.getKind() == ConversionSpecifier::FreeBSDbArg ||
7525 CS.getKind() == ConversionSpecifier::FreeBSDDArg) {
7526 // We need at least two arguments.
7527 if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex + 1))
7528 return false;
7529
7530 // Claim the second argument.
7531 CoveredArgs.set(argIndex + 1);
7532
7533 // Type check the first argument (int for %b, pointer for %D)
7534 const Expr *Ex = getDataArg(argIndex);
7535 const analyze_printf::ArgType &AT =
7536 (CS.getKind() == ConversionSpecifier::FreeBSDbArg) ?
7537 ArgType(S.Context.IntTy) : ArgType::CPointerTy;
7538 if (AT.isValid() && !AT.matchesType(S.Context, Ex->getType()))
7539 EmitFormatDiagnostic(
7540 S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
7541 << AT.getRepresentativeTypeName(S.Context) << Ex->getType()
7542 << false << Ex->getSourceRange(),
7543 Ex->getBeginLoc(), /*IsStringLocation*/ false,
7544 getSpecifierRange(startSpecifier, specifierLen));
7545
7546 // Type check the second argument (char * for both %b and %D)
7547 Ex = getDataArg(argIndex + 1);
7548 const analyze_printf::ArgType &AT2 = ArgType::CStrTy;
7549 if (AT2.isValid() && !AT2.matchesType(S.Context, Ex->getType()))
7550 EmitFormatDiagnostic(
7551 S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
7552 << AT2.getRepresentativeTypeName(S.Context) << Ex->getType()
7553 << false << Ex->getSourceRange(),
7554 Ex->getBeginLoc(), /*IsStringLocation*/ false,
7555 getSpecifierRange(startSpecifier, specifierLen));
7556
7557 return true;
7558 }
7559
7560 // Check for using an Objective-C specific conversion specifier
7561 // in a non-ObjC literal.
7562 if (!allowsObjCArg() && CS.isObjCArg()) {
7563 return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
7564 specifierLen);
7565 }
7566
7567 // %P can only be used with os_log.
7568 if (FSType != Sema::FST_OSLog && CS.getKind() == ConversionSpecifier::PArg) {
7569 return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
7570 specifierLen);
7571 }
7572
7573 // %n is not allowed with os_log.
7574 if (FSType == Sema::FST_OSLog && CS.getKind() == ConversionSpecifier::nArg) {
7575 EmitFormatDiagnostic(S.PDiag(diag::warn_os_log_format_narg),
7576 getLocationOfByte(CS.getStart()),
7577 /*IsStringLocation*/ false,
7578 getSpecifierRange(startSpecifier, specifierLen));
7579
7580 return true;
7581 }
7582
7583 // Only scalars are allowed for os_trace.
7584 if (FSType == Sema::FST_OSTrace &&
7585 (CS.getKind() == ConversionSpecifier::PArg ||
7586 CS.getKind() == ConversionSpecifier::sArg ||
7587 CS.getKind() == ConversionSpecifier::ObjCObjArg)) {
7588 return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
7589 specifierLen);
7590 }
7591
7592 // Check for use of public/private annotation outside of os_log().
7593 if (FSType != Sema::FST_OSLog) {
7594 if (FS.isPublic().isSet()) {
7595 EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_annotation)
7596 << "public",
7597 getLocationOfByte(FS.isPublic().getPosition()),
7598 /*IsStringLocation*/ false,
7599 getSpecifierRange(startSpecifier, specifierLen));
7600 }
7601 if (FS.isPrivate().isSet()) {
7602 EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_annotation)
7603 << "private",
7604 getLocationOfByte(FS.isPrivate().getPosition()),
7605 /*IsStringLocation*/ false,
7606 getSpecifierRange(startSpecifier, specifierLen));
7607 }
7608 }
7609
7610 // Check for invalid use of field width
7611 if (!FS.hasValidFieldWidth()) {
7612 HandleInvalidAmount(FS, FS.getFieldWidth(), /* field width */ 0,
7613 startSpecifier, specifierLen);
7614 }
7615
7616 // Check for invalid use of precision
7617 if (!FS.hasValidPrecision()) {
7618 HandleInvalidAmount(FS, FS.getPrecision(), /* precision */ 1,
7619 startSpecifier, specifierLen);
7620 }
7621
7622 // Precision is mandatory for %P specifier.
7623 if (CS.getKind() == ConversionSpecifier::PArg &&
7624 FS.getPrecision().getHowSpecified() == OptionalAmount::NotSpecified) {
7625 EmitFormatDiagnostic(S.PDiag(diag::warn_format_P_no_precision),
7626 getLocationOfByte(startSpecifier),
7627 /*IsStringLocation*/ false,
7628 getSpecifierRange(startSpecifier, specifierLen));
7629 }
7630
7631 // Check each flag does not conflict with any other component.
7632 if (!FS.hasValidThousandsGroupingPrefix())
7633 HandleFlag(FS, FS.hasThousandsGrouping(), startSpecifier, specifierLen);
7634 if (!FS.hasValidLeadingZeros())
7635 HandleFlag(FS, FS.hasLeadingZeros(), startSpecifier, specifierLen);
7636 if (!FS.hasValidPlusPrefix())
7637 HandleFlag(FS, FS.hasPlusPrefix(), startSpecifier, specifierLen);
7638 if (!FS.hasValidSpacePrefix())
7639 HandleFlag(FS, FS.hasSpacePrefix(), startSpecifier, specifierLen);
7640 if (!FS.hasValidAlternativeForm())
7641 HandleFlag(FS, FS.hasAlternativeForm(), startSpecifier, specifierLen);
7642 if (!FS.hasValidLeftJustified())
7643 HandleFlag(FS, FS.isLeftJustified(), startSpecifier, specifierLen);
7644
7645 // Check that flags are not ignored by another flag
7646 if (FS.hasSpacePrefix() && FS.hasPlusPrefix()) // ' ' ignored by '+'
7647 HandleIgnoredFlag(FS, FS.hasSpacePrefix(), FS.hasPlusPrefix(),
7648 startSpecifier, specifierLen);
7649 if (FS.hasLeadingZeros() && FS.isLeftJustified()) // '0' ignored by '-'
7650 HandleIgnoredFlag(FS, FS.hasLeadingZeros(), FS.isLeftJustified(),
7651 startSpecifier, specifierLen);
7652
7653 // Check the length modifier is valid with the given conversion specifier.
7654 if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo()))
7655 HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
7656 diag::warn_format_nonsensical_length);
7657 else if (!FS.hasStandardLengthModifier())
7658 HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
7659 else if (!FS.hasStandardLengthConversionCombination())
7660 HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
7661 diag::warn_format_non_standard_conversion_spec);
7662
7663 if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
7664 HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
7665
7666 // The remaining checks depend on the data arguments.
7667 if (HasVAListArg)
7668 return true;
7669
7670 if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex))
7671 return false;
7672
7673 const Expr *Arg = getDataArg(argIndex);
7674 if (!Arg)
7675 return true;
7676
7677 return checkFormatExpr(FS, startSpecifier, specifierLen, Arg);
7678 }
7679
7680 static bool requiresParensToAddCast(const Expr *E) {
7681 // FIXME: We should have a general way to reason about operator
7682 // precedence and whether parens are actually needed here.
7683 // Take care of a few common cases where they aren't.
7684 const Expr *Inside = E->IgnoreImpCasts();
7685 if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(Inside))
7686 Inside = POE->getSyntacticForm()->IgnoreImpCasts();
7687
7688 switch (Inside->getStmtClass()) {
7689 case Stmt::ArraySubscriptExprClass:
7690 case Stmt::CallExprClass:
7691 case Stmt::CharacterLiteralClass:
7692 case Stmt::CXXBoolLiteralExprClass:
7693 case Stmt::DeclRefExprClass:
7694 case Stmt::FloatingLiteralClass:
7695 case Stmt::IntegerLiteralClass:
7696 case Stmt::MemberExprClass:
7697 case Stmt::ObjCArrayLiteralClass:
7698 case Stmt::ObjCBoolLiteralExprClass:
7699 case Stmt::ObjCBoxedExprClass:
7700 case Stmt::ObjCDictionaryLiteralClass:
7701 case Stmt::ObjCEncodeExprClass:
7702 case Stmt::ObjCIvarRefExprClass:
7703 case Stmt::ObjCMessageExprClass:
7704 case Stmt::ObjCPropertyRefExprClass:
7705 case Stmt::ObjCStringLiteralClass:
7706 case Stmt::ObjCSubscriptRefExprClass:
7707 case Stmt::ParenExprClass:
7708 case Stmt::StringLiteralClass:
7709 case Stmt::UnaryOperatorClass:
7710 return false;
7711 default:
7712 return true;
7713 }
7714 }
7715
7716 static std::pair<QualType, StringRef>
7717 shouldNotPrintDirectly(const ASTContext &Context,
7718 QualType IntendedTy,
7719 const Expr *E) {
7720 // Use a 'while' to peel off layers of typedefs.
7721 QualType TyTy = IntendedTy;
7722 while (const TypedefType *UserTy = TyTy->getAs<TypedefType>()) {
7723 StringRef Name = UserTy->getDecl()->getName();
7724 QualType CastTy = llvm::StringSwitch<QualType>(Name)
7725 .Case("CFIndex", Context.getNSIntegerType())
7726 .Case("NSInteger", Context.getNSIntegerType())
7727 .Case("NSUInteger", Context.getNSUIntegerType())
7728 .Case("SInt32", Context.IntTy)
7729 .Case("UInt32", Context.UnsignedIntTy)
7730 .Default(QualType());
7731
7732 if (!CastTy.isNull())
7733 return std::make_pair(CastTy, Name);
7734
7735 TyTy = UserTy->desugar();
7736 }
7737
7738 // Strip parens if necessary.
7739 if (const ParenExpr *PE = dyn_cast<ParenExpr>(E))
7740 return shouldNotPrintDirectly(Context,
7741 PE->getSubExpr()->getType(),
7742 PE->getSubExpr());
7743
7744 // If this is a conditional expression, then its result type is constructed
7745 // via usual arithmetic conversions and thus there might be no necessary
7746 // typedef sugar there. Recurse to operands to check for NSInteger &
7747 // Co. usage condition.
7748 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
7749 QualType TrueTy, FalseTy;
7750 StringRef TrueName, FalseName;
7751
7752 std::tie(TrueTy, TrueName) =
7753 shouldNotPrintDirectly(Context,
7754 CO->getTrueExpr()->getType(),
7755 CO->getTrueExpr());
7756 std::tie(FalseTy, FalseName) =
7757 shouldNotPrintDirectly(Context,
7758 CO->getFalseExpr()->getType(),
7759 CO->getFalseExpr());
7760
7761 if (TrueTy == FalseTy)
7762 return std::make_pair(TrueTy, TrueName);
7763 else if (TrueTy.isNull())
7764 return std::make_pair(FalseTy, FalseName);
7765 else if (FalseTy.isNull())
7766 return std::make_pair(TrueTy, TrueName);
7767 }
7768
7769 return std::make_pair(QualType(), StringRef());
7770 }
7771
7772 /// Return true if \p ICE is an implicit argument promotion of an arithmetic
7773 /// type. Bit-field 'promotions' from a higher ranked type to a lower ranked
7774 /// type do not count.
7775 static bool
7776 isArithmeticArgumentPromotion(Sema &S, const ImplicitCastExpr *ICE) {
7777 QualType From = ICE->getSubExpr()->getType();
7778 QualType To = ICE->getType();
7779 // It's an integer promotion if the destination type is the promoted
7780 // source type.
7781 if (ICE->getCastKind() == CK_IntegralCast &&
7782 From->isPromotableIntegerType() &&
7783 S.Context.getPromotedIntegerType(From) == To)
7784 return true;
7785 // Look through vector types, since we do default argument promotion for
7786 // those in OpenCL.
7787 if (const auto *VecTy = From->getAs<ExtVectorType>())
7788 From = VecTy->getElementType();
7789 if (const auto *VecTy = To->getAs<ExtVectorType>())
7790 To = VecTy->getElementType();
7791 // It's a floating promotion if the source type is a lower rank.
7792 return ICE->getCastKind() == CK_FloatingCast &&
7793 S.Context.getFloatingTypeOrder(From, To) < 0;
7794 }
7795
7796 bool
7797 CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
7798 const char *StartSpecifier,
7799 unsigned SpecifierLen,
7800 const Expr *E) {
7801 using namespace analyze_format_string;
7802 using namespace analyze_printf;
7803
7804 // Now type check the data expression that matches the
7805 // format specifier.
7806 const analyze_printf::ArgType &AT = FS.getArgType(S.Context, isObjCContext());
7807 if (!AT.isValid())
7808 return true;
7809
7810 QualType ExprTy = E->getType();
7811 while (const TypeOfExprType *TET = dyn_cast<TypeOfExprType>(ExprTy)) {
7812 ExprTy = TET->getUnderlyingExpr()->getType();
7813 }
7814
7815 const analyze_printf::ArgType::MatchKind Match =
7816 AT.matchesType(S.Context, ExprTy);
7817 bool Pedantic = Match == analyze_printf::ArgType::NoMatchPedantic;
7818 if (Match == analyze_printf::ArgType::Match)
7819 return true;
7820
7821 // Look through argument promotions for our error message's reported type.
7822 // This includes the integral and floating promotions, but excludes array
7823 // and function pointer decay (seeing that an argument intended to be a
7824 // string has type 'char [6]' is probably more confusing than 'char *') and
7825 // certain bitfield promotions (bitfields can be 'demoted' to a lesser type).
7826 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
7827 if (isArithmeticArgumentPromotion(S, ICE)) {
7828 E = ICE->getSubExpr();
7829 ExprTy = E->getType();
7830
7831 // Check if we didn't match because of an implicit cast from a 'char'
7832 // or 'short' to an 'int'. This is done because printf is a varargs
7833 // function.
7834 if (ICE->getType() == S.Context.IntTy ||
7835 ICE->getType() == S.Context.UnsignedIntTy) {
7836 // All further checking is done on the subexpression.
7837 if (AT.matchesType(S.Context, ExprTy))
7838 return true;
7839 }
7840 }
7841 } else if (const CharacterLiteral *CL = dyn_cast<CharacterLiteral>(E)) {
7842 // Special case for 'a', which has type 'int' in C.
7843 // Note, however, that we do /not/ want to treat multibyte constants like
7844 // 'MooV' as characters! This form is deprecated but still exists.
7845 if (ExprTy == S.Context.IntTy)
7846 if (llvm::isUIntN(S.Context.getCharWidth(), CL->getValue()))
7847 ExprTy = S.Context.CharTy;
7848 }
7849
7850 // Look through enums to their underlying type.
7851 bool IsEnum = false;
7852 if (auto EnumTy = ExprTy->getAs<EnumType>()) {
7853 ExprTy = EnumTy->getDecl()->getIntegerType();
7854 IsEnum = true;
7855 }
7856
7857 // %C in an Objective-C context prints a unichar, not a wchar_t.
7858 // If the argument is an integer of some kind, believe the %C and suggest
7859 // a cast instead of changing the conversion specifier.
7860 QualType IntendedTy = ExprTy;
7861 if (isObjCContext() &&
7862 FS.getConversionSpecifier().getKind() == ConversionSpecifier::CArg) {
7863 if (ExprTy->isIntegralOrUnscopedEnumerationType() &&
7864 !ExprTy->isCharType()) {
7865 // 'unichar' is defined as a typedef of unsigned short, but we should
7866 // prefer using the typedef if it is visible.
7867 IntendedTy = S.Context.UnsignedShortTy;
7868
7869 // While we are here, check if the value is an IntegerLiteral that happens
7870 // to be within the valid range.
7871 if (const IntegerLiteral *IL = dyn_cast<IntegerLiteral>(E)) {
7872 const llvm::APInt &V = IL->getValue();
7873 if (V.getActiveBits() <= S.Context.getTypeSize(IntendedTy))
7874 return true;
7875 }
7876
7877 LookupResult Result(S, &S.Context.Idents.get("unichar"), E->getBeginLoc(),
7878 Sema::LookupOrdinaryName);
7879 if (S.LookupName(Result, S.getCurScope())) {
7880 NamedDecl *ND = Result.getFoundDecl();
7881 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(ND))
7882 if (TD->getUnderlyingType() == IntendedTy)
7883 IntendedTy = S.Context.getTypedefType(TD);
7884 }
7885 }
7886 }
7887
7888 // Special-case some of Darwin's platform-independence types by suggesting
7889 // casts to primitive types that are known to be large enough.
7890 bool ShouldNotPrintDirectly = false; StringRef CastTyName;
7891 if (S.Context.getTargetInfo().getTriple().isOSDarwin()) {
7892 QualType CastTy;
7893 std::tie(CastTy, CastTyName) = shouldNotPrintDirectly(S.Context, IntendedTy, E);
7894 if (!CastTy.isNull()) {
7895 // %zi/%zu and %td/%tu are OK to use for NSInteger/NSUInteger of type int
7896 // (long in ASTContext). Only complain to pedants.
7897 if ((CastTyName == "NSInteger" || CastTyName == "NSUInteger") &&
7898 (AT.isSizeT() || AT.isPtrdiffT()) &&
7899 AT.matchesType(S.Context, CastTy))
7900 Pedantic = true;
7901 IntendedTy = CastTy;
7902 ShouldNotPrintDirectly = true;
7903 }
7904 }
7905
7906 // We may be able to offer a FixItHint if it is a supported type.
7907 PrintfSpecifier fixedFS = FS;
7908 bool Success =
7909 fixedFS.fixType(IntendedTy, S.getLangOpts(), S.Context, isObjCContext());
7910
7911 if (Success) {
7912 // Get the fix string from the fixed format specifier
7913 SmallString<16> buf;
7914 llvm::raw_svector_ostream os(buf);
7915 fixedFS.toString(os);
7916
7917 CharSourceRange SpecRange = getSpecifierRange(StartSpecifier, SpecifierLen);
7918
7919 if (IntendedTy == ExprTy && !ShouldNotPrintDirectly) {
7920 unsigned Diag =
7921 Pedantic
7922 ? diag::warn_format_conversion_argument_type_mismatch_pedantic
7923 : diag::warn_format_conversion_argument_type_mismatch;
7924 // In this case, the specifier is wrong and should be changed to match
7925 // the argument.
7926 EmitFormatDiagnostic(S.PDiag(Diag)
7927 << AT.getRepresentativeTypeName(S.Context)
7928 << IntendedTy << IsEnum << E->getSourceRange(),
7929 E->getBeginLoc(),
7930 /*IsStringLocation*/ false, SpecRange,
7931 FixItHint::CreateReplacement(SpecRange, os.str()));
7932 } else {
7933 // The canonical type for formatting this value is different from the
7934 // actual type of the expression. (This occurs, for example, with Darwin's
7935 // NSInteger on 32-bit platforms, where it is typedef'd as 'int', but
7936 // should be printed as 'long' for 64-bit compatibility.)
7937 // Rather than emitting a normal format/argument mismatch, we want to
7938 // add a cast to the recommended type (and correct the format string
7939 // if necessary).
7940 SmallString<16> CastBuf;
7941 llvm::raw_svector_ostream CastFix(CastBuf);
7942 CastFix << "(";
7943 IntendedTy.print(CastFix, S.Context.getPrintingPolicy());
7944 CastFix << ")";
7945
7946 SmallVector<FixItHint,4> Hints;
7947 if (!AT.matchesType(S.Context, IntendedTy) || ShouldNotPrintDirectly)
7948 Hints.push_back(FixItHint::CreateReplacement(SpecRange, os.str()));
7949
7950 if (const CStyleCastExpr *CCast = dyn_cast<CStyleCastExpr>(E)) {
7951 // If there's already a cast present, just replace it.
7952 SourceRange CastRange(CCast->getLParenLoc(), CCast->getRParenLoc());
7953 Hints.push_back(FixItHint::CreateReplacement(CastRange, CastFix.str()));
7954
7955 } else if (!requiresParensToAddCast(E)) {
7956 // If the expression has high enough precedence,
7957 // just write the C-style cast.
7958 Hints.push_back(
7959 FixItHint::CreateInsertion(E->getBeginLoc(), CastFix.str()));
7960 } else {
7961 // Otherwise, add parens around the expression as well as the cast.
7962 CastFix << "(";
7963 Hints.push_back(
7964 FixItHint::CreateInsertion(E->getBeginLoc(), CastFix.str()));
7965
7966 SourceLocation After = S.getLocForEndOfToken(E->getEndLoc());
7967 Hints.push_back(FixItHint::CreateInsertion(After, ")"));
7968 }
7969
7970 if (ShouldNotPrintDirectly) {
7971 // The expression has a type that should not be printed directly.
7972 // We extract the name from the typedef because we don't want to show
7973 // the underlying type in the diagnostic.
7974 StringRef Name;
7975 if (const TypedefType *TypedefTy = dyn_cast<TypedefType>(ExprTy))
7976 Name = TypedefTy->getDecl()->getName();
7977 else
7978 Name = CastTyName;
7979 unsigned Diag = Pedantic
7980 ? diag::warn_format_argument_needs_cast_pedantic
7981 : diag::warn_format_argument_needs_cast;
7982 EmitFormatDiagnostic(S.PDiag(Diag) << Name << IntendedTy << IsEnum
7983 << E->getSourceRange(),
7984 E->getBeginLoc(), /*IsStringLocation=*/false,
7985 SpecRange, Hints);
7986 } else {
7987 // In this case, the expression could be printed using a different
7988 // specifier, but we've decided that the specifier is probably correct
7989 // and we should cast instead. Just use the normal warning message.
7990 EmitFormatDiagnostic(
7991 S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
7992 << AT.getRepresentativeTypeName(S.Context) << ExprTy << IsEnum
7993 << E->getSourceRange(),
7994 E->getBeginLoc(), /*IsStringLocation*/ false, SpecRange, Hints);
7995 }
7996 }
7997 } else {
7998 const CharSourceRange &CSR = getSpecifierRange(StartSpecifier,
7999 SpecifierLen);
8000 // Since the warning for passing non-POD types to variadic functions
8001 // was deferred until now, we emit a warning for non-POD
8002 // arguments here.
8003 switch (S.isValidVarArgType(ExprTy)) {
8004 case Sema::VAK_Valid:
8005 case Sema::VAK_ValidInCXX11: {
8006 unsigned Diag =
8007 Pedantic
8008 ? diag::warn_format_conversion_argument_type_mismatch_pedantic
8009 : diag::warn_format_conversion_argument_type_mismatch;
8010
8011 EmitFormatDiagnostic(
8012 S.PDiag(Diag) << AT.getRepresentativeTypeName(S.Context) << ExprTy
8013 << IsEnum << CSR << E->getSourceRange(),
8014 E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
8015 break;
8016 }
8017 case Sema::VAK_Undefined:
8018 case Sema::VAK_MSVCUndefined:
8019 EmitFormatDiagnostic(S.PDiag(diag::warn_non_pod_vararg_with_format_string)
8020 << S.getLangOpts().CPlusPlus11 << ExprTy
8021 << CallType
8022 << AT.getRepresentativeTypeName(S.Context) << CSR
8023 << E->getSourceRange(),
8024 E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
8025 checkForCStrMembers(AT, E);
8026 break;
8027
8028 case Sema::VAK_Invalid:
8029 if (ExprTy->isObjCObjectType())
8030 EmitFormatDiagnostic(
8031 S.PDiag(diag::err_cannot_pass_objc_interface_to_vararg_format)
8032 << S.getLangOpts().CPlusPlus11 << ExprTy << CallType
8033 << AT.getRepresentativeTypeName(S.Context) << CSR
8034 << E->getSourceRange(),
8035 E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
8036 else
8037 // FIXME: If this is an initializer list, suggest removing the braces
8038 // or inserting a cast to the target type.
8039 S.Diag(E->getBeginLoc(), diag::err_cannot_pass_to_vararg_format)
8040 << isa<InitListExpr>(E) << ExprTy << CallType
8041 << AT.getRepresentativeTypeName(S.Context) << E->getSourceRange();
8042 break;
8043 }
8044
8045 assert(FirstDataArg + FS.getArgIndex() < CheckedVarArgs.size() &&
8046 "format string specifier index out of range");
8047 CheckedVarArgs[FirstDataArg + FS.getArgIndex()] = true;
8048 }
8049
8050 return true;
8051 }
8052
8053 //===--- CHECK: Scanf format string checking ------------------------------===//
8054
8055 namespace {
8056
8057 class CheckScanfHandler : public CheckFormatHandler {
8058 public:
8059 CheckScanfHandler(Sema &s, const FormatStringLiteral *fexpr,
8060 const Expr *origFormatExpr, Sema::FormatStringType type,
8061 unsigned firstDataArg, unsigned numDataArgs,
8062 const char *beg, bool hasVAListArg,
8063 ArrayRef<const Expr *> Args, unsigned formatIdx,
8064 bool inFunctionCall, Sema::VariadicCallType CallType,
8065 llvm::SmallBitVector &CheckedVarArgs,
8066 UncoveredArgHandler &UncoveredArg)
8067 : CheckFormatHandler(s, fexpr, origFormatExpr, type, firstDataArg,
8068 numDataArgs, beg, hasVAListArg, Args, formatIdx,
8069 inFunctionCall, CallType, CheckedVarArgs,
8070 UncoveredArg) {}
8071
8072 bool HandleScanfSpecifier(const analyze_scanf::ScanfSpecifier &FS,
8073 const char *startSpecifier,
8074 unsigned specifierLen) override;
8075
8076 bool HandleInvalidScanfConversionSpecifier(
8077 const analyze_scanf::ScanfSpecifier &FS,
8078 const char *startSpecifier,
8079 unsigned specifierLen) override;
8080
8081 void HandleIncompleteScanList(const char *start, const char *end) override;
8082 };
8083
8084 } // namespace
8085
8086 void CheckScanfHandler::HandleIncompleteScanList(const char *start,
8087 const char *end) {
8088 EmitFormatDiagnostic(S.PDiag(diag::warn_scanf_scanlist_incomplete),
8089 getLocationOfByte(end), /*IsStringLocation*/true,
8090 getSpecifierRange(start, end - start));
8091 }
8092
8093 bool CheckScanfHandler::HandleInvalidScanfConversionSpecifier(
8094 const analyze_scanf::ScanfSpecifier &FS,
8095 const char *startSpecifier,
8096 unsigned specifierLen) {
8097 const analyze_scanf::ScanfConversionSpecifier &CS =
8098 FS.getConversionSpecifier();
8099
8100 return HandleInvalidConversionSpecifier(FS.getArgIndex(),
8101 getLocationOfByte(CS.getStart()),
8102 startSpecifier, specifierLen,
8103 CS.getStart(), CS.getLength());
8104 }
8105
8106 bool CheckScanfHandler::HandleScanfSpecifier(
8107 const analyze_scanf::ScanfSpecifier &FS,
8108 const char *startSpecifier,
8109 unsigned specifierLen) {
8110 using namespace analyze_scanf;
8111 using namespace analyze_format_string;
8112
8113 const ScanfConversionSpecifier &CS = FS.getConversionSpecifier();
8114
8115 // Handle case where '%' and '*' don't consume an argument. These shouldn't
8116 // be used to decide if we are using positional arguments consistently.
8117 if (FS.consumesDataArgument()) {
8118 if (atFirstArg) {
8119 atFirstArg = false;
8120 usesPositionalArgs = FS.usesPositionalArg();
8121 }
8122 else if (usesPositionalArgs != FS.usesPositionalArg()) {
8123 HandlePositionalNonpositionalArgs(getLocationOfByte(CS.getStart()),
8124 startSpecifier, specifierLen);
8125 return false;
8126 }
8127 }
8128
8129 // Check if the field with is non-zero.
8130 const OptionalAmount &Amt = FS.getFieldWidth();
8131 if (Amt.getHowSpecified() == OptionalAmount::Constant) {
8132 if (Amt.getConstantAmount() == 0) {
8133 const CharSourceRange &R = getSpecifierRange(Amt.getStart(),
8134 Amt.getConstantLength());
8135 EmitFormatDiagnostic(S.PDiag(diag::warn_scanf_nonzero_width),
8136 getLocationOfByte(Amt.getStart()),
8137 /*IsStringLocation*/true, R,
8138 FixItHint::CreateRemoval(R));
8139 }
8140 }
8141
8142 if (!FS.consumesDataArgument()) {
8143 // FIXME: Technically specifying a precision or field width here
8144 // makes no sense. Worth issuing a warning at some point.
8145 return true;
8146 }
8147
8148 // Consume the argument.
8149 unsigned argIndex = FS.getArgIndex();
8150 if (argIndex < NumDataArgs) {
8151 // The check to see if the argIndex is valid will come later.
8152 // We set the bit here because we may exit early from this
8153 // function if we encounter some other error.
8154 CoveredArgs.set(argIndex);
8155 }
8156
8157 // Check the length modifier is valid with the given conversion specifier.
8158 if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo()))
8159 HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
8160 diag::warn_format_nonsensical_length);
8161 else if (!FS.hasStandardLengthModifier())
8162 HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
8163 else if (!FS.hasStandardLengthConversionCombination())
8164 HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
8165 diag::warn_format_non_standard_conversion_spec);
8166
8167 if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
8168 HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
8169
8170 // The remaining checks depend on the data arguments.
8171 if (HasVAListArg)
8172 return true;
8173
8174 if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex))
8175 return false;
8176
8177 // Check that the argument type matches the format specifier.
8178 const Expr *Ex = getDataArg(argIndex);
8179 if (!Ex)
8180 return true;
8181
8182 const analyze_format_string::ArgType &AT = FS.getArgType(S.Context);
8183
8184 if (!AT.isValid()) {
8185 return true;
8186 }
8187
8188 analyze_format_string::ArgType::MatchKind Match =
8189 AT.matchesType(S.Context, Ex->getType());
8190 bool Pedantic = Match == analyze_format_string::ArgType::NoMatchPedantic;
8191 if (Match == analyze_format_string::ArgType::Match)
8192 return true;
8193
8194 ScanfSpecifier fixedFS = FS;
8195 bool Success = fixedFS.fixType(Ex->getType(), Ex->IgnoreImpCasts()->getType(),
8196 S.getLangOpts(), S.Context);
8197
8198 unsigned Diag =
8199 Pedantic ? diag::warn_format_conversion_argument_type_mismatch_pedantic
8200 : diag::warn_format_conversion_argument_type_mismatch;
8201
8202 if (Success) {
8203 // Get the fix string from the fixed format specifier.
8204 SmallString<128> buf;
8205 llvm::raw_svector_ostream os(buf);
8206 fixedFS.toString(os);
8207
8208 EmitFormatDiagnostic(
8209 S.PDiag(Diag) << AT.getRepresentativeTypeName(S.Context)
8210 << Ex->getType() << false << Ex->getSourceRange(),
8211 Ex->getBeginLoc(),
8212 /*IsStringLocation*/ false,
8213 getSpecifierRange(startSpecifier, specifierLen),
8214 FixItHint::CreateReplacement(
8215 getSpecifierRange(startSpecifier, specifierLen), os.str()));
8216 } else {
8217 EmitFormatDiagnostic(S.PDiag(Diag)
8218 << AT.getRepresentativeTypeName(S.Context)
8219 << Ex->getType() << false << Ex->getSourceRange(),
8220 Ex->getBeginLoc(),
8221 /*IsStringLocation*/ false,
8222 getSpecifierRange(startSpecifier, specifierLen));
8223 }
8224
8225 return true;
8226 }
8227
8228 static void CheckFormatString(Sema &S, const FormatStringLiteral *FExpr,
8229 const Expr *OrigFormatExpr,
8230 ArrayRef<const Expr *> Args,
8231 bool HasVAListArg, unsigned format_idx,
8232 unsigned firstDataArg,
8233 Sema::FormatStringType Type,
8234 bool inFunctionCall,
8235 Sema::VariadicCallType CallType,
8236 llvm::SmallBitVector &CheckedVarArgs,
8237 UncoveredArgHandler &UncoveredArg) {
8238 // CHECK: is the format string a wide literal?
8239 if (!FExpr->isAscii() && !FExpr->isUTF8()) {
8240 CheckFormatHandler::EmitFormatDiagnostic(
8241 S, inFunctionCall, Args[format_idx],
8242 S.PDiag(diag::warn_format_string_is_wide_literal), FExpr->getBeginLoc(),
8243 /*IsStringLocation*/ true, OrigFormatExpr->getSourceRange());
8244 return;
8245 }
8246
8247 // Str - The format string. NOTE: this is NOT null-terminated!
8248 StringRef StrRef = FExpr->getString();
8249 const char *Str = StrRef.data();
8250 // Account for cases where the string literal is truncated in a declaration.
8251 const ConstantArrayType *T =
8252 S.Context.getAsConstantArrayType(FExpr->getType());
8253 assert(T && "String literal not of constant array type!");
8254 size_t TypeSize = T->getSize().getZExtValue();
8255 size_t StrLen = std::min(std::max(TypeSize, size_t(1)) - 1, StrRef.size());
8256 const unsigned numDataArgs = Args.size() - firstDataArg;
8257
8258 // Emit a warning if the string literal is truncated and does not contain an
8259 // embedded null character.
8260 if (TypeSize <= StrRef.size() &&
8261 StrRef.substr(0, TypeSize).find('\0') == StringRef::npos) {
8262 CheckFormatHandler::EmitFormatDiagnostic(
8263 S, inFunctionCall, Args[format_idx],
8264 S.PDiag(diag::warn_printf_format_string_not_null_terminated),
8265 FExpr->getBeginLoc(),
8266 /*IsStringLocation=*/true, OrigFormatExpr->getSourceRange());
8267 return;
8268 }
8269
8270 // CHECK: empty format string?
8271 if (StrLen == 0 && numDataArgs > 0) {
8272 CheckFormatHandler::EmitFormatDiagnostic(
8273 S, inFunctionCall, Args[format_idx],
8274 S.PDiag(diag::warn_empty_format_string), FExpr->getBeginLoc(),
8275 /*IsStringLocation*/ true, OrigFormatExpr->getSourceRange());
8276 return;
8277 }
8278
8279 if (Type == Sema::FST_Printf || Type == Sema::FST_NSString ||
8280 Type == Sema::FST_FreeBSDKPrintf || Type == Sema::FST_OSLog ||
8281 Type == Sema::FST_OSTrace) {
8282 CheckPrintfHandler H(
8283 S, FExpr, OrigFormatExpr, Type, firstDataArg, numDataArgs,
8284 (Type == Sema::FST_NSString || Type == Sema::FST_OSTrace), Str,
8285 HasVAListArg, Args, format_idx, inFunctionCall, CallType,
8286 CheckedVarArgs, UncoveredArg);
8287
8288 if (!analyze_format_string::ParsePrintfString(H, Str, Str + StrLen,
8289 S.getLangOpts(),
8290 S.Context.getTargetInfo(),
8291 Type == Sema::FST_FreeBSDKPrintf))
8292 H.DoneProcessing();
8293 } else if (Type == Sema::FST_Scanf) {
8294 CheckScanfHandler H(S, FExpr, OrigFormatExpr, Type, firstDataArg,
8295 numDataArgs, Str, HasVAListArg, Args, format_idx,
8296 inFunctionCall, CallType, CheckedVarArgs, UncoveredArg);
8297
8298 if (!analyze_format_string::ParseScanfString(H, Str, Str + StrLen,
8299 S.getLangOpts(),
8300 S.Context.getTargetInfo()))
8301 H.DoneProcessing();
8302 } // TODO: handle other formats
8303 }
8304
8305 bool Sema::FormatStringHasSArg(const StringLiteral *FExpr) {
8306 // Str - The format string. NOTE: this is NOT null-terminated!
8307 StringRef StrRef = FExpr->getString();
8308 const char *Str = StrRef.data();
8309 // Account for cases where the string literal is truncated in a declaration.
8310 const ConstantArrayType *T = Context.getAsConstantArrayType(FExpr->getType());
8311 assert(T && "String literal not of constant array type!");
8312 size_t TypeSize = T->getSize().getZExtValue();
8313 size_t StrLen = std::min(std::max(TypeSize, size_t(1)) - 1, StrRef.size());
8314 return analyze_format_string::ParseFormatStringHasSArg(Str, Str + StrLen,
8315 getLangOpts(),
8316 Context.getTargetInfo());
8317 }
8318
8319 //===--- CHECK: Warn on use of wrong absolute value function. -------------===//
8320
8321 // Returns the related absolute value function that is larger, of 0 if one
8322 // does not exist.
8323 static unsigned getLargerAbsoluteValueFunction(unsigned AbsFunction) {
8324 switch (AbsFunction) {
8325 default:
8326 return 0;
8327
8328 case Builtin::BI__builtin_abs:
8329 return Builtin::BI__builtin_labs;
8330 case Builtin::BI__builtin_labs:
8331 return Builtin::BI__builtin_llabs;
8332 case Builtin::BI__builtin_llabs:
8333 return 0;
8334
8335 case Builtin::BI__builtin_fabsf:
8336 return Builtin::BI__builtin_fabs;
8337 case Builtin::BI__builtin_fabs:
8338 return Builtin::BI__builtin_fabsl;
8339 case Builtin::BI__builtin_fabsl:
8340 return 0;
8341
8342 case Builtin::BI__builtin_cabsf:
8343 return Builtin::BI__builtin_cabs;
8344 case Builtin::BI__builtin_cabs:
8345 return Builtin::BI__builtin_cabsl;
8346 case Builtin::BI__builtin_cabsl:
8347 return 0;
8348
8349 case Builtin::BIabs:
8350 return Builtin::BIlabs;
8351 case Builtin::BIlabs:
8352 return Builtin::BIllabs;
8353 case Builtin::BIllabs:
8354 return 0;
8355
8356 case Builtin::BIfabsf:
8357 return Builtin::BIfabs;
8358 case Builtin::BIfabs:
8359 return Builtin::BIfabsl;
8360 case Builtin::BIfabsl:
8361 return 0;
8362
8363 case Builtin::BIcabsf:
8364 return Builtin::BIcabs;
8365 case Builtin::BIcabs:
8366 return Builtin::BIcabsl;
8367 case Builtin::BIcabsl:
8368 return 0;
8369 }
8370 }
8371
8372 // Returns the argument type of the absolute value function.
8373 static QualType getAbsoluteValueArgumentType(ASTContext &Context,
8374 unsigned AbsType) {
8375 if (AbsType == 0)
8376 return QualType();
8377
8378 ASTContext::GetBuiltinTypeError Error = ASTContext::GE_None;
8379 QualType BuiltinType = Context.GetBuiltinType(AbsType, Error);
8380 if (Error != ASTContext::GE_None)
8381 return QualType();
8382
8383 const FunctionProtoType *FT = BuiltinType->getAs<FunctionProtoType>();
8384 if (!FT)
8385 return QualType();
8386
8387 if (FT->getNumParams() != 1)
8388 return QualType();
8389
8390 return FT->getParamType(0);
8391 }
8392
8393 // Returns the best absolute value function, or zero, based on type and
8394 // current absolute value function.
8395 static unsigned getBestAbsFunction(ASTContext &Context, QualType ArgType,
8396 unsigned AbsFunctionKind) {
8397 unsigned BestKind = 0;
8398 uint64_t ArgSize = Context.getTypeSize(ArgType);
8399 for (unsigned Kind = AbsFunctionKind; Kind != 0;
8400 Kind = getLargerAbsoluteValueFunction(Kind)) {
8401 QualType ParamType = getAbsoluteValueArgumentType(Context, Kind);
8402 if (Context.getTypeSize(ParamType) >= ArgSize) {
8403 if (BestKind == 0)
8404 BestKind = Kind;
8405 else if (Context.hasSameType(ParamType, ArgType)) {
8406 BestKind = Kind;
8407 break;
8408 }
8409 }
8410 }
8411 return BestKind;
8412 }
8413
8414 enum AbsoluteValueKind {
8415 AVK_Integer,
8416 AVK_Floating,
8417 AVK_Complex
8418 };
8419
8420 static AbsoluteValueKind getAbsoluteValueKind(QualType T) {
8421 if (T->isIntegralOrEnumerationType())
8422 return AVK_Integer;
8423 if (T->isRealFloatingType())
8424 return AVK_Floating;
8425 if (T->isAnyComplexType())
8426 return AVK_Complex;
8427
8428 llvm_unreachable("Type not integer, floating, or complex");
8429 }
8430
8431 // Changes the absolute value function to a different type. Preserves whether
8432 // the function is a builtin.
8433 static unsigned changeAbsFunction(unsigned AbsKind,
8434 AbsoluteValueKind ValueKind) {
8435 switch (ValueKind) {
8436 case AVK_Integer:
8437 switch (AbsKind) {
8438 default:
8439 return 0;
8440 case Builtin::BI__builtin_fabsf:
8441 case Builtin::BI__builtin_fabs:
8442 case Builtin::BI__builtin_fabsl:
8443 case Builtin::BI__builtin_cabsf:
8444 case Builtin::BI__builtin_cabs:
8445 case Builtin::BI__builtin_cabsl:
8446 return Builtin::BI__builtin_abs;
8447 case Builtin::BIfabsf:
8448 case Builtin::BIfabs:
8449 case Builtin::BIfabsl:
8450 case Builtin::BIcabsf:
8451 case Builtin::BIcabs:
8452 case Builtin::BIcabsl:
8453 return Builtin::BIabs;
8454 }
8455 case AVK_Floating:
8456 switch (AbsKind) {
8457 default:
8458 return 0;
8459 case Builtin::BI__builtin_abs:
8460 case Builtin::BI__builtin_labs:
8461 case Builtin::BI__builtin_llabs:
8462 case Builtin::BI__builtin_cabsf:
8463 case Builtin::BI__builtin_cabs:
8464 case Builtin::BI__builtin_cabsl:
8465 return Builtin::BI__builtin_fabsf;
8466 case Builtin::BIabs:
8467 case Builtin::BIlabs:
8468 case Builtin::BIllabs:
8469 case Builtin::BIcabsf:
8470 case Builtin::BIcabs:
8471 case Builtin::BIcabsl:
8472 return Builtin::BIfabsf;
8473 }
8474 case AVK_Complex:
8475 switch (AbsKind) {
8476 default:
8477 return 0;
8478 case Builtin::BI__builtin_abs:
8479 case Builtin::BI__builtin_labs:
8480 case Builtin::BI__builtin_llabs:
8481 case Builtin::BI__builtin_fabsf:
8482 case Builtin::BI__builtin_fabs:
8483 case Builtin::BI__builtin_fabsl:
8484 return Builtin::BI__builtin_cabsf;
8485 case Builtin::BIabs:
8486 case Builtin::BIlabs:
8487 case Builtin::BIllabs:
8488 case Builtin::BIfabsf:
8489 case Builtin::BIfabs:
8490 case Builtin::BIfabsl:
8491 return Builtin::BIcabsf;
8492 }
8493 }
8494 llvm_unreachable("Unable to convert function");
8495 }
8496
8497 static unsigned getAbsoluteValueFunctionKind(const FunctionDecl *FDecl) {
8498 const IdentifierInfo *FnInfo = FDecl->getIdentifier();
8499 if (!FnInfo)
8500 return 0;
8501
8502 switch (FDecl->getBuiltinID()) {
8503 default:
8504 return 0;
8505 case Builtin::BI__builtin_abs:
8506 case Builtin::BI__builtin_fabs:
8507 case Builtin::BI__builtin_fabsf:
8508 case Builtin::BI__builtin_fabsl:
8509 case Builtin::BI__builtin_labs:
8510 case Builtin::BI__builtin_llabs:
8511 case Builtin::BI__builtin_cabs:
8512 case Builtin::BI__builtin_cabsf:
8513 case Builtin::BI__builtin_cabsl:
8514 case Builtin::BIabs:
8515 case Builtin::BIlabs:
8516 case Builtin::BIllabs:
8517 case Builtin::BIfabs:
8518 case Builtin::BIfabsf:
8519 case Builtin::BIfabsl:
8520 case Builtin::BIcabs:
8521 case Builtin::BIcabsf:
8522 case Builtin::BIcabsl:
8523 return FDecl->getBuiltinID();
8524 }
8525 llvm_unreachable("Unknown Builtin type");
8526 }
8527
8528 // If the replacement is valid, emit a note with replacement function.
8529 // Additionally, suggest including the proper header if not already included.
8530 static void emitReplacement(Sema &S, SourceLocation Loc, SourceRange Range,
8531 unsigned AbsKind, QualType ArgType) {
8532 bool EmitHeaderHint = true;
8533 const char *HeaderName = nullptr;
8534 const char *FunctionName = nullptr;
8535 if (S.getLangOpts().CPlusPlus && !ArgType->isAnyComplexType()) {
8536 FunctionName = "std::abs";
8537 if (ArgType->isIntegralOrEnumerationType()) {
8538 HeaderName = "cstdlib";
8539 } else if (ArgType->isRealFloatingType()) {
8540 HeaderName = "cmath";
8541 } else {
8542 llvm_unreachable("Invalid Type");
8543 }
8544
8545 // Lookup all std::abs
8546 if (NamespaceDecl *Std = S.getStdNamespace()) {
8547 LookupResult R(S, &S.Context.Idents.get("abs"), Loc, Sema::LookupAnyName);
8548 R.suppressDiagnostics();
8549 S.LookupQualifiedName(R, Std);
8550
8551 for (const auto *I : R) {
8552 const FunctionDecl *FDecl = nullptr;
8553 if (const UsingShadowDecl *UsingD = dyn_cast<UsingShadowDecl>(I)) {
8554 FDecl = dyn_cast<FunctionDecl>(UsingD->getTargetDecl());
8555 } else {
8556 FDecl = dyn_cast<FunctionDecl>(I);
8557 }
8558 if (!FDecl)
8559 continue;
8560
8561 // Found std::abs(), check that they are the right ones.
8562 if (FDecl->getNumParams() != 1)
8563 continue;
8564
8565 // Check that the parameter type can handle the argument.
8566 QualType ParamType = FDecl->getParamDecl(0)->getType();
8567 if (getAbsoluteValueKind(ArgType) == getAbsoluteValueKind(ParamType) &&
8568 S.Context.getTypeSize(ArgType) <=
8569 S.Context.getTypeSize(ParamType)) {
8570 // Found a function, don't need the header hint.
8571 EmitHeaderHint = false;
8572 break;
8573 }
8574 }
8575 }
8576 } else {
8577 FunctionName = S.Context.BuiltinInfo.getName(AbsKind);
8578 HeaderName = S.Context.BuiltinInfo.getHeaderName(AbsKind);
8579
8580 if (HeaderName) {
8581 DeclarationName DN(&S.Context.Idents.get(FunctionName));
8582 LookupResult R(S, DN, Loc, Sema::LookupAnyName);
8583 R.suppressDiagnostics();
8584 S.LookupName(R, S.getCurScope());
8585
8586 if (R.isSingleResult()) {
8587 FunctionDecl *FD = dyn_cast<FunctionDecl>(R.getFoundDecl());
8588 if (FD && FD->getBuiltinID() == AbsKind) {
8589 EmitHeaderHint = false;
8590 } else {
8591 return;
8592 }
8593 } else if (!R.empty()) {
8594 return;
8595 }
8596 }
8597 }
8598
8599 S.Diag(Loc, diag::note_replace_abs_function)
8600 << FunctionName << FixItHint::CreateReplacement(Range, FunctionName);
8601
8602 if (!HeaderName)
8603 return;
8604
8605 if (!EmitHeaderHint)
8606 return;
8607
8608 S.Diag(Loc, diag::note_include_header_or_declare) << HeaderName
8609 << FunctionName;
8610 }
8611
8612 template <std::size_t StrLen>
8613 static bool IsStdFunction(const FunctionDecl *FDecl,
8614 const char (&Str)[StrLen]) {
8615 if (!FDecl)
8616 return false;
8617 if (!FDecl->getIdentifier() || !FDecl->getIdentifier()->isStr(Str))
8618 return false;
8619 if (!FDecl->isInStdNamespace())
8620 return false;
8621
8622 return true;
8623 }
8624
8625 // Warn when using the wrong abs() function.
8626 void Sema::CheckAbsoluteValueFunction(const CallExpr *Call,
8627 const FunctionDecl *FDecl) {
8628 if (Call->getNumArgs() != 1)
8629 return;
8630
8631 unsigned AbsKind = getAbsoluteValueFunctionKind(FDecl);
8632 bool IsStdAbs = IsStdFunction(FDecl, "abs");
8633 if (AbsKind == 0 && !IsStdAbs)
8634 return;
8635
8636 QualType ArgType = Call->getArg(0)->IgnoreParenImpCasts()->getType();
8637 QualType ParamType = Call->getArg(0)->getType();
8638
8639 // Unsigned types cannot be negative. Suggest removing the absolute value
8640 // function call.
8641 if (ArgType->isUnsignedIntegerType()) {
8642 const char *FunctionName =
8643 IsStdAbs ? "std::abs" : Context.BuiltinInfo.getName(AbsKind);
8644 Diag(Call->getExprLoc(), diag::warn_unsigned_abs) << ArgType << ParamType;
8645 Diag(Call->getExprLoc(), diag::note_remove_abs)
8646 << FunctionName
8647 << FixItHint::CreateRemoval(Call->getCallee()->getSourceRange());
8648 return;
8649 }
8650
8651 // Taking the absolute value of a pointer is very suspicious, they probably
8652 // wanted to index into an array, dereference a pointer, call a function, etc.
8653 if (ArgType->isPointerType() || ArgType->canDecayToPointerType()) {
8654 unsigned DiagType = 0;
8655 if (ArgType->isFunctionType())
8656 DiagType = 1;
8657 else if (ArgType->isArrayType())
8658 DiagType = 2;
8659
8660 Diag(Call->getExprLoc(), diag::warn_pointer_abs) << DiagType << ArgType;
8661 return;
8662 }
8663
8664 // std::abs has overloads which prevent most of the absolute value problems
8665 // from occurring.
8666 if (IsStdAbs)
8667 return;
8668
8669 AbsoluteValueKind ArgValueKind = getAbsoluteValueKind(ArgType);
8670 AbsoluteValueKind ParamValueKind = getAbsoluteValueKind(ParamType);
8671
8672 // The argument and parameter are the same kind. Check if they are the right
8673 // size.
8674 if (ArgValueKind == ParamValueKind) {
8675 if (Context.getTypeSize(ArgType) <= Context.getTypeSize(ParamType))
8676 return;
8677
8678 unsigned NewAbsKind = getBestAbsFunction(Context, ArgType, AbsKind);
8679 Diag(Call->getExprLoc(), diag::warn_abs_too_small)
8680 << FDecl << ArgType << ParamType;
8681
8682 if (NewAbsKind == 0)
8683 return;
8684
8685 emitReplacement(*this, Call->getExprLoc(),
8686 Call->getCallee()->getSourceRange(), NewAbsKind, ArgType);
8687 return;
8688 }
8689
8690 // ArgValueKind != ParamValueKind
8691 // The wrong type of absolute value function was used. Attempt to find the
8692 // proper one.
8693 unsigned NewAbsKind = changeAbsFunction(AbsKind, ArgValueKind);
8694 NewAbsKind = getBestAbsFunction(Context, ArgType, NewAbsKind);
8695 if (NewAbsKind == 0)
8696 return;
8697
8698 Diag(Call->getExprLoc(), diag::warn_wrong_absolute_value_type)
8699 << FDecl << ParamValueKind << ArgValueKind;
8700
8701 emitReplacement(*this, Call->getExprLoc(),
8702 Call->getCallee()->getSourceRange(), NewAbsKind, ArgType);
8703 }
8704
8705 //===--- CHECK: Warn on use of std::max and unsigned zero. r---------------===//
8706 void Sema::CheckMaxUnsignedZero(const CallExpr *Call,
8707 const FunctionDecl *FDecl) {
8708 if (!Call || !FDecl) return;
8709
8710 // Ignore template specializations and macros.
8711 if (inTemplateInstantiation()) return;
8712 if (Call->getExprLoc().isMacroID()) return;
8713
8714 // Only care about the one template argument, two function parameter std::max
8715 if (Call->getNumArgs() != 2) return;
8716 if (!IsStdFunction(FDecl, "max")) return;
8717 const auto * ArgList = FDecl->getTemplateSpecializationArgs();
8718 if (!ArgList) return;
8719 if (ArgList->size() != 1) return;
8720
8721 // Check that template type argument is unsigned integer.
8722 const auto& TA = ArgList->get(0);
8723 if (TA.getKind() != TemplateArgument::Type) return;
8724 QualType ArgType = TA.getAsType();
8725 if (!ArgType->isUnsignedIntegerType()) return;
8726
8727 // See if either argument is a literal zero.
8728 auto IsLiteralZeroArg = [](const Expr* E) -> bool {
8729 const auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E);
8730 if (!MTE) return false;
8731 const auto *Num = dyn_cast<IntegerLiteral>(MTE->GetTemporaryExpr());
8732 if (!Num) return false;
8733 if (Num->getValue() != 0) return false;
8734 return true;
8735 };
8736
8737 const Expr *FirstArg = Call->getArg(0);
8738 const Expr *SecondArg = Call->getArg(1);
8739 const bool IsFirstArgZero = IsLiteralZeroArg(FirstArg);
8740 const bool IsSecondArgZero = IsLiteralZeroArg(SecondArg);
8741
8742 // Only warn when exactly one argument is zero.
8743 if (IsFirstArgZero == IsSecondArgZero) return;
8744
8745 SourceRange FirstRange = FirstArg->getSourceRange();
8746 SourceRange SecondRange = SecondArg->getSourceRange();
8747
8748 SourceRange ZeroRange = IsFirstArgZero ? FirstRange : SecondRange;
8749
8750 Diag(Call->getExprLoc(), diag::warn_max_unsigned_zero)
8751 << IsFirstArgZero << Call->getCallee()->getSourceRange() << ZeroRange;
8752
8753 // Deduce what parts to remove so that "std::max(0u, foo)" becomes "(foo)".
8754 SourceRange RemovalRange;
8755 if (IsFirstArgZero) {
8756 RemovalRange = SourceRange(FirstRange.getBegin(),
8757 SecondRange.getBegin().getLocWithOffset(-1));
8758 } else {
8759 RemovalRange = SourceRange(getLocForEndOfToken(FirstRange.getEnd()),
8760 SecondRange.getEnd());
8761 }
8762
8763 Diag(Call->getExprLoc(), diag::note_remove_max_call)
8764 << FixItHint::CreateRemoval(Call->getCallee()->getSourceRange())
8765 << FixItHint::CreateRemoval(RemovalRange);
8766 }
8767
8768 //===--- CHECK: Standard memory functions ---------------------------------===//
8769
8770 /// Takes the expression passed to the size_t parameter of functions
8771 /// such as memcmp, strncat, etc and warns if it's a comparison.
8772 ///
8773 /// This is to catch typos like `if (memcmp(&a, &b, sizeof(a) > 0))`.
8774 static bool CheckMemorySizeofForComparison(Sema &S, const Expr *E,
8775 IdentifierInfo *FnName,
8776 SourceLocation FnLoc,
8777 SourceLocation RParenLoc) {
8778 const BinaryOperator *Size = dyn_cast<BinaryOperator>(E);
8779 if (!Size)
8780 return false;
8781
8782 // if E is binop and op is <=>, >, <, >=, <=, ==, &&, ||:
8783 if (!Size->isComparisonOp() && !Size->isLogicalOp())
8784 return false;
8785
8786 SourceRange SizeRange = Size->getSourceRange();
8787 S.Diag(Size->getOperatorLoc(), diag::warn_memsize_comparison)
8788 << SizeRange << FnName;
8789 S.Diag(FnLoc, diag::note_memsize_comparison_paren)
8790 << FnName
8791 << FixItHint::CreateInsertion(
8792 S.getLocForEndOfToken(Size->getLHS()->getEndLoc()), ")")
8793 << FixItHint::CreateRemoval(RParenLoc);
8794 S.Diag(SizeRange.getBegin(), diag::note_memsize_comparison_cast_silence)
8795 << FixItHint::CreateInsertion(SizeRange.getBegin(), "(size_t)(")
8796 << FixItHint::CreateInsertion(S.getLocForEndOfToken(SizeRange.getEnd()),
8797 ")");
8798
8799 return true;
8800 }
8801
8802 /// Determine whether the given type is or contains a dynamic class type
8803 /// (e.g., whether it has a vtable).
8804 static const CXXRecordDecl *getContainedDynamicClass(QualType T,
8805 bool &IsContained) {
8806 // Look through array types while ignoring qualifiers.
8807 const Type *Ty = T->getBaseElementTypeUnsafe();
8808 IsContained = false;
8809
8810 const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
8811 RD = RD ? RD->getDefinition() : nullptr;
8812 if (!RD || RD->isInvalidDecl())
8813 return nullptr;
8814
8815 if (RD->isDynamicClass())
8816 return RD;
8817
8818 // Check all the fields. If any bases were dynamic, the class is dynamic.
8819 // It's impossible for a class to transitively contain itself by value, so
8820 // infinite recursion is impossible.
8821 for (auto *FD : RD->fields()) {
8822 bool SubContained;
8823 if (const CXXRecordDecl *ContainedRD =
8824 getContainedDynamicClass(FD->getType(), SubContained)) {
8825 IsContained = true;
8826 return ContainedRD;
8827 }
8828 }
8829
8830 return nullptr;
8831 }
8832
8833 static const UnaryExprOrTypeTraitExpr *getAsSizeOfExpr(const Expr *E) {
8834 if (const auto *Unary = dyn_cast<UnaryExprOrTypeTraitExpr>(E))
8835 if (Unary->getKind() == UETT_SizeOf)
8836 return Unary;
8837 return nullptr;
8838 }
8839
8840 /// If E is a sizeof expression, returns its argument expression,
8841 /// otherwise returns NULL.
8842 static const Expr *getSizeOfExprArg(const Expr *E) {
8843 if (const UnaryExprOrTypeTraitExpr *SizeOf = getAsSizeOfExpr(E))
8844 if (!SizeOf->isArgumentType())
8845 return SizeOf->getArgumentExpr()->IgnoreParenImpCasts();
8846 return nullptr;
8847 }
8848
8849 /// If E is a sizeof expression, returns its argument type.
8850 static QualType getSizeOfArgType(const Expr *E) {
8851 if (const UnaryExprOrTypeTraitExpr *SizeOf = getAsSizeOfExpr(E))
8852 return SizeOf->getTypeOfArgument();
8853 return QualType();
8854 }
8855
8856 namespace {
8857
8858 struct SearchNonTrivialToInitializeField
8859 : DefaultInitializedTypeVisitor<SearchNonTrivialToInitializeField> {
8860 using Super =
8861 DefaultInitializedTypeVisitor<SearchNonTrivialToInitializeField>;
8862
8863 SearchNonTrivialToInitializeField(const Expr *E, Sema &S) : E(E), S(S) {}
8864
8865 void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType FT,
8866 SourceLocation SL) {
8867 if (const auto *AT = asDerived().getContext().getAsArrayType(FT)) {
8868 asDerived().visitArray(PDIK, AT, SL);
8869 return;
8870 }
8871
8872 Super::visitWithKind(PDIK, FT, SL);
8873 }
8874
8875 void visitARCStrong(QualType FT, SourceLocation SL) {
8876 S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 1);
8877 }
8878 void visitARCWeak(QualType FT, SourceLocation SL) {
8879 S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 1);
8880 }
8881 void visitStruct(QualType FT, SourceLocation SL) {
8882 for (const FieldDecl *FD : FT->castAs<RecordType>()->getDecl()->fields())
8883 visit(FD->getType(), FD->getLocation());
8884 }
8885 void visitArray(QualType::PrimitiveDefaultInitializeKind PDIK,
8886 const ArrayType *AT, SourceLocation SL) {
8887 visit(getContext().getBaseElementType(AT), SL);
8888 }
8889 void visitTrivial(QualType FT, SourceLocation SL) {}
8890
8891 static void diag(QualType RT, const Expr *E, Sema &S) {
8892 SearchNonTrivialToInitializeField(E, S).visitStruct(RT, SourceLocation());
8893 }
8894
8895 ASTContext &getContext() { return S.getASTContext(); }
8896
8897 const Expr *E;
8898 Sema &S;
8899 };
8900
8901 struct SearchNonTrivialToCopyField
8902 : CopiedTypeVisitor<SearchNonTrivialToCopyField, false> {
8903 using Super = CopiedTypeVisitor<SearchNonTrivialToCopyField, false>;
8904
8905 SearchNonTrivialToCopyField(const Expr *E, Sema &S) : E(E), S(S) {}
8906
8907 void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType FT,
8908 SourceLocation SL) {
8909 if (const auto *AT = asDerived().getContext().getAsArrayType(FT)) {
8910 asDerived().visitArray(PCK, AT, SL);
8911 return;
8912 }
8913
8914 Super::visitWithKind(PCK, FT, SL);
8915 }
8916
8917 void visitARCStrong(QualType FT, SourceLocation SL) {
8918 S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 0);
8919 }
8920 void visitARCWeak(QualType FT, SourceLocation SL) {
8921 S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 0);
8922 }
8923 void visitStruct(QualType FT, SourceLocation SL) {
8924 for (const FieldDecl *FD : FT->castAs<RecordType>()->getDecl()->fields())
8925 visit(FD->getType(), FD->getLocation());
8926 }
8927 void visitArray(QualType::PrimitiveCopyKind PCK, const ArrayType *AT,
8928 SourceLocation SL) {
8929 visit(getContext().getBaseElementType(AT), SL);
8930 }
8931 void preVisit(QualType::PrimitiveCopyKind PCK, QualType FT,
8932 SourceLocation SL) {}
8933 void visitTrivial(QualType FT, SourceLocation SL) {}
8934 void visitVolatileTrivial(QualType FT, SourceLocation SL) {}
8935
8936 static void diag(QualType RT, const Expr *E, Sema &S) {
8937 SearchNonTrivialToCopyField(E, S).visitStruct(RT, SourceLocation());
8938 }
8939
8940 ASTContext &getContext() { return S.getASTContext(); }
8941
8942 const Expr *E;
8943 Sema &S;
8944 };
8945
8946 }
8947
8948 /// Detect if \c SizeofExpr is likely to calculate the sizeof an object.
8949 static bool doesExprLikelyComputeSize(const Expr *SizeofExpr) {
8950 SizeofExpr = SizeofExpr->IgnoreParenImpCasts();
8951
8952 if (const auto *BO = dyn_cast<BinaryOperator>(SizeofExpr)) {
8953 if (BO->getOpcode() != BO_Mul && BO->getOpcode() != BO_Add)
8954 return false;
8955
8956 return doesExprLikelyComputeSize(BO->getLHS()) ||
8957 doesExprLikelyComputeSize(BO->getRHS());
8958 }
8959
8960 return getAsSizeOfExpr(SizeofExpr) != nullptr;
8961 }
8962
8963 /// Check if the ArgLoc originated from a macro passed to the call at CallLoc.
8964 ///
8965 /// \code
8966 /// #define MACRO 0
8967 /// foo(MACRO);
8968 /// foo(0);
8969 /// \endcode
8970 ///
8971 /// This should return true for the first call to foo, but not for the second
8972 /// (regardless of whether foo is a macro or function).
8973 static bool isArgumentExpandedFromMacro(SourceManager &SM,
8974 SourceLocation CallLoc,
8975 SourceLocation ArgLoc) {
8976 if (!CallLoc.isMacroID())
8977 return SM.getFileID(CallLoc) != SM.getFileID(ArgLoc);
8978
8979 return SM.getFileID(SM.getImmediateMacroCallerLoc(CallLoc)) !=
8980 SM.getFileID(SM.getImmediateMacroCallerLoc(ArgLoc));
8981 }
8982
8983 /// Diagnose cases like 'memset(buf, sizeof(buf), 0)', which should have the
8984 /// last two arguments transposed.
8985 static void CheckMemaccessSize(Sema &S, unsigned BId, const CallExpr *Call) {
8986 if (BId != Builtin::BImemset && BId != Builtin::BIbzero)
8987 return;
8988
8989 const Expr *SizeArg =
8990 Call->getArg(BId == Builtin::BImemset ? 2 : 1)->IgnoreImpCasts();
8991
8992 auto isLiteralZero = [](const Expr *E) {
8993 return isa<IntegerLiteral>(E) && cast<IntegerLiteral>(E)->getValue() == 0;
8994 };
8995
8996 // If we're memsetting or bzeroing 0 bytes, then this is likely an error.
8997 SourceLocation CallLoc = Call->getRParenLoc();
8998 SourceManager &SM = S.getSourceManager();
8999 if (isLiteralZero(SizeArg) &&
9000 !isArgumentExpandedFromMacro(SM, CallLoc, SizeArg->getExprLoc())) {
9001
9002 SourceLocation DiagLoc = SizeArg->getExprLoc();
9003
9004 // Some platforms #define bzero to __builtin_memset. See if this is the
9005 // case, and if so, emit a better diagnostic.
9006 if (BId == Builtin::BIbzero ||
9007 (CallLoc.isMacroID() && Lexer::getImmediateMacroName(
9008 CallLoc, SM, S.getLangOpts()) == "bzero")) {
9009 S.Diag(DiagLoc, diag::warn_suspicious_bzero_size);
9010 S.Diag(DiagLoc, diag::note_suspicious_bzero_size_silence);
9011 } else if (!isLiteralZero(Call->getArg(1)->IgnoreImpCasts())) {
9012 S.Diag(DiagLoc, diag::warn_suspicious_sizeof_memset) << 0;
9013 S.Diag(DiagLoc, diag::note_suspicious_sizeof_memset_silence) << 0;
9014 }
9015 return;
9016 }
9017
9018 // If the second argument to a memset is a sizeof expression and the third
9019 // isn't, this is also likely an error. This should catch
9020 // 'memset(buf, sizeof(buf), 0xff)'.
9021 if (BId == Builtin::BImemset &&
9022 doesExprLikelyComputeSize(Call->getArg(1)) &&
9023 !doesExprLikelyComputeSize(Call->getArg(2))) {
9024 SourceLocation DiagLoc = Call->getArg(1)->getExprLoc();
9025 S.Diag(DiagLoc, diag::warn_suspicious_sizeof_memset) << 1;
9026 S.Diag(DiagLoc, diag::note_suspicious_sizeof_memset_silence) << 1;
9027 return;
9028 }
9029 }
9030
9031 /// Check for dangerous or invalid arguments to memset().
9032 ///
9033 /// This issues warnings on known problematic, dangerous or unspecified
9034 /// arguments to the standard 'memset', 'memcpy', 'memmove', and 'memcmp'
9035 /// function calls.
9036 ///
9037 /// \param Call The call expression to diagnose.
9038 void Sema::CheckMemaccessArguments(const CallExpr *Call,
9039 unsigned BId,
9040 IdentifierInfo *FnName) {
9041 assert(BId != 0);
9042
9043 // It is possible to have a non-standard definition of memset. Validate
9044 // we have enough arguments, and if not, abort further checking.
9045 unsigned ExpectedNumArgs =
9046 (BId == Builtin::BIstrndup || BId == Builtin::BIbzero ? 2 : 3);
9047 if (Call->getNumArgs() < ExpectedNumArgs)
9048 return;
9049
9050 unsigned LastArg = (BId == Builtin::BImemset || BId == Builtin::BIbzero ||
9051 BId == Builtin::BIstrndup ? 1 : 2);
9052 unsigned LenArg =
9053 (BId == Builtin::BIbzero || BId == Builtin::BIstrndup ? 1 : 2);
9054 const Expr *LenExpr = Call->getArg(LenArg)->IgnoreParenImpCasts();
9055
9056 if (CheckMemorySizeofForComparison(*this, LenExpr, FnName,
9057 Call->getBeginLoc(), Call->getRParenLoc()))
9058 return;
9059
9060 // Catch cases like 'memset(buf, sizeof(buf), 0)'.
9061 CheckMemaccessSize(*this, BId, Call);
9062
9063 // We have special checking when the length is a sizeof expression.
9064 QualType SizeOfArgTy = getSizeOfArgType(LenExpr);
9065 const Expr *SizeOfArg = getSizeOfExprArg(LenExpr);
9066 llvm::FoldingSetNodeID SizeOfArgID;
9067
9068 // Although widely used, 'bzero' is not a standard function. Be more strict
9069 // with the argument types before allowing diagnostics and only allow the
9070 // form bzero(ptr, sizeof(...)).
9071 QualType FirstArgTy = Call->getArg(0)->IgnoreParenImpCasts()->getType();
9072 if (BId == Builtin::BIbzero && !FirstArgTy->getAs<PointerType>())
9073 return;
9074
9075 for (unsigned ArgIdx = 0; ArgIdx != LastArg; ++ArgIdx) {
9076 const Expr *Dest = Call->getArg(ArgIdx)->IgnoreParenImpCasts();
9077 SourceRange ArgRange = Call->getArg(ArgIdx)->getSourceRange();
9078
9079 QualType DestTy = Dest->getType();
9080 QualType PointeeTy;
9081 if (const PointerType *DestPtrTy = DestTy->getAs<PointerType>()) {
9082 PointeeTy = DestPtrTy->getPointeeType();
9083
9084 // Never warn about void type pointers. This can be used to suppress
9085 // false positives.
9086 if (PointeeTy->isVoidType())
9087 continue;
9088
9089 // Catch "memset(p, 0, sizeof(p))" -- needs to be sizeof(*p). Do this by
9090 // actually comparing the expressions for equality. Because computing the
9091 // expression IDs can be expensive, we only do this if the diagnostic is
9092 // enabled.
9093 if (SizeOfArg &&
9094 !Diags.isIgnored(diag::warn_sizeof_pointer_expr_memaccess,
9095 SizeOfArg->getExprLoc())) {
9096 // We only compute IDs for expressions if the warning is enabled, and
9097 // cache the sizeof arg's ID.
9098 if (SizeOfArgID == llvm::FoldingSetNodeID())
9099 SizeOfArg->Profile(SizeOfArgID, Context, true);
9100 llvm::FoldingSetNodeID DestID;
9101 Dest->Profile(DestID, Context, true);
9102 if (DestID == SizeOfArgID) {
9103 // TODO: For strncpy() and friends, this could suggest sizeof(dst)
9104 // over sizeof(src) as well.
9105 unsigned ActionIdx = 0; // Default is to suggest dereferencing.
9106 StringRef ReadableName = FnName->getName();
9107
9108 if (const UnaryOperator *UnaryOp = dyn_cast<UnaryOperator>(Dest))
9109 if (UnaryOp->getOpcode() == UO_AddrOf)
9110 ActionIdx = 1; // If its an address-of operator, just remove it.
9111 if (!PointeeTy->isIncompleteType() &&
9112 (Context.getTypeSize(PointeeTy) == Context.getCharWidth()))
9113 ActionIdx = 2; // If the pointee's size is sizeof(char),
9114 // suggest an explicit length.
9115
9116 // If the function is defined as a builtin macro, do not show macro
9117 // expansion.
9118 SourceLocation SL = SizeOfArg->getExprLoc();
9119 SourceRange DSR = Dest->getSourceRange();
9120 SourceRange SSR = SizeOfArg->getSourceRange();
9121 SourceManager &SM = getSourceManager();
9122
9123 if (SM.isMacroArgExpansion(SL)) {
9124 ReadableName = Lexer::getImmediateMacroName(SL, SM, LangOpts);
9125 SL = SM.getSpellingLoc(SL);
9126 DSR = SourceRange(SM.getSpellingLoc(DSR.getBegin()),
9127 SM.getSpellingLoc(DSR.getEnd()));
9128 SSR = SourceRange(SM.getSpellingLoc(SSR.getBegin()),
9129 SM.getSpellingLoc(SSR.getEnd()));
9130 }
9131
9132 DiagRuntimeBehavior(SL, SizeOfArg,
9133 PDiag(diag::warn_sizeof_pointer_expr_memaccess)
9134 << ReadableName
9135 << PointeeTy
9136 << DestTy
9137 << DSR
9138 << SSR);
9139 DiagRuntimeBehavior(SL, SizeOfArg,
9140 PDiag(diag::warn_sizeof_pointer_expr_memaccess_note)
9141 << ActionIdx
9142 << SSR);
9143
9144 break;
9145 }
9146 }
9147
9148 // Also check for cases where the sizeof argument is the exact same
9149 // type as the memory argument, and where it points to a user-defined
9150 // record type.
9151 if (SizeOfArgTy != QualType()) {
9152 if (PointeeTy->isRecordType() &&
9153 Context.typesAreCompatible(SizeOfArgTy, DestTy)) {
9154 DiagRuntimeBehavior(LenExpr->getExprLoc(), Dest,
9155 PDiag(diag::warn_sizeof_pointer_type_memaccess)
9156 << FnName << SizeOfArgTy << ArgIdx
9157 << PointeeTy << Dest->getSourceRange()
9158 << LenExpr->getSourceRange());
9159 break;
9160 }
9161 }
9162 } else if (DestTy->isArrayType()) {
9163 PointeeTy = DestTy;
9164 }
9165
9166 if (PointeeTy == QualType())
9167 continue;
9168
9169 // Always complain about dynamic classes.
9170 bool IsContained;
9171 if (const CXXRecordDecl *ContainedRD =
9172 getContainedDynamicClass(PointeeTy, IsContained)) {
9173
9174 unsigned OperationType = 0;
9175 // "overwritten" if we're warning about the destination for any call
9176 // but memcmp; otherwise a verb appropriate to the call.
9177 if (ArgIdx != 0 || BId == Builtin::BImemcmp) {
9178 if (BId == Builtin::BImemcpy)
9179 OperationType = 1;
9180 else if(BId == Builtin::BImemmove)
9181 OperationType = 2;
9182 else if (BId == Builtin::BImemcmp)
9183 OperationType = 3;
9184 }
9185
9186 DiagRuntimeBehavior(
9187 Dest->getExprLoc(), Dest,
9188 PDiag(diag::warn_dyn_class_memaccess)
9189 << (BId == Builtin::BImemcmp ? ArgIdx + 2 : ArgIdx)
9190 << FnName << IsContained << ContainedRD << OperationType
9191 << Call->getCallee()->getSourceRange());
9192 } else if (PointeeTy.hasNonTrivialObjCLifetime() &&
9193 BId != Builtin::BImemset)
9194 DiagRuntimeBehavior(
9195 Dest->getExprLoc(), Dest,
9196 PDiag(diag::warn_arc_object_memaccess)
9197 << ArgIdx << FnName << PointeeTy
9198 << Call->getCallee()->getSourceRange());
9199 else if (const auto *RT = PointeeTy->getAs<RecordType>()) {
9200 if ((BId == Builtin::BImemset || BId == Builtin::BIbzero) &&
9201 RT->getDecl()->isNonTrivialToPrimitiveDefaultInitialize()) {
9202 DiagRuntimeBehavior(Dest->getExprLoc(), Dest,
9203 PDiag(diag::warn_cstruct_memaccess)
9204 << ArgIdx << FnName << PointeeTy << 0);
9205 SearchNonTrivialToInitializeField::diag(PointeeTy, Dest, *this);
9206 } else if ((BId == Builtin::BImemcpy || BId == Builtin::BImemmove) &&
9207 RT->getDecl()->isNonTrivialToPrimitiveCopy()) {
9208 DiagRuntimeBehavior(Dest->getExprLoc(), Dest,
9209 PDiag(diag::warn_cstruct_memaccess)
9210 << ArgIdx << FnName << PointeeTy << 1);
9211 SearchNonTrivialToCopyField::diag(PointeeTy, Dest, *this);
9212 } else {
9213 continue;
9214 }
9215 } else
9216 continue;
9217
9218 DiagRuntimeBehavior(
9219 Dest->getExprLoc(), Dest,
9220 PDiag(diag::note_bad_memaccess_silence)
9221 << FixItHint::CreateInsertion(ArgRange.getBegin(), "(void*)"));
9222 break;
9223 }
9224 }
9225
9226 // A little helper routine: ignore addition and subtraction of integer literals.
9227 // This intentionally does not ignore all integer constant expressions because
9228 // we don't want to remove sizeof().
9229 static const Expr *ignoreLiteralAdditions(const Expr *Ex, ASTContext &Ctx) {
9230 Ex = Ex->IgnoreParenCasts();
9231
9232 while (true) {
9233 const BinaryOperator * BO = dyn_cast<BinaryOperator>(Ex);
9234 if (!BO || !BO->isAdditiveOp())
9235 break;
9236
9237 const Expr *RHS = BO->getRHS()->IgnoreParenCasts();
9238 const Expr *LHS = BO->getLHS()->IgnoreParenCasts();
9239
9240 if (isa<IntegerLiteral>(RHS))
9241 Ex = LHS;
9242 else if (isa<IntegerLiteral>(LHS))
9243 Ex = RHS;
9244 else
9245 break;
9246 }
9247
9248 return Ex;
9249 }
9250
9251 static bool isConstantSizeArrayWithMoreThanOneElement(QualType Ty,
9252 ASTContext &Context) {
9253 // Only handle constant-sized or VLAs, but not flexible members.
9254 if (const ConstantArrayType *CAT = Context.getAsConstantArrayType(Ty)) {
9255 // Only issue the FIXIT for arrays of size > 1.
9256 if (CAT->getSize().getSExtValue() <= 1)
9257 return false;
9258 } else if (!Ty->isVariableArrayType()) {
9259 return false;
9260 }
9261 return true;
9262 }
9263
9264 // Warn if the user has made the 'size' argument to strlcpy or strlcat
9265 // be the size of the source, instead of the destination.
9266 void Sema::CheckStrlcpycatArguments(const CallExpr *Call,
9267 IdentifierInfo *FnName) {
9268
9269 // Don't crash if the user has the wrong number of arguments
9270 unsigned NumArgs = Call->getNumArgs();
9271 if ((NumArgs != 3) && (NumArgs != 4))
9272 return;
9273
9274 const Expr *SrcArg = ignoreLiteralAdditions(Call->getArg(1), Context);
9275 const Expr *SizeArg = ignoreLiteralAdditions(Call->getArg(2), Context);
9276 const Expr *CompareWithSrc = nullptr;
9277
9278 if (CheckMemorySizeofForComparison(*this, SizeArg, FnName,
9279 Call->getBeginLoc(), Call->getRParenLoc()))
9280 return;
9281
9282 // Look for 'strlcpy(dst, x, sizeof(x))'
9283 if (const Expr *Ex = getSizeOfExprArg(SizeArg))
9284 CompareWithSrc = Ex;
9285 else {
9286 // Look for 'strlcpy(dst, x, strlen(x))'
9287 if (const CallExpr *SizeCall = dyn_cast<CallExpr>(SizeArg)) {
9288 if (SizeCall->getBuiltinCallee() == Builtin::BIstrlen &&
9289 SizeCall->getNumArgs() == 1)
9290 CompareWithSrc = ignoreLiteralAdditions(SizeCall->getArg(0), Context);
9291 }
9292 }
9293
9294 if (!CompareWithSrc)
9295 return;
9296
9297 // Determine if the argument to sizeof/strlen is equal to the source
9298 // argument. In principle there's all kinds of things you could do
9299 // here, for instance creating an == expression and evaluating it with
9300 // EvaluateAsBooleanCondition, but this uses a more direct technique:
9301 const DeclRefExpr *SrcArgDRE = dyn_cast<DeclRefExpr>(SrcArg);
9302 if (!SrcArgDRE)
9303 return;
9304
9305 const DeclRefExpr *CompareWithSrcDRE = dyn_cast<DeclRefExpr>(CompareWithSrc);
9306 if (!CompareWithSrcDRE ||
9307 SrcArgDRE->getDecl() != CompareWithSrcDRE->getDecl())
9308 return;
9309
9310 const Expr *OriginalSizeArg = Call->getArg(2);
9311 Diag(CompareWithSrcDRE->getBeginLoc(), diag::warn_strlcpycat_wrong_size)
9312 << OriginalSizeArg->getSourceRange() << FnName;
9313
9314 // Output a FIXIT hint if the destination is an array (rather than a
9315 // pointer to an array). This could be enhanced to handle some
9316 // pointers if we know the actual size, like if DstArg is 'array+2'
9317 // we could say 'sizeof(array)-2'.
9318 const Expr *DstArg = Call->getArg(0)->IgnoreParenImpCasts();
9319 if (!isConstantSizeArrayWithMoreThanOneElement(DstArg->getType(), Context))
9320 return;
9321
9322 SmallString<128> sizeString;
9323 llvm::raw_svector_ostream OS(sizeString);
9324 OS << "sizeof(";
9325 DstArg->printPretty(OS, nullptr, getPrintingPolicy());
9326 OS << ")";
9327
9328 Diag(OriginalSizeArg->getBeginLoc(), diag::note_strlcpycat_wrong_size)
9329 << FixItHint::CreateReplacement(OriginalSizeArg->getSourceRange(),
9330 OS.str());
9331 }
9332
9333 /// Check if two expressions refer to the same declaration.
9334 static bool referToTheSameDecl(const Expr *E1, const Expr *E2) {
9335 if (const DeclRefExpr *D1 = dyn_cast_or_null<DeclRefExpr>(E1))
9336 if (const DeclRefExpr *D2 = dyn_cast_or_null<DeclRefExpr>(E2))
9337 return D1->getDecl() == D2->getDecl();
9338 return false;
9339 }
9340
9341 static const Expr *getStrlenExprArg(const Expr *E) {
9342 if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
9343 const FunctionDecl *FD = CE->getDirectCallee();
9344 if (!FD || FD->getMemoryFunctionKind() != Builtin::BIstrlen)
9345 return nullptr;
9346 return CE->getArg(0)->IgnoreParenCasts();
9347 }
9348 return nullptr;
9349 }
9350
9351 // Warn on anti-patterns as the 'size' argument to strncat.
9352 // The correct size argument should look like following:
9353 // strncat(dst, src, sizeof(dst) - strlen(dest) - 1);
9354 void Sema::CheckStrncatArguments(const CallExpr *CE,
9355 IdentifierInfo *FnName) {
9356 // Don't crash if the user has the wrong number of arguments.
9357 if (CE->getNumArgs() < 3)
9358 return;
9359 const Expr *DstArg = CE->getArg(0)->IgnoreParenCasts();
9360 const Expr *SrcArg = CE->getArg(1)->IgnoreParenCasts();
9361 const Expr *LenArg = CE->getArg(2)->IgnoreParenCasts();
9362
9363 if (CheckMemorySizeofForComparison(*this, LenArg, FnName, CE->getBeginLoc(),
9364 CE->getRParenLoc()))
9365 return;
9366
9367 // Identify common expressions, which are wrongly used as the size argument
9368 // to strncat and may lead to buffer overflows.
9369 unsigned PatternType = 0;
9370 if (const Expr *SizeOfArg = getSizeOfExprArg(LenArg)) {
9371 // - sizeof(dst)
9372 if (referToTheSameDecl(SizeOfArg, DstArg))
9373 PatternType = 1;
9374 // - sizeof(src)
9375 else if (referToTheSameDecl(SizeOfArg, SrcArg))
9376 PatternType = 2;
9377 } else if (const BinaryOperator *BE = dyn_cast<BinaryOperator>(LenArg)) {
9378 if (BE->getOpcode() == BO_Sub) {
9379 const Expr *L = BE->getLHS()->IgnoreParenCasts();
9380 const Expr *R = BE->getRHS()->IgnoreParenCasts();
9381 // - sizeof(dst) - strlen(dst)
9382 if (referToTheSameDecl(DstArg, getSizeOfExprArg(L)) &&
9383 referToTheSameDecl(DstArg, getStrlenExprArg(R)))
9384 PatternType = 1;
9385 // - sizeof(src) - (anything)
9386 else if (referToTheSameDecl(SrcArg, getSizeOfExprArg(L)))
9387 PatternType = 2;
9388 }
9389 }
9390
9391 if (PatternType == 0)
9392 return;
9393
9394 // Generate the diagnostic.
9395 SourceLocation SL = LenArg->getBeginLoc();
9396 SourceRange SR = LenArg->getSourceRange();
9397 SourceManager &SM = getSourceManager();
9398
9399 // If the function is defined as a builtin macro, do not show macro expansion.
9400 if (SM.isMacroArgExpansion(SL)) {
9401 SL = SM.getSpellingLoc(SL);
9402 SR = SourceRange(SM.getSpellingLoc(SR.getBegin()),
9403 SM.getSpellingLoc(SR.getEnd()));
9404 }
9405
9406 // Check if the destination is an array (rather than a pointer to an array).
9407 QualType DstTy = DstArg->getType();
9408 bool isKnownSizeArray = isConstantSizeArrayWithMoreThanOneElement(DstTy,
9409 Context);
9410 if (!isKnownSizeArray) {
9411 if (PatternType == 1)
9412 Diag(SL, diag::warn_strncat_wrong_size) << SR;
9413 else
9414 Diag(SL, diag::warn_strncat_src_size) << SR;
9415 return;
9416 }
9417
9418 if (PatternType == 1)
9419 Diag(SL, diag::warn_strncat_large_size) << SR;
9420 else
9421 Diag(SL, diag::warn_strncat_src_size) << SR;
9422
9423 SmallString<128> sizeString;
9424 llvm::raw_svector_ostream OS(sizeString);
9425 OS << "sizeof(";
9426 DstArg->printPretty(OS, nullptr, getPrintingPolicy());
9427 OS << ") - ";
9428 OS << "strlen(";
9429 DstArg->printPretty(OS, nullptr, getPrintingPolicy());
9430 OS << ") - 1";
9431
9432 Diag(SL, diag::note_strncat_wrong_size)
9433 << FixItHint::CreateReplacement(SR, OS.str());
9434 }
9435
9436 void
9437 Sema::CheckReturnValExpr(Expr *RetValExp, QualType lhsType,
9438 SourceLocation ReturnLoc,
9439 bool isObjCMethod,
9440 const AttrVec *Attrs,
9441 const FunctionDecl *FD) {
9442 // Check if the return value is null but should not be.
9443 if (((Attrs && hasSpecificAttr<ReturnsNonNullAttr>(*Attrs)) ||
9444 (!isObjCMethod && isNonNullType(Context, lhsType))) &&
9445 CheckNonNullExpr(*this, RetValExp))
9446 Diag(ReturnLoc, diag::warn_null_ret)
9447 << (isObjCMethod ? 1 : 0) << RetValExp->getSourceRange();
9448
9449 // C++11 [basic.stc.dynamic.allocation]p4:
9450 // If an allocation function declared with a non-throwing
9451 // exception-specification fails to allocate storage, it shall return
9452 // a null pointer. Any other allocation function that fails to allocate
9453 // storage shall indicate failure only by throwing an exception [...]
9454 if (FD) {
9455 OverloadedOperatorKind Op = FD->getOverloadedOperator();
9456 if (Op == OO_New || Op == OO_Array_New) {
9457 const FunctionProtoType *Proto
9458 = FD->getType()->castAs<FunctionProtoType>();
9459 if (!Proto->isNothrow(/*ResultIfDependent*/true) &&
9460 CheckNonNullExpr(*this, RetValExp))
9461 Diag(ReturnLoc, diag::warn_operator_new_returns_null)
9462 << FD << getLangOpts().CPlusPlus11;
9463 }
9464 }
9465 }
9466
9467 //===--- CHECK: Floating-Point comparisons (-Wfloat-equal) ---------------===//
9468
9469 /// Check for comparisons of floating point operands using != and ==.
9470 /// Issue a warning if these are no self-comparisons, as they are not likely
9471 /// to do what the programmer intended.
9472 void Sema::CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr *RHS) {
9473 Expr* LeftExprSansParen = LHS->IgnoreParenImpCasts();
9474 Expr* RightExprSansParen = RHS->IgnoreParenImpCasts();
9475
9476 // Special case: check for x == x (which is OK).
9477 // Do not emit warnings for such cases.
9478 if (DeclRefExpr* DRL = dyn_cast<DeclRefExpr>(LeftExprSansParen))
9479 if (DeclRefExpr* DRR = dyn_cast<DeclRefExpr>(RightExprSansParen))
9480 if (DRL->getDecl() == DRR->getDecl())
9481 return;
9482
9483 // Special case: check for comparisons against literals that can be exactly
9484 // represented by APFloat. In such cases, do not emit a warning. This
9485 // is a heuristic: often comparison against such literals are used to
9486 // detect if a value in a variable has not changed. This clearly can
9487 // lead to false negatives.
9488 if (FloatingLiteral* FLL = dyn_cast<FloatingLiteral>(LeftExprSansParen)) {
9489 if (FLL->isExact())
9490 return;
9491 } else
9492 if (FloatingLiteral* FLR = dyn_cast<FloatingLiteral>(RightExprSansParen))
9493 if (FLR->isExact())
9494 return;
9495
9496 // Check for comparisons with builtin types.
9497 if (CallExpr* CL = dyn_cast<CallExpr>(LeftExprSansParen))
9498 if (CL->getBuiltinCallee())
9499 return;
9500
9501 if (CallExpr* CR = dyn_cast<CallExpr>(RightExprSansParen))
9502 if (CR->getBuiltinCallee())
9503 return;
9504
9505 // Emit the diagnostic.
9506 Diag(Loc, diag::warn_floatingpoint_eq)
9507 << LHS->getSourceRange() << RHS->getSourceRange();
9508 }
9509
9510 //===--- CHECK: Integer mixed-sign comparisons (-Wsign-compare) --------===//
9511 //===--- CHECK: Lossy implicit conversions (-Wconversion) --------------===//
9512
9513 namespace {
9514
9515 /// Structure recording the 'active' range of an integer-valued
9516 /// expression.
9517 struct IntRange {
9518 /// The number of bits active in the int.
9519 unsigned Width;
9520
9521 /// True if the int is known not to have negative values.
9522 bool NonNegative;
9523
9524 IntRange(unsigned Width, bool NonNegative)
9525 : Width(Width), NonNegative(NonNegative) {}
9526
9527 /// Returns the range of the bool type.
9528 static IntRange forBoolType() {
9529 return IntRange(1, true);
9530 }
9531
9532 /// Returns the range of an opaque value of the given integral type.
9533 static IntRange forValueOfType(ASTContext &C, QualType T) {
9534 return forValueOfCanonicalType(C,
9535 T->getCanonicalTypeInternal().getTypePtr());
9536 }
9537
9538 /// Returns the range of an opaque value of a canonical integral type.
9539 static IntRange forValueOfCanonicalType(ASTContext &C, const Type *T) {
9540 assert(T->isCanonicalUnqualified());
9541
9542 if (const VectorType *VT = dyn_cast<VectorType>(T))
9543 T = VT->getElementType().getTypePtr();
9544 if (const ComplexType *CT = dyn_cast<ComplexType>(T))
9545 T = CT->getElementType().getTypePtr();
9546 if (const AtomicType *AT = dyn_cast<AtomicType>(T))
9547 T = AT->getValueType().getTypePtr();
9548
9549 if (!C.getLangOpts().CPlusPlus) {
9550 // For enum types in C code, use the underlying datatype.
9551 if (const EnumType *ET = dyn_cast<EnumType>(T))
9552 T = ET->getDecl()->getIntegerType().getDesugaredType(C).getTypePtr();
9553 } else if (const EnumType *ET = dyn_cast<EnumType>(T)) {
9554 // For enum types in C++, use the known bit width of the enumerators.
9555 EnumDecl *Enum = ET->getDecl();
9556 // In C++11, enums can have a fixed underlying type. Use this type to
9557 // compute the range.
9558 if (Enum->isFixed()) {
9559 return IntRange(C.getIntWidth(QualType(T, 0)),
9560 !ET->isSignedIntegerOrEnumerationType());
9561 }
9562
9563 unsigned NumPositive = Enum->getNumPositiveBits();
9564 unsigned NumNegative = Enum->getNumNegativeBits();
9565
9566 if (NumNegative == 0)
9567 return IntRange(NumPositive, true/*NonNegative*/);
9568 else
9569 return IntRange(std::max(NumPositive + 1, NumNegative),
9570 false/*NonNegative*/);
9571 }
9572
9573 const BuiltinType *BT = cast<BuiltinType>(T);
9574 assert(BT->isInteger());
9575
9576 return IntRange(C.getIntWidth(QualType(T, 0)), BT->isUnsignedInteger());
9577 }
9578
9579 /// Returns the "target" range of a canonical integral type, i.e.
9580 /// the range of values expressible in the type.
9581 ///
9582 /// This matches forValueOfCanonicalType except that enums have the
9583 /// full range of their type, not the range of their enumerators.
9584 static IntRange forTargetOfCanonicalType(ASTContext &C, const Type *T) {
9585 assert(T->isCanonicalUnqualified());
9586
9587 if (const VectorType *VT = dyn_cast<VectorType>(T))
9588 T = VT->getElementType().getTypePtr();
9589 if (const ComplexType *CT = dyn_cast<ComplexType>(T))
9590 T = CT->getElementType().getTypePtr();
9591 if (const AtomicType *AT = dyn_cast<AtomicType>(T))
9592 T = AT->getValueType().getTypePtr();
9593 if (const EnumType *ET = dyn_cast<EnumType>(T))
9594 T = C.getCanonicalType(ET->getDecl()->getIntegerType()).getTypePtr();
9595
9596 const BuiltinType *BT = cast<BuiltinType>(T);
9597 assert(BT->isInteger());
9598
9599 return IntRange(C.getIntWidth(QualType(T, 0)), BT->isUnsignedInteger());
9600 }
9601
9602 /// Returns the supremum of two ranges: i.e. their conservative merge.
9603 static IntRange join(IntRange L, IntRange R) {
9604 return IntRange(std::max(L.Width, R.Width),
9605 L.NonNegative && R.NonNegative);
9606 }
9607
9608 /// Returns the infinum of two ranges: i.e. their aggressive merge.
9609 static IntRange meet(IntRange L, IntRange R) {
9610 return IntRange(std::min(L.Width, R.Width),
9611 L.NonNegative || R.NonNegative);
9612 }
9613 };
9614
9615 } // namespace
9616
9617 static IntRange GetValueRange(ASTContext &C, llvm::APSInt &value,
9618 unsigned MaxWidth) {
9619 if (value.isSigned() && value.isNegative())
9620 return IntRange(value.getMinSignedBits(), false);
9621
9622 if (value.getBitWidth() > MaxWidth)
9623 value = value.trunc(MaxWidth);
9624
9625 // isNonNegative() just checks the sign bit without considering
9626 // signedness.
9627 return IntRange(value.getActiveBits(), true);
9628 }
9629
9630 static IntRange GetValueRange(ASTContext &C, APValue &result, QualType Ty,
9631 unsigned MaxWidth) {
9632 if (result.isInt())
9633 return GetValueRange(C, result.getInt(), MaxWidth);
9634
9635 if (result.isVector()) {
9636 IntRange R = GetValueRange(C, result.getVectorElt(0), Ty, MaxWidth);
9637 for (unsigned i = 1, e = result.getVectorLength(); i != e; ++i) {
9638 IntRange El = GetValueRange(C, result.getVectorElt(i), Ty, MaxWidth);
9639 R = IntRange::join(R, El);
9640 }
9641 return R;
9642 }
9643
9644 if (result.isComplexInt()) {
9645 IntRange R = GetValueRange(C, result.getComplexIntReal(), MaxWidth);
9646 IntRange I = GetValueRange(C, result.getComplexIntImag(), MaxWidth);
9647 return IntRange::join(R, I);
9648 }
9649
9650 // This can happen with lossless casts to intptr_t of "based" lvalues.
9651 // Assume it might use arbitrary bits.
9652 // FIXME: The only reason we need to pass the type in here is to get
9653 // the sign right on this one case. It would be nice if APValue
9654 // preserved this.
9655 assert(result.isLValue() || result.isAddrLabelDiff());
9656 return IntRange(MaxWidth, Ty->isUnsignedIntegerOrEnumerationType());
9657 }
9658
9659 static QualType GetExprType(const Expr *E) {
9660 QualType Ty = E->getType();
9661 if (const AtomicType *AtomicRHS = Ty->getAs<AtomicType>())
9662 Ty = AtomicRHS->getValueType();
9663 return Ty;
9664 }
9665
9666 /// Pseudo-evaluate the given integer expression, estimating the
9667 /// range of values it might take.
9668 ///
9669 /// \param MaxWidth - the width to which the value will be truncated
9670 static IntRange GetExprRange(ASTContext &C, const Expr *E, unsigned MaxWidth) {
9671 E = E->IgnoreParens();
9672
9673 // Try a full evaluation first.
9674 Expr::EvalResult result;
9675 if (E->EvaluateAsRValue(result, C))
9676 return GetValueRange(C, result.Val, GetExprType(E), MaxWidth);
9677
9678 // I think we only want to look through implicit casts here; if the
9679 // user has an explicit widening cast, we should treat the value as
9680 // being of the new, wider type.
9681 if (const auto *CE = dyn_cast<ImplicitCastExpr>(E)) {
9682 if (CE->getCastKind() == CK_NoOp || CE->getCastKind() == CK_LValueToRValue)
9683 return GetExprRange(C, CE->getSubExpr(), MaxWidth);
9684
9685 IntRange OutputTypeRange = IntRange::forValueOfType(C, GetExprType(CE));
9686
9687 bool isIntegerCast = CE->getCastKind() == CK_IntegralCast ||
9688 CE->getCastKind() == CK_BooleanToSignedIntegral;
9689
9690 // Assume that non-integer casts can span the full range of the type.
9691 if (!isIntegerCast)
9692 return OutputTypeRange;
9693
9694 IntRange SubRange
9695 = GetExprRange(C, CE->getSubExpr(),
9696 std::min(MaxWidth, OutputTypeRange.Width));
9697
9698 // Bail out if the subexpr's range is as wide as the cast type.
9699 if (SubRange.Width >= OutputTypeRange.Width)
9700 return OutputTypeRange;
9701
9702 // Otherwise, we take the smaller width, and we're non-negative if
9703 // either the output type or the subexpr is.
9704 return IntRange(SubRange.Width,
9705 SubRange.NonNegative || OutputTypeRange.NonNegative);
9706 }
9707
9708 if (const auto *CO = dyn_cast<ConditionalOperator>(E)) {
9709 // If we can fold the condition, just take that operand.
9710 bool CondResult;
9711 if (CO->getCond()->EvaluateAsBooleanCondition(CondResult, C))
9712 return GetExprRange(C, CondResult ? CO->getTrueExpr()
9713 : CO->getFalseExpr(),
9714 MaxWidth);
9715
9716 // Otherwise, conservatively merge.
9717 IntRange L = GetExprRange(C, CO->getTrueExpr(), MaxWidth);
9718 IntRange R = GetExprRange(C, CO->getFalseExpr(), MaxWidth);
9719 return IntRange::join(L, R);
9720 }
9721
9722 if (const auto *BO = dyn_cast<BinaryOperator>(E)) {
9723 switch (BO->getOpcode()) {
9724 case BO_Cmp:
9725 llvm_unreachable("builtin <=> should have class type");
9726
9727 // Boolean-valued operations are single-bit and positive.
9728 case BO_LAnd:
9729 case BO_LOr:
9730 case BO_LT:
9731 case BO_GT:
9732 case BO_LE:
9733 case BO_GE:
9734 case BO_EQ:
9735 case BO_NE:
9736 return IntRange::forBoolType();
9737
9738 // The type of the assignments is the type of the LHS, so the RHS
9739 // is not necessarily the same type.
9740 case BO_MulAssign:
9741 case BO_DivAssign:
9742 case BO_RemAssign:
9743 case BO_AddAssign:
9744 case BO_SubAssign:
9745 case BO_XorAssign:
9746 case BO_OrAssign:
9747 // TODO: bitfields?
9748 return IntRange::forValueOfType(C, GetExprType(E));
9749
9750 // Simple assignments just pass through the RHS, which will have
9751 // been coerced to the LHS type.
9752 case BO_Assign:
9753 // TODO: bitfields?
9754 return GetExprRange(C, BO->getRHS(), MaxWidth);
9755
9756 // Operations with opaque sources are black-listed.
9757 case BO_PtrMemD:
9758 case BO_PtrMemI:
9759 return IntRange::forValueOfType(C, GetExprType(E));
9760
9761 // Bitwise-and uses the *infinum* of the two source ranges.
9762 case BO_And:
9763 case BO_AndAssign:
9764 return IntRange::meet(GetExprRange(C, BO->getLHS(), MaxWidth),
9765 GetExprRange(C, BO->getRHS(), MaxWidth));
9766
9767 // Left shift gets black-listed based on a judgement call.
9768 case BO_Shl:
9769 // ...except that we want to treat '1 << (blah)' as logically
9770 // positive. It's an important idiom.
9771 if (IntegerLiteral *I
9772 = dyn_cast<IntegerLiteral>(BO->getLHS()->IgnoreParenCasts())) {
9773 if (I->getValue() == 1) {
9774 IntRange R = IntRange::forValueOfType(C, GetExprType(E));
9775 return IntRange(R.Width, /*NonNegative*/ true);
9776 }
9777 }
9778 LLVM_FALLTHROUGH;
9779
9780 case BO_ShlAssign:
9781 return IntRange::forValueOfType(C, GetExprType(E));
9782
9783 // Right shift by a constant can narrow its left argument.
9784 case BO_Shr:
9785 case BO_ShrAssign: {
9786 IntRange L = GetExprRange(C, BO->getLHS(), MaxWidth);
9787
9788 // If the shift amount is a positive constant, drop the width by
9789 // that much.
9790 llvm::APSInt shift;
9791 if (BO->getRHS()->isIntegerConstantExpr(shift, C) &&
9792 shift.isNonNegative()) {
9793 unsigned zext = shift.getZExtValue();
9794 if (zext >= L.Width)
9795 L.Width = (L.NonNegative ? 0 : 1);
9796 else
9797 L.Width -= zext;
9798 }
9799
9800 return L;
9801 }
9802
9803 // Comma acts as its right operand.
9804 case BO_Comma:
9805 return GetExprRange(C, BO->getRHS(), MaxWidth);
9806
9807 // Black-list pointer subtractions.
9808 case BO_Sub:
9809 if (BO->getLHS()->getType()->isPointerType())
9810 return IntRange::forValueOfType(C, GetExprType(E));
9811 break;
9812
9813 // The width of a division result is mostly determined by the size
9814 // of the LHS.
9815 case BO_Div: {
9816 // Don't 'pre-truncate' the operands.
9817 unsigned opWidth = C.getIntWidth(GetExprType(E));
9818 IntRange L = GetExprRange(C, BO->getLHS(), opWidth);
9819
9820 // If the divisor is constant, use that.
9821 llvm::APSInt divisor;
9822 if (BO->getRHS()->isIntegerConstantExpr(divisor, C)) {
9823 unsigned log2 = divisor.logBase2(); // floor(log_2(divisor))
9824 if (log2 >= L.Width)
9825 L.Width = (L.NonNegative ? 0 : 1);
9826 else
9827 L.Width = std::min(L.Width - log2, MaxWidth);
9828 return L;
9829 }
9830
9831 // Otherwise, just use the LHS's width.
9832 IntRange R = GetExprRange(C, BO->getRHS(), opWidth);
9833 return IntRange(L.Width, L.NonNegative && R.NonNegative);
9834 }
9835
9836 // The result of a remainder can't be larger than the result of
9837 // either side.
9838 case BO_Rem: {
9839 // Don't 'pre-truncate' the operands.
9840 unsigned opWidth = C.getIntWidth(GetExprType(E));
9841 IntRange L = GetExprRange(C, BO->getLHS(), opWidth);
9842 IntRange R = GetExprRange(C, BO->getRHS(), opWidth);
9843
9844 IntRange meet = IntRange::meet(L, R);
9845 meet.Width = std::min(meet.Width, MaxWidth);
9846 return meet;
9847 }
9848
9849 // The default behavior is okay for these.
9850 case BO_Mul:
9851 case BO_Add:
9852 case BO_Xor:
9853 case BO_Or:
9854 break;
9855 }
9856
9857 // The default case is to treat the operation as if it were closed
9858 // on the narrowest type that encompasses both operands.
9859 IntRange L = GetExprRange(C, BO->getLHS(), MaxWidth);
9860 IntRange R = GetExprRange(C, BO->getRHS(), MaxWidth);
9861 return IntRange::join(L, R);
9862 }
9863
9864 if (const auto *UO = dyn_cast<UnaryOperator>(E)) {
9865 switch (UO->getOpcode()) {
9866 // Boolean-valued operations are white-listed.
9867 case UO_LNot:
9868 return IntRange::forBoolType();
9869
9870 // Operations with opaque sources are black-listed.
9871 case UO_Deref:
9872 case UO_AddrOf: // should be impossible
9873 return IntRange::forValueOfType(C, GetExprType(E));
9874
9875 default:
9876 return GetExprRange(C, UO->getSubExpr(), MaxWidth);
9877 }
9878 }
9879
9880 if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E))
9881 return GetExprRange(C, OVE->getSourceExpr(), MaxWidth);
9882
9883 if (const auto *BitField = E->getSourceBitField())
9884 return IntRange(BitField->getBitWidthValue(C),
9885 BitField->getType()->isUnsignedIntegerOrEnumerationType());
9886
9887 return IntRange::forValueOfType(C, GetExprType(E));
9888 }
9889
9890 static IntRange GetExprRange(ASTContext &C, const Expr *E) {
9891 return GetExprRange(C, E, C.getIntWidth(GetExprType(E)));
9892 }
9893
9894 /// Checks whether the given value, which currently has the given
9895 /// source semantics, has the same value when coerced through the
9896 /// target semantics.
9897 static bool IsSameFloatAfterCast(const llvm::APFloat &value,
9898 const llvm::fltSemantics &Src,
9899 const llvm::fltSemantics &Tgt) {
9900 llvm::APFloat truncated = value;
9901
9902 bool ignored;
9903 truncated.convert(Src, llvm::APFloat::rmNearestTiesToEven, &ignored);
9904 truncated.convert(Tgt, llvm::APFloat::rmNearestTiesToEven, &ignored);
9905
9906 return truncated.bitwiseIsEqual(value);
9907 }
9908
9909 /// Checks whether the given value, which currently has the given
9910 /// source semantics, has the same value when coerced through the
9911 /// target semantics.
9912 ///
9913 /// The value might be a vector of floats (or a complex number).
9914 static bool IsSameFloatAfterCast(const APValue &value,
9915 const llvm::fltSemantics &Src,
9916 const llvm::fltSemantics &Tgt) {
9917 if (value.isFloat())
9918 return IsSameFloatAfterCast(value.getFloat(), Src, Tgt);
9919
9920 if (value.isVector()) {
9921 for (unsigned i = 0, e = value.getVectorLength(); i != e; ++i)
9922 if (!IsSameFloatAfterCast(value.getVectorElt(i), Src, Tgt))
9923 return false;
9924 return true;
9925 }
9926
9927 assert(value.isComplexFloat());
9928 return (IsSameFloatAfterCast(value.getComplexFloatReal(), Src, Tgt) &&
9929 IsSameFloatAfterCast(value.getComplexFloatImag(), Src, Tgt));
9930 }
9931
9932 static void AnalyzeImplicitConversions(Sema &S, Expr *E, SourceLocation CC);
9933
9934 static bool IsEnumConstOrFromMacro(Sema &S, Expr *E) {
9935 // Suppress cases where we are comparing against an enum constant.
9936 if (const DeclRefExpr *DR =
9937 dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()))
9938 if (isa<EnumConstantDecl>(DR->getDecl()))
9939 return true;
9940
9941 // Suppress cases where the '0' value is expanded from a macro.
9942 if (E->getBeginLoc().isMacroID())
9943 return true;
9944
9945 return false;
9946 }
9947
9948 static bool isKnownToHaveUnsignedValue(Expr *E) {
9949 return E->getType()->isIntegerType() &&
9950 (!E->getType()->isSignedIntegerType() ||
9951 !E->IgnoreParenImpCasts()->getType()->isSignedIntegerType());
9952 }
9953
9954 namespace {
9955 /// The promoted range of values of a type. In general this has the
9956 /// following structure:
9957 ///
9958 /// |-----------| . . . |-----------|
9959 /// ^ ^ ^ ^
9960 /// Min HoleMin HoleMax Max
9961 ///
9962 /// ... where there is only a hole if a signed type is promoted to unsigned
9963 /// (in which case Min and Max are the smallest and largest representable
9964 /// values).
9965 struct PromotedRange {
9966 // Min, or HoleMax if there is a hole.
9967 llvm::APSInt PromotedMin;
9968 // Max, or HoleMin if there is a hole.
9969 llvm::APSInt PromotedMax;
9970
9971 PromotedRange(IntRange R, unsigned BitWidth, bool Unsigned) {
9972 if (R.Width == 0)
9973 PromotedMin = PromotedMax = llvm::APSInt(BitWidth, Unsigned);
9974 else if (R.Width >= BitWidth && !Unsigned) {
9975 // Promotion made the type *narrower*. This happens when promoting
9976 // a < 32-bit unsigned / <= 32-bit signed bit-field to 'signed int'.
9977 // Treat all values of 'signed int' as being in range for now.
9978 PromotedMin = llvm::APSInt::getMinValue(BitWidth, Unsigned);
9979 PromotedMax = llvm::APSInt::getMaxValue(BitWidth, Unsigned);
9980 } else {
9981 PromotedMin = llvm::APSInt::getMinValue(R.Width, R.NonNegative)
9982 .extOrTrunc(BitWidth);
9983 PromotedMin.setIsUnsigned(Unsigned);
9984
9985 PromotedMax = llvm::APSInt::getMaxValue(R.Width, R.NonNegative)
9986 .extOrTrunc(BitWidth);
9987 PromotedMax.setIsUnsigned(Unsigned);
9988 }
9989 }
9990
9991 // Determine whether this range is contiguous (has no hole).
9992 bool isContiguous() const { return PromotedMin <= PromotedMax; }
9993
9994 // Where a constant value is within the range.
9995 enum ComparisonResult {
9996 LT = 0x1,
9997 LE = 0x2,
9998 GT = 0x4,
9999 GE = 0x8,
10000 EQ = 0x10,
10001 NE = 0x20,
10002 InRangeFlag = 0x40,
10003
10004 Less = LE | LT | NE,
10005 Min = LE | InRangeFlag,
10006 InRange = InRangeFlag,
10007 Max = GE | InRangeFlag,
10008 Greater = GE | GT | NE,
10009
10010 OnlyValue = LE | GE | EQ | InRangeFlag,
10011 InHole = NE
10012 };
10013
10014 ComparisonResult compare(const llvm::APSInt &Value) const {
10015 assert(Value.getBitWidth() == PromotedMin.getBitWidth() &&
10016 Value.isUnsigned() == PromotedMin.isUnsigned());
10017 if (!isContiguous()) {
10018 assert(Value.isUnsigned() && "discontiguous range for signed compare");
10019 if (Value.isMinValue()) return Min;
10020 if (Value.isMaxValue()) return Max;
10021 if (Value >= PromotedMin) return InRange;
10022 if (Value <= PromotedMax) return InRange;
10023 return InHole;
10024 }
10025
10026 switch (llvm::APSInt::compareValues(Value, PromotedMin)) {
10027 case -1: return Less;
10028 case 0: return PromotedMin == PromotedMax ? OnlyValue : Min;
10029 case 1:
10030 switch (llvm::APSInt::compareValues(Value, PromotedMax)) {
10031 case -1: return InRange;
10032 case 0: return Max;
10033 case 1: return Greater;
10034 }
10035 }
10036
10037 llvm_unreachable("impossible compare result");
10038 }
10039
10040 static llvm::Optional<StringRef>
10041 constantValue(BinaryOperatorKind Op, ComparisonResult R, bool ConstantOnRHS) {
10042 if (Op == BO_Cmp) {
10043 ComparisonResult LTFlag = LT, GTFlag = GT;
10044 if (ConstantOnRHS) std::swap(LTFlag, GTFlag);
10045
10046 if (R & EQ) return StringRef("'std::strong_ordering::equal'");
10047 if (R & LTFlag) return StringRef("'std::strong_ordering::less'");
10048 if (R & GTFlag) return StringRef("'std::strong_ordering::greater'");
10049 return llvm::None;
10050 }
10051
10052 ComparisonResult TrueFlag, FalseFlag;
10053 if (Op == BO_EQ) {
10054 TrueFlag = EQ;
10055 FalseFlag = NE;
10056 } else if (Op == BO_NE) {
10057 TrueFlag = NE;
10058 FalseFlag = EQ;
10059 } else {
10060 if ((Op == BO_LT || Op == BO_GE) ^ ConstantOnRHS) {
10061 TrueFlag = LT;
10062 FalseFlag = GE;
10063 } else {
10064 TrueFlag = GT;
10065 FalseFlag = LE;
10066 }
10067 if (Op == BO_GE || Op == BO_LE)
10068 std::swap(TrueFlag, FalseFlag);
10069 }
10070 if (R & TrueFlag)
10071 return StringRef("true");
10072 if (R & FalseFlag)
10073 return StringRef("false");
10074 return llvm::None;
10075 }
10076 };
10077 }
10078
10079 static bool HasEnumType(Expr *E) {
10080 // Strip off implicit integral promotions.
10081 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
10082 if (ICE->getCastKind() != CK_IntegralCast &&
10083 ICE->getCastKind() != CK_NoOp)
10084 break;
10085 E = ICE->getSubExpr();
10086 }
10087
10088 return E->getType()->isEnumeralType();
10089 }
10090
10091 static int classifyConstantValue(Expr *Constant) {
10092 // The values of this enumeration are used in the diagnostics
10093 // diag::warn_out_of_range_compare and diag::warn_tautological_bool_compare.
10094 enum ConstantValueKind {
10095 Miscellaneous = 0,
10096 LiteralTrue,
10097 LiteralFalse
10098 };
10099 if (auto *BL = dyn_cast<CXXBoolLiteralExpr>(Constant))
10100 return BL->getValue() ? ConstantValueKind::LiteralTrue
10101 : ConstantValueKind::LiteralFalse;
10102 return ConstantValueKind::Miscellaneous;
10103 }
10104
10105 static bool CheckTautologicalComparison(Sema &S, BinaryOperator *E,
10106 Expr *Constant, Expr *Other,
10107 const llvm::APSInt &Value,
10108 bool RhsConstant) {
10109 if (S.inTemplateInstantiation())
10110 return false;
10111
10112 Expr *OriginalOther = Other;
10113
10114 Constant = Constant->IgnoreParenImpCasts();
10115 Other = Other->IgnoreParenImpCasts();
10116
10117 // Suppress warnings on tautological comparisons between values of the same
10118 // enumeration type. There are only two ways we could warn on this:
10119 // - If the constant is outside the range of representable values of
10120 // the enumeration. In such a case, we should warn about the cast
10121 // to enumeration type, not about the comparison.
10122 // - If the constant is the maximum / minimum in-range value. For an
10123 // enumeratin type, such comparisons can be meaningful and useful.
10124 if (Constant->getType()->isEnumeralType() &&
10125 S.Context.hasSameUnqualifiedType(Constant->getType(), Other->getType()))
10126 return false;
10127
10128 // TODO: Investigate using GetExprRange() to get tighter bounds
10129 // on the bit ranges.
10130 QualType OtherT = Other->getType();
10131 if (const auto *AT = OtherT->getAs<AtomicType>())
10132 OtherT = AT->getValueType();
10133 IntRange OtherRange = IntRange::forValueOfType(S.Context, OtherT);
10134
10135 // Whether we're treating Other as being a bool because of the form of
10136 // expression despite it having another type (typically 'int' in C).
10137 bool OtherIsBooleanDespiteType =
10138 !OtherT->isBooleanType() && Other->isKnownToHaveBooleanValue();
10139 if (OtherIsBooleanDespiteType)
10140 OtherRange = IntRange::forBoolType();
10141
10142 // Determine the promoted range of the other type and see if a comparison of
10143 // the constant against that range is tautological.
10144 PromotedRange OtherPromotedRange(OtherRange, Value.getBitWidth(),
10145 Value.isUnsigned());
10146 auto Cmp = OtherPromotedRange.compare(Value);
10147 auto Result = PromotedRange::constantValue(E->getOpcode(), Cmp, RhsConstant);
10148 if (!Result)
10149 return false;
10150
10151 // Suppress the diagnostic for an in-range comparison if the constant comes
10152 // from a macro or enumerator. We don't want to diagnose
10153 //
10154 // some_long_value <= INT_MAX
10155 //
10156 // when sizeof(int) == sizeof(long).
10157 bool InRange = Cmp & PromotedRange::InRangeFlag;
10158 if (InRange && IsEnumConstOrFromMacro(S, Constant))
10159 return false;
10160
10161 // If this is a comparison to an enum constant, include that
10162 // constant in the diagnostic.
10163 const EnumConstantDecl *ED = nullptr;
10164 if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(Constant))
10165 ED = dyn_cast<EnumConstantDecl>(DR->getDecl());
10166
10167 // Should be enough for uint128 (39 decimal digits)
10168 SmallString<64> PrettySourceValue;
10169 llvm::raw_svector_ostream OS(PrettySourceValue);
10170 if (ED)
10171 OS << '\'' << *ED << "' (" << Value << ")";
10172 else
10173 OS << Value;
10174
10175 // FIXME: We use a somewhat different formatting for the in-range cases and
10176 // cases involving boolean values for historical reasons. We should pick a
10177 // consistent way of presenting these diagnostics.
10178 if (!InRange || Other->isKnownToHaveBooleanValue()) {
10179 S.DiagRuntimeBehavior(
10180 E->getOperatorLoc(), E,
10181 S.PDiag(!InRange ? diag::warn_out_of_range_compare
10182 : diag::warn_tautological_bool_compare)
10183 << OS.str() << classifyConstantValue(Constant)
10184 << OtherT << OtherIsBooleanDespiteType << *Result
10185 << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange());
10186 } else {
10187 unsigned Diag = (isKnownToHaveUnsignedValue(OriginalOther) && Value == 0)
10188 ? (HasEnumType(OriginalOther)
10189 ? diag::warn_unsigned_enum_always_true_comparison
10190 : diag::warn_unsigned_always_true_comparison)
10191 : diag::warn_tautological_constant_compare;
10192
10193 S.Diag(E->getOperatorLoc(), Diag)
10194 << RhsConstant << OtherT << E->getOpcodeStr() << OS.str() << *Result
10195 << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
10196 }
10197
10198 return true;
10199 }
10200
10201 /// Analyze the operands of the given comparison. Implements the
10202 /// fallback case from AnalyzeComparison.
10203 static void AnalyzeImpConvsInComparison(Sema &S, BinaryOperator *E) {
10204 AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
10205 AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
10206 }
10207
10208 /// Implements -Wsign-compare.
10209 ///
10210 /// \param E the binary operator to check for warnings
10211 static void AnalyzeComparison(Sema &S, BinaryOperator *E) {
10212 // The type the comparison is being performed in.
10213 QualType T = E->getLHS()->getType();
10214
10215 // Only analyze comparison operators where both sides have been converted to
10216 // the same type.
10217 if (!S.Context.hasSameUnqualifiedType(T, E->getRHS()->getType()))
10218 return AnalyzeImpConvsInComparison(S, E);
10219
10220 // Don't analyze value-dependent comparisons directly.
10221 if (E->isValueDependent())
10222 return AnalyzeImpConvsInComparison(S, E);
10223
10224 Expr *LHS = E->getLHS();
10225 Expr *RHS = E->getRHS();
10226
10227 if (T->isIntegralType(S.Context)) {
10228 llvm::APSInt RHSValue;
10229 llvm::APSInt LHSValue;
10230
10231 bool IsRHSIntegralLiteral = RHS->isIntegerConstantExpr(RHSValue, S.Context);
10232 bool IsLHSIntegralLiteral = LHS->isIntegerConstantExpr(LHSValue, S.Context);
10233
10234 // We don't care about expressions whose result is a constant.
10235 if (IsRHSIntegralLiteral && IsLHSIntegralLiteral)
10236 return AnalyzeImpConvsInComparison(S, E);
10237
10238 // We only care about expressions where just one side is literal
10239 if (IsRHSIntegralLiteral ^ IsLHSIntegralLiteral) {
10240 // Is the constant on the RHS or LHS?
10241 const bool RhsConstant = IsRHSIntegralLiteral;
10242 Expr *Const = RhsConstant ? RHS : LHS;
10243 Expr *Other = RhsConstant ? LHS : RHS;
10244 const llvm::APSInt &Value = RhsConstant ? RHSValue : LHSValue;
10245
10246 // Check whether an integer constant comparison results in a value
10247 // of 'true' or 'false'.
10248 if (CheckTautologicalComparison(S, E, Const, Other, Value, RhsConstant))
10249 return AnalyzeImpConvsInComparison(S, E);
10250 }
10251 }
10252
10253 if (!T->hasUnsignedIntegerRepresentation()) {
10254 // We don't do anything special if this isn't an unsigned integral
10255 // comparison: we're only interested in integral comparisons, and
10256 // signed comparisons only happen in cases we don't care to warn about.
10257 return AnalyzeImpConvsInComparison(S, E);
10258 }
10259
10260 LHS = LHS->IgnoreParenImpCasts();
10261 RHS = RHS->IgnoreParenImpCasts();
10262
10263 if (!S.getLangOpts().CPlusPlus) {
10264 // Avoid warning about comparison of integers with different signs when
10265 // RHS/LHS has a `typeof(E)` type whose sign is different from the sign of
10266 // the type of `E`.
10267 if (const auto *TET = dyn_cast<TypeOfExprType>(LHS->getType()))
10268 LHS = TET->getUnderlyingExpr()->IgnoreParenImpCasts();
10269 if (const auto *TET = dyn_cast<TypeOfExprType>(RHS->getType()))
10270 RHS = TET->getUnderlyingExpr()->IgnoreParenImpCasts();
10271 }
10272
10273 // Check to see if one of the (unmodified) operands is of different
10274 // signedness.
10275 Expr *signedOperand, *unsignedOperand;
10276 if (LHS->getType()->hasSignedIntegerRepresentation()) {
10277 assert(!RHS->getType()->hasSignedIntegerRepresentation() &&
10278 "unsigned comparison between two signed integer expressions?");
10279 signedOperand = LHS;
10280 unsignedOperand = RHS;
10281 } else if (RHS->getType()->hasSignedIntegerRepresentation()) {
10282 signedOperand = RHS;
10283 unsignedOperand = LHS;
10284 } else {
10285 return AnalyzeImpConvsInComparison(S, E);
10286 }
10287
10288 // Otherwise, calculate the effective range of the signed operand.
10289 IntRange signedRange = GetExprRange(S.Context, signedOperand);
10290
10291 // Go ahead and analyze implicit conversions in the operands. Note
10292 // that we skip the implicit conversions on both sides.
10293 AnalyzeImplicitConversions(S, LHS, E->getOperatorLoc());
10294 AnalyzeImplicitConversions(S, RHS, E->getOperatorLoc());
10295
10296 // If the signed range is non-negative, -Wsign-compare won't fire.
10297 if (signedRange.NonNegative)
10298 return;
10299
10300 // For (in)equality comparisons, if the unsigned operand is a
10301 // constant which cannot collide with a overflowed signed operand,
10302 // then reinterpreting the signed operand as unsigned will not
10303 // change the result of the comparison.
10304 if (E->isEqualityOp()) {
10305 unsigned comparisonWidth = S.Context.getIntWidth(T);
10306 IntRange unsignedRange = GetExprRange(S.Context, unsignedOperand);
10307
10308 // We should never be unable to prove that the unsigned operand is
10309 // non-negative.
10310 assert(unsignedRange.NonNegative && "unsigned range includes negative?");
10311
10312 if (unsignedRange.Width < comparisonWidth)
10313 return;
10314 }
10315
10316 S.DiagRuntimeBehavior(E->getOperatorLoc(), E,
10317 S.PDiag(diag::warn_mixed_sign_comparison)
10318 << LHS->getType() << RHS->getType()
10319 << LHS->getSourceRange() << RHS->getSourceRange());
10320 }
10321
10322 /// Analyzes an attempt to assign the given value to a bitfield.
10323 ///
10324 /// Returns true if there was something fishy about the attempt.
10325 static bool AnalyzeBitFieldAssignment(Sema &S, FieldDecl *Bitfield, Expr *Init,
10326 SourceLocation InitLoc) {
10327 assert(Bitfield->isBitField());
10328 if (Bitfield->isInvalidDecl())
10329 return false;
10330
10331 // White-list bool bitfields.
10332 QualType BitfieldType = Bitfield->getType();
10333 if (BitfieldType->isBooleanType())
10334 return false;
10335
10336 if (BitfieldType->isEnumeralType()) {
10337 EnumDecl *BitfieldEnumDecl = BitfieldType->getAs<EnumType>()->getDecl();
10338 // If the underlying enum type was not explicitly specified as an unsigned
10339 // type and the enum contain only positive values, MSVC++ will cause an
10340 // inconsistency by storing this as a signed type.
10341 if (S.getLangOpts().CPlusPlus11 &&
10342 !BitfieldEnumDecl->getIntegerTypeSourceInfo() &&
10343 BitfieldEnumDecl->getNumPositiveBits() > 0 &&
10344 BitfieldEnumDecl->getNumNegativeBits() == 0) {
10345 S.Diag(InitLoc, diag::warn_no_underlying_type_specified_for_enum_bitfield)
10346 << BitfieldEnumDecl->getNameAsString();
10347 }
10348 }
10349
10350 if (Bitfield->getType()->isBooleanType())
10351 return false;
10352
10353 // Ignore value- or type-dependent expressions.
10354 if (Bitfield->getBitWidth()->isValueDependent() ||
10355 Bitfield->getBitWidth()->isTypeDependent() ||
10356 Init->isValueDependent() ||
10357 Init->isTypeDependent())
10358 return false;
10359
10360 Expr *OriginalInit = Init->IgnoreParenImpCasts();
10361 unsigned FieldWidth = Bitfield->getBitWidthValue(S.Context);
10362
10363 Expr::EvalResult Result;
10364 if (!OriginalInit->EvaluateAsInt(Result, S.Context,
10365 Expr::SE_AllowSideEffects)) {
10366 // The RHS is not constant. If the RHS has an enum type, make sure the
10367 // bitfield is wide enough to hold all the values of the enum without
10368 // truncation.
10369 if (const auto *EnumTy = OriginalInit->getType()->getAs<EnumType>()) {
10370 EnumDecl *ED = EnumTy->getDecl();
10371 bool SignedBitfield = BitfieldType->isSignedIntegerType();
10372
10373 // Enum types are implicitly signed on Windows, so check if there are any
10374 // negative enumerators to see if the enum was intended to be signed or
10375 // not.
10376 bool SignedEnum = ED->getNumNegativeBits() > 0;
10377
10378 // Check for surprising sign changes when assigning enum values to a
10379 // bitfield of different signedness. If the bitfield is signed and we
10380 // have exactly the right number of bits to store this unsigned enum,
10381 // suggest changing the enum to an unsigned type. This typically happens
10382 // on Windows where unfixed enums always use an underlying type of 'int'.
10383 unsigned DiagID = 0;
10384 if (SignedEnum && !SignedBitfield) {
10385 DiagID = diag::warn_unsigned_bitfield_assigned_signed_enum;
10386 } else if (SignedBitfield && !SignedEnum &&
10387 ED->getNumPositiveBits() == FieldWidth) {
10388 DiagID = diag::warn_signed_bitfield_enum_conversion;
10389 }
10390
10391 if (DiagID) {
10392 S.Diag(InitLoc, DiagID) << Bitfield << ED;
10393 TypeSourceInfo *TSI = Bitfield->getTypeSourceInfo();
10394 SourceRange TypeRange =
10395 TSI ? TSI->getTypeLoc().getSourceRange() : SourceRange();
10396 S.Diag(Bitfield->getTypeSpecStartLoc(), diag::note_change_bitfield_sign)
10397 << SignedEnum << TypeRange;
10398 }
10399
10400 // Compute the required bitwidth. If the enum has negative values, we need
10401 // one more bit than the normal number of positive bits to represent the
10402 // sign bit.
10403 unsigned BitsNeeded = SignedEnum ? std::max(ED->getNumPositiveBits() + 1,
10404 ED->getNumNegativeBits())
10405 : ED->getNumPositiveBits();
10406
10407 // Check the bitwidth.
10408 if (BitsNeeded > FieldWidth) {
10409 Expr *WidthExpr = Bitfield->getBitWidth();
10410 S.Diag(InitLoc, diag::warn_bitfield_too_small_for_enum)
10411 << Bitfield << ED;
10412 S.Diag(WidthExpr->getExprLoc(), diag::note_widen_bitfield)
10413 << BitsNeeded << ED << WidthExpr->getSourceRange();
10414 }
10415 }
10416
10417 return false;
10418 }
10419
10420 llvm::APSInt Value = Result.Val.getInt();
10421
10422 unsigned OriginalWidth = Value.getBitWidth();
10423
10424 if (!Value.isSigned() || Value.isNegative())
10425 if (UnaryOperator *UO = dyn_cast<UnaryOperator>(OriginalInit))
10426 if (UO->getOpcode() == UO_Minus || UO->getOpcode() == UO_Not)
10427 OriginalWidth = Value.getMinSignedBits();
10428
10429 if (OriginalWidth <= FieldWidth)
10430 return false;
10431
10432 // Compute the value which the bitfield will contain.
10433 llvm::APSInt TruncatedValue = Value.trunc(FieldWidth);
10434 TruncatedValue.setIsSigned(BitfieldType->isSignedIntegerType());
10435
10436 // Check whether the stored value is equal to the original value.
10437 TruncatedValue = TruncatedValue.extend(OriginalWidth);
10438 if (llvm::APSInt::isSameValue(Value, TruncatedValue))
10439 return false;
10440
10441 // Special-case bitfields of width 1: booleans are naturally 0/1, and
10442 // therefore don't strictly fit into a signed bitfield of width 1.
10443 if (FieldWidth == 1 && Value == 1)
10444 return false;
10445
10446 std::string PrettyValue = Value.toString(10);
10447 std::string PrettyTrunc = TruncatedValue.toString(10);
10448
10449 S.Diag(InitLoc, diag::warn_impcast_bitfield_precision_constant)
10450 << PrettyValue << PrettyTrunc << OriginalInit->getType()
10451 << Init->getSourceRange();
10452
10453 return true;
10454 }
10455
10456 /// Analyze the given simple or compound assignment for warning-worthy
10457 /// operations.
10458 static void AnalyzeAssignment(Sema &S, BinaryOperator *E) {
10459 // Just recurse on the LHS.
10460 AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
10461
10462 // We want to recurse on the RHS as normal unless we're assigning to
10463 // a bitfield.
10464 if (FieldDecl *Bitfield = E->getLHS()->getSourceBitField()) {
10465 if (AnalyzeBitFieldAssignment(S, Bitfield, E->getRHS(),
10466 E->getOperatorLoc())) {
10467 // Recurse, ignoring any implicit conversions on the RHS.
10468 return AnalyzeImplicitConversions(S, E->getRHS()->IgnoreParenImpCasts(),
10469 E->getOperatorLoc());
10470 }
10471 }
10472
10473 AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
10474
10475 // Diagnose implicitly sequentially-consistent atomic assignment.
10476 if (E->getLHS()->getType()->isAtomicType())
10477 S.Diag(E->getRHS()->getBeginLoc(), diag::warn_atomic_implicit_seq_cst);
10478 }
10479
10480 /// Diagnose an implicit cast; purely a helper for CheckImplicitConversion.
10481 static void DiagnoseImpCast(Sema &S, Expr *E, QualType SourceType, QualType T,
10482 SourceLocation CContext, unsigned diag,
10483 bool pruneControlFlow = false) {
10484 if (pruneControlFlow) {
10485 S.DiagRuntimeBehavior(E->getExprLoc(), E,
10486 S.PDiag(diag)
10487 << SourceType << T << E->getSourceRange()
10488 << SourceRange(CContext));
10489 return;
10490 }
10491 S.Diag(E->getExprLoc(), diag)
10492 << SourceType << T << E->getSourceRange() << SourceRange(CContext);
10493 }
10494
10495 /// Diagnose an implicit cast; purely a helper for CheckImplicitConversion.
10496 static void DiagnoseImpCast(Sema &S, Expr *E, QualType T,
10497 SourceLocation CContext,
10498 unsigned diag, bool pruneControlFlow = false) {
10499 DiagnoseImpCast(S, E, E->getType(), T, CContext, diag, pruneControlFlow);
10500 }
10501
10502 /// Diagnose an implicit cast from a floating point value to an integer value.
10503 static void DiagnoseFloatingImpCast(Sema &S, Expr *E, QualType T,
10504 SourceLocation CContext) {
10505 const bool IsBool = T->isSpecificBuiltinType(BuiltinType::Bool);
10506 const bool PruneWarnings = S.inTemplateInstantiation();
10507
10508 Expr *InnerE = E->IgnoreParenImpCasts();
10509 // We also want to warn on, e.g., "int i = -1.234"
10510 if (UnaryOperator *UOp = dyn_cast<UnaryOperator>(InnerE))
10511 if (UOp->getOpcode() == UO_Minus || UOp->getOpcode() == UO_Plus)
10512 InnerE = UOp->getSubExpr()->IgnoreParenImpCasts();
10513
10514 const bool IsLiteral =
10515 isa<FloatingLiteral>(E) || isa<FloatingLiteral>(InnerE);
10516
10517 llvm::APFloat Value(0.0);
10518 bool IsConstant =
10519 E->EvaluateAsFloat(Value, S.Context, Expr::SE_AllowSideEffects);
10520 if (!IsConstant) {
10521 return DiagnoseImpCast(S, E, T, CContext,
10522 diag::warn_impcast_float_integer, PruneWarnings);
10523 }
10524
10525 bool isExact = false;
10526
10527 llvm::APSInt IntegerValue(S.Context.getIntWidth(T),
10528 T->hasUnsignedIntegerRepresentation());
10529 llvm::APFloat::opStatus Result = Value.convertToInteger(
10530 IntegerValue, llvm::APFloat::rmTowardZero, &isExact);
10531
10532 if (Result == llvm::APFloat::opOK && isExact) {
10533 if (IsLiteral) return;
10534 return DiagnoseImpCast(S, E, T, CContext, diag::warn_impcast_float_integer,
10535 PruneWarnings);
10536 }
10537
10538 // Conversion of a floating-point value to a non-bool integer where the
10539 // integral part cannot be represented by the integer type is undefined.
10540 if (!IsBool && Result == llvm::APFloat::opInvalidOp)
10541 return DiagnoseImpCast(
10542 S, E, T, CContext,
10543 IsLiteral ? diag::warn_impcast_literal_float_to_integer_out_of_range
10544 : diag::warn_impcast_float_to_integer_out_of_range,
10545 PruneWarnings);
10546
10547 unsigned DiagID = 0;
10548 if (IsLiteral) {
10549 // Warn on floating point literal to integer.
10550 DiagID = diag::warn_impcast_literal_float_to_integer;
10551 } else if (IntegerValue == 0) {
10552 if (Value.isZero()) { // Skip -0.0 to 0 conversion.
10553 return DiagnoseImpCast(S, E, T, CContext,
10554 diag::warn_impcast_float_integer, PruneWarnings);
10555 }
10556 // Warn on non-zero to zero conversion.
10557 DiagID = diag::warn_impcast_float_to_integer_zero;
10558 } else {
10559 if (IntegerValue.isUnsigned()) {
10560 if (!IntegerValue.isMaxValue()) {
10561 return DiagnoseImpCast(S, E, T, CContext,
10562 diag::warn_impcast_float_integer, PruneWarnings);
10563 }
10564 } else { // IntegerValue.isSigned()
10565 if (!IntegerValue.isMaxSignedValue() &&
10566 !IntegerValue.isMinSignedValue()) {
10567 return DiagnoseImpCast(S, E, T, CContext,
10568 diag::warn_impcast_float_integer, PruneWarnings);
10569 }
10570 }
10571 // Warn on evaluatable floating point expression to integer conversion.
10572 DiagID = diag::warn_impcast_float_to_integer;
10573 }
10574
10575 // FIXME: Force the precision of the source value down so we don't print
10576 // digits which are usually useless (we don't really care here if we
10577 // truncate a digit by accident in edge cases). Ideally, APFloat::toString
10578 // would automatically print the shortest representation, but it's a bit
10579 // tricky to implement.
10580 SmallString<16> PrettySourceValue;
10581 unsigned precision = llvm::APFloat::semanticsPrecision(Value.getSemantics());
10582 precision = (precision * 59 + 195) / 196;
10583 Value.toString(PrettySourceValue, precision);
10584
10585 SmallString<16> PrettyTargetValue;
10586 if (IsBool)
10587 PrettyTargetValue = Value.isZero() ? "false" : "true";
10588 else
10589 IntegerValue.toString(PrettyTargetValue);
10590
10591 if (PruneWarnings) {
10592 S.DiagRuntimeBehavior(E->getExprLoc(), E,
10593 S.PDiag(DiagID)
10594 << E->getType() << T.getUnqualifiedType()
10595 << PrettySourceValue << PrettyTargetValue
10596 << E->getSourceRange() << SourceRange(CContext));
10597 } else {
10598 S.Diag(E->getExprLoc(), DiagID)
10599 << E->getType() << T.getUnqualifiedType() << PrettySourceValue
10600 << PrettyTargetValue << E->getSourceRange() << SourceRange(CContext);
10601 }
10602 }
10603
10604 /// Analyze the given compound assignment for the possible losing of
10605 /// floating-point precision.
10606 static void AnalyzeCompoundAssignment(Sema &S, BinaryOperator *E) {
10607 assert(isa<CompoundAssignOperator>(E) &&
10608 "Must be compound assignment operation");
10609 // Recurse on the LHS and RHS in here
10610 AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
10611 AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
10612
10613 if (E->getLHS()->getType()->isAtomicType())
10614 S.Diag(E->getOperatorLoc(), diag::warn_atomic_implicit_seq_cst);
10615
10616 // Now check the outermost expression
10617 const auto *ResultBT = E->getLHS()->getType()->getAs<BuiltinType>();
10618 const auto *RBT = cast<CompoundAssignOperator>(E)
10619 ->getComputationResultType()
10620 ->getAs<BuiltinType>();
10621
10622 // The below checks assume source is floating point.
10623 if (!ResultBT || !RBT || !RBT->isFloatingPoint()) return;
10624
10625 // If source is floating point but target is not.
10626 if (!ResultBT->isFloatingPoint())
10627 return DiagnoseFloatingImpCast(S, E, E->getRHS()->getType(),
10628 E->getExprLoc());
10629
10630 // If both source and target are floating points.
10631 // Builtin FP kinds are ordered by increasing FP rank.
10632 if (ResultBT->getKind() < RBT->getKind() &&
10633 // We don't want to warn for system macro.
10634 !S.SourceMgr.isInSystemMacro(E->getOperatorLoc()))
10635 // warn about dropping FP rank.
10636 DiagnoseImpCast(S, E->getRHS(), E->getLHS()->getType(), E->getOperatorLoc(),
10637 diag::warn_impcast_float_result_precision);
10638 }
10639
10640 static std::string PrettyPrintInRange(const llvm::APSInt &Value,
10641 IntRange Range) {
10642 if (!Range.Width) return "0";
10643
10644 llvm::APSInt ValueInRange = Value;
10645 ValueInRange.setIsSigned(!Range.NonNegative);
10646 ValueInRange = ValueInRange.trunc(Range.Width);
10647 return ValueInRange.toString(10);
10648 }
10649
10650 static bool IsImplicitBoolFloatConversion(Sema &S, Expr *Ex, bool ToBool) {
10651 if (!isa<ImplicitCastExpr>(Ex))
10652 return false;
10653
10654 Expr *InnerE = Ex->IgnoreParenImpCasts();
10655 const Type *Target = S.Context.getCanonicalType(Ex->getType()).getTypePtr();
10656 const Type *Source =
10657 S.Context.getCanonicalType(InnerE->getType()).getTypePtr();
10658 if (Target->isDependentType())
10659 return false;
10660
10661 const BuiltinType *FloatCandidateBT =
10662 dyn_cast<BuiltinType>(ToBool ? Source : Target);
10663 const Type *BoolCandidateType = ToBool ? Target : Source;
10664
10665 return (BoolCandidateType->isSpecificBuiltinType(BuiltinType::Bool) &&
10666 FloatCandidateBT && (FloatCandidateBT->isFloatingPoint()));
10667 }
10668
10669 static void CheckImplicitArgumentConversions(Sema &S, CallExpr *TheCall,
10670 SourceLocation CC) {
10671 unsigned NumArgs = TheCall->getNumArgs();
10672 for (unsigned i = 0; i < NumArgs; ++i) {
10673 Expr *CurrA = TheCall->getArg(i);
10674 if (!IsImplicitBoolFloatConversion(S, CurrA, true))
10675 continue;
10676
10677 bool IsSwapped = ((i > 0) &&
10678 IsImplicitBoolFloatConversion(S, TheCall->getArg(i - 1), false));
10679 IsSwapped |= ((i < (NumArgs - 1)) &&
10680 IsImplicitBoolFloatConversion(S, TheCall->getArg(i + 1), false));
10681 if (IsSwapped) {
10682 // Warn on this floating-point to bool conversion.
10683 DiagnoseImpCast(S, CurrA->IgnoreParenImpCasts(),
10684 CurrA->getType(), CC,
10685 diag::warn_impcast_floating_point_to_bool);
10686 }
10687 }
10688 }
10689
10690 static void DiagnoseNullConversion(Sema &S, Expr *E, QualType T,
10691 SourceLocation CC) {
10692 if (S.Diags.isIgnored(diag::warn_impcast_null_pointer_to_integer,
10693 E->getExprLoc()))
10694 return;
10695
10696 // Don't warn on functions which have return type nullptr_t.
10697 if (isa<CallExpr>(E))
10698 return;
10699
10700 // Check for NULL (GNUNull) or nullptr (CXX11_nullptr).
10701 const Expr::NullPointerConstantKind NullKind =
10702 E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull);
10703 if (NullKind != Expr::NPCK_GNUNull && NullKind != Expr::NPCK_CXX11_nullptr)
10704 return;
10705
10706 // Return if target type is a safe conversion.
10707 if (T->isAnyPointerType() || T->isBlockPointerType() ||
10708 T->isMemberPointerType() || !T->isScalarType() || T->isNullPtrType())
10709 return;
10710
10711 SourceLocation Loc = E->getSourceRange().getBegin();
10712
10713 // Venture through the macro stacks to get to the source of macro arguments.
10714 // The new location is a better location than the complete location that was
10715 // passed in.
10716 Loc = S.SourceMgr.getTopMacroCallerLoc(Loc);
10717 CC = S.SourceMgr.getTopMacroCallerLoc(CC);
10718
10719 // __null is usually wrapped in a macro. Go up a macro if that is the case.
10720 if (NullKind == Expr::NPCK_GNUNull && Loc.isMacroID()) {
10721 StringRef MacroName = Lexer::getImmediateMacroNameForDiagnostics(
10722 Loc, S.SourceMgr, S.getLangOpts());
10723 if (MacroName == "NULL")
10724 Loc = S.SourceMgr.getImmediateExpansionRange(Loc).getBegin();
10725 }
10726
10727 // Only warn if the null and context location are in the same macro expansion.
10728 if (S.SourceMgr.getFileID(Loc) != S.SourceMgr.getFileID(CC))
10729 return;
10730
10731 S.Diag(Loc, diag::warn_impcast_null_pointer_to_integer)
10732 << (NullKind == Expr::NPCK_CXX11_nullptr) << T << SourceRange(CC)
10733 << FixItHint::CreateReplacement(Loc,
10734 S.getFixItZeroLiteralForType(T, Loc));
10735 }
10736
10737 static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
10738 ObjCArrayLiteral *ArrayLiteral);
10739
10740 static void
10741 checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
10742 ObjCDictionaryLiteral *DictionaryLiteral);
10743
10744 /// Check a single element within a collection literal against the
10745 /// target element type.
10746 static void checkObjCCollectionLiteralElement(Sema &S,
10747 QualType TargetElementType,
10748 Expr *Element,
10749 unsigned ElementKind) {
10750 // Skip a bitcast to 'id' or qualified 'id'.
10751 if (auto ICE = dyn_cast<ImplicitCastExpr>(Element)) {
10752 if (ICE->getCastKind() == CK_BitCast &&
10753 ICE->getSubExpr()->getType()->getAs<ObjCObjectPointerType>())
10754 Element = ICE->getSubExpr();
10755 }
10756
10757 QualType ElementType = Element->getType();
10758 ExprResult ElementResult(Element);
10759 if (ElementType->getAs<ObjCObjectPointerType>() &&
10760 S.CheckSingleAssignmentConstraints(TargetElementType,
10761 ElementResult,
10762 false, false)
10763 != Sema::Compatible) {
10764 S.Diag(Element->getBeginLoc(), diag::warn_objc_collection_literal_element)
10765 << ElementType << ElementKind << TargetElementType
10766 << Element->getSourceRange();
10767 }
10768
10769 if (auto ArrayLiteral = dyn_cast<ObjCArrayLiteral>(Element))
10770 checkObjCArrayLiteral(S, TargetElementType, ArrayLiteral);
10771 else if (auto DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(Element))
10772 checkObjCDictionaryLiteral(S, TargetElementType, DictionaryLiteral);
10773 }
10774
10775 /// Check an Objective-C array literal being converted to the given
10776 /// target type.
10777 static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
10778 ObjCArrayLiteral *ArrayLiteral) {
10779 if (!S.NSArrayDecl)
10780 return;
10781
10782 const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
10783 if (!TargetObjCPtr)
10784 return;
10785
10786 if (TargetObjCPtr->isUnspecialized() ||
10787 TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
10788 != S.NSArrayDecl->getCanonicalDecl())
10789 return;
10790
10791 auto TypeArgs = TargetObjCPtr->getTypeArgs();
10792 if (TypeArgs.size() != 1)
10793 return;
10794
10795 QualType TargetElementType = TypeArgs[0];
10796 for (unsigned I = 0, N = ArrayLiteral->getNumElements(); I != N; ++I) {
10797 checkObjCCollectionLiteralElement(S, TargetElementType,
10798 ArrayLiteral->getElement(I),
10799 0);
10800 }
10801 }
10802
10803 /// Check an Objective-C dictionary literal being converted to the given
10804 /// target type.
10805 static void
10806 checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
10807 ObjCDictionaryLiteral *DictionaryLiteral) {
10808 if (!S.NSDictionaryDecl)
10809 return;
10810
10811 const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
10812 if (!TargetObjCPtr)
10813 return;
10814
10815 if (TargetObjCPtr->isUnspecialized() ||
10816 TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
10817 != S.NSDictionaryDecl->getCanonicalDecl())
10818 return;
10819
10820 auto TypeArgs = TargetObjCPtr->getTypeArgs();
10821 if (TypeArgs.size() != 2)
10822 return;
10823
10824 QualType TargetKeyType = TypeArgs[0];
10825 QualType TargetObjectType = TypeArgs[1];
10826 for (unsigned I = 0, N = DictionaryLiteral->getNumElements(); I != N; ++I) {
10827 auto Element = DictionaryLiteral->getKeyValueElement(I);
10828 checkObjCCollectionLiteralElement(S, TargetKeyType, Element.Key, 1);
10829 checkObjCCollectionLiteralElement(S, TargetObjectType, Element.Value, 2);
10830 }
10831 }
10832
10833 // Helper function to filter out cases for constant width constant conversion.
10834 // Don't warn on char array initialization or for non-decimal values.
10835 static bool isSameWidthConstantConversion(Sema &S, Expr *E, QualType T,
10836 SourceLocation CC) {
10837 // If initializing from a constant, and the constant starts with '0',
10838 // then it is a binary, octal, or hexadecimal. Allow these constants
10839 // to fill all the bits, even if there is a sign change.
10840 if (auto *IntLit = dyn_cast<IntegerLiteral>(E->IgnoreParenImpCasts())) {
10841 const char FirstLiteralCharacter =
10842 S.getSourceManager().getCharacterData(IntLit->getBeginLoc())[0];
10843 if (FirstLiteralCharacter == '0')
10844 return false;
10845 }
10846
10847 // If the CC location points to a '{', and the type is char, then assume
10848 // assume it is an array initialization.
10849 if (CC.isValid() && T->isCharType()) {
10850 const char FirstContextCharacter =
10851 S.getSourceManager().getCharacterData(CC)[0];
10852 if (FirstContextCharacter == '{')
10853 return false;
10854 }
10855
10856 return true;
10857 }
10858
10859 static void
10860 CheckImplicitConversion(Sema &S, Expr *E, QualType T, SourceLocation CC,
10861 bool *ICContext = nullptr) {
10862 if (E->isTypeDependent() || E->isValueDependent()) return;
10863
10864 const Type *Source = S.Context.getCanonicalType(E->getType()).getTypePtr();
10865 const Type *Target = S.Context.getCanonicalType(T).getTypePtr();
10866 if (Source == Target) return;
10867 if (Target->isDependentType()) return;
10868
10869 // If the conversion context location is invalid don't complain. We also
10870 // don't want to emit a warning if the issue occurs from the expansion of
10871 // a system macro. The problem is that 'getSpellingLoc()' is slow, so we
10872 // delay this check as long as possible. Once we detect we are in that
10873 // scenario, we just return.
10874 if (CC.isInvalid())
10875 return;
10876
10877 if (Source->isAtomicType())
10878 S.Diag(E->getExprLoc(), diag::warn_atomic_implicit_seq_cst);
10879
10880 // Diagnose implicit casts to bool.
10881 if (Target->isSpecificBuiltinType(BuiltinType::Bool)) {
10882 if (isa<StringLiteral>(E))
10883 // Warn on string literal to bool. Checks for string literals in logical
10884 // and expressions, for instance, assert(0 && "error here"), are
10885 // prevented by a check in AnalyzeImplicitConversions().
10886 return DiagnoseImpCast(S, E, T, CC,
10887 diag::warn_impcast_string_literal_to_bool);
10888 if (isa<ObjCStringLiteral>(E) || isa<ObjCArrayLiteral>(E) ||
10889 isa<ObjCDictionaryLiteral>(E) || isa<ObjCBoxedExpr>(E)) {
10890 // This covers the literal expressions that evaluate to Objective-C
10891 // objects.
10892 return DiagnoseImpCast(S, E, T, CC,
10893 diag::warn_impcast_objective_c_literal_to_bool);
10894 }
10895 if (Source->isPointerType() || Source->canDecayToPointerType()) {
10896 // Warn on pointer to bool conversion that is always true.
10897 S.DiagnoseAlwaysNonNullPointer(E, Expr::NPCK_NotNull, /*IsEqual*/ false,
10898 SourceRange(CC));
10899 }
10900 }
10901
10902 // Check implicit casts from Objective-C collection literals to specialized
10903 // collection types, e.g., NSArray<NSString *> *.
10904 if (auto *ArrayLiteral = dyn_cast<ObjCArrayLiteral>(E))
10905 checkObjCArrayLiteral(S, QualType(Target, 0), ArrayLiteral);
10906 else if (auto *DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(E))
10907 checkObjCDictionaryLiteral(S, QualType(Target, 0), DictionaryLiteral);
10908
10909 // Strip vector types.
10910 if (isa<VectorType>(Source)) {
10911 if (!isa<VectorType>(Target)) {
10912 if (S.SourceMgr.isInSystemMacro(CC))
10913 return;
10914 return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_vector_scalar);
10915 }
10916
10917 // If the vector cast is cast between two vectors of the same size, it is
10918 // a bitcast, not a conversion.
10919 if (S.Context.getTypeSize(Source) == S.Context.getTypeSize(Target))
10920 return;
10921
10922 Source = cast<VectorType>(Source)->getElementType().getTypePtr();
10923 Target = cast<VectorType>(Target)->getElementType().getTypePtr();
10924 }
10925 if (auto VecTy = dyn_cast<VectorType>(Target))
10926 Target = VecTy->getElementType().getTypePtr();
10927
10928 // Strip complex types.
10929 if (isa<ComplexType>(Source)) {
10930 if (!isa<ComplexType>(Target)) {
10931 if (S.SourceMgr.isInSystemMacro(CC) || Target->isBooleanType())
10932 return;
10933
10934 return DiagnoseImpCast(S, E, T, CC,
10935 S.getLangOpts().CPlusPlus
10936 ? diag::err_impcast_complex_scalar
10937 : diag::warn_impcast_complex_scalar);
10938 }
10939
10940 Source = cast<ComplexType>(Source)->getElementType().getTypePtr();
10941 Target = cast<ComplexType>(Target)->getElementType().getTypePtr();
10942 }
10943
10944 const BuiltinType *SourceBT = dyn_cast<BuiltinType>(Source);
10945 const BuiltinType *TargetBT = dyn_cast<BuiltinType>(Target);
10946
10947 // If the source is floating point...
10948 if (SourceBT && SourceBT->isFloatingPoint()) {
10949 // ...and the target is floating point...
10950 if (TargetBT && TargetBT->isFloatingPoint()) {
10951 // ...then warn if we're dropping FP rank.
10952
10953 // Builtin FP kinds are ordered by increasing FP rank.
10954 if (SourceBT->getKind() > TargetBT->getKind()) {
10955 // Don't warn about float constants that are precisely
10956 // representable in the target type.
10957 Expr::EvalResult result;
10958 if (E->EvaluateAsRValue(result, S.Context)) {
10959 // Value might be a float, a float vector, or a float complex.
10960 if (IsSameFloatAfterCast(result.Val,
10961 S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)),
10962 S.Context.getFloatTypeSemantics(QualType(SourceBT, 0))))
10963 return;
10964 }
10965
10966 if (S.SourceMgr.isInSystemMacro(CC))
10967 return;
10968
10969 DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_float_precision);
10970 }
10971 // ... or possibly if we're increasing rank, too
10972 else if (TargetBT->getKind() > SourceBT->getKind()) {
10973 if (S.SourceMgr.isInSystemMacro(CC))
10974 return;
10975
10976 DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_double_promotion);
10977 }
10978 return;
10979 }
10980
10981 // If the target is integral, always warn.
10982 if (TargetBT && TargetBT->isInteger()) {
10983 if (S.SourceMgr.isInSystemMacro(CC))
10984 return;
10985
10986 DiagnoseFloatingImpCast(S, E, T, CC);
10987 }
10988
10989 // Detect the case where a call result is converted from floating-point to
10990 // to bool, and the final argument to the call is converted from bool, to
10991 // discover this typo:
10992 //
10993 // bool b = fabs(x < 1.0); // should be "bool b = fabs(x) < 1.0;"
10994 //
10995 // FIXME: This is an incredibly special case; is there some more general
10996 // way to detect this class of misplaced-parentheses bug?
10997 if (Target->isBooleanType() && isa<CallExpr>(E)) {
10998 // Check last argument of function call to see if it is an
10999 // implicit cast from a type matching the type the result
11000 // is being cast to.
11001 CallExpr *CEx = cast<CallExpr>(E);
11002 if (unsigned NumArgs = CEx->getNumArgs()) {
11003 Expr *LastA = CEx->getArg(NumArgs - 1);
11004 Expr *InnerE = LastA->IgnoreParenImpCasts();
11005 if (isa<ImplicitCastExpr>(LastA) &&
11006 InnerE->getType()->isBooleanType()) {
11007 // Warn on this floating-point to bool conversion
11008 DiagnoseImpCast(S, E, T, CC,
11009 diag::warn_impcast_floating_point_to_bool);
11010 }
11011 }
11012 }
11013 return;
11014 }
11015
11016 DiagnoseNullConversion(S, E, T, CC);
11017
11018 S.DiscardMisalignedMemberAddress(Target, E);
11019
11020 if (!Source->isIntegerType() || !Target->isIntegerType())
11021 return;
11022
11023 // TODO: remove this early return once the false positives for constant->bool
11024 // in templates, macros, etc, are reduced or removed.
11025 if (Target->isSpecificBuiltinType(BuiltinType::Bool))
11026 return;
11027
11028 IntRange SourceRange = GetExprRange(S.Context, E);
11029 IntRange TargetRange = IntRange::forTargetOfCanonicalType(S.Context, Target);
11030
11031 if (SourceRange.Width > TargetRange.Width) {
11032 // If the source is a constant, use a default-on diagnostic.
11033 // TODO: this should happen for bitfield stores, too.
11034 Expr::EvalResult Result;
11035 if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects)) {
11036 llvm::APSInt Value(32);
11037 Value = Result.Val.getInt();
11038
11039 if (S.SourceMgr.isInSystemMacro(CC))
11040 return;
11041
11042 std::string PrettySourceValue = Value.toString(10);
11043 std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
11044
11045 S.DiagRuntimeBehavior(E->getExprLoc(), E,
11046 S.PDiag(diag::warn_impcast_integer_precision_constant)
11047 << PrettySourceValue << PrettyTargetValue
11048 << E->getType() << T << E->getSourceRange()
11049 << clang::SourceRange(CC));
11050 return;
11051 }
11052
11053 // People want to build with -Wshorten-64-to-32 and not -Wconversion.
11054 if (S.SourceMgr.isInSystemMacro(CC))
11055 return;
11056
11057 if (TargetRange.Width == 32 && S.Context.getIntWidth(E->getType()) == 64)
11058 return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_64_32,
11059 /* pruneControlFlow */ true);
11060 return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_precision);
11061 }
11062
11063 if (TargetRange.Width > SourceRange.Width) {
11064 if (auto *UO = dyn_cast<UnaryOperator>(E))
11065 if (UO->getOpcode() == UO_Minus)
11066 if (Source->isUnsignedIntegerType()) {
11067 if (Target->isUnsignedIntegerType())
11068 return DiagnoseImpCast(S, E, T, CC,
11069 diag::warn_impcast_high_order_zero_bits);
11070 if (Target->isSignedIntegerType())
11071 return DiagnoseImpCast(S, E, T, CC,
11072 diag::warn_impcast_nonnegative_result);
11073 }
11074 }
11075
11076 if (TargetRange.Width == SourceRange.Width && !TargetRange.NonNegative &&
11077 SourceRange.NonNegative && Source->isSignedIntegerType()) {
11078 // Warn when doing a signed to signed conversion, warn if the positive
11079 // source value is exactly the width of the target type, which will
11080 // cause a negative value to be stored.
11081
11082 Expr::EvalResult Result;
11083 if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects) &&
11084 !S.SourceMgr.isInSystemMacro(CC)) {
11085 llvm::APSInt Value = Result.Val.getInt();
11086 if (isSameWidthConstantConversion(S, E, T, CC)) {
11087 std::string PrettySourceValue = Value.toString(10);
11088 std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
11089
11090 S.DiagRuntimeBehavior(
11091 E->getExprLoc(), E,
11092 S.PDiag(diag::warn_impcast_integer_precision_constant)
11093 << PrettySourceValue << PrettyTargetValue << E->getType() << T
11094 << E->getSourceRange() << clang::SourceRange(CC));
11095 return;
11096 }
11097 }
11098
11099 // Fall through for non-constants to give a sign conversion warning.
11100 }
11101
11102 if ((TargetRange.NonNegative && !SourceRange.NonNegative) ||
11103 (!TargetRange.NonNegative && SourceRange.NonNegative &&
11104 SourceRange.Width == TargetRange.Width)) {
11105 if (S.SourceMgr.isInSystemMacro(CC))
11106 return;
11107
11108 unsigned DiagID = diag::warn_impcast_integer_sign;
11109
11110 // Traditionally, gcc has warned about this under -Wsign-compare.
11111 // We also want to warn about it in -Wconversion.
11112 // So if -Wconversion is off, use a completely identical diagnostic
11113 // in the sign-compare group.
11114 // The conditional-checking code will
11115 if (ICContext) {
11116 DiagID = diag::warn_impcast_integer_sign_conditional;
11117 *ICContext = true;
11118 }
11119
11120 return DiagnoseImpCast(S, E, T, CC, DiagID);
11121 }
11122
11123 // Diagnose conversions between different enumeration types.
11124 // In C, we pretend that the type of an EnumConstantDecl is its enumeration
11125 // type, to give us better diagnostics.
11126 QualType SourceType = E->getType();
11127 if (!S.getLangOpts().CPlusPlus) {
11128 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
11129 if (EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(DRE->getDecl())) {
11130 EnumDecl *Enum = cast<EnumDecl>(ECD->getDeclContext());
11131 SourceType = S.Context.getTypeDeclType(Enum);
11132 Source = S.Context.getCanonicalType(SourceType).getTypePtr();
11133 }
11134 }
11135
11136 if (const EnumType *SourceEnum = Source->getAs<EnumType>())
11137 if (const EnumType *TargetEnum = Target->getAs<EnumType>())
11138 if (SourceEnum->getDecl()->hasNameForLinkage() &&
11139 TargetEnum->getDecl()->hasNameForLinkage() &&
11140 SourceEnum != TargetEnum) {
11141 if (S.SourceMgr.isInSystemMacro(CC))
11142 return;
11143
11144 return DiagnoseImpCast(S, E, SourceType, T, CC,
11145 diag::warn_impcast_different_enum_types);
11146 }
11147 }
11148
11149 static void CheckConditionalOperator(Sema &S, ConditionalOperator *E,
11150 SourceLocation CC, QualType T);
11151
11152 static void CheckConditionalOperand(Sema &S, Expr *E, QualType T,
11153 SourceLocation CC, bool &ICContext) {
11154 E = E->IgnoreParenImpCasts();
11155
11156 if (isa<ConditionalOperator>(E))
11157 return CheckConditionalOperator(S, cast<ConditionalOperator>(E), CC, T);
11158
11159 AnalyzeImplicitConversions(S, E, CC);
11160 if (E->getType() != T)
11161 return CheckImplicitConversion(S, E, T, CC, &ICContext);
11162 }
11163
11164 static void CheckConditionalOperator(Sema &S, ConditionalOperator *E,
11165 SourceLocation CC, QualType T) {
11166 AnalyzeImplicitConversions(S, E->getCond(), E->getQuestionLoc());
11167
11168 bool Suspicious = false;
11169 CheckConditionalOperand(S, E->getTrueExpr(), T, CC, Suspicious);
11170 CheckConditionalOperand(S, E->getFalseExpr(), T, CC, Suspicious);
11171
11172 // If -Wconversion would have warned about either of the candidates
11173 // for a signedness conversion to the context type...
11174 if (!Suspicious) return;
11175
11176 // ...but it's currently ignored...
11177 if (!S.Diags.isIgnored(diag::warn_impcast_integer_sign_conditional, CC))
11178 return;
11179
11180 // ...then check whether it would have warned about either of the
11181 // candidates for a signedness conversion to the condition type.
11182 if (E->getType() == T) return;
11183
11184 Suspicious = false;
11185 CheckImplicitConversion(S, E->getTrueExpr()->IgnoreParenImpCasts(),
11186 E->getType(), CC, &Suspicious);
11187 if (!Suspicious)
11188 CheckImplicitConversion(S, E->getFalseExpr()->IgnoreParenImpCasts(),
11189 E->getType(), CC, &Suspicious);
11190 }
11191
11192 /// Check conversion of given expression to boolean.
11193 /// Input argument E is a logical expression.
11194 static void CheckBoolLikeConversion(Sema &S, Expr *E, SourceLocation CC) {
11195 if (S.getLangOpts().Bool)
11196 return;
11197 if (E->IgnoreParenImpCasts()->getType()->isAtomicType())
11198 return;
11199 CheckImplicitConversion(S, E->IgnoreParenImpCasts(), S.Context.BoolTy, CC);
11200 }
11201
11202 /// AnalyzeImplicitConversions - Find and report any interesting
11203 /// implicit conversions in the given expression. There are a couple
11204 /// of competing diagnostics here, -Wconversion and -Wsign-compare.
11205 static void AnalyzeImplicitConversions(Sema &S, Expr *OrigE,
11206 SourceLocation CC) {
11207 QualType T = OrigE->getType();
11208 Expr *E = OrigE->IgnoreParenImpCasts();
11209
11210 if (E->isTypeDependent() || E->isValueDependent())
11211 return;
11212
11213 // For conditional operators, we analyze the arguments as if they
11214 // were being fed directly into the output.
11215 if (isa<ConditionalOperator>(E)) {
11216 ConditionalOperator *CO = cast<ConditionalOperator>(E);
11217 CheckConditionalOperator(S, CO, CC, T);
11218 return;
11219 }
11220
11221 // Check implicit argument conversions for function calls.
11222 if (CallExpr *Call = dyn_cast<CallExpr>(E))
11223 CheckImplicitArgumentConversions(S, Call, CC);
11224
11225 // Go ahead and check any implicit conversions we might have skipped.
11226 // The non-canonical typecheck is just an optimization;
11227 // CheckImplicitConversion will filter out dead implicit conversions.
11228 if (E->getType() != T)
11229 CheckImplicitConversion(S, E, T, CC);
11230
11231 // Now continue drilling into this expression.
11232
11233 if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) {
11234 // The bound subexpressions in a PseudoObjectExpr are not reachable
11235 // as transitive children.
11236 // FIXME: Use a more uniform representation for this.
11237 for (auto *SE : POE->semantics())
11238 if (auto *OVE = dyn_cast<OpaqueValueExpr>(SE))
11239 AnalyzeImplicitConversions(S, OVE->getSourceExpr(), CC);
11240 }
11241
11242 // Skip past explicit casts.
11243 if (auto *CE = dyn_cast<ExplicitCastExpr>(E)) {
11244 E = CE->getSubExpr()->IgnoreParenImpCasts();
11245 if (!CE->getType()->isVoidType() && E->getType()->isAtomicType())
11246 S.Diag(E->getBeginLoc(), diag::warn_atomic_implicit_seq_cst);
11247 return AnalyzeImplicitConversions(S, E, CC);
11248 }
11249
11250 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
11251 // Do a somewhat different check with comparison operators.
11252 if (BO->isComparisonOp())
11253 return AnalyzeComparison(S, BO);
11254
11255 // And with simple assignments.
11256 if (BO->getOpcode() == BO_Assign)
11257 return AnalyzeAssignment(S, BO);
11258 // And with compound assignments.
11259 if (BO->isAssignmentOp())
11260 return AnalyzeCompoundAssignment(S, BO);
11261 }
11262
11263 // These break the otherwise-useful invariant below. Fortunately,
11264 // we don't really need to recurse into them, because any internal
11265 // expressions should have been analyzed already when they were
11266 // built into statements.
11267 if (isa<StmtExpr>(E)) return;
11268
11269 // Don't descend into unevaluated contexts.
11270 if (isa<UnaryExprOrTypeTraitExpr>(E)) return;
11271
11272 // Now just recurse over the expression's children.
11273 CC = E->getExprLoc();
11274 BinaryOperator *BO = dyn_cast<BinaryOperator>(E);
11275 bool IsLogicalAndOperator = BO && BO->getOpcode() == BO_LAnd;
11276 for (Stmt *SubStmt : E->children()) {
11277 Expr *ChildExpr = dyn_cast_or_null<Expr>(SubStmt);
11278 if (!ChildExpr)
11279 continue;
11280
11281 if (IsLogicalAndOperator &&
11282 isa<StringLiteral>(ChildExpr->IgnoreParenImpCasts()))
11283 // Ignore checking string literals that are in logical and operators.
11284 // This is a common pattern for asserts.
11285 continue;
11286 AnalyzeImplicitConversions(S, ChildExpr, CC);
11287 }
11288
11289 if (BO && BO->isLogicalOp()) {
11290 Expr *SubExpr = BO->getLHS()->IgnoreParenImpCasts();
11291 if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
11292 ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
11293
11294 SubExpr = BO->getRHS()->IgnoreParenImpCasts();
11295 if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
11296 ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
11297 }
11298
11299 if (const UnaryOperator *U = dyn_cast<UnaryOperator>(E)) {
11300 if (U->getOpcode() == UO_LNot) {
11301 ::CheckBoolLikeConversion(S, U->getSubExpr(), CC);
11302 } else if (U->getOpcode() != UO_AddrOf) {
11303 if (U->getSubExpr()->getType()->isAtomicType())
11304 S.Diag(U->getSubExpr()->getBeginLoc(),
11305 diag::warn_atomic_implicit_seq_cst);
11306 }
11307 }
11308 }
11309
11310 /// Diagnose integer type and any valid implicit conversion to it.
11311 static bool checkOpenCLEnqueueIntType(Sema &S, Expr *E, const QualType &IntT) {
11312 // Taking into account implicit conversions,
11313 // allow any integer.
11314 if (!E->getType()->isIntegerType()) {
11315 S.Diag(E->getBeginLoc(),
11316 diag::err_opencl_enqueue_kernel_invalid_local_size_type);
11317 return true;
11318 }
11319 // Potentially emit standard warnings for implicit conversions if enabled
11320 // using -Wconversion.
11321 CheckImplicitConversion(S, E, IntT, E->getBeginLoc());
11322 return false;
11323 }
11324
11325 // Helper function for Sema::DiagnoseAlwaysNonNullPointer.
11326 // Returns true when emitting a warning about taking the address of a reference.
11327 static bool CheckForReference(Sema &SemaRef, const Expr *E,
11328 const PartialDiagnostic &PD) {
11329 E = E->IgnoreParenImpCasts();
11330
11331 const FunctionDecl *FD = nullptr;
11332
11333 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
11334 if (!DRE->getDecl()->getType()->isReferenceType())
11335 return false;
11336 } else if (const MemberExpr *M = dyn_cast<MemberExpr>(E)) {
11337 if (!M->getMemberDecl()->getType()->isReferenceType())
11338 return false;
11339 } else if (const CallExpr *Call = dyn_cast<CallExpr>(E)) {
11340 if (!Call->getCallReturnType(SemaRef.Context)->isReferenceType())
11341 return false;
11342 FD = Call->getDirectCallee();
11343 } else {
11344 return false;
11345 }
11346
11347 SemaRef.Diag(E->getExprLoc(), PD);
11348
11349 // If possible, point to location of function.
11350 if (FD) {
11351 SemaRef.Diag(FD->getLocation(), diag::note_reference_is_return_value) << FD;
11352 }
11353
11354 return true;
11355 }
11356
11357 // Returns true if the SourceLocation is expanded from any macro body.
11358 // Returns false if the SourceLocation is invalid, is from not in a macro
11359 // expansion, or is from expanded from a top-level macro argument.
11360 static bool IsInAnyMacroBody(const SourceManager &SM, SourceLocation Loc) {
11361 if (Loc.isInvalid())
11362 return false;
11363
11364 while (Loc.isMacroID()) {
11365 if (SM.isMacroBodyExpansion(Loc))
11366 return true;
11367 Loc = SM.getImmediateMacroCallerLoc(Loc);
11368 }
11369
11370 return false;
11371 }
11372
11373 /// Diagnose pointers that are always non-null.
11374 /// \param E the expression containing the pointer
11375 /// \param NullKind NPCK_NotNull if E is a cast to bool, otherwise, E is
11376 /// compared to a null pointer
11377 /// \param IsEqual True when the comparison is equal to a null pointer
11378 /// \param Range Extra SourceRange to highlight in the diagnostic
11379 void Sema::DiagnoseAlwaysNonNullPointer(Expr *E,
11380 Expr::NullPointerConstantKind NullKind,
11381 bool IsEqual, SourceRange Range) {
11382 if (!E)
11383 return;
11384
11385 // Don't warn inside macros.
11386 if (E->getExprLoc().isMacroID()) {
11387 const SourceManager &SM = getSourceManager();
11388 if (IsInAnyMacroBody(SM, E->getExprLoc()) ||
11389 IsInAnyMacroBody(SM, Range.getBegin()))
11390 return;
11391 }
11392 E = E->IgnoreImpCasts();
11393
11394 const bool IsCompare = NullKind != Expr::NPCK_NotNull;
11395
11396 if (isa<CXXThisExpr>(E)) {
11397 unsigned DiagID = IsCompare ? diag::warn_this_null_compare
11398 : diag::warn_this_bool_conversion;
11399 Diag(E->getExprLoc(), DiagID) << E->getSourceRange() << Range << IsEqual;
11400 return;
11401 }
11402
11403 bool IsAddressOf = false;
11404
11405 if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
11406 if (UO->getOpcode() != UO_AddrOf)
11407 return;
11408 IsAddressOf = true;
11409 E = UO->getSubExpr();
11410 }
11411
11412 if (IsAddressOf) {
11413 unsigned DiagID = IsCompare
11414 ? diag::warn_address_of_reference_null_compare
11415 : diag::warn_address_of_reference_bool_conversion;
11416 PartialDiagnostic PD = PDiag(DiagID) << E->getSourceRange() << Range
11417 << IsEqual;
11418 if (CheckForReference(*this, E, PD)) {
11419 return;
11420 }
11421 }
11422
11423 auto ComplainAboutNonnullParamOrCall = [&](const Attr *NonnullAttr) {
11424 bool IsParam = isa<NonNullAttr>(NonnullAttr);
11425 std::string Str;
11426 llvm::raw_string_ostream S(Str);
11427 E->printPretty(S, nullptr, getPrintingPolicy());
11428 unsigned DiagID = IsCompare ? diag::warn_nonnull_expr_compare
11429 : diag::warn_cast_nonnull_to_bool;
11430 Diag(E->getExprLoc(), DiagID) << IsParam << S.str()
11431 << E->getSourceRange() << Range << IsEqual;
11432 Diag(NonnullAttr->getLocation(), diag::note_declared_nonnull) << IsParam;
11433 };
11434
11435 // If we have a CallExpr that is tagged with returns_nonnull, we can complain.
11436 if (auto *Call = dyn_cast<CallExpr>(E->IgnoreParenImpCasts())) {
11437 if (auto *Callee = Call->getDirectCallee()) {
11438 if (const Attr *A = Callee->getAttr<ReturnsNonNullAttr>()) {
11439 ComplainAboutNonnullParamOrCall(A);
11440 return;
11441 }
11442 }
11443 }
11444
11445 // Expect to find a single Decl. Skip anything more complicated.
11446 ValueDecl *D = nullptr;
11447 if (DeclRefExpr *R = dyn_cast<DeclRefExpr>(E)) {
11448 D = R->getDecl();
11449 } else if (MemberExpr *M = dyn_cast<MemberExpr>(E)) {
11450 D = M->getMemberDecl();
11451 }
11452
11453 // Weak Decls can be null.
11454 if (!D || D->isWeak())
11455 return;
11456
11457 // Check for parameter decl with nonnull attribute
11458 if (const auto* PV = dyn_cast<ParmVarDecl>(D)) {
11459 if (getCurFunction() &&
11460 !getCurFunction()->ModifiedNonNullParams.count(PV)) {
11461 if (const Attr *A = PV->getAttr<NonNullAttr>()) {
11462 ComplainAboutNonnullParamOrCall(A);
11463 return;
11464 }
11465
11466 if (const auto *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
11467 auto ParamIter = llvm::find(FD->parameters(), PV);
11468 assert(ParamIter != FD->param_end());
11469 unsigned ParamNo = std::distance(FD->param_begin(), ParamIter);
11470
11471 for (const auto *NonNull : FD->specific_attrs<NonNullAttr>()) {
11472 if (!NonNull->args_size()) {
11473 ComplainAboutNonnullParamOrCall(NonNull);
11474 return;
11475 }
11476
11477 for (const ParamIdx &ArgNo : NonNull->args()) {
11478 if (ArgNo.getASTIndex() == ParamNo) {
11479 ComplainAboutNonnullParamOrCall(NonNull);
11480 return;
11481 }
11482 }
11483 }
11484 }
11485 }
11486 }
11487
11488 QualType T = D->getType();
11489 const bool IsArray = T->isArrayType();
11490 const bool IsFunction = T->isFunctionType();
11491
11492 // Address of function is used to silence the function warning.
11493 if (IsAddressOf && IsFunction) {
11494 return;
11495 }
11496
11497 // Found nothing.
11498 if (!IsAddressOf && !IsFunction && !IsArray)
11499 return;
11500
11501 // Pretty print the expression for the diagnostic.
11502 std::string Str;
11503 llvm::raw_string_ostream S(Str);
11504 E->printPretty(S, nullptr, getPrintingPolicy());
11505
11506 unsigned DiagID = IsCompare ? diag::warn_null_pointer_compare
11507 : diag::warn_impcast_pointer_to_bool;
11508 enum {
11509 AddressOf,
11510 FunctionPointer,
11511 ArrayPointer
11512 } DiagType;
11513 if (IsAddressOf)
11514 DiagType = AddressOf;
11515 else if (IsFunction)
11516 DiagType = FunctionPointer;
11517 else if (IsArray)
11518 DiagType = ArrayPointer;
11519 else
11520 llvm_unreachable("Could not determine diagnostic.");
11521 Diag(E->getExprLoc(), DiagID) << DiagType << S.str() << E->getSourceRange()
11522 << Range << IsEqual;
11523
11524 if (!IsFunction)
11525 return;
11526
11527 // Suggest '&' to silence the function warning.
11528 Diag(E->getExprLoc(), diag::note_function_warning_silence)
11529 << FixItHint::CreateInsertion(E->getBeginLoc(), "&");
11530
11531 // Check to see if '()' fixit should be emitted.
11532 QualType ReturnType;
11533 UnresolvedSet<4> NonTemplateOverloads;
11534 tryExprAsCall(*E, ReturnType, NonTemplateOverloads);
11535 if (ReturnType.isNull())
11536 return;
11537
11538 if (IsCompare) {
11539 // There are two cases here. If there is null constant, the only suggest
11540 // for a pointer return type. If the null is 0, then suggest if the return
11541 // type is a pointer or an integer type.
11542 if (!ReturnType->isPointerType()) {
11543 if (NullKind == Expr::NPCK_ZeroExpression ||
11544 NullKind == Expr::NPCK_ZeroLiteral) {
11545 if (!ReturnType->isIntegerType())
11546 return;
11547 } else {
11548 return;
11549 }
11550 }
11551 } else { // !IsCompare
11552 // For function to bool, only suggest if the function pointer has bool
11553 // return type.
11554 if (!ReturnType->isSpecificBuiltinType(BuiltinType::Bool))
11555 return;
11556 }
11557 Diag(E->getExprLoc(), diag::note_function_to_function_call)
11558 << FixItHint::CreateInsertion(getLocForEndOfToken(E->getEndLoc()), "()");
11559 }
11560
11561 /// Diagnoses "dangerous" implicit conversions within the given
11562 /// expression (which is a full expression). Implements -Wconversion
11563 /// and -Wsign-compare.
11564 ///
11565 /// \param CC the "context" location of the implicit conversion, i.e.
11566 /// the most location of the syntactic entity requiring the implicit
11567 /// conversion
11568 void Sema::CheckImplicitConversions(Expr *E, SourceLocation CC) {
11569 // Don't diagnose in unevaluated contexts.
11570 if (isUnevaluatedContext())
11571 return;
11572
11573 // Don't diagnose for value- or type-dependent expressions.
11574 if (E->isTypeDependent() || E->isValueDependent())
11575 return;
11576
11577 // Check for array bounds violations in cases where the check isn't triggered
11578 // elsewhere for other Expr types (like BinaryOperators), e.g. when an
11579 // ArraySubscriptExpr is on the RHS of a variable initialization.
11580 CheckArrayAccess(E);
11581
11582 // This is not the right CC for (e.g.) a variable initialization.
11583 AnalyzeImplicitConversions(*this, E, CC);
11584 }
11585
11586 /// CheckBoolLikeConversion - Check conversion of given expression to boolean.
11587 /// Input argument E is a logical expression.
11588 void Sema::CheckBoolLikeConversion(Expr *E, SourceLocation CC) {
11589 ::CheckBoolLikeConversion(*this, E, CC);
11590 }
11591
11592 /// Diagnose when expression is an integer constant expression and its evaluation
11593 /// results in integer overflow
11594 void Sema::CheckForIntOverflow (Expr *E) {
11595 // Use a work list to deal with nested struct initializers.
11596 SmallVector<Expr *, 2> Exprs(1, E);
11597
11598 do {
11599 Expr *OriginalE = Exprs.pop_back_val();
11600 Expr *E = OriginalE->IgnoreParenCasts();
11601
11602 if (isa<BinaryOperator>(E)) {
11603 E->EvaluateForOverflow(Context);
11604 continue;
11605 }
11606
11607 if (auto InitList = dyn_cast<InitListExpr>(OriginalE))
11608 Exprs.append(InitList->inits().begin(), InitList->inits().end());
11609 else if (isa<ObjCBoxedExpr>(OriginalE))
11610 E->EvaluateForOverflow(Context);
11611 else if (auto Call = dyn_cast<CallExpr>(E))
11612 Exprs.append(Call->arg_begin(), Call->arg_end());
11613 else if (auto Message = dyn_cast<ObjCMessageExpr>(E))
11614 Exprs.append(Message->arg_begin(), Message->arg_end());
11615 } while (!Exprs.empty());
11616 }
11617
11618 namespace {
11619
11620 /// Visitor for expressions which looks for unsequenced operations on the
11621 /// same object.
11622 class SequenceChecker : public EvaluatedExprVisitor<SequenceChecker> {
11623 using Base = EvaluatedExprVisitor<SequenceChecker>;
11624
11625 /// A tree of sequenced regions within an expression. Two regions are
11626 /// unsequenced if one is an ancestor or a descendent of the other. When we
11627 /// finish processing an expression with sequencing, such as a comma
11628 /// expression, we fold its tree nodes into its parent, since they are
11629 /// unsequenced with respect to nodes we will visit later.
11630 class SequenceTree {
11631 struct Value {
11632 explicit Value(unsigned Parent) : Parent(Parent), Merged(false) {}
11633 unsigned Parent : 31;
11634 unsigned Merged : 1;
11635 };
11636 SmallVector<Value, 8> Values;
11637
11638 public:
11639 /// A region within an expression which may be sequenced with respect
11640 /// to some other region.
11641 class Seq {
11642 friend class SequenceTree;
11643
11644 unsigned Index = 0;
11645
11646 explicit Seq(unsigned N) : Index(N) {}
11647
11648 public:
11649 Seq() = default;
11650 };
11651
11652 SequenceTree() { Values.push_back(Value(0)); }
11653 Seq root() const { return Seq(0); }
11654
11655 /// Create a new sequence of operations, which is an unsequenced
11656 /// subset of \p Parent. This sequence of operations is sequenced with
11657 /// respect to other children of \p Parent.
11658 Seq allocate(Seq Parent) {
11659 Values.push_back(Value(Parent.Index));
11660 return Seq(Values.size() - 1);
11661 }
11662
11663 /// Merge a sequence of operations into its parent.
11664 void merge(Seq S) {
11665 Values[S.Index].Merged = true;
11666 }
11667
11668 /// Determine whether two operations are unsequenced. This operation
11669 /// is asymmetric: \p Cur should be the more recent sequence, and \p Old
11670 /// should have been merged into its parent as appropriate.
11671 bool isUnsequenced(Seq Cur, Seq Old) {
11672 unsigned C = representative(Cur.Index);
11673 unsigned Target = representative(Old.Index);
11674 while (C >= Target) {
11675 if (C == Target)
11676 return true;
11677 C = Values[C].Parent;
11678 }
11679 return false;
11680 }
11681
11682 private:
11683 /// Pick a representative for a sequence.
11684 unsigned representative(unsigned K) {
11685 if (Values[K].Merged)
11686 // Perform path compression as we go.
11687 return Values[K].Parent = representative(Values[K].Parent);
11688 return K;
11689 }
11690 };
11691
11692 /// An object for which we can track unsequenced uses.
11693 using Object = NamedDecl *;
11694
11695 /// Different flavors of object usage which we track. We only track the
11696 /// least-sequenced usage of each kind.
11697 enum UsageKind {
11698 /// A read of an object. Multiple unsequenced reads are OK.
11699 UK_Use,
11700
11701 /// A modification of an object which is sequenced before the value
11702 /// computation of the expression, such as ++n in C++.
11703 UK_ModAsValue,
11704
11705 /// A modification of an object which is not sequenced before the value
11706 /// computation of the expression, such as n++.
11707 UK_ModAsSideEffect,
11708
11709 UK_Count = UK_ModAsSideEffect + 1
11710 };
11711
11712 struct Usage {
11713 Expr *Use = nullptr;
11714 SequenceTree::Seq Seq;
11715
11716 Usage() = default;
11717 };
11718
11719 struct UsageInfo {
11720 Usage Uses[UK_Count];
11721
11722 /// Have we issued a diagnostic for this variable already?
11723 bool Diagnosed = false;
11724
11725 UsageInfo() = default;
11726 };
11727 using UsageInfoMap = llvm::SmallDenseMap<Object, UsageInfo, 16>;
11728
11729 Sema &SemaRef;
11730
11731 /// Sequenced regions within the expression.
11732 SequenceTree Tree;
11733
11734 /// Declaration modifications and references which we have seen.
11735 UsageInfoMap UsageMap;
11736
11737 /// The region we are currently within.
11738 SequenceTree::Seq Region;
11739
11740 /// Filled in with declarations which were modified as a side-effect
11741 /// (that is, post-increment operations).
11742 SmallVectorImpl<std::pair<Object, Usage>> *ModAsSideEffect = nullptr;
11743
11744 /// Expressions to check later. We defer checking these to reduce
11745 /// stack usage.
11746 SmallVectorImpl<Expr *> &WorkList;
11747
11748 /// RAII object wrapping the visitation of a sequenced subexpression of an
11749 /// expression. At the end of this process, the side-effects of the evaluation
11750 /// become sequenced with respect to the value computation of the result, so
11751 /// we downgrade any UK_ModAsSideEffect within the evaluation to
11752 /// UK_ModAsValue.
11753 struct SequencedSubexpression {
11754 SequencedSubexpression(SequenceChecker &Self)
11755 : Self(Self), OldModAsSideEffect(Self.ModAsSideEffect) {
11756 Self.ModAsSideEffect = &ModAsSideEffect;
11757 }
11758
11759 ~SequencedSubexpression() {
11760 for (auto &M : llvm::reverse(ModAsSideEffect)) {
11761 UsageInfo &U = Self.UsageMap[M.first];
11762 auto &SideEffectUsage = U.Uses[UK_ModAsSideEffect];
11763 Self.addUsage(U, M.first, SideEffectUsage.Use, UK_ModAsValue);
11764 SideEffectUsage = M.second;
11765 }
11766 Self.ModAsSideEffect = OldModAsSideEffect;
11767 }
11768
11769 SequenceChecker &Self;
11770 SmallVector<std::pair<Object, Usage>, 4> ModAsSideEffect;
11771 SmallVectorImpl<std::pair<Object, Usage>> *OldModAsSideEffect;
11772 };
11773
11774 /// RAII object wrapping the visitation of a subexpression which we might
11775 /// choose to evaluate as a constant. If any subexpression is evaluated and
11776 /// found to be non-constant, this allows us to suppress the evaluation of
11777 /// the outer expression.
11778 class EvaluationTracker {
11779 public:
11780 EvaluationTracker(SequenceChecker &Self)
11781 : Self(Self), Prev(Self.EvalTracker) {
11782 Self.EvalTracker = this;
11783 }
11784
11785 ~EvaluationTracker() {
11786 Self.EvalTracker = Prev;
11787 if (Prev)
11788 Prev->EvalOK &= EvalOK;
11789 }
11790
11791 bool evaluate(const Expr *E, bool &Result) {
11792 if (!EvalOK || E->isValueDependent())
11793 return false;
11794 EvalOK = E->EvaluateAsBooleanCondition(Result, Self.SemaRef.Context);
11795 return EvalOK;
11796 }
11797
11798 private:
11799 SequenceChecker &Self;
11800 EvaluationTracker *Prev;
11801 bool EvalOK = true;
11802 } *EvalTracker = nullptr;
11803
11804 /// Find the object which is produced by the specified expression,
11805 /// if any.
11806 Object getObject(Expr *E, bool Mod) const {
11807 E = E->IgnoreParenCasts();
11808 if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
11809 if (Mod && (UO->getOpcode() == UO_PreInc || UO->getOpcode() == UO_PreDec))
11810 return getObject(UO->getSubExpr(), Mod);
11811 } else if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
11812 if (BO->getOpcode() == BO_Comma)
11813 return getObject(BO->getRHS(), Mod);
11814 if (Mod && BO->isAssignmentOp())
11815 return getObject(BO->getLHS(), Mod);
11816 } else if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
11817 // FIXME: Check for more interesting cases, like "x.n = ++x.n".
11818 if (isa<CXXThisExpr>(ME->getBase()->IgnoreParenCasts()))
11819 return ME->getMemberDecl();
11820 } else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
11821 // FIXME: If this is a reference, map through to its value.
11822 return DRE->getDecl();
11823 return nullptr;
11824 }
11825
11826 /// Note that an object was modified or used by an expression.
11827 void addUsage(UsageInfo &UI, Object O, Expr *Ref, UsageKind UK) {
11828 Usage &U = UI.Uses[UK];
11829 if (!U.Use || !Tree.isUnsequenced(Region, U.Seq)) {
11830 if (UK == UK_ModAsSideEffect && ModAsSideEffect)
11831 ModAsSideEffect->push_back(std::make_pair(O, U));
11832 U.Use = Ref;
11833 U.Seq = Region;
11834 }
11835 }
11836
11837 /// Check whether a modification or use conflicts with a prior usage.
11838 void checkUsage(Object O, UsageInfo &UI, Expr *Ref, UsageKind OtherKind,
11839 bool IsModMod) {
11840 if (UI.Diagnosed)
11841 return;
11842
11843 const Usage &U = UI.Uses[OtherKind];
11844 if (!U.Use || !Tree.isUnsequenced(Region, U.Seq))
11845 return;
11846
11847 Expr *Mod = U.Use;
11848 Expr *ModOrUse = Ref;
11849 if (OtherKind == UK_Use)
11850 std::swap(Mod, ModOrUse);
11851
11852 SemaRef.Diag(Mod->getExprLoc(),
11853 IsModMod ? diag::warn_unsequenced_mod_mod
11854 : diag::warn_unsequenced_mod_use)
11855 << O << SourceRange(ModOrUse->getExprLoc());
11856 UI.Diagnosed = true;
11857 }
11858
11859 void notePreUse(Object O, Expr *Use) {
11860 UsageInfo &U = UsageMap[O];
11861 // Uses conflict with other modifications.
11862 checkUsage(O, U, Use, UK_ModAsValue, false);
11863 }
11864
11865 void notePostUse(Object O, Expr *Use) {
11866 UsageInfo &U = UsageMap[O];
11867 checkUsage(O, U, Use, UK_ModAsSideEffect, false);
11868 addUsage(U, O, Use, UK_Use);
11869 }
11870
11871 void notePreMod(Object O, Expr *Mod) {
11872 UsageInfo &U = UsageMap[O];
11873 // Modifications conflict with other modifications and with uses.
11874 checkUsage(O, U, Mod, UK_ModAsValue, true);
11875 checkUsage(O, U, Mod, UK_Use, false);
11876 }
11877
11878 void notePostMod(Object O, Expr *Use, UsageKind UK) {
11879 UsageInfo &U = UsageMap[O];
11880 checkUsage(O, U, Use, UK_ModAsSideEffect, true);
11881 addUsage(U, O, Use, UK);
11882 }
11883
11884 public:
11885 SequenceChecker(Sema &S, Expr *E, SmallVectorImpl<Expr *> &WorkList)
11886 : Base(S.Context), SemaRef(S), Region(Tree.root()), WorkList(WorkList) {
11887 Visit(E);
11888 }
11889
11890 void VisitStmt(Stmt *S) {
11891 // Skip all statements which aren't expressions for now.
11892 }
11893
11894 void VisitExpr(Expr *E) {
11895 // By default, just recurse to evaluated subexpressions.
11896 Base::VisitStmt(E);
11897 }
11898
11899 void VisitCastExpr(CastExpr *E) {
11900 Object O = Object();
11901 if (E->getCastKind() == CK_LValueToRValue)
11902 O = getObject(E->getSubExpr(), false);
11903
11904 if (O)
11905 notePreUse(O, E);
11906 VisitExpr(E);
11907 if (O)
11908 notePostUse(O, E);
11909 }
11910
11911 void VisitSequencedExpressions(Expr *SequencedBefore, Expr *SequencedAfter) {
11912 SequenceTree::Seq BeforeRegion = Tree.allocate(Region);
11913 SequenceTree::Seq AfterRegion = Tree.allocate(Region);
11914 SequenceTree::Seq OldRegion = Region;
11915
11916 {
11917 SequencedSubexpression SeqBefore(*this);
11918 Region = BeforeRegion;
11919 Visit(SequencedBefore);
11920 }
11921
11922 Region = AfterRegion;
11923 Visit(SequencedAfter);
11924
11925 Region = OldRegion;
11926
11927 Tree.merge(BeforeRegion);
11928 Tree.merge(AfterRegion);
11929 }
11930
11931 void VisitArraySubscriptExpr(ArraySubscriptExpr *ASE) {
11932 // C++17 [expr.sub]p1:
11933 // The expression E1[E2] is identical (by definition) to *((E1)+(E2)). The
11934 // expression E1 is sequenced before the expression E2.
11935 if (SemaRef.getLangOpts().CPlusPlus17)
11936 VisitSequencedExpressions(ASE->getLHS(), ASE->getRHS());
11937 else
11938 Base::VisitStmt(ASE);
11939 }
11940
11941 void VisitBinComma(BinaryOperator *BO) {
11942 // C++11 [expr.comma]p1:
11943 // Every value computation and side effect associated with the left
11944 // expression is sequenced before every value computation and side
11945 // effect associated with the right expression.
11946 VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
11947 }
11948
11949 void VisitBinAssign(BinaryOperator *BO) {
11950 // The modification is sequenced after the value computation of the LHS
11951 // and RHS, so check it before inspecting the operands and update the
11952 // map afterwards.
11953 Object O = getObject(BO->getLHS(), true);
11954 if (!O)
11955 return VisitExpr(BO);
11956
11957 notePreMod(O, BO);
11958
11959 // C++11 [expr.ass]p7:
11960 // E1 op= E2 is equivalent to E1 = E1 op E2, except that E1 is evaluated
11961 // only once.
11962 //
11963 // Therefore, for a compound assignment operator, O is considered used
11964 // everywhere except within the evaluation of E1 itself.
11965 if (isa<CompoundAssignOperator>(BO))
11966 notePreUse(O, BO);
11967
11968 Visit(BO->getLHS());
11969
11970 if (isa<CompoundAssignOperator>(BO))
11971 notePostUse(O, BO);
11972
11973 Visit(BO->getRHS());
11974
11975 // C++11 [expr.ass]p1:
11976 // the assignment is sequenced [...] before the value computation of the
11977 // assignment expression.
11978 // C11 6.5.16/3 has no such rule.
11979 notePostMod(O, BO, SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
11980 : UK_ModAsSideEffect);
11981 }
11982
11983 void VisitCompoundAssignOperator(CompoundAssignOperator *CAO) {
11984 VisitBinAssign(CAO);
11985 }
11986
11987 void VisitUnaryPreInc(UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
11988 void VisitUnaryPreDec(UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
11989 void VisitUnaryPreIncDec(UnaryOperator *UO) {
11990 Object O = getObject(UO->getSubExpr(), true);
11991 if (!O)
11992 return VisitExpr(UO);
11993
11994 notePreMod(O, UO);
11995 Visit(UO->getSubExpr());
11996 // C++11 [expr.pre.incr]p1:
11997 // the expression ++x is equivalent to x+=1
11998 notePostMod(O, UO, SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
11999 : UK_ModAsSideEffect);
12000 }
12001
12002 void VisitUnaryPostInc(UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
12003 void VisitUnaryPostDec(UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
12004 void VisitUnaryPostIncDec(UnaryOperator *UO) {
12005 Object O = getObject(UO->getSubExpr(), true);
12006 if (!O)
12007 return VisitExpr(UO);
12008
12009 notePreMod(O, UO);
12010 Visit(UO->getSubExpr());
12011 notePostMod(O, UO, UK_ModAsSideEffect);
12012 }
12013
12014 /// Don't visit the RHS of '&&' or '||' if it might not be evaluated.
12015 void VisitBinLOr(BinaryOperator *BO) {
12016 // The side-effects of the LHS of an '&&' are sequenced before the
12017 // value computation of the RHS, and hence before the value computation
12018 // of the '&&' itself, unless the LHS evaluates to zero. We treat them
12019 // as if they were unconditionally sequenced.
12020 EvaluationTracker Eval(*this);
12021 {
12022 SequencedSubexpression Sequenced(*this);
12023 Visit(BO->getLHS());
12024 }
12025
12026 bool Result;
12027 if (Eval.evaluate(BO->getLHS(), Result)) {
12028 if (!Result)
12029 Visit(BO->getRHS());
12030 } else {
12031 // Check for unsequenced operations in the RHS, treating it as an
12032 // entirely separate evaluation.
12033 //
12034 // FIXME: If there are operations in the RHS which are unsequenced
12035 // with respect to operations outside the RHS, and those operations
12036 // are unconditionally evaluated, diagnose them.
12037 WorkList.push_back(BO->getRHS());
12038 }
12039 }
12040 void VisitBinLAnd(BinaryOperator *BO) {
12041 EvaluationTracker Eval(*this);
12042 {
12043 SequencedSubexpression Sequenced(*this);
12044 Visit(BO->getLHS());
12045 }
12046
12047 bool Result;
12048 if (Eval.evaluate(BO->getLHS(), Result)) {
12049 if (Result)
12050 Visit(BO->getRHS());
12051 } else {
12052 WorkList.push_back(BO->getRHS());
12053 }
12054 }
12055
12056 // Only visit the condition, unless we can be sure which subexpression will
12057 // be chosen.
12058 void VisitAbstractConditionalOperator(AbstractConditionalOperator *CO) {
12059 EvaluationTracker Eval(*this);
12060 {
12061 SequencedSubexpression Sequenced(*this);
12062 Visit(CO->getCond());
12063 }
12064
12065 bool Result;
12066 if (Eval.evaluate(CO->getCond(), Result))
12067 Visit(Result ? CO->getTrueExpr() : CO->getFalseExpr());
12068 else {
12069 WorkList.push_back(CO->getTrueExpr());
12070 WorkList.push_back(CO->getFalseExpr());
12071 }
12072 }
12073
12074 void VisitCallExpr(CallExpr *CE) {
12075 // C++11 [intro.execution]p15:
12076 // When calling a function [...], every value computation and side effect
12077 // associated with any argument expression, or with the postfix expression
12078 // designating the called function, is sequenced before execution of every
12079 // expression or statement in the body of the function [and thus before
12080 // the value computation of its result].
12081 SequencedSubexpression Sequenced(*this);
12082 Base::VisitCallExpr(CE);
12083
12084 // FIXME: CXXNewExpr and CXXDeleteExpr implicitly call functions.
12085 }
12086
12087 void VisitCXXConstructExpr(CXXConstructExpr *CCE) {
12088 // This is a call, so all subexpressions are sequenced before the result.
12089 SequencedSubexpression Sequenced(*this);
12090
12091 if (!CCE->isListInitialization())
12092 return VisitExpr(CCE);
12093
12094 // In C++11, list initializations are sequenced.
12095 SmallVector<SequenceTree::Seq, 32> Elts;
12096 SequenceTree::Seq Parent = Region;
12097 for (CXXConstructExpr::arg_iterator I = CCE->arg_begin(),
12098 E = CCE->arg_end();
12099 I != E; ++I) {
12100 Region = Tree.allocate(Parent);
12101 Elts.push_back(Region);
12102 Visit(*I);
12103 }
12104
12105 // Forget that the initializers are sequenced.
12106 Region = Parent;
12107 for (unsigned I = 0; I < Elts.size(); ++I)
12108 Tree.merge(Elts[I]);
12109 }
12110
12111 void VisitInitListExpr(InitListExpr *ILE) {
12112 if (!SemaRef.getLangOpts().CPlusPlus11)
12113 return VisitExpr(ILE);
12114
12115 // In C++11, list initializations are sequenced.
12116 SmallVector<SequenceTree::Seq, 32> Elts;
12117 SequenceTree::Seq Parent = Region;
12118 for (unsigned I = 0; I < ILE->getNumInits(); ++I) {
12119 Expr *E = ILE->getInit(I);
12120 if (!E) continue;
12121 Region = Tree.allocate(Parent);
12122 Elts.push_back(Region);
12123 Visit(E);
12124 }
12125
12126 // Forget that the initializers are sequenced.
12127 Region = Parent;
12128 for (unsigned I = 0; I < Elts.size(); ++I)
12129 Tree.merge(Elts[I]);
12130 }
12131 };
12132
12133 } // namespace
12134
12135 void Sema::CheckUnsequencedOperations(Expr *E) {
12136 SmallVector<Expr *, 8> WorkList;
12137 WorkList.push_back(E);
12138 while (!WorkList.empty()) {
12139 Expr *Item = WorkList.pop_back_val();
12140 SequenceChecker(*this, Item, WorkList);
12141 }
12142 }
12143
12144 void Sema::CheckCompletedExpr(Expr *E, SourceLocation CheckLoc,
12145 bool IsConstexpr) {
12146 CheckImplicitConversions(E, CheckLoc);
12147 if (!E->isInstantiationDependent())
12148 CheckUnsequencedOperations(E);
12149 if (!IsConstexpr && !E->isValueDependent())
12150 CheckForIntOverflow(E);
12151 DiagnoseMisalignedMembers();
12152 }
12153
12154 void Sema::CheckBitFieldInitialization(SourceLocation InitLoc,
12155 FieldDecl *BitField,
12156 Expr *Init) {
12157 (void) AnalyzeBitFieldAssignment(*this, BitField, Init, InitLoc);
12158 }
12159
12160 static void diagnoseArrayStarInParamType(Sema &S, QualType PType,
12161 SourceLocation Loc) {
12162 if (!PType->isVariablyModifiedType())
12163 return;
12164 if (const auto *PointerTy = dyn_cast<PointerType>(PType)) {
12165 diagnoseArrayStarInParamType(S, PointerTy->getPointeeType(), Loc);
12166 return;
12167 }
12168 if (const auto *ReferenceTy = dyn_cast<ReferenceType>(PType)) {
12169 diagnoseArrayStarInParamType(S, ReferenceTy->getPointeeType(), Loc);
12170 return;
12171 }
12172 if (const auto *ParenTy = dyn_cast<ParenType>(PType)) {
12173 diagnoseArrayStarInParamType(S, ParenTy->getInnerType(), Loc);
12174 return;
12175 }
12176
12177 const ArrayType *AT = S.Context.getAsArrayType(PType);
12178 if (!AT)
12179 return;
12180
12181 if (AT->getSizeModifier() != ArrayType::Star) {
12182 diagnoseArrayStarInParamType(S, AT->getElementType(), Loc);
12183 return;
12184 }
12185
12186 S.Diag(Loc, diag::err_array_star_in_function_definition);
12187 }
12188
12189 /// CheckParmsForFunctionDef - Check that the parameters of the given
12190 /// function are appropriate for the definition of a function. This
12191 /// takes care of any checks that cannot be performed on the
12192 /// declaration itself, e.g., that the types of each of the function
12193 /// parameters are complete.
12194 bool Sema::CheckParmsForFunctionDef(ArrayRef<ParmVarDecl *> Parameters,
12195 bool CheckParameterNames) {
12196 bool HasInvalidParm = false;
12197 for (ParmVarDecl *Param : Parameters) {
12198 // C99 6.7.5.3p4: the parameters in a parameter type list in a
12199 // function declarator that is part of a function definition of
12200 // that function shall not have incomplete type.
12201 //
12202 // This is also C++ [dcl.fct]p6.
12203 if (!Param->isInvalidDecl() &&
12204 RequireCompleteType(Param->getLocation(), Param->getType(),
12205 diag::err_typecheck_decl_incomplete_type)) {
12206 Param->setInvalidDecl();
12207 HasInvalidParm = true;
12208 }
12209
12210 // C99 6.9.1p5: If the declarator includes a parameter type list, the
12211 // declaration of each parameter shall include an identifier.
12212 if (CheckParameterNames &&
12213 Param->getIdentifier() == nullptr &&
12214 !Param->isImplicit() &&
12215 !getLangOpts().CPlusPlus)
12216 Diag(Param->getLocation(), diag::err_parameter_name_omitted);
12217
12218 // C99 6.7.5.3p12:
12219 // If the function declarator is not part of a definition of that
12220 // function, parameters may have incomplete type and may use the [*]
12221 // notation in their sequences of declarator specifiers to specify
12222 // variable length array types.
12223 QualType PType = Param->getOriginalType();
12224 // FIXME: This diagnostic should point the '[*]' if source-location
12225 // information is added for it.
12226 diagnoseArrayStarInParamType(*this, PType, Param->getLocation());
12227
12228 // If the parameter is a c++ class type and it has to be destructed in the
12229 // callee function, declare the destructor so that it can be called by the
12230 // callee function. Do not perform any direct access check on the dtor here.
12231 if (!Param->isInvalidDecl()) {
12232 if (CXXRecordDecl *ClassDecl = Param->getType()->getAsCXXRecordDecl()) {
12233 if (!ClassDecl->isInvalidDecl() &&
12234 !ClassDecl->hasIrrelevantDestructor() &&
12235 !ClassDecl->isDependentContext() &&
12236 ClassDecl->isParamDestroyedInCallee()) {
12237 CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl);
12238 MarkFunctionReferenced(Param->getLocation(), Destructor);
12239 DiagnoseUseOfDecl(Destructor, Param->getLocation());
12240 }
12241 }
12242 }
12243
12244 // Parameters with the pass_object_size attribute only need to be marked
12245 // constant at function definitions. Because we lack information about
12246 // whether we're on a declaration or definition when we're instantiating the
12247 // attribute, we need to check for constness here.
12248 if (const auto *Attr = Param->getAttr<PassObjectSizeAttr>())
12249 if (!Param->getType().isConstQualified())
12250 Diag(Param->getLocation(), diag::err_attribute_pointers_only)
12251 << Attr->getSpelling() << 1;
12252
12253 // Check for parameter names shadowing fields from the class.
12254 if (LangOpts.CPlusPlus && !Param->isInvalidDecl()) {
12255 // The owning context for the parameter should be the function, but we
12256 // want to see if this function's declaration context is a record.
12257 DeclContext *DC = Param->getDeclContext();
12258 if (DC && DC->isFunctionOrMethod()) {
12259 if (auto *RD = dyn_cast<CXXRecordDecl>(DC->getParent()))
12260 CheckShadowInheritedFields(Param->getLocation(), Param->getDeclName(),
12261 RD, /*DeclIsField*/ false);
12262 }
12263 }
12264 }
12265
12266 return HasInvalidParm;
12267 }
12268
12269 /// A helper function to get the alignment of a Decl referred to by DeclRefExpr
12270 /// or MemberExpr.
12271 static CharUnits getDeclAlign(Expr *E, CharUnits TypeAlign,
12272 ASTContext &Context) {
12273 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
12274 return Context.getDeclAlign(DRE->getDecl());
12275
12276 if (const auto *ME = dyn_cast<MemberExpr>(E))
12277 return Context.getDeclAlign(ME->getMemberDecl());
12278
12279 return TypeAlign;
12280 }
12281
12282 /// CheckCastAlign - Implements -Wcast-align, which warns when a
12283 /// pointer cast increases the alignment requirements.
12284 void Sema::CheckCastAlign(Expr *Op, QualType T, SourceRange TRange) {
12285 // This is actually a lot of work to potentially be doing on every
12286 // cast; don't do it if we're ignoring -Wcast_align (as is the default).
12287 if (getDiagnostics().isIgnored(diag::warn_cast_align, TRange.getBegin()))
12288 return;
12289
12290 // Ignore dependent types.
12291 if (T->isDependentType() || Op->getType()->isDependentType())
12292 return;
12293
12294 // Require that the destination be a pointer type.
12295 const PointerType *DestPtr = T->getAs<PointerType>();
12296 if (!DestPtr) return;
12297
12298 // If the destination has alignment 1, we're done.
12299 QualType DestPointee = DestPtr->getPointeeType();
12300 if (DestPointee->isIncompleteType()) return;
12301 CharUnits DestAlign = Context.getTypeAlignInChars(DestPointee);
12302 if (DestAlign.isOne()) return;
12303
12304 // Require that the source be a pointer type.
12305 const PointerType *SrcPtr = Op->getType()->getAs<PointerType>();
12306 if (!SrcPtr) return;
12307 QualType SrcPointee = SrcPtr->getPointeeType();
12308
12309 // Whitelist casts from cv void*. We already implicitly
12310 // whitelisted casts to cv void*, since they have alignment 1.
12311 // Also whitelist casts involving incomplete types, which implicitly
12312 // includes 'void'.
12313 if (SrcPointee->isIncompleteType()) return;
12314
12315 CharUnits SrcAlign = Context.getTypeAlignInChars(SrcPointee);
12316
12317 if (auto *CE = dyn_cast<CastExpr>(Op)) {
12318 if (CE->getCastKind() == CK_ArrayToPointerDecay)
12319 SrcAlign = getDeclAlign(CE->getSubExpr(), SrcAlign, Context);
12320 } else if (auto *UO = dyn_cast<UnaryOperator>(Op)) {
12321 if (UO->getOpcode() == UO_AddrOf)
12322 SrcAlign = getDeclAlign(UO->getSubExpr(), SrcAlign, Context);
12323 }
12324
12325 if (SrcAlign >= DestAlign) return;
12326
12327 Diag(TRange.getBegin(), diag::warn_cast_align)
12328 << Op->getType() << T
12329 << static_cast<unsigned>(SrcAlign.getQuantity())
12330 << static_cast<unsigned>(DestAlign.getQuantity())
12331 << TRange << Op->getSourceRange();
12332 }
12333
12334 /// Check whether this array fits the idiom of a size-one tail padded
12335 /// array member of a struct.
12336 ///
12337 /// We avoid emitting out-of-bounds access warnings for such arrays as they are
12338 /// commonly used to emulate flexible arrays in C89 code.
12339 static bool IsTailPaddedMemberArray(Sema &S, const llvm::APInt &Size,
12340 const NamedDecl *ND) {
12341 if (Size != 1 || !ND) return false;
12342
12343 const FieldDecl *FD = dyn_cast<FieldDecl>(ND);
12344 if (!FD) return false;
12345
12346 // Don't consider sizes resulting from macro expansions or template argument
12347 // substitution to form C89 tail-padded arrays.
12348
12349 TypeSourceInfo *TInfo = FD->getTypeSourceInfo();
12350 while (TInfo) {
12351 TypeLoc TL = TInfo->getTypeLoc();
12352 // Look through typedefs.
12353 if (TypedefTypeLoc TTL = TL.getAs<TypedefTypeLoc>()) {
12354 const TypedefNameDecl *TDL = TTL.getTypedefNameDecl();
12355 TInfo = TDL->getTypeSourceInfo();
12356 continue;
12357 }
12358 if (ConstantArrayTypeLoc CTL = TL.getAs<ConstantArrayTypeLoc>()) {
12359 const Expr *SizeExpr = dyn_cast<IntegerLiteral>(CTL.getSizeExpr());
12360 if (!SizeExpr || SizeExpr->getExprLoc().isMacroID())
12361 return false;
12362 }
12363 break;
12364 }
12365
12366 const RecordDecl *RD = dyn_cast<RecordDecl>(FD->getDeclContext());
12367 if (!RD) return false;
12368 if (RD->isUnion()) return false;
12369 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
12370 if (!CRD->isStandardLayout()) return false;
12371 }
12372
12373 // See if this is the last field decl in the record.
12374 const Decl *D = FD;
12375 while ((D = D->getNextDeclInContext()))
12376 if (isa<FieldDecl>(D))
12377 return false;
12378 return true;
12379 }
12380
12381 void Sema::CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
12382 const ArraySubscriptExpr *ASE,
12383 bool AllowOnePastEnd, bool IndexNegated) {
12384 IndexExpr = IndexExpr->IgnoreParenImpCasts();
12385 if (IndexExpr->isValueDependent())
12386 return;
12387
12388 const Type *EffectiveType =
12389 BaseExpr->getType()->getPointeeOrArrayElementType();
12390 BaseExpr = BaseExpr->IgnoreParenCasts();
12391 const ConstantArrayType *ArrayTy =
12392 Context.getAsConstantArrayType(BaseExpr->getType());
12393
12394 if (!ArrayTy)
12395 return;
12396
12397 const Type *BaseType = ArrayTy->getElementType().getTypePtr();
12398
12399 Expr::EvalResult Result;
12400 if (!IndexExpr->EvaluateAsInt(Result, Context, Expr::SE_AllowSideEffects))
12401 return;
12402
12403 llvm::APSInt index = Result.Val.getInt();
12404 if (IndexNegated)
12405 index = -index;
12406
12407 const NamedDecl *ND = nullptr;
12408 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
12409 ND = DRE->getDecl();
12410 if (const MemberExpr *ME = dyn_cast<MemberExpr>(BaseExpr))
12411 ND = ME->getMemberDecl();
12412
12413 if (index.isUnsigned() || !index.isNegative()) {
12414 // It is possible that the type of the base expression after
12415 // IgnoreParenCasts is incomplete, even though the type of the base
12416 // expression before IgnoreParenCasts is complete (see PR39746 for an
12417 // example). In this case we have no information about whether the array
12418 // access exceeds the array bounds. However we can still diagnose an array
12419 // access which precedes the array bounds.
12420 if (BaseType->isIncompleteType())
12421 return;
12422
12423 llvm::APInt size = ArrayTy->getSize();
12424 if (!size.isStrictlyPositive())
12425 return;
12426
12427 if (BaseType != EffectiveType) {
12428 // Make sure we're comparing apples to apples when comparing index to size
12429 uint64_t ptrarith_typesize = Context.getTypeSize(EffectiveType);
12430 uint64_t array_typesize = Context.getTypeSize(BaseType);
12431 // Handle ptrarith_typesize being zero, such as when casting to void*
12432 if (!ptrarith_typesize) ptrarith_typesize = 1;
12433 if (ptrarith_typesize != array_typesize) {
12434 // There's a cast to a different size type involved
12435 uint64_t ratio = array_typesize / ptrarith_typesize;
12436 // TODO: Be smarter about handling cases where array_typesize is not a
12437 // multiple of ptrarith_typesize
12438 if (ptrarith_typesize * ratio == array_typesize)
12439 size *= llvm::APInt(size.getBitWidth(), ratio);
12440 }
12441 }
12442
12443 if (size.getBitWidth() > index.getBitWidth())
12444 index = index.zext(size.getBitWidth());
12445 else if (size.getBitWidth() < index.getBitWidth())
12446 size = size.zext(index.getBitWidth());
12447
12448 // For array subscripting the index must be less than size, but for pointer
12449 // arithmetic also allow the index (offset) to be equal to size since
12450 // computing the next address after the end of the array is legal and
12451 // commonly done e.g. in C++ iterators and range-based for loops.
12452 if (AllowOnePastEnd ? index.ule(size) : index.ult(size))
12453 return;
12454
12455 // Also don't warn for arrays of size 1 which are members of some
12456 // structure. These are often used to approximate flexible arrays in C89
12457 // code.
12458 if (IsTailPaddedMemberArray(*this, size, ND))
12459 return;
12460
12461 // Suppress the warning if the subscript expression (as identified by the
12462 // ']' location) and the index expression are both from macro expansions
12463 // within a system header.
12464 if (ASE) {
12465 SourceLocation RBracketLoc = SourceMgr.getSpellingLoc(
12466 ASE->getRBracketLoc());
12467 if (SourceMgr.isInSystemHeader(RBracketLoc)) {
12468 SourceLocation IndexLoc =
12469 SourceMgr.getSpellingLoc(IndexExpr->getBeginLoc());
12470 if (SourceMgr.isWrittenInSameFile(RBracketLoc, IndexLoc))
12471 return;
12472 }
12473 }
12474
12475 unsigned DiagID = diag::warn_ptr_arith_exceeds_bounds;
12476 if (ASE)
12477 DiagID = diag::warn_array_index_exceeds_bounds;
12478
12479 DiagRuntimeBehavior(BaseExpr->getBeginLoc(), BaseExpr,
12480 PDiag(DiagID) << index.toString(10, true)
12481 << size.toString(10, true)
12482 << (unsigned)size.getLimitedValue(~0U)
12483 << IndexExpr->getSourceRange());
12484 } else {
12485 unsigned DiagID = diag::warn_array_index_precedes_bounds;
12486 if (!ASE) {
12487 DiagID = diag::warn_ptr_arith_precedes_bounds;
12488 if (index.isNegative()) index = -index;
12489 }
12490
12491 DiagRuntimeBehavior(BaseExpr->getBeginLoc(), BaseExpr,
12492 PDiag(DiagID) << index.toString(10, true)
12493 << IndexExpr->getSourceRange());
12494 }
12495
12496 if (!ND) {
12497 // Try harder to find a NamedDecl to point at in the note.
12498 while (const ArraySubscriptExpr *ASE =
12499 dyn_cast<ArraySubscriptExpr>(BaseExpr))
12500 BaseExpr = ASE->getBase()->IgnoreParenCasts();
12501 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
12502 ND = DRE->getDecl();
12503 if (const MemberExpr *ME = dyn_cast<MemberExpr>(BaseExpr))
12504 ND = ME->getMemberDecl();
12505 }
12506
12507 if (ND)
12508 DiagRuntimeBehavior(ND->getBeginLoc(), BaseExpr,
12509 PDiag(diag::note_array_index_out_of_bounds)
12510 << ND->getDeclName());
12511 }
12512
12513 void Sema::CheckArrayAccess(const Expr *expr) {
12514 int AllowOnePastEnd = 0;
12515 while (expr) {
12516 expr = expr->IgnoreParenImpCasts();
12517 switch (expr->getStmtClass()) {
12518 case Stmt::ArraySubscriptExprClass: {
12519 const ArraySubscriptExpr *ASE = cast<ArraySubscriptExpr>(expr);
12520 CheckArrayAccess(ASE->getBase(), ASE->getIdx(), ASE,
12521 AllowOnePastEnd > 0);
12522 expr = ASE->getBase();
12523 break;
12524 }
12525 case Stmt::MemberExprClass: {
12526 expr = cast<MemberExpr>(expr)->getBase();
12527 break;
12528 }
12529 case Stmt::OMPArraySectionExprClass: {
12530 const OMPArraySectionExpr *ASE = cast<OMPArraySectionExpr>(expr);
12531 if (ASE->getLowerBound())
12532 CheckArrayAccess(ASE->getBase(), ASE->getLowerBound(),
12533 /*ASE=*/nullptr, AllowOnePastEnd > 0);
12534 return;
12535 }
12536 case Stmt::UnaryOperatorClass: {
12537 // Only unwrap the * and & unary operators
12538 const UnaryOperator *UO = cast<UnaryOperator>(expr);
12539 expr = UO->getSubExpr();
12540 switch (UO->getOpcode()) {
12541 case UO_AddrOf:
12542 AllowOnePastEnd++;
12543 break;
12544 case UO_Deref:
12545 AllowOnePastEnd--;
12546 break;
12547 default:
12548 return;
12549 }
12550 break;
12551 }
12552 case Stmt::ConditionalOperatorClass: {
12553 const ConditionalOperator *cond = cast<ConditionalOperator>(expr);
12554 if (const Expr *lhs = cond->getLHS())
12555 CheckArrayAccess(lhs);
12556 if (const Expr *rhs = cond->getRHS())
12557 CheckArrayAccess(rhs);
12558 return;
12559 }
12560 case Stmt::CXXOperatorCallExprClass: {
12561 const auto *OCE = cast<CXXOperatorCallExpr>(expr);
12562 for (const auto *Arg : OCE->arguments())
12563 CheckArrayAccess(Arg);
12564 return;
12565 }
12566 default:
12567 return;
12568 }
12569 }
12570 }
12571
12572 //===--- CHECK: Objective-C retain cycles ----------------------------------//
12573
12574 namespace {
12575
12576 struct RetainCycleOwner {
12577 VarDecl *Variable = nullptr;
12578 SourceRange Range;
12579 SourceLocation Loc;
12580 bool Indirect = false;
12581
12582 RetainCycleOwner() = default;
12583
12584 void setLocsFrom(Expr *e) {
12585 Loc = e->getExprLoc();
12586 Range = e->getSourceRange();
12587 }
12588 };
12589
12590 } // namespace
12591
12592 /// Consider whether capturing the given variable can possibly lead to
12593 /// a retain cycle.
12594 static bool considerVariable(VarDecl *var, Expr *ref, RetainCycleOwner &owner) {
12595 // In ARC, it's captured strongly iff the variable has __strong
12596 // lifetime. In MRR, it's captured strongly if the variable is
12597 // __block and has an appropriate type.
12598 if (var->getType().getObjCLifetime() != Qualifiers::OCL_Strong)
12599 return false;
12600
12601 owner.Variable = var;
12602 if (ref)
12603 owner.setLocsFrom(ref);
12604 return true;
12605 }
12606
12607 static bool findRetainCycleOwner(Sema &S, Expr *e, RetainCycleOwner &owner) {
12608 while (true) {
12609 e = e->IgnoreParens();
12610 if (CastExpr *cast = dyn_cast<CastExpr>(e)) {
12611 switch (cast->getCastKind()) {
12612 case CK_BitCast:
12613 case CK_LValueBitCast:
12614 case CK_LValueToRValue:
12615 case CK_ARCReclaimReturnedObject:
12616 e = cast->getSubExpr();
12617 continue;
12618
12619 default:
12620 return false;
12621 }
12622 }
12623
12624 if (ObjCIvarRefExpr *ref = dyn_cast<ObjCIvarRefExpr>(e)) {
12625 ObjCIvarDecl *ivar = ref->getDecl();
12626 if (ivar->getType().getObjCLifetime() != Qualifiers::OCL_Strong)
12627 return false;
12628
12629 // Try to find a retain cycle in the base.
12630 if (!findRetainCycleOwner(S, ref->getBase(), owner))
12631 return false;
12632
12633 if (ref->isFreeIvar()) owner.setLocsFrom(ref);
12634 owner.Indirect = true;
12635 return true;
12636 }
12637
12638 if (DeclRefExpr *ref = dyn_cast<DeclRefExpr>(e)) {
12639 VarDecl *var = dyn_cast<VarDecl>(ref->getDecl());
12640 if (!var) return false;
12641 return considerVariable(var, ref, owner);
12642 }
12643
12644 if (MemberExpr *member = dyn_cast<MemberExpr>(e)) {
12645 if (member->isArrow()) return false;
12646
12647 // Don't count this as an indirect ownership.
12648 e = member->getBase();
12649 continue;
12650 }
12651
12652 if (PseudoObjectExpr *pseudo = dyn_cast<PseudoObjectExpr>(e)) {
12653 // Only pay attention to pseudo-objects on property references.
12654 ObjCPropertyRefExpr *pre
12655 = dyn_cast<ObjCPropertyRefExpr>(pseudo->getSyntacticForm()
12656 ->IgnoreParens());
12657 if (!pre) return false;
12658 if (pre->isImplicitProperty()) return false;
12659 ObjCPropertyDecl *property = pre->getExplicitProperty();
12660 if (!property->isRetaining() &&
12661 !(property->getPropertyIvarDecl() &&
12662 property->getPropertyIvarDecl()->getType()
12663 .getObjCLifetime() == Qualifiers::OCL_Strong))
12664 return false;
12665
12666 owner.Indirect = true;
12667 if (pre->isSuperReceiver()) {
12668 owner.Variable = S.getCurMethodDecl()->getSelfDecl();
12669 if (!owner.Variable)
12670 return false;
12671 owner.Loc = pre->getLocation();
12672 owner.Range = pre->getSourceRange();
12673 return true;
12674 }
12675 e = const_cast<Expr*>(cast<OpaqueValueExpr>(pre->getBase())
12676 ->getSourceExpr());
12677 continue;
12678 }
12679
12680 // Array ivars?
12681
12682 return false;
12683 }
12684 }
12685
12686 namespace {
12687
12688 struct FindCaptureVisitor : EvaluatedExprVisitor<FindCaptureVisitor> {
12689 ASTContext &Context;
12690 VarDecl *Variable;
12691 Expr *Capturer = nullptr;
12692 bool VarWillBeReased = false;
12693
12694 FindCaptureVisitor(ASTContext &Context, VarDecl *variable)
12695 : EvaluatedExprVisitor<FindCaptureVisitor>(Context),
12696 Context(Context), Variable(variable) {}
12697
12698 void VisitDeclRefExpr(DeclRefExpr *ref) {
12699 if (ref->getDecl() == Variable && !Capturer)
12700 Capturer = ref;
12701 }
12702
12703 void VisitObjCIvarRefExpr(ObjCIvarRefExpr *ref) {
12704 if (Capturer) return;
12705 Visit(ref->getBase());
12706 if (Capturer && ref->isFreeIvar())
12707 Capturer = ref;
12708 }
12709
12710 void VisitBlockExpr(BlockExpr *block) {
12711 // Look inside nested blocks
12712 if (block->getBlockDecl()->capturesVariable(Variable))
12713 Visit(block->getBlockDecl()->getBody());
12714 }
12715
12716 void VisitOpaqueValueExpr(OpaqueValueExpr *OVE) {
12717 if (Capturer) return;
12718 if (OVE->getSourceExpr())
12719 Visit(OVE->getSourceExpr());
12720 }
12721
12722 void VisitBinaryOperator(BinaryOperator *BinOp) {
12723 if (!Variable || VarWillBeReased || BinOp->getOpcode() != BO_Assign)
12724 return;
12725 Expr *LHS = BinOp->getLHS();
12726 if (const DeclRefExpr *DRE = dyn_cast_or_null<DeclRefExpr>(LHS)) {
12727 if (DRE->getDecl() != Variable)
12728 return;
12729 if (Expr *RHS = BinOp->getRHS()) {
12730 RHS = RHS->IgnoreParenCasts();
12731 llvm::APSInt Value;
12732 VarWillBeReased =
12733 (RHS && RHS->isIntegerConstantExpr(Value, Context) && Value == 0);
12734 }
12735 }
12736 }
12737 };
12738
12739 } // namespace
12740
12741 /// Check whether the given argument is a block which captures a
12742 /// variable.
12743 static Expr *findCapturingExpr(Sema &S, Expr *e, RetainCycleOwner &owner) {
12744 assert(owner.Variable && owner.Loc.isValid());
12745
12746 e = e->IgnoreParenCasts();
12747
12748 // Look through [^{...} copy] and Block_copy(^{...}).
12749 if (ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(e)) {
12750 Selector Cmd = ME->getSelector();
12751 if (Cmd.isUnarySelector() && Cmd.getNameForSlot(0) == "copy") {
12752 e = ME->getInstanceReceiver();
12753 if (!e)
12754 return nullptr;
12755 e = e->IgnoreParenCasts();
12756 }
12757 } else if (CallExpr *CE = dyn_cast<CallExpr>(e)) {
12758 if (CE->getNumArgs() == 1) {
12759 FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(CE->getCalleeDecl());
12760 if (Fn) {
12761 const IdentifierInfo *FnI = Fn->getIdentifier();
12762 if (FnI && FnI->isStr("_Block_copy")) {
12763 e = CE->getArg(0)->IgnoreParenCasts();
12764 }
12765 }
12766 }
12767 }
12768
12769 BlockExpr *block = dyn_cast<BlockExpr>(e);
12770 if (!block || !block->getBlockDecl()->capturesVariable(owner.Variable))
12771 return nullptr;
12772
12773 FindCaptureVisitor visitor(S.Context, owner.Variable);
12774 visitor.Visit(block->getBlockDecl()->getBody());
12775 return visitor.VarWillBeReased ? nullptr : visitor.Capturer;
12776 }
12777
12778 static void diagnoseRetainCycle(Sema &S, Expr *capturer,
12779 RetainCycleOwner &owner) {
12780 assert(capturer);
12781 assert(owner.Variable && owner.Loc.isValid());
12782
12783 S.Diag(capturer->getExprLoc(), diag::warn_arc_retain_cycle)
12784 << owner.Variable << capturer->getSourceRange();
12785 S.Diag(owner.Loc, diag::note_arc_retain_cycle_owner)
12786 << owner.Indirect << owner.Range;
12787 }
12788
12789 /// Check for a keyword selector that starts with the word 'add' or
12790 /// 'set'.
12791 static bool isSetterLikeSelector(Selector sel) {
12792 if (sel.isUnarySelector()) return false;
12793
12794 StringRef str = sel.getNameForSlot(0);
12795 while (!str.empty() && str.front() == '_') str = str.substr(1);
12796 if (str.startswith("set"))
12797 str = str.substr(3);
12798 else if (str.startswith("add")) {
12799 // Specially whitelist 'addOperationWithBlock:'.
12800 if (sel.getNumArgs() == 1 && str.startswith("addOperationWithBlock"))
12801 return false;
12802 str = str.substr(3);
12803 }
12804 else
12805 return false;
12806
12807 if (str.empty()) return true;
12808 return !isLowercase(str.front());
12809 }
12810
12811 static Optional<int> GetNSMutableArrayArgumentIndex(Sema &S,
12812 ObjCMessageExpr *Message) {
12813 bool IsMutableArray = S.NSAPIObj->isSubclassOfNSClass(
12814 Message->getReceiverInterface(),
12815 NSAPI::ClassId_NSMutableArray);
12816 if (!IsMutableArray) {
12817 return None;
12818 }
12819
12820 Selector Sel = Message->getSelector();
12821
12822 Optional<NSAPI::NSArrayMethodKind> MKOpt =
12823 S.NSAPIObj->getNSArrayMethodKind(Sel);
12824 if (!MKOpt) {
12825 return None;
12826 }
12827
12828 NSAPI::NSArrayMethodKind MK = *MKOpt;
12829
12830 switch (MK) {
12831 case NSAPI::NSMutableArr_addObject:
12832 case NSAPI::NSMutableArr_insertObjectAtIndex:
12833 case NSAPI::NSMutableArr_setObjectAtIndexedSubscript:
12834 return 0;
12835 case NSAPI::NSMutableArr_replaceObjectAtIndex:
12836 return 1;
12837
12838 default:
12839 return None;
12840 }
12841
12842 return None;
12843 }
12844
12845 static
12846 Optional<int> GetNSMutableDictionaryArgumentIndex(Sema &S,
12847 ObjCMessageExpr *Message) {
12848 bool IsMutableDictionary = S.NSAPIObj->isSubclassOfNSClass(
12849 Message->getReceiverInterface(),
12850 NSAPI::ClassId_NSMutableDictionary);
12851 if (!IsMutableDictionary) {
12852 return None;
12853 }
12854
12855 Selector Sel = Message->getSelector();
12856
12857 Optional<NSAPI::NSDictionaryMethodKind> MKOpt =
12858 S.NSAPIObj->getNSDictionaryMethodKind(Sel);
12859 if (!MKOpt) {
12860 return None;
12861 }
12862
12863 NSAPI::NSDictionaryMethodKind MK = *MKOpt;
12864
12865 switch (MK) {
12866 case NSAPI::NSMutableDict_setObjectForKey:
12867 case NSAPI::NSMutableDict_setValueForKey:
12868 case NSAPI::NSMutableDict_setObjectForKeyedSubscript:
12869 return 0;
12870
12871 default:
12872 return None;
12873 }
12874
12875 return None;
12876 }
12877
12878 static Optional<int> GetNSSetArgumentIndex(Sema &S, ObjCMessageExpr *Message) {
12879 bool IsMutableSet = S.NSAPIObj->isSubclassOfNSClass(
12880 Message->getReceiverInterface(),
12881 NSAPI::ClassId_NSMutableSet);
12882
12883 bool IsMutableOrderedSet = S.NSAPIObj->isSubclassOfNSClass(
12884 Message->getReceiverInterface(),
12885 NSAPI::ClassId_NSMutableOrderedSet);
12886 if (!IsMutableSet && !IsMutableOrderedSet) {
12887 return None;
12888 }
12889
12890 Selector Sel = Message->getSelector();
12891
12892 Optional<NSAPI::NSSetMethodKind> MKOpt = S.NSAPIObj->getNSSetMethodKind(Sel);
12893 if (!MKOpt) {
12894 return None;
12895 }
12896
12897 NSAPI::NSSetMethodKind MK = *MKOpt;
12898
12899 switch (MK) {
12900 case NSAPI::NSMutableSet_addObject:
12901 case NSAPI::NSOrderedSet_setObjectAtIndex:
12902 case NSAPI::NSOrderedSet_setObjectAtIndexedSubscript:
12903 case NSAPI::NSOrderedSet_insertObjectAtIndex:
12904 return 0;
12905 case NSAPI::NSOrderedSet_replaceObjectAtIndexWithObject:
12906 return 1;
12907 }
12908
12909 return None;
12910 }
12911
12912 void Sema::CheckObjCCircularContainer(ObjCMessageExpr *Message) {
12913 if (!Message->isInstanceMessage()) {
12914 return;
12915 }
12916
12917 Optional<int> ArgOpt;
12918
12919 if (!(ArgOpt = GetNSMutableArrayArgumentIndex(*this, Message)) &&
12920 !(ArgOpt = GetNSMutableDictionaryArgumentIndex(*this, Message)) &&
12921 !(ArgOpt = GetNSSetArgumentIndex(*this, Message))) {
12922 return;
12923 }
12924
12925 int ArgIndex = *ArgOpt;
12926
12927 Expr *Arg = Message->getArg(ArgIndex)->IgnoreImpCasts();
12928 if (OpaqueValueExpr *OE = dyn_cast<OpaqueValueExpr>(Arg)) {
12929 Arg = OE->getSourceExpr()->IgnoreImpCasts();
12930 }
12931
12932 if (Message->getReceiverKind() == ObjCMessageExpr::SuperInstance) {
12933 if (DeclRefExpr *ArgRE = dyn_cast<DeclRefExpr>(Arg)) {
12934 if (ArgRE->isObjCSelfExpr()) {
12935 Diag(Message->getSourceRange().getBegin(),
12936 diag::warn_objc_circular_container)
12937 << ArgRE->getDecl() << StringRef("'super'");
12938 }
12939 }
12940 } else {
12941 Expr *Receiver = Message->getInstanceReceiver()->IgnoreImpCasts();
12942
12943 if (OpaqueValueExpr *OE = dyn_cast<OpaqueValueExpr>(Receiver)) {
12944 Receiver = OE->getSourceExpr()->IgnoreImpCasts();
12945 }
12946
12947 if (DeclRefExpr *ReceiverRE = dyn_cast<DeclRefExpr>(Receiver)) {
12948 if (DeclRefExpr *ArgRE = dyn_cast<DeclRefExpr>(Arg)) {
12949 if (ReceiverRE->getDecl() == ArgRE->getDecl()) {
12950 ValueDecl *Decl = ReceiverRE->getDecl();
12951 Diag(Message->getSourceRange().getBegin(),
12952 diag::warn_objc_circular_container)
12953 << Decl << Decl;
12954 if (!ArgRE->isObjCSelfExpr()) {
12955 Diag(Decl->getLocation(),
12956 diag::note_objc_circular_container_declared_here)
12957 << Decl;
12958 }
12959 }
12960 }
12961 } else if (ObjCIvarRefExpr *IvarRE = dyn_cast<ObjCIvarRefExpr>(Receiver)) {
12962 if (ObjCIvarRefExpr *IvarArgRE = dyn_cast<ObjCIvarRefExpr>(Arg)) {
12963 if (IvarRE->getDecl() == IvarArgRE->getDecl()) {
12964 ObjCIvarDecl *Decl = IvarRE->getDecl();
12965 Diag(Message->getSourceRange().getBegin(),
12966 diag::warn_objc_circular_container)
12967 << Decl << Decl;
12968 Diag(Decl->getLocation(),
12969 diag::note_objc_circular_container_declared_here)
12970 << Decl;
12971 }
12972 }
12973 }
12974 }
12975 }
12976
12977 /// Check a message send to see if it's likely to cause a retain cycle.
12978 void Sema::checkRetainCycles(ObjCMessageExpr *msg) {
12979 // Only check instance methods whose selector looks like a setter.
12980 if (!msg->isInstanceMessage() || !isSetterLikeSelector(msg->getSelector()))
12981 return;
12982
12983 // Try to find a variable that the receiver is strongly owned by.
12984 RetainCycleOwner owner;
12985 if (msg->getReceiverKind() == ObjCMessageExpr::Instance) {
12986 if (!findRetainCycleOwner(*this, msg->getInstanceReceiver(), owner))
12987 return;
12988 } else {
12989 assert(msg->getReceiverKind() == ObjCMessageExpr::SuperInstance);
12990 owner.Variable = getCurMethodDecl()->getSelfDecl();
12991 owner.Loc = msg->getSuperLoc();
12992 owner.Range = msg->getSuperLoc();
12993 }
12994
12995 // Check whether the receiver is captured by any of the arguments.
12996 const ObjCMethodDecl *MD = msg->getMethodDecl();
12997 for (unsigned i = 0, e = msg->getNumArgs(); i != e; ++i) {
12998 if (Expr *capturer = findCapturingExpr(*this, msg->getArg(i), owner)) {
12999 // noescape blocks should not be retained by the method.
13000 if (MD && MD->parameters()[i]->hasAttr<NoEscapeAttr>())
13001 continue;
13002 return diagnoseRetainCycle(*this, capturer, owner);
13003 }
13004 }
13005 }
13006
13007 /// Check a property assign to see if it's likely to cause a retain cycle.
13008 void Sema::checkRetainCycles(Expr *receiver, Expr *argument) {
13009 RetainCycleOwner owner;
13010 if (!findRetainCycleOwner(*this, receiver, owner))
13011 return;
13012
13013 if (Expr *capturer = findCapturingExpr(*this, argument, owner))
13014 diagnoseRetainCycle(*this, capturer, owner);
13015 }
13016
13017 void Sema::checkRetainCycles(VarDecl *Var, Expr *Init) {
13018 RetainCycleOwner Owner;
13019 if (!considerVariable(Var, /*DeclRefExpr=*/nullptr, Owner))
13020 return;
13021
13022 // Because we don't have an expression for the variable, we have to set the
13023 // location explicitly here.
13024 Owner.Loc = Var->getLocation();
13025 Owner.Range = Var->getSourceRange();
13026
13027 if (Expr *Capturer = findCapturingExpr(*this, Init, Owner))
13028 diagnoseRetainCycle(*this, Capturer, Owner);
13029 }
13030
13031 static bool checkUnsafeAssignLiteral(Sema &S, SourceLocation Loc,
13032 Expr *RHS, bool isProperty) {
13033 // Check if RHS is an Objective-C object literal, which also can get
13034 // immediately zapped in a weak reference. Note that we explicitly
13035 // allow ObjCStringLiterals, since those are designed to never really die.
13036 RHS = RHS->IgnoreParenImpCasts();
13037
13038 // This enum needs to match with the 'select' in
13039 // warn_objc_arc_literal_assign (off-by-1).
13040 Sema::ObjCLiteralKind Kind = S.CheckLiteralKind(RHS);
13041 if (Kind == Sema::LK_String || Kind == Sema::LK_None)
13042 return false;
13043
13044 S.Diag(Loc, diag::warn_arc_literal_assign)
13045 << (unsigned) Kind
13046 << (isProperty ? 0 : 1)
13047 << RHS->getSourceRange();
13048
13049 return true;
13050 }
13051
13052 static bool checkUnsafeAssignObject(Sema &S, SourceLocation Loc,
13053 Qualifiers::ObjCLifetime LT,
13054 Expr *RHS, bool isProperty) {
13055 // Strip off any implicit cast added to get to the one ARC-specific.
13056 while (ImplicitCastExpr *cast = dyn_cast<ImplicitCastExpr>(RHS)) {
13057 if (cast->getCastKind() == CK_ARCConsumeObject) {
13058 S.Diag(Loc, diag::warn_arc_retained_assign)
13059 << (LT == Qualifiers::OCL_ExplicitNone)
13060 << (isProperty ? 0 : 1)
13061 << RHS->getSourceRange();
13062 return true;
13063 }
13064 RHS = cast->getSubExpr();
13065 }
13066
13067 if (LT == Qualifiers::OCL_Weak &&
13068 checkUnsafeAssignLiteral(S, Loc, RHS, isProperty))
13069 return true;
13070
13071 return false;
13072 }
13073
13074 bool Sema::checkUnsafeAssigns(SourceLocation Loc,
13075 QualType LHS, Expr *RHS) {
13076 Qualifiers::ObjCLifetime LT = LHS.getObjCLifetime();
13077
13078 if (LT != Qualifiers::OCL_Weak && LT != Qualifiers::OCL_ExplicitNone)
13079 return false;
13080
13081 if (checkUnsafeAssignObject(*this, Loc, LT, RHS, false))
13082 return true;
13083
13084 return false;
13085 }
13086
13087 void Sema::checkUnsafeExprAssigns(SourceLocation Loc,
13088 Expr *LHS, Expr *RHS) {
13089 QualType LHSType;
13090 // PropertyRef on LHS type need be directly obtained from
13091 // its declaration as it has a PseudoType.
13092 ObjCPropertyRefExpr *PRE
13093 = dyn_cast<ObjCPropertyRefExpr>(LHS->IgnoreParens());
13094 if (PRE && !PRE->isImplicitProperty()) {
13095 const ObjCPropertyDecl *PD = PRE->getExplicitProperty();
13096 if (PD)
13097 LHSType = PD->getType();
13098 }
13099
13100 if (LHSType.isNull())
13101 LHSType = LHS->getType();
13102
13103 Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
13104
13105 if (LT == Qualifiers::OCL_Weak) {
13106 if (!Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, Loc))
13107 getCurFunction()->markSafeWeakUse(LHS);
13108 }
13109
13110 if (checkUnsafeAssigns(Loc, LHSType, RHS))
13111 return;
13112
13113 // FIXME. Check for other life times.
13114 if (LT != Qualifiers::OCL_None)
13115 return;
13116
13117 if (PRE) {
13118 if (PRE->isImplicitProperty())
13119 return;
13120 const ObjCPropertyDecl *PD = PRE->getExplicitProperty();
13121 if (!PD)
13122 return;
13123
13124 unsigned Attributes = PD->getPropertyAttributes();
13125 if (Attributes & ObjCPropertyDecl::OBJC_PR_assign) {
13126 // when 'assign' attribute was not explicitly specified
13127 // by user, ignore it and rely on property type itself
13128 // for lifetime info.
13129 unsigned AsWrittenAttr = PD->getPropertyAttributesAsWritten();
13130 if (!(AsWrittenAttr & ObjCPropertyDecl::OBJC_PR_assign) &&
13131 LHSType->isObjCRetainableType())
13132 return;
13133
13134 while (ImplicitCastExpr *cast = dyn_cast<ImplicitCastExpr>(RHS)) {
13135 if (cast->getCastKind() == CK_ARCConsumeObject) {
13136 Diag(Loc, diag::warn_arc_retained_property_assign)
13137 << RHS->getSourceRange();
13138 return;
13139 }
13140 RHS = cast->getSubExpr();
13141 }
13142 }
13143 else if (Attributes & ObjCPropertyDecl::OBJC_PR_weak) {
13144 if (checkUnsafeAssignObject(*this, Loc, Qualifiers::OCL_Weak, RHS, true))
13145 return;
13146 }
13147 }
13148 }
13149
13150 //===--- CHECK: Empty statement body (-Wempty-body) ---------------------===//
13151
13152 static bool ShouldDiagnoseEmptyStmtBody(const SourceManager &SourceMgr,
13153 SourceLocation StmtLoc,
13154 const NullStmt *Body) {
13155 // Do not warn if the body is a macro that expands to nothing, e.g:
13156 //
13157 // #define CALL(x)
13158 // if (condition)
13159 // CALL(0);
13160 if (Body->hasLeadingEmptyMacro())
13161 return false;
13162
13163 // Get line numbers of statement and body.
13164 bool StmtLineInvalid;
13165 unsigned StmtLine = SourceMgr.getPresumedLineNumber(StmtLoc,
13166 &StmtLineInvalid);
13167 if (StmtLineInvalid)
13168 return false;
13169
13170 bool BodyLineInvalid;
13171 unsigned BodyLine = SourceMgr.getSpellingLineNumber(Body->getSemiLoc(),
13172 &BodyLineInvalid);
13173 if (BodyLineInvalid)
13174 return false;
13175
13176 // Warn if null statement and body are on the same line.
13177 if (StmtLine != BodyLine)
13178 return false;
13179
13180 return true;
13181 }
13182
13183 void Sema::DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
13184 const Stmt *Body,
13185 unsigned DiagID) {
13186 // Since this is a syntactic check, don't emit diagnostic for template
13187 // instantiations, this just adds noise.
13188 if (CurrentInstantiationScope)
13189 return;
13190
13191 // The body should be a null statement.
13192 const NullStmt *NBody = dyn_cast<NullStmt>(Body);
13193 if (!NBody)
13194 return;
13195
13196 // Do the usual checks.
13197 if (!ShouldDiagnoseEmptyStmtBody(SourceMgr, StmtLoc, NBody))
13198 return;
13199
13200 Diag(NBody->getSemiLoc(), DiagID);
13201 Diag(NBody->getSemiLoc(), diag::note_empty_body_on_separate_line);
13202 }
13203
13204 void Sema::DiagnoseEmptyLoopBody(const Stmt *S,
13205 const Stmt *PossibleBody) {
13206 assert(!CurrentInstantiationScope); // Ensured by caller
13207
13208 SourceLocation StmtLoc;
13209 const Stmt *Body;
13210 unsigned DiagID;
13211 if (const ForStmt *FS = dyn_cast<ForStmt>(S)) {
13212 StmtLoc = FS->getRParenLoc();
13213 Body = FS->getBody();
13214 DiagID = diag::warn_empty_for_body;
13215 } else if (const WhileStmt *WS = dyn_cast<WhileStmt>(S)) {
13216 StmtLoc = WS->getCond()->getSourceRange().getEnd();
13217 Body = WS->getBody();
13218 DiagID = diag::warn_empty_while_body;
13219 } else
13220 return; // Neither `for' nor `while'.
13221
13222 // The body should be a null statement.
13223 const NullStmt *NBody = dyn_cast<NullStmt>(Body);
13224 if (!NBody)
13225 return;
13226
13227 // Skip expensive checks if diagnostic is disabled.
13228 if (Diags.isIgnored(DiagID, NBody->getSemiLoc()))
13229 return;
13230
13231 // Do the usual checks.
13232 if (!ShouldDiagnoseEmptyStmtBody(SourceMgr, StmtLoc, NBody))
13233 return;
13234
13235 // `for(...);' and `while(...);' are popular idioms, so in order to keep
13236 // noise level low, emit diagnostics only if for/while is followed by a
13237 // CompoundStmt, e.g.:
13238 // for (int i = 0; i < n; i++);
13239 // {
13240 // a(i);
13241 // }
13242 // or if for/while is followed by a statement with more indentation
13243 // than for/while itself:
13244 // for (int i = 0; i < n; i++);
13245 // a(i);
13246 bool ProbableTypo = isa<CompoundStmt>(PossibleBody);
13247 if (!ProbableTypo) {
13248 bool BodyColInvalid;
13249 unsigned BodyCol = SourceMgr.getPresumedColumnNumber(
13250 PossibleBody->getBeginLoc(), &BodyColInvalid);
13251 if (BodyColInvalid)
13252 return;
13253
13254 bool StmtColInvalid;
13255 unsigned StmtCol =
13256 SourceMgr.getPresumedColumnNumber(S->getBeginLoc(), &StmtColInvalid);
13257 if (StmtColInvalid)
13258 return;
13259
13260 if (BodyCol > StmtCol)
13261 ProbableTypo = true;
13262 }
13263
13264 if (ProbableTypo) {
13265 Diag(NBody->getSemiLoc(), DiagID);
13266 Diag(NBody->getSemiLoc(), diag::note_empty_body_on_separate_line);
13267 }
13268 }
13269
13270 //===--- CHECK: Warn on self move with std::move. -------------------------===//
13271
13272 /// DiagnoseSelfMove - Emits a warning if a value is moved to itself.
13273 void Sema::DiagnoseSelfMove(const Expr *LHSExpr, const Expr *RHSExpr,
13274 SourceLocation OpLoc) {
13275 if (Diags.isIgnored(diag::warn_sizeof_pointer_expr_memaccess, OpLoc))
13276 return;
13277
13278 if (inTemplateInstantiation())
13279 return;
13280
13281 // Strip parens and casts away.
13282 LHSExpr = LHSExpr->IgnoreParenImpCasts();
13283 RHSExpr = RHSExpr->IgnoreParenImpCasts();
13284
13285 // Check for a call expression
13286 const CallExpr *CE = dyn_cast<CallExpr>(RHSExpr);
13287 if (!CE || CE->getNumArgs() != 1)
13288 return;
13289
13290 // Check for a call to std::move
13291 if (!CE->isCallToStdMove())
13292 return;
13293
13294 // Get argument from std::move
13295 RHSExpr = CE->getArg(0);
13296
13297 const DeclRefExpr *LHSDeclRef = dyn_cast<DeclRefExpr>(LHSExpr);
13298 const DeclRefExpr *RHSDeclRef = dyn_cast<DeclRefExpr>(RHSExpr);
13299
13300 // Two DeclRefExpr's, check that the decls are the same.
13301 if (LHSDeclRef && RHSDeclRef) {
13302 if (!LHSDeclRef->getDecl() || !RHSDeclRef->getDecl())
13303 return;
13304 if (LHSDeclRef->getDecl()->getCanonicalDecl() !=
13305 RHSDeclRef->getDecl()->getCanonicalDecl())
13306 return;
13307
13308 Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
13309 << LHSExpr->getSourceRange()
13310 << RHSExpr->getSourceRange();
13311 return;
13312 }
13313
13314 // Member variables require a different approach to check for self moves.
13315 // MemberExpr's are the same if every nested MemberExpr refers to the same
13316 // Decl and that the base Expr's are DeclRefExpr's with the same Decl or
13317 // the base Expr's are CXXThisExpr's.
13318 const Expr *LHSBase = LHSExpr;
13319 const Expr *RHSBase = RHSExpr;
13320 const MemberExpr *LHSME = dyn_cast<MemberExpr>(LHSExpr);
13321 const MemberExpr *RHSME = dyn_cast<MemberExpr>(RHSExpr);
13322 if (!LHSME || !RHSME)
13323 return;
13324
13325 while (LHSME && RHSME) {
13326 if (LHSME->getMemberDecl()->getCanonicalDecl() !=
13327 RHSME->getMemberDecl()->getCanonicalDecl())
13328 return;
13329
13330 LHSBase = LHSME->getBase();
13331 RHSBase = RHSME->getBase();
13332 LHSME = dyn_cast<MemberExpr>(LHSBase);
13333 RHSME = dyn_cast<MemberExpr>(RHSBase);
13334 }
13335
13336 LHSDeclRef = dyn_cast<DeclRefExpr>(LHSBase);
13337 RHSDeclRef = dyn_cast<DeclRefExpr>(RHSBase);
13338 if (LHSDeclRef && RHSDeclRef) {
13339 if (!LHSDeclRef->getDecl() || !RHSDeclRef->getDecl())
13340 return;
13341 if (LHSDeclRef->getDecl()->getCanonicalDecl() !=
13342 RHSDeclRef->getDecl()->getCanonicalDecl())
13343 return;
13344
13345 Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
13346 << LHSExpr->getSourceRange()
13347 << RHSExpr->getSourceRange();
13348 return;
13349 }
13350
13351 if (isa<CXXThisExpr>(LHSBase) && isa<CXXThisExpr>(RHSBase))
13352 Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
13353 << LHSExpr->getSourceRange()
13354 << RHSExpr->getSourceRange();
13355 }
13356
13357 //===--- Layout compatibility ----------------------------------------------//
13358
13359 static bool isLayoutCompatible(ASTContext &C, QualType T1, QualType T2);
13360
13361 /// Check if two enumeration types are layout-compatible.
13362 static bool isLayoutCompatible(ASTContext &C, EnumDecl *ED1, EnumDecl *ED2) {
13363 // C++11 [dcl.enum] p8:
13364 // Two enumeration types are layout-compatible if they have the same
13365 // underlying type.
13366 return ED1->isComplete() && ED2->isComplete() &&
13367 C.hasSameType(ED1->getIntegerType(), ED2->getIntegerType());
13368 }
13369
13370 /// Check if two fields are layout-compatible.
13371 static bool isLayoutCompatible(ASTContext &C, FieldDecl *Field1,
13372 FieldDecl *Field2) {
13373 if (!isLayoutCompatible(C, Field1->getType(), Field2->getType()))
13374 return false;
13375
13376 if (Field1->isBitField() != Field2->isBitField())
13377 return false;
13378
13379 if (Field1->isBitField()) {
13380 // Make sure that the bit-fields are the same length.
13381 unsigned Bits1 = Field1->getBitWidthValue(C);
13382 unsigned Bits2 = Field2->getBitWidthValue(C);
13383
13384 if (Bits1 != Bits2)
13385 return false;
13386 }
13387
13388 return true;
13389 }
13390
13391 /// Check if two standard-layout structs are layout-compatible.
13392 /// (C++11 [class.mem] p17)
13393 static bool isLayoutCompatibleStruct(ASTContext &C, RecordDecl *RD1,
13394 RecordDecl *RD2) {
13395 // If both records are C++ classes, check that base classes match.
13396 if (const CXXRecordDecl *D1CXX = dyn_cast<CXXRecordDecl>(RD1)) {
13397 // If one of records is a CXXRecordDecl we are in C++ mode,
13398 // thus the other one is a CXXRecordDecl, too.
13399 const CXXRecordDecl *D2CXX = cast<CXXRecordDecl>(RD2);
13400 // Check number of base classes.
13401 if (D1CXX->getNumBases() != D2CXX->getNumBases())
13402 return false;
13403
13404 // Check the base classes.
13405 for (CXXRecordDecl::base_class_const_iterator
13406 Base1 = D1CXX->bases_begin(),
13407 BaseEnd1 = D1CXX->bases_end(),
13408 Base2 = D2CXX->bases_begin();
13409 Base1 != BaseEnd1;
13410 ++Base1, ++Base2) {
13411 if (!isLayoutCompatible(C, Base1->getType(), Base2->getType()))
13412 return false;
13413 }
13414 } else if (const CXXRecordDecl *D2CXX = dyn_cast<CXXRecordDecl>(RD2)) {
13415 // If only RD2 is a C++ class, it should have zero base classes.
13416 if (D2CXX->getNumBases() > 0)
13417 return false;
13418 }
13419
13420 // Check the fields.
13421 RecordDecl::field_iterator Field2 = RD2->field_begin(),
13422 Field2End = RD2->field_end(),
13423 Field1 = RD1->field_begin(),
13424 Field1End = RD1->field_end();
13425 for ( ; Field1 != Field1End && Field2 != Field2End; ++Field1, ++Field2) {
13426 if (!isLayoutCompatible(C, *Field1, *Field2))
13427 return false;
13428 }
13429 if (Field1 != Field1End || Field2 != Field2End)
13430 return false;
13431
13432 return true;
13433 }
13434
13435 /// Check if two standard-layout unions are layout-compatible.
13436 /// (C++11 [class.mem] p18)
13437 static bool isLayoutCompatibleUnion(ASTContext &C, RecordDecl *RD1,
13438 RecordDecl *RD2) {
13439 llvm::SmallPtrSet<FieldDecl *, 8> UnmatchedFields;
13440 for (auto *Field2 : RD2->fields())
13441 UnmatchedFields.insert(Field2);
13442
13443 for (auto *Field1 : RD1->fields()) {
13444 llvm::SmallPtrSet<FieldDecl *, 8>::iterator
13445 I = UnmatchedFields.begin(),
13446 E = UnmatchedFields.end();
13447
13448 for ( ; I != E; ++I) {
13449 if (isLayoutCompatible(C, Field1, *I)) {
13450 bool Result = UnmatchedFields.erase(*I);
13451 (void) Result;
13452 assert(Result);
13453 break;
13454 }
13455 }
13456 if (I == E)
13457 return false;
13458 }
13459
13460 return UnmatchedFields.empty();
13461 }
13462
13463 static bool isLayoutCompatible(ASTContext &C, RecordDecl *RD1,
13464 RecordDecl *RD2) {
13465 if (RD1->isUnion() != RD2->isUnion())
13466 return false;
13467
13468 if (RD1->isUnion())
13469 return isLayoutCompatibleUnion(C, RD1, RD2);
13470 else
13471 return isLayoutCompatibleStruct(C, RD1, RD2);
13472 }
13473
13474 /// Check if two types are layout-compatible in C++11 sense.
13475 static bool isLayoutCompatible(ASTContext &C, QualType T1, QualType T2) {
13476 if (T1.isNull() || T2.isNull())
13477 return false;
13478
13479 // C++11 [basic.types] p11:
13480 // If two types T1 and T2 are the same type, then T1 and T2 are
13481 // layout-compatible types.
13482 if (C.hasSameType(T1, T2))
13483 return true;
13484
13485 T1 = T1.getCanonicalType().getUnqualifiedType();
13486 T2 = T2.getCanonicalType().getUnqualifiedType();
13487
13488 const Type::TypeClass TC1 = T1->getTypeClass();
13489 const Type::TypeClass TC2 = T2->getTypeClass();
13490
13491 if (TC1 != TC2)
13492 return false;
13493
13494 if (TC1 == Type::Enum) {
13495 return isLayoutCompatible(C,
13496 cast<EnumType>(T1)->getDecl(),
13497 cast<EnumType>(T2)->getDecl());
13498 } else if (TC1 == Type::Record) {
13499 if (!T1->isStandardLayoutType() || !T2->isStandardLayoutType())
13500 return false;
13501
13502 return isLayoutCompatible(C,
13503 cast<RecordType>(T1)->getDecl(),
13504 cast<RecordType>(T2)->getDecl());
13505 }
13506
13507 return false;
13508 }
13509
13510 //===--- CHECK: pointer_with_type_tag attribute: datatypes should match ----//
13511
13512 /// Given a type tag expression find the type tag itself.
13513 ///
13514 /// \param TypeExpr Type tag expression, as it appears in user's code.
13515 ///
13516 /// \param VD Declaration of an identifier that appears in a type tag.
13517 ///
13518 /// \param MagicValue Type tag magic value.
13519 static bool FindTypeTagExpr(const Expr *TypeExpr, const ASTContext &Ctx,
13520 const ValueDecl **VD, uint64_t *MagicValue) {
13521 while(true) {
13522 if (!TypeExpr)
13523 return false;
13524
13525 TypeExpr = TypeExpr->IgnoreParenImpCasts()->IgnoreParenCasts();
13526
13527 switch (TypeExpr->getStmtClass()) {
13528 case Stmt::UnaryOperatorClass: {
13529 const UnaryOperator *UO = cast<UnaryOperator>(TypeExpr);
13530 if (UO->getOpcode() == UO_AddrOf || UO->getOpcode() == UO_Deref) {
13531 TypeExpr = UO->getSubExpr();
13532 continue;
13533 }
13534 return false;
13535 }
13536
13537 case Stmt::DeclRefExprClass: {
13538 const DeclRefExpr *DRE = cast<DeclRefExpr>(TypeExpr);
13539 *VD = DRE->getDecl();
13540 return true;
13541 }
13542
13543 case Stmt::IntegerLiteralClass: {
13544 const IntegerLiteral *IL = cast<IntegerLiteral>(TypeExpr);
13545 llvm::APInt MagicValueAPInt = IL->getValue();
13546 if (MagicValueAPInt.getActiveBits() <= 64) {
13547 *MagicValue = MagicValueAPInt.getZExtValue();
13548 return true;
13549 } else
13550 return false;
13551 }
13552
13553 case Stmt::BinaryConditionalOperatorClass:
13554 case Stmt::ConditionalOperatorClass: {
13555 const AbstractConditionalOperator *ACO =
13556 cast<AbstractConditionalOperator>(TypeExpr);
13557 bool Result;
13558 if (ACO->getCond()->EvaluateAsBooleanCondition(Result, Ctx)) {
13559 if (Result)
13560 TypeExpr = ACO->getTrueExpr();
13561 else
13562 TypeExpr = ACO->getFalseExpr();
13563 continue;
13564 }
13565 return false;
13566 }
13567
13568 case Stmt::BinaryOperatorClass: {
13569 const BinaryOperator *BO = cast<BinaryOperator>(TypeExpr);
13570 if (BO->getOpcode() == BO_Comma) {
13571 TypeExpr = BO->getRHS();
13572 continue;
13573 }
13574 return false;
13575 }
13576
13577 default:
13578 return false;
13579 }
13580 }
13581 }
13582
13583 /// Retrieve the C type corresponding to type tag TypeExpr.
13584 ///
13585 /// \param TypeExpr Expression that specifies a type tag.
13586 ///
13587 /// \param MagicValues Registered magic values.
13588 ///
13589 /// \param FoundWrongKind Set to true if a type tag was found, but of a wrong
13590 /// kind.
13591 ///
13592 /// \param TypeInfo Information about the corresponding C type.
13593 ///
13594 /// \returns true if the corresponding C type was found.
13595 static bool GetMatchingCType(
13596 const IdentifierInfo *ArgumentKind,
13597 const Expr *TypeExpr, const ASTContext &Ctx,
13598 const llvm::DenseMap<Sema::TypeTagMagicValue,
13599 Sema::TypeTagData> *MagicValues,
13600 bool &FoundWrongKind,
13601 Sema::TypeTagData &TypeInfo) {
13602 FoundWrongKind = false;
13603
13604 // Variable declaration that has type_tag_for_datatype attribute.
13605 const ValueDecl *VD = nullptr;
13606
13607 uint64_t MagicValue;
13608
13609 if (!FindTypeTagExpr(TypeExpr, Ctx, &VD, &MagicValue))
13610 return false;
13611
13612 if (VD) {
13613 if (TypeTagForDatatypeAttr *I = VD->getAttr<TypeTagForDatatypeAttr>()) {
13614 if (I->getArgumentKind() != ArgumentKind) {
13615 FoundWrongKind = true;
13616 return false;
13617 }
13618 TypeInfo.Type = I->getMatchingCType();
13619 TypeInfo.LayoutCompatible = I->getLayoutCompatible();
13620 TypeInfo.MustBeNull = I->getMustBeNull();
13621 return true;
13622 }
13623 return false;
13624 }
13625
13626 if (!MagicValues)
13627 return false;
13628
13629 llvm::DenseMap<Sema::TypeTagMagicValue,
13630 Sema::TypeTagData>::const_iterator I =
13631 MagicValues->find(std::make_pair(ArgumentKind, MagicValue));
13632 if (I == MagicValues->end())
13633 return false;
13634
13635 TypeInfo = I->second;
13636 return true;
13637 }
13638
13639 void Sema::RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind,
13640 uint64_t MagicValue, QualType Type,
13641 bool LayoutCompatible,
13642 bool MustBeNull) {
13643 if (!TypeTagForDatatypeMagicValues)
13644 TypeTagForDatatypeMagicValues.reset(
13645 new llvm::DenseMap<TypeTagMagicValue, TypeTagData>);
13646
13647 TypeTagMagicValue Magic(ArgumentKind, MagicValue);
13648 (*TypeTagForDatatypeMagicValues)[Magic] =
13649 TypeTagData(Type, LayoutCompatible, MustBeNull);
13650 }
13651
13652 static bool IsSameCharType(QualType T1, QualType T2) {
13653 const BuiltinType *BT1 = T1->getAs<BuiltinType>();
13654 if (!BT1)
13655 return false;
13656
13657 const BuiltinType *BT2 = T2->getAs<BuiltinType>();
13658 if (!BT2)
13659 return false;
13660
13661 BuiltinType::Kind T1Kind = BT1->getKind();
13662 BuiltinType::Kind T2Kind = BT2->getKind();
13663
13664 return (T1Kind == BuiltinType::SChar && T2Kind == BuiltinType::Char_S) ||
13665 (T1Kind == BuiltinType::UChar && T2Kind == BuiltinType::Char_U) ||
13666 (T1Kind == BuiltinType::Char_U && T2Kind == BuiltinType::UChar) ||
13667 (T1Kind == BuiltinType::Char_S && T2Kind == BuiltinType::SChar);
13668 }
13669
13670 void Sema::CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
13671 const ArrayRef<const Expr *> ExprArgs,
13672 SourceLocation CallSiteLoc) {
13673 const IdentifierInfo *ArgumentKind = Attr->getArgumentKind();
13674 bool IsPointerAttr = Attr->getIsPointer();
13675
13676 // Retrieve the argument representing the 'type_tag'.
13677 unsigned TypeTagIdxAST = Attr->getTypeTagIdx().getASTIndex();
13678 if (TypeTagIdxAST >= ExprArgs.size()) {
13679 Diag(CallSiteLoc, diag::err_tag_index_out_of_range)
13680 << 0 << Attr->getTypeTagIdx().getSourceIndex();
13681 return;
13682 }
13683 const Expr *TypeTagExpr = ExprArgs[TypeTagIdxAST];
13684 bool FoundWrongKind;
13685 TypeTagData TypeInfo;
13686 if (!GetMatchingCType(ArgumentKind, TypeTagExpr, Context,
13687 TypeTagForDatatypeMagicValues.get(),
13688 FoundWrongKind, TypeInfo)) {
13689 if (FoundWrongKind)
13690 Diag(TypeTagExpr->getExprLoc(),
13691 diag::warn_type_tag_for_datatype_wrong_kind)
13692 << TypeTagExpr->getSourceRange();
13693 return;
13694 }
13695
13696 // Retrieve the argument representing the 'arg_idx'.
13697 unsigned ArgumentIdxAST = Attr->getArgumentIdx().getASTIndex();
13698 if (ArgumentIdxAST >= ExprArgs.size()) {
13699 Diag(CallSiteLoc, diag::err_tag_index_out_of_range)
13700 << 1 << Attr->getArgumentIdx().getSourceIndex();
13701 return;
13702 }
13703 const Expr *ArgumentExpr = ExprArgs[ArgumentIdxAST];
13704 if (IsPointerAttr) {
13705 // Skip implicit cast of pointer to `void *' (as a function argument).
13706 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgumentExpr))
13707 if (ICE->getType()->isVoidPointerType() &&
13708 ICE->getCastKind() == CK_BitCast)
13709 ArgumentExpr = ICE->getSubExpr();
13710 }
13711 QualType ArgumentType = ArgumentExpr->getType();
13712
13713 // Passing a `void*' pointer shouldn't trigger a warning.
13714 if (IsPointerAttr && ArgumentType->isVoidPointerType())
13715 return;
13716
13717 if (TypeInfo.MustBeNull) {
13718 // Type tag with matching void type requires a null pointer.
13719 if (!ArgumentExpr->isNullPointerConstant(Context,
13720 Expr::NPC_ValueDependentIsNotNull)) {
13721 Diag(ArgumentExpr->getExprLoc(),
13722 diag::warn_type_safety_null_pointer_required)
13723 << ArgumentKind->getName()
13724 << ArgumentExpr->getSourceRange()
13725 << TypeTagExpr->getSourceRange();
13726 }
13727 return;
13728 }
13729
13730 QualType RequiredType = TypeInfo.Type;
13731 if (IsPointerAttr)
13732 RequiredType = Context.getPointerType(RequiredType);
13733
13734 bool mismatch = false;
13735 if (!TypeInfo.LayoutCompatible) {
13736 mismatch = !Context.hasSameType(ArgumentType, RequiredType);
13737
13738 // C++11 [basic.fundamental] p1:
13739 // Plain char, signed char, and unsigned char are three distinct types.
13740 //
13741 // But we treat plain `char' as equivalent to `signed char' or `unsigned
13742 // char' depending on the current char signedness mode.
13743 if (mismatch)
13744 if ((IsPointerAttr && IsSameCharType(ArgumentType->getPointeeType(),
13745 RequiredType->getPointeeType())) ||
13746 (!IsPointerAttr && IsSameCharType(ArgumentType, RequiredType)))
13747 mismatch = false;
13748 } else
13749 if (IsPointerAttr)
13750 mismatch = !isLayoutCompatible(Context,
13751 ArgumentType->getPointeeType(),
13752 RequiredType->getPointeeType());
13753 else
13754 mismatch = !isLayoutCompatible(Context, ArgumentType, RequiredType);
13755
13756 if (mismatch)
13757 Diag(ArgumentExpr->getExprLoc(), diag::warn_type_safety_type_mismatch)
13758 << ArgumentType << ArgumentKind
13759 << TypeInfo.LayoutCompatible << RequiredType
13760 << ArgumentExpr->getSourceRange()
13761 << TypeTagExpr->getSourceRange();
13762 }
13763
13764 void Sema::AddPotentialMisalignedMembers(Expr *E, RecordDecl *RD, ValueDecl *MD,
13765 CharUnits Alignment) {
13766 MisalignedMembers.emplace_back(E, RD, MD, Alignment);
13767 }
13768
13769 void Sema::DiagnoseMisalignedMembers() {
13770 for (MisalignedMember &m : MisalignedMembers) {
13771 const NamedDecl *ND = m.RD;
13772 if (ND->getName().empty()) {
13773 if (const TypedefNameDecl *TD = m.RD->getTypedefNameForAnonDecl())
13774 ND = TD;
13775 }
13776 Diag(m.E->getBeginLoc(), diag::warn_taking_address_of_packed_member)
13777 << m.MD << ND << m.E->getSourceRange();
13778 }
13779 MisalignedMembers.clear();
13780 }
13781
13782 void Sema::DiscardMisalignedMemberAddress(const Type *T, Expr *E) {
13783 E = E->IgnoreParens();
13784 if (!T->isPointerType() && !T->isIntegerType())
13785 return;
13786 if (isa<UnaryOperator>(E) &&
13787 cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf) {
13788 auto *Op = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens();
13789 if (isa<MemberExpr>(Op)) {
13790 auto MA = std::find(MisalignedMembers.begin(), MisalignedMembers.end(),
13791 MisalignedMember(Op));
13792 if (MA != MisalignedMembers.end() &&
13793 (T->isIntegerType() ||
13794 (T->isPointerType() && (T->getPointeeType()->isIncompleteType() ||
13795 Context.getTypeAlignInChars(
13796 T->getPointeeType()) <= MA->Alignment))))
13797 MisalignedMembers.erase(MA);
13798 }
13799 }
13800 }
13801
13802 void Sema::RefersToMemberWithReducedAlignment(
13803 Expr *E,
13804 llvm::function_ref<void(Expr *, RecordDecl *, FieldDecl *, CharUnits)>
13805 Action) {
13806 const auto *ME = dyn_cast<MemberExpr>(E);
13807 if (!ME)
13808 return;
13809
13810 // No need to check expressions with an __unaligned-qualified type.
13811 if (E->getType().getQualifiers().hasUnaligned())
13812 return;
13813
13814 // For a chain of MemberExpr like "a.b.c.d" this list
13815 // will keep FieldDecl's like [d, c, b].
13816 SmallVector<FieldDecl *, 4> ReverseMemberChain;
13817 const MemberExpr *TopME = nullptr;
13818 bool AnyIsPacked = false;
13819 do {
13820 QualType BaseType = ME->getBase()->getType();
13821 if (ME->isArrow())
13822 BaseType = BaseType->getPointeeType();
13823 RecordDecl *RD = BaseType->getAs<RecordType>()->getDecl();
13824 if (RD->isInvalidDecl())
13825 return;
13826
13827 ValueDecl *MD = ME->getMemberDecl();
13828 auto *FD = dyn_cast<FieldDecl>(MD);
13829 // We do not care about non-data members.
13830 if (!FD || FD->isInvalidDecl())
13831 return;
13832
13833 AnyIsPacked =
13834 AnyIsPacked || (RD->hasAttr<PackedAttr>() || MD->hasAttr<PackedAttr>());
13835 ReverseMemberChain.push_back(FD);
13836
13837 TopME = ME;
13838 ME = dyn_cast<MemberExpr>(ME->getBase()->IgnoreParens());
13839 } while (ME);
13840 assert(TopME && "We did not compute a topmost MemberExpr!");
13841
13842 // Not the scope of this diagnostic.
13843 if (!AnyIsPacked)
13844 return;
13845
13846 const Expr *TopBase = TopME->getBase()->IgnoreParenImpCasts();
13847 const auto *DRE = dyn_cast<DeclRefExpr>(TopBase);
13848 // TODO: The innermost base of the member expression may be too complicated.
13849 // For now, just disregard these cases. This is left for future
13850 // improvement.
13851 if (!DRE && !isa<CXXThisExpr>(TopBase))
13852 return;
13853
13854 // Alignment expected by the whole expression.
13855 CharUnits ExpectedAlignment = Context.getTypeAlignInChars(E->getType());
13856
13857 // No need to do anything else with this case.
13858 if (ExpectedAlignment.isOne())
13859 return;
13860
13861 // Synthesize offset of the whole access.
13862 CharUnits Offset;
13863 for (auto I = ReverseMemberChain.rbegin(); I != ReverseMemberChain.rend();
13864 I++) {
13865 Offset += Context.toCharUnitsFromBits(Context.getFieldOffset(*I));
13866 }
13867
13868 // Compute the CompleteObjectAlignment as the alignment of the whole chain.
13869 CharUnits CompleteObjectAlignment = Context.getTypeAlignInChars(
13870 ReverseMemberChain.back()->getParent()->getTypeForDecl());
13871
13872 // The base expression of the innermost MemberExpr may give
13873 // stronger guarantees than the class containing the member.
13874 if (DRE && !TopME->isArrow()) {
13875 const ValueDecl *VD = DRE->getDecl();
13876 if (!VD->getType()->isReferenceType())
13877 CompleteObjectAlignment =
13878 std::max(CompleteObjectAlignment, Context.getDeclAlign(VD));
13879 }
13880
13881 // Check if the synthesized offset fulfills the alignment.
13882 if (Offset % ExpectedAlignment != 0 ||
13883 // It may fulfill the offset it but the effective alignment may still be
13884 // lower than the expected expression alignment.
13885 CompleteObjectAlignment < ExpectedAlignment) {
13886 // If this happens, we want to determine a sensible culprit of this.
13887 // Intuitively, watching the chain of member expressions from right to
13888 // left, we start with the required alignment (as required by the field
13889 // type) but some packed attribute in that chain has reduced the alignment.
13890 // It may happen that another packed structure increases it again. But if
13891 // we are here such increase has not been enough. So pointing the first
13892 // FieldDecl that either is packed or else its RecordDecl is,
13893 // seems reasonable.
13894 FieldDecl *FD = nullptr;
13895 CharUnits Alignment;
13896 for (FieldDecl *FDI : ReverseMemberChain) {
13897 if (FDI->hasAttr<PackedAttr>() ||
13898 FDI->getParent()->hasAttr<PackedAttr>()) {
13899 FD = FDI;
13900 Alignment = std::min(
13901 Context.getTypeAlignInChars(FD->getType()),
13902 Context.getTypeAlignInChars(FD->getParent()->getTypeForDecl()));
13903 break;
13904 }
13905 }
13906 assert(FD && "We did not find a packed FieldDecl!");
13907 Action(E, FD->getParent(), FD, Alignment);
13908 }
13909 }
13910
13911 void Sema::CheckAddressOfPackedMember(Expr *rhs) {
13912 using namespace std::placeholders;
13913
13914 RefersToMemberWithReducedAlignment(
13915 rhs, std::bind(&Sema::AddPotentialMisalignedMembers, std::ref(*this), _1,
13916 _2, _3, _4));
13917 }
clang::analyze_printf::PrintfSpecifier::getArgType
ArgType getArgType(ASTContext &Ctx, bool IsObjCLiteral) const
Returns the builtin type that a data argument paired with this format specifier should have...
Definition: PrintfFormatString.cpp:629
clang::ObjCPropertyRefExpr
ObjCPropertyRefExpr - A dot-syntax expression to access an ObjC property.
Definition: ExprObjC.h:577
clang::ObjCMessageExpr::SuperInstance
The receiver is the instance of the superclass object.
Definition: ExprObjC.h:1061
diagnoseArrayStarInParamType
static void diagnoseArrayStarInParamType(Sema &S, QualType PType, SourceLocation Loc)
Definition: SemaChecking.cpp:12160
clang::Sema::GetFormatStringType
static FormatStringType GetFormatStringType(const FormatAttr *Format)
Definition: SemaChecking.cpp:6608
clang::BuiltinType::isFloatingPoint
bool isFloatingPoint() const
Definition: Type.h:2443
ASTContext.h
Defines the clang::ASTContext interface.
clang::ASTContext::getAddrSpaceQualType
QualType getAddrSpaceQualType(QualType T, LangAS AddressSpace) const
Return the uniqued reference to the type for an address space qualified type with the specified type ...
Definition: ASTContext.cpp:2652
clang::BlockExpr::getBlockDecl
const BlockDecl * getBlockDecl() const
Definition: Expr.h:5191
clang::TargetInfo::getTypeWidth
unsigned getTypeWidth(IntType T) const
Return the width (in bits) of the specified integer type enum.
Definition: TargetInfo.cpp:214
clang::Sema::VariadicCallType
VariadicCallType
Definition: Sema.h:9462
clang::NeonTypeFlags::Poly128
Definition: TargetBuiltins.h:120
clang::DeclRefExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.cpp:465
clang::TargetInfo::getTargetOpts
TargetOptions & getTargetOpts() const
Retrieve the target options.
Definition: TargetInfo.h:152
clang::CallExpr::isCallToStdMove
bool isCallToStdMove() const
Definition: Expr.h:2645
shouldNotPrintDirectly
static std::pair< QualType, StringRef > shouldNotPrintDirectly(const ASTContext &Context, QualType IntendedTy, const Expr *E)
Definition: SemaChecking.cpp:7717
clang::analyze_format_string::OptionalFlag::isSet
bool isSet() const
Definition: FormatString.h:38
clang::TargetInfo::getInt64Type
IntType getInt64Type() const
Definition: TargetInfo.h:292
clang::Builtin::Context::getHeaderName
const char * getHeaderName(unsigned ID) const
If this is a library function that comes from a specific header, retrieve that header name...
Definition: Builtins.h:183
clang::analyze_printf::PrintfSpecifier::hasAlternativeForm
const OptionalFlag & hasAlternativeForm() const
Definition: FormatString.h:574
clang::CanQual::withConst
QualType withConst() const
Retrieves a version of this type with const applied.
Definition: CanonicalType.h:162
clang::ObjCStringFormatFamily
ObjCStringFormatFamily
Definition: IdentifierTable.h:660
clang::ASTContext::LongLongTy
CanQualType LongLongTy
Definition: ASTContext.h:1025
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
AnalyzeCompoundAssignment
static void AnalyzeCompoundAssignment(Sema &S, BinaryOperator *E)
Analyze the given compound assignment for the possible losing of floating-point precision.
Definition: SemaChecking.cpp:10606
clang::Sema::getStdNamespace
NamespaceDecl * getStdNamespace() const
Definition: SemaDeclCXX.cpp:9012
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const char * getSpelling() const
clang::BuiltinType::Kind
Kind
Definition: Type.h:2393
clang::CallExpr::getArgs
Expr ** getArgs()
Retrieve the call arguments.
Definition: Expr.h:2543
Diag
static DiagnosticBuilder Diag(DiagnosticsEngine *Diags, const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd, unsigned DiagID)
Produce a diagnostic highlighting some portion of a literal.
Definition: LiteralSupport.cpp:78
clang::ObjCMessageExpr::Instance
The receiver is an object instance.
Definition: ExprObjC.h:1055
clang::FunctionDecl::getMemoryFunctionKind
unsigned getMemoryFunctionKind() const
Identify a memory copying or setting function.
Definition: Decl.cpp:3641
clang::ConditionalOperator::getLHS
Expr * getLHS() const
Definition: Expr.h:3627
CheckTautologicalComparison
static bool CheckTautologicalComparison(Sema &S, BinaryOperator *E, Expr *Constant, Expr *Other, const llvm::APSInt &Value, bool RhsConstant)
Definition: SemaChecking.cpp:10105
clang::CallExpr::getRParenLoc
SourceLocation getRParenLoc() const
Definition: Expr.h:2635
clang::ObjCDictionaryLiteral::getKeyValueElement
ObjCDictionaryElement getKeyValueElement(unsigned Index) const
Definition: ExprObjC.h:344
BUILTIN_ROW
#define BUILTIN_ROW(x)
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:134
clang::ASTContext::OCLQueueTy
CanQualType OCLQueueTy
Definition: ASTContext.h:1054
clang::Selector
Smart pointer class that efficiently represents Objective-C method names.
Definition: IdentifierTable.h:673
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2537
clang::PipeType::getElementType
QualType getElementType() const
Definition: Type.h:6016
clang::EvaluatedExprVisitor
EvaluatedExprVisitor - This class visits &#39;Expr *&#39;s.
Definition: EvaluatedExprVisitor.h:112
clang::ASTContext::VoidPtrTy
CanQualType VoidPtrTy
Definition: ASTContext.h:1044
clang::PointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2550
CXXRecordMembersNamed
static llvm::SmallPtrSet< MemberKind *, 1 > CXXRecordMembersNamed(StringRef Name, Sema &S, QualType Ty)
Definition: SemaChecking.cpp:7407
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:638
clang::Type::isBlockPointerType
bool isBlockPointerType() const
Definition: Type.h:6304
clang::ArraySubscriptExpr::getBase
Expr * getBase()
Definition: Expr.h:2355
clang::StringLiteral::getKind
StringKind getKind() const
Definition: Expr.h:1681
clang::Type::isArrayType
bool isArrayType() const
Definition: Type.h:6345
clang::Type::isMemberPointerType
bool isMemberPointerType() const
Definition: Type.h:6327
clang::MemberExpr::getMemberDecl
ValueDecl * getMemberDecl() const
Retrieve the member declaration to which this expression refers.
Definition: Expr.h:2773
CheckForReference
static bool CheckForReference(Sema &SemaRef, const Expr *E, const PartialDiagnostic &PD)
Definition: SemaChecking.cpp:11327
SemaOpenCLBuiltinEnqueueKernel
static bool SemaOpenCLBuiltinEnqueueKernel(Sema &S, CallExpr *TheCall)
OpenCL C v2.0, s6.13.17 - Enqueue kernel function contains four different overload formats specified ...
Definition: SemaChecking.cpp:516
clang::analyze_scanf::ScanfSpecifier::getConversionSpecifier
const ScanfConversionSpecifier & getConversionSpecifier() const
Definition: FormatString.h:650
clang::CallExpr::getArg
Expr * getArg(unsigned Arg)
getArg - Return the specified argument.
Definition: Expr.h:2553
clang::BinaryOperator::getExprLoc
SourceLocation getExprLoc() const
Definition: Expr.h:3318
clang::analyze_printf::PrintfSpecifier::hasValidThousandsGroupingPrefix
bool hasValidThousandsGroupingPrefix() const
Definition: PrintfFormatString.cpp:1010
clang::ObjCMessageExpr::getSelector
Selector getSelector() const
Definition: ExprObjC.cpp:312
SemaOpenCLBuiltinNDRangeAndBlock
static bool SemaOpenCLBuiltinNDRangeAndBlock(Sema &S, CallExpr *TheCall)
Definition: SemaChecking.cpp:413
clang::Type::isUnsignedIntegerOrEnumerationType
bool isUnsignedIntegerOrEnumerationType() const
Determines whether this is an integer type that is unsigned or an enumeration types whose underlying ...
Definition: Type.cpp:1900
clang::CXXRecordDecl::getNumBases
unsigned getNumBases() const
Retrieves the number of base classes of this class.
Definition: DeclCXX.h:817
isLayoutCompatible
static bool isLayoutCompatible(ASTContext &C, QualType T1, QualType T2)
Check if two types are layout-compatible in C++11 sense.
Definition: SemaChecking.cpp:13475
TypeTraits.h
Defines enumerations for the type traits support.
clang::Sema::FormatStringType
FormatStringType
Definition: Sema.h:10555
clang::ObjCPropertyRefExpr::isSuperReceiver
bool isSuperReceiver() const
Definition: ExprObjC.h:739
clang::Sema::LookupOrdinaryName
Ordinary name lookup, which finds ordinary names (functions, variables, typedefs, etc...
Definition: Sema.h:3055
clang::diff::Update
Definition: ASTDiff.h:31
clang::InitListExpr::getInit
const Expr * getInit(unsigned Init) const
Definition: Expr.h:4233
NSAPI.h
clang::StringLiteral::containsNonAsciiOrNull
bool containsNonAsciiOrNull() const
Definition: Expr.h:1699
clang::ASTContext::getPointerDiffType
QualType getPointerDiffType() const
Return the unique type for "ptrdiff_t" (C99 7.17) defined in <stddef.h>.
Definition: ASTContext.cpp:5002
clang::Sema::LookupName
bool LookupName(LookupResult &R, Scope *S, bool AllowBuiltinCreation=false)
Perform unqualified name lookup starting from a given scope.
Definition: SemaLookup.cpp:1734
clang::Expr::EvaluateAsInt
bool EvaluateAsInt(EvalResult &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) const
EvaluateAsInt - Return true if this is a constant which we can fold and convert to an integer...
Definition: ExprConstant.cpp:10951
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::CallExpr::getNumArgs
unsigned getNumArgs() const
getNumArgs - Return the number of actual arguments to this call.
Definition: Expr.h:2540
GetNSMutableArrayArgumentIndex
static Optional< int > GetNSMutableArrayArgumentIndex(Sema &S, ObjCMessageExpr *Message)
Definition: SemaChecking.cpp:12811
clang::FieldDecl::getBitWidth
Expr * getBitWidth() const
Definition: Decl.h:2668
clang::analyze_printf::PrintfSpecifier::consumesDataArgument
bool consumesDataArgument() const
Definition: FormatString.h:558
clang::BuiltinType::getKind
Kind getKind() const
Definition: Type.h:2418
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3355
clang::StringLiteral::getLocationOfByte
SourceLocation getLocationOfByte(unsigned ByteNo, const SourceManager &SM, const LangOptions &Features, const TargetInfo &Target, unsigned *StartToken=nullptr, unsigned *StartTokenByteOffset=nullptr) const
getLocationOfByte - Return a source location that points to the specified byte of this string literal...
Definition: Expr.cpp:1118
EvaluatedExprVisitor.h
clang::Type::getPointeeType
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:505
clang::TargetInfo::getTriple
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:953
clang::ComparisonCategoryResult::Greater
clang::EnumConstantDecl
An instance of this object exists for each enum constant that is defined.
Definition: Decl.h:2786
clang::Type::isRealFloatingType
bool isRealFloatingType() const
Floating point categories.
Definition: Type.cpp:1937
Base
Type.h
C Language Family Type Representation.
SourceManager.h
Defines the SourceManager interface.
clang::ObjCMessageExpr::getReceiverInterface
ObjCInterfaceDecl * getReceiverInterface() const
Retrieve the Objective-C interface to which this message is being directed, if known.
Definition: ExprObjC.cpp:333
BuiltinInfo
static const Builtin::Info BuiltinInfo[]
Definition: Builtins.cpp:21
clang::QualType::addConst
void addConst()
Add the const type qualifier to this QualType.
Definition: Type.h:807
clang::Type::isRecordType
bool isRecordType() const
Definition: Type.h:6369
clang::StringLiteral::isAscii
bool isAscii() const
Definition: Expr.h:1685
AnalyzeAssignment
static void AnalyzeAssignment(Sema &S, BinaryOperator *E)
Analyze the given simple or compound assignment for warning-worthy operations.
Definition: SemaChecking.cpp:10458
clang::MemberExpr::getBase
Expr * getBase() const
Definition: Expr.h:2767
clang::ASTContext::GE_None
No error.
Definition: ASTContext.h:2004
clang::analyze_format_string::OptionalAmount::Constant
Definition: FormatString.h:313
SemaBuiltinLaunder
static ExprResult SemaBuiltinLaunder(Sema &S, CallExpr *TheCall)
Definition: SemaChecking.cpp:883
clang::InitializedEntity::InitializeParameter
static InitializedEntity InitializeParameter(ASTContext &Context, const ParmVarDecl *Parm)
Create the initialization entity for a parameter.
Definition: Initialization.h:249
clang::ASTContext::getQualifiedType
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1933
clang::TypeDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: Decl.h:2898
clang::Sema::Diag
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1308
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
clang::NullStmt::hasLeadingEmptyMacro
bool hasLeadingEmptyMacro() const
Definition: Stmt.h:1224
clang::FunctionProtoType::isVariadic
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4002
clang::CXXConstructExpr::arg_begin
arg_iterator arg_begin()
Definition: ExprCXX.h:1399
clang::Decl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:410
clang::PartialDiagnostic
Definition: PartialDiagnostic.h:35
clang::Expr::setType
void setType(QualType t)
Definition: Expr.h:129
clang::BinaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:3322
clang::Sema::TypeTagData
Definition: Sema.h:10648
referToTheSameDecl
static bool referToTheSameDecl(const Expr *E1, const Expr *E2)
Check if two expressions refer to the same declaration.
Definition: SemaChecking.cpp:9334
clang::ParenExpr
ParenExpr - This represents a parethesized expression, e.g.
Definition: Expr.h:1844
clang::SourceManager::getCharacterData
const char * getCharacterData(SourceLocation SL, bool *Invalid=nullptr) const
Return a pointer to the start of the specified location in the appropriate spelling MemoryBuffer...
Definition: SourceManager.cpp:1094
clang::AbstractConditionalOperator::getFalseExpr
Expr * getFalseExpr() const
Definition: Expr.h:3750
clang::Sema::VAK_MSVCUndefined
Definition: Sema.h:9480
clang::Sema::FST_Scanf
Definition: Sema.h:10556
clang::OMPArraySectionExpr::getLowerBound
Expr * getLowerBound()
Get lower bound of array section.
Definition: ExprOpenMP.h:91
clang::FieldDecl::getParent
const RecordDecl * getParent() const
Returns the parent of this field declaration, which is the struct in which this field is defined...
Definition: Decl.h:2763
clang::IntegerLiteral
Definition: Expr.h:1308
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
clang::APValue::isVector
bool isVector() const
Definition: APValue.h:239
log2
#define log2(__x)
Definition: tgmath.h:986
clang::ASTContext::LongTy
CanQualType LongTy
Definition: ASTContext.h:1025
clang::Type::isClkEventT
bool isClkEventT() const
Definition: Type.h:6458
clang::ASTContext::getNSUIntegerType
CanQualType getNSUIntegerType() const
Definition: ASTContext.h:1691
clang::Sema::FST_NSString
Definition: Sema.h:10558
clang::NSAPI::NSDictionaryMethodKind
NSDictionaryMethodKind
Enumerates the NSDictionary/NSMutableDictionary methods used to generate literals and to apply some c...
Definition: NSAPI.h:100
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2812
clang::NamespaceDecl
Represent a C++ namespace.
Definition: Decl.h:515
clang::Sema::getLocForEndOfToken
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:46
clang::CXXConstructExpr
Represents a call to a C++ constructor.
Definition: ExprCXX.h:1262
clang::TypedefTypeLoc
Wrapper for source info for typedefs.
Definition: TypeLoc.h:664
getAbsoluteValueKind
static AbsoluteValueKind getAbsoluteValueKind(QualType T)
Definition: SemaChecking.cpp:8420
clang::QualType::withConst
QualType withConst() const
Definition: Type.h:810
AnalyzeComparison
static void AnalyzeComparison(Sema &S, BinaryOperator *E)
Implements -Wsign-compare.
Definition: SemaChecking.cpp:10211
clang::ASTContext::getTargetInfo
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:690
DeclObjC.h
Specifier
const NestedNameSpecifier * Specifier
Definition: USRLocFinder.cpp:173
clang::TypeSourceInfo
A container of type source information.
Definition: Decl.h:87
checkOpenCLPipeArg
static bool checkOpenCLPipeArg(Sema &S, CallExpr *Call)
Returns true if pipe element type is different from the pointer.
Definition: SemaChecking.cpp:640
clang::NeonTypeFlags::Int64
Definition: TargetBuiltins.h:116
clang::MaterializeTemporaryExpr
Represents a prvalue temporary that is written into memory so that a reference can bind to it...
Definition: ExprCXX.h:4156
checkArgCount
static bool checkArgCount(Sema &S, CallExpr *call, unsigned desiredArgCount)
Checks that a call expression&#39;s argument count is the desired number.
Definition: SemaChecking.cpp:110
distance
float __ovld __cnfn distance(float p0, float p1)
Returns the distance between p0 and p1.
clang::Sema::TypeTagData::MustBeNull
unsigned MustBeNull
Definition: Sema.h:10661
clang::ASTContext::HalfTy
CanQualType HalfTy
Definition: ASTContext.h:1040
clang::ArrayType::getElementType
QualType getElementType() const
Definition: Type.h:2847
clang::Type::getAsUnionType
const RecordType * getAsUnionType() const
NOTE: getAs*ArrayType are methods on ASTContext.
Definition: Type.cpp:540
changeAbsFunction
static unsigned changeAbsFunction(unsigned AbsKind, AbsoluteValueKind ValueKind)
Definition: SemaChecking.cpp:8433
Value
Value
Definition: UninitializedValues.cpp:102
clang::analyze_printf::PrintfSpecifier::usesPositionalArg
bool usesPositionalArg() const
Definition: FormatString.h:581
clang::Type::isUnsignedIntegerType
bool isUnsignedIntegerType() const
Return true if this is an integer type that is unsigned, according to C99 6.2.5p6 [which returns true...
Definition: Type.cpp:1884
clang::NSAPI::NSOrderedSet_setObjectAtIndexedSubscript
Definition: NSAPI.h:129
clang::SourceManager::getImmediateMacroCallerLoc
SourceLocation getImmediateMacroCallerLoc(SourceLocation Loc) const
Gets the location of the immediate macro caller, one level up the stack toward the initial macro type...
Definition: SourceManager.h:1687
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:813
clang::Sema::PDiag
PartialDiagnostic PDiag(unsigned DiagID=0)
Build a partial diagnostic.
Definition: SemaInternal.h:25
clang::FunctionDecl::getReturnType
QualType getReturnType() const
Definition: Decl.h:2302
clang::Scope::ScopeFlags
ScopeFlags
ScopeFlags - These are bitfields that are or&#39;d together when creating a scope, which defines the sort...
Definition: Scope.h:45
clang::Sema::Diags
DiagnosticsEngine & Diags
Definition: Sema.h:326
clang::CompoundLiteralExpr
CompoundLiteralExpr - [C99 6.5.2.5].
Definition: Expr.h:2925
clang::FunctionProtoType::getNumParams
unsigned getNumParams() const
Definition: Type.h:3888
clang::Type::isEnumeralType
bool isEnumeralType() const
Definition: Type.h:6373
clang::TargetOptions
Options for controlling the target.
Definition: TargetOptions.h:27
Sema.h
clang::ast_matchers::expr
const internal::VariadicDynCastAllOfMatcher< Stmt, Expr > expr
Matches expressions.
Definition: ASTMatchersInternal.cpp:690
clang::ast_matchers::pointerType
const AstTypeMatcher< PointerType > pointerType
Matches pointer types, but does not match Objective-C object pointer types.
Definition: ASTMatchersInternal.cpp:822
clang::EnumDecl::isFixed
bool isFixed() const
Returns true if this is an Objective-C, C++11, or Microsoft-style enumeration with a fixed underlying...
Definition: Decl.h:3529
clang::APValue::getComplexFloatReal
APFloat & getComplexFloatReal()
Definition: APValue.h:284
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6748
clang::analyze_format_string::OptionalAmount::getStart
const char * getStart() const
Definition: FormatString.h:350
clang::FunctionProtoType::ExtProtoInfo
Extra information about a function prototype.
Definition: Type.h:3767
clang::analyze_printf::PrintfSpecifier::hasThousandsGrouping
const OptionalFlag & hasThousandsGrouping() const
Definition: FormatString.h:569
clang::LangAS
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:26
clang::Stmt::Profile
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, bool Canonical) const
Produce a unique representation of the given statement.
Definition: StmtProfile.cpp:2012
clang::ObjCMethodDecl
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
clang::analyze_scanf::ScanfConversionSpecifier
Definition: FormatString.h:612
clang::Expr::IgnoreImplicit
Expr * IgnoreImplicit() LLVM_READONLY
IgnoreImplicit - Skip past any implicit AST nodes which might surround this expression.
Definition: Expr.h:747
clang::Decl::isInvalidDecl
bool isInvalidDecl() const
Definition: DeclBase.h:542
clang::frontend::After
Like System, but searched after the system directories.
Definition: HeaderSearchOptions.h:60
clang::APValue::isAddrLabelDiff
bool isAddrLabelDiff() const
Definition: APValue.h:244
SemaInternal.h
OperationKinds.h
clang::MultiVersionKind::Target
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1550
clang::Sema::getOpenCLOptions
OpenCLOptions & getOpenCLOptions()
Definition: Sema.h:1232
ExprCXX.h
Defines the clang::Expr interface and subclasses for C++ expressions.
clang::Sema::NSDictionaryDecl
ObjCInterfaceDecl * NSDictionaryDecl
The declaration of the Objective-C NSDictionary class.
Definition: Sema.h:896
CheckMemorySizeofForComparison
static bool CheckMemorySizeofForComparison(Sema &S, const Expr *E, IdentifierInfo *FnName, SourceLocation FnLoc, SourceLocation RParenLoc)
Takes the expression passed to the size_t parameter of functions such as memcmp, strncat, etc and warns if it&#39;s a comparison.
Definition: SemaChecking.cpp:8774
CheckBuiltinTargetSupport
static bool CheckBuiltinTargetSupport(Sema &S, unsigned BuiltinID, CallExpr *TheCall, ArrayRef< llvm::Triple::ArchType > SupportedArchs)
Definition: SemaChecking.cpp:946
clang::frontend::FixIt
Parse and apply any fixits to the source.
Definition: FrontendOptions.h:77
clang::Type::isStandardLayoutType
bool isStandardLayoutType() const
Test if this type is a standard-layout type.
Definition: Type.cpp:2352
clang::Type::isVariableArrayType
bool isVariableArrayType() const
Definition: Type.h:6357
clang::Expr::getSourceBitField
FieldDecl * getSourceBitField()
If this expression refers to a bit-field, retrieve the declaration of that bit-field.
Definition: Expr.cpp:3595
checkUnsafeAssignObject
static bool checkUnsafeAssignObject(Sema &S, SourceLocation Loc, Qualifiers::ObjCLifetime LT, Expr *RHS, bool isProperty)
Definition: SemaChecking.cpp:13052
clang::ObjCPropertyRefExpr::getExplicitProperty
ObjCPropertyDecl * getExplicitProperty() const
Definition: ExprObjC.h:670
clang::PipeType
PipeType - OpenCL20.
Definition: Type.h:6002
requiresParensToAddCast
static bool requiresParensToAddCast(const Expr *E)
Definition: SemaChecking.cpp:7680
clang::analyze_scanf::ScanfSpecifier::getArgType
ArgType getArgType(ASTContext &Ctx) const
Definition: ScanfFormatString.cpp:226
clang::Sema::VAK_Valid
Definition: Sema.h:9477
checkOpenCLEnqueueVariadicArgs
static bool checkOpenCLEnqueueVariadicArgs(Sema &S, CallExpr *TheCall, Expr *BlockArg, unsigned NumNonVarArgs)
OpenCL v2.0, s6.13.17.1 - Check that sizes are provided for all &#39;local void*&#39; parameter of passed blo...
Definition: SemaChecking.cpp:468
clang::analyze_format_string::ArgType::MatchKind
MatchKind
Definition: FormatString.h:254
clang::NamedDecl::getIdentifier
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:270
clang::analyze_format_string::FormatSpecifier::getArgIndex
unsigned getArgIndex() const
Definition: FormatString.h:410
clang::TypeLoc
Base wrapper for a particular "section" of type source info.
Definition: TypeLoc.h:57
clang::Expr::IgnoreImpCasts
Expr * IgnoreImpCasts() LLVM_READONLY
IgnoreImpCasts - Skip past any implicit casts which might surround this expression.
Definition: Expr.h:3162
clang::AtomicExpr::AtomicOp
AtomicOp
Definition: Expr.h:5435
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3593
checkVAStartIsInVariadicFunction
static bool checkVAStartIsInVariadicFunction(Sema &S, Expr *Fn, ParmVarDecl **LastParam=nullptr)
Definition: SemaChecking.cpp:5342
clang::Sema::UsualUnaryConversions
ExprResult UsualUnaryConversions(Expr *E)
UsualUnaryConversions - Performs various conversions that are common to most operators (C99 6...
Definition: SemaExpr.cpp:683
clang::NamedDecl::getDeclName
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:298
clang::EnumDecl::getIntegerTypeSourceInfo
TypeSourceInfo * getIntegerTypeSourceInfo() const
Return the type source info for the underlying integer type, if no type source info exists...
Definition: Decl.h:3496
clang::EnumDecl::isComplete
bool isComplete() const
Returns true if this can be considered a complete type.
Definition: Decl.h:3534
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:58
clang::Sema::NSAPIObj
std::unique_ptr< NSAPI > NSAPIObj
Caches identifiers/selectors for NSFoundation APIs.
Definition: Sema.h:860
clang::ConditionalOperator::getFalseExpr
Expr * getFalseExpr() const
Definition: Expr.h:3625
clang::TemplateArgumentList::get
const TemplateArgument & get(unsigned Idx) const
Retrieve the template argument at a given index.
Definition: DeclTemplate.h:255
clang::CharSourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:266
clang::FunctionProtoType::isNothrow
bool isNothrow(bool ResultIfDependent=false) const
Determine whether this function type has a non-throwing exception specification.
Definition: Type.h:3997
clang::ShuffleVectorExpr
ShuffleVectorExpr - clang-specific builtin-in function __builtin_shufflevector.
Definition: Expr.h:3846
clang::IdentifierInfo::isStr
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
Definition: IdentifierTable.h:137
clang::BlockPointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2654
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:155
clang::Sema::inTemplateInstantiation
bool inTemplateInstantiation() const
Determine whether we are currently performing template instantiation.
Definition: Sema.h:7520
llvm::Optional< unsigned >
clang::FunctionProtoType::getParamTypes
ArrayRef< QualType > getParamTypes() const
Definition: Type.h:3895
AVK_Complex
Definition: SemaChecking.cpp:8417
clang::analyze_format_string::ArgType
Definition: FormatString.h:249
clang::NSAPI::ClassId_NSMutableArray
Definition: NSAPI.h:34
clang::UETT_PreferredAlignOf
Used for GCC&#39;s __alignof.
Definition: TypeTraits.h:107
clang::StringLiteral::isUTF8
bool isUTF8() const
Definition: Expr.h:1687
clang::Type::isCharType
bool isCharType() const
Definition: Type.cpp:1787
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3784
clang::NSAPI::NSOrderedSet_replaceObjectAtIndexWithObject
Definition: NSAPI.h:130
clang::Stmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.cpp:288
clang::NSAPI::NSOrderedSet_insertObjectAtIndex
Definition: NSAPI.h:127
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2579
clang::analyze_format_string::ParseScanfString
bool ParseScanfString(FormatStringHandler &H, const char *beg, const char *end, const LangOptions &LO, const TargetInfo &Target)
Definition: ScanfFormatString.cpp:537
clang::Type::isCanonicalUnqualified
bool isCanonicalUnqualified() const
Determines if this type would be canonical if it had no further qualification.
Definition: Type.h:1837
isValidOrderingForOp
static bool isValidOrderingForOp(int64_t Ordering, AtomicExpr::AtomicOp Op)
Definition: SemaChecking.cpp:4317
clang::Qualifiers::ObjCLifetime
ObjCLifetime
Definition: Type.h:156
classifyConstantValue
static int classifyConstantValue(Expr *Constant)
Definition: SemaChecking.cpp:10091
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6308
clang::CallExpr::setArg
void setArg(unsigned Arg, Expr *ArgExpr)
setArg - Set the specified argument.
Definition: Expr.h:2563
clang::UnresolvedSetIterator
The iterator over UnresolvedSets.
Definition: UnresolvedSet.h:32
clang::Decl::getSourceRange
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:406
clang::DeclRefExpr::Create
static DeclRefExpr * Create(const ASTContext &Context, NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, ValueDecl *D, bool RefersToEnclosingVariableOrCapture, SourceLocation NameLoc, QualType T, ExprValueKind VK, NamedDecl *FoundD=nullptr, const TemplateArgumentListInfo *TemplateArgs=nullptr)
Definition: Expr.cpp:406
ScopeInfo.h
clang::OpaqueValueExpr::getSourceExpr
Expr * getSourceExpr() const
The source expression of an opaque value expression is the expression which originally generated the ...
Definition: Expr.h:1003
clang::analyze_format_string::ConversionSpecifier
Definition: FormatString.h:121
clang::Type::isSpecificBuiltinType
bool isSpecificBuiltinType(unsigned K) const
Test for a particular builtin type.
Definition: Type.h:6511
clang::BlockDecl::getBody
Stmt * getBody() const override
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: Decl.h:3937
clang::CastExpr::getSubExpr
Expr * getSubExpr()
Definition: Expr.h:3050
clang::analyze_printf::PrintfSpecifier::hasValidLeftJustified
bool hasValidLeftJustified() const
Definition: PrintfFormatString.cpp:996
clang::AtomicExpr::getScopeModel
std::unique_ptr< AtomicScopeModel > getScopeModel() const
Get atomic scope model.
Definition: Expr.h:5555
clang::ASTContext::OCLReserveIDTy
CanQualType OCLReserveIDTy
Definition: ASTContext.h:1054
clang::DeclaratorDecl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Decl.h:739
isLayoutCompatibleUnion
static bool isLayoutCompatibleUnion(ASTContext &C, RecordDecl *RD1, RecordDecl *RD2)
Check if two standard-layout unions are layout-compatible.
Definition: SemaChecking.cpp:13437
clang::AbstractConditionalOperator::getQuestionLoc
SourceLocation getQuestionLoc() const
Definition: Expr.h:3571
clang::LangOptions
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
clang::ObjCArrayLiteral
ObjCArrayLiteral - used for objective-c array containers; as in: @["Hello", NSApp, [NSNumber numberWithInt:42]];.
Definition: ExprObjC.h:171
clang::StringLiteral::getCharByteWidth
unsigned getCharByteWidth() const
Definition: Expr.h:1679
clang::APValue::isFloat
bool isFloat() const
Definition: APValue.h:235
clang::ArraySubscriptExpr::getRHS
Expr * getRHS()
Definition: Expr.h:2351
clang::QualType::isAtLeastAsQualifiedAs
bool isAtLeastAsQualifiedAs(QualType Other) const
Determine whether this type is at least as qualified as the other given type, requiring exact equalit...
Definition: Type.h:6226
clang::Type::isIntegralOrEnumerationType
bool isIntegralOrEnumerationType() const
Determine whether this type is an integral or enumeration type.
Definition: Type.h:6644
clang::Sema::DiagnoseEmptyLoopBody
void DiagnoseEmptyLoopBody(const Stmt *S, const Stmt *PossibleBody)
Warn if a for/while loop statement S, which is followed by PossibleBody, has a suspicious null statem...
Definition: SemaChecking.cpp:13204
llvm::SmallVectorImpl
Definition: LLVM.h:37
clang::ASTContext::Idents
IdentifierTable & Idents
Definition: ASTContext.h:566
GetNSSetArgumentIndex
static Optional< int > GetNSSetArgumentIndex(Sema &S, ObjCMessageExpr *Message)
Definition: SemaChecking.cpp:12878
clang::analyze_format_string::ArgType::matchesType
MatchKind matchesType(ASTContext &C, QualType argTy) const
Definition: FormatString.cpp:322
clang::VK_RValue
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
clang::NSAPI::NSMutableDict_setObjectForKey
Definition: NSAPI.h:111
clang::FunctionDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2262
clang::Selector::isUnarySelector
bool isUnarySelector() const
Definition: IdentifierTable.h:750
clang::analyze_printf::PrintfSpecifier::hasValidPlusPrefix
bool hasValidPlusPrefix() const
Definition: PrintfFormatString.cpp:885
clang::InitListExpr
Describes an C or C++ initializer list.
Definition: Expr.h:4185
CharUnits.h
clang::Expr::EvaluateAsBooleanCondition
bool EvaluateAsBooleanCondition(bool &Result, const ASTContext &Ctx) const
EvaluateAsBooleanCondition - Return true if this is a constant which we can fold and convert to a boo...
Definition: ExprConstant.cpp:10944
checkOpenCLEnqueueLocalSizeArgs
static bool checkOpenCLEnqueueLocalSizeArgs(Sema &S, CallExpr *TheCall, unsigned Start, unsigned End)
Definition: SemaChecking.cpp:457
clang::BinaryOperatorKind
BinaryOperatorKind
Definition: OperationKinds.h:26
isArithmeticArgumentPromotion
static bool isArithmeticArgumentPromotion(Sema &S, const ImplicitCastExpr *ICE)
Return true if ICE is an implicit argument promotion of an arithmetic type.
Definition: SemaChecking.cpp:7776
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2657
clang::ForStmt
ForStmt - This represents a &#39;for (init;cond;inc)&#39; stmt.
Definition: Stmt.h:2237
clang::StringLiteral::getLength
unsigned getLength() const
Definition: Expr.h:1678
clang::BinaryOperator::isEqualityOp
static bool isEqualityOp(Opcode Opc)
Definition: Expr.h:3374
clang::LookupResult
Represents the results of name lookup.
Definition: Lookup.h:47
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:174
clang::Expr::EvaluateAsFloat
bool EvaluateAsFloat(llvm::APFloat &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) const
EvaluateAsFloat - Return true if this is a constant which we can fold and convert to a floating point...
Definition: ExprConstant.cpp:10957
clang::Sema::getCurMethodDecl
ObjCMethodDecl * getCurMethodDecl()
getCurMethodDecl - If inside of a method body, this returns a pointer to the method decl for the meth...
Definition: Sema.cpp:1208
APValue.h
clang::CharUnits
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
clang::Expr::EvalResult::Val
APValue Val
Val - This is the value the expression can be folded to.
Definition: Expr.h:573
clang::Sema::VAK_Undefined
Definition: Sema.h:9479
clang::QualType::isTriviallyCopyableType
bool isTriviallyCopyableType(const ASTContext &Context) const
Return true if this is a trivially copyable type (C++0x [basic.types]p9)
Definition: Type.cpp:2205
LLVM.h
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
clang::QualType::print
void print(raw_ostream &OS, const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
Definition: TypePrinter.cpp:1827
clang::Type::getAsArrayTypeUnsafe
const ArrayType * getAsArrayTypeUnsafe() const
A variant of getAs<> for array types which silently discards qualifiers from the outermost type...
Definition: Type.h:6797
clang::Sema::CheckFloatComparison
void CheckFloatComparison(SourceLocation Loc, Expr *LHS, Expr *RHS)
Check for comparisons of floating point operands using != and ==.
Definition: SemaChecking.cpp:9472
clang::analyze_printf::PrintfSpecifier::hasValidPrecision
bool hasValidPrecision() const
Definition: PrintfFormatString.cpp:1030
clang::analyze_format_string::OptionalFlag::getPosition
const char * getPosition() const
Definition: FormatString.h:46
clang::CharUnits::isOne
bool isOne() const
isOne - Test whether the quantity equals one.
Definition: CharUnits.h:119
clang::Expr::getValueKind
ExprValueKind getValueKind() const
getValueKind - The value kind that this expression produces.
Definition: Expr.h:405
clang::analyze_format_string::FormatSpecifier::hasValidLengthModifier
bool hasValidLengthModifier(const TargetInfo &Target) const
Definition: FormatString.cpp:711
isNonNullType
static bool isNonNullType(ASTContext &ctx, QualType type)
Determine whether the given type has a non-null nullability annotation.
Definition: SemaChecking.cpp:4034
clang::analyze_format_string::OptionalAmount::hasDataArgument
bool hasDataArgument() const
Definition: FormatString.h:338
clang::Sema::TypeTagData::LayoutCompatible
unsigned LayoutCompatible
If true, Type should be compared with other expression&#39;s types for layout-compatibility.
Definition: Sema.h:10660
clang::ObjCPropertyDecl::getPropertyAttributes
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:840
clang::Stmt::children
child_range children()
Definition: Stmt.cpp:237
clang::TypeOfExprType
Represents a typeof (or typeof) expression (a GCC extension).
Definition: Type.h:4176
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:654
clang::CopiedTypeVisitor
Definition: NonTrivialTypeVisitor.h:79
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3287
clang::EnumDecl::getNumPositiveBits
unsigned getNumPositiveBits() const
Returns the width in bits required to store all the non-negative enumerators of this enum...
Definition: Decl.h:3506
clang::LangAS::opencl_private
clang::CC_X86_64SysV
Definition: Specifiers.h:244
clang::APValue::isComplexFloat
bool isComplexFloat() const
Definition: APValue.h:237
clang::ASTContext::getExceptionObjectType
QualType getExceptionObjectType(QualType T) const
Definition: ASTContext.cpp:5478
Cmd
CompileCommand Cmd
Definition: InterpolatingCompilationDatabase.cpp:126
clang::SourceManager::getSpellingLineNumber
unsigned getSpellingLineNumber(SourceLocation Loc, bool *Invalid=nullptr) const
Definition: SourceManager.cpp:1342
ExprObjC.h
clang::APValue::isComplexInt
bool isComplexInt() const
Definition: APValue.h:236
clang::MemberExpr::isArrow
bool isArrow() const
Definition: Expr.h:2874
Diagnostic.h
Defines the Diagnostic-related interfaces.
clang::ASTContext::getDeclAlign
CharUnits getDeclAlign(const Decl *D, bool ForAlignof=false) const
Return a conservative estimate of the alignment of the specified decl D.
Definition: ASTContext.cpp:1556
clang::Expr::IgnoreParenCasts
Expr * IgnoreParenCasts() LLVM_READONLY
IgnoreParenCasts - Ignore parentheses and casts.
Definition: Expr.cpp:2595
clang::ObjCStringLiteral
ObjCStringLiteral, used for Objective-C string literals i.e.
Definition: ExprObjC.h:51
clang::NullabilityKind::NonNull
Values of this type can never be null.
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:41
clang::ComparisonCategoryResult::Less
clang::NeonTypeFlags::Poly8
Definition: TargetBuiltins.h:117
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6072
clang::StringLiteral::StringKind
StringKind
StringLiteral is followed by several trailing objects.
Definition: Expr.h:1588
clang::RecordDecl::field_begin
field_iterator field_begin() const
Definition: Decl.cpp:4145
clang::FieldDecl::getBitWidthValue
unsigned getBitWidthValue(const ASTContext &Ctx) const
Definition: Decl.cpp:3787
clang::NSAPI::NSSetMethodKind
NSSetMethodKind
Enumerates the NSMutableSet/NSOrderedSet methods used to apply some checks.
Definition: NSAPI.h:125
clang::APValue::isInt
bool isInt() const
Definition: APValue.h:234
GetExprType
static QualType GetExprType(const Expr *E)
Definition: SemaChecking.cpp:9659
clang::SourceManager::isMacroBodyExpansion
bool isMacroBodyExpansion(SourceLocation Loc) const
Tests whether the given source location represents the expansion of a macro body. ...
Definition: SourceManager.cpp:1009
clang::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:2998
clang::CXXRecordDecl::bases_begin
base_class_iterator bases_begin()
Definition: DeclCXX.h:830
clang::SourceManager::getSpellingLoc
SourceLocation getSpellingLoc(SourceLocation Loc) const
Given a SourceLocation object, return the spelling location referenced by the ID. ...
Definition: SourceManager.h:1165
clang::analyze_format_string::FormatSpecifier::usesPositionalArg
bool usesPositionalArg() const
Definition: FormatString.h:438
clang::Sema::getLangOpts
const LangOptions & getLangOpts() const
Definition: Sema.h:1231
clang::NeonTypeFlags::isUnsigned
bool isUnsigned() const
Definition: TargetBuiltins.h:139
clang::DeclRefExpr::getQualifierLoc
NestedNameSpecifierLoc getQualifierLoc() const
If the name was qualified, retrieves the nested-name-specifier that precedes the name, with source-location information.
Definition: Expr.h:1133
clang::Expr::isTypeDependent
bool isTypeDependent() const
isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.
Definition: Expr.h:167
clang::Type::isScalarType
bool isScalarType() const
Definition: Type.h:6629
clang::NeonTypeFlags::Float64
Definition: TargetBuiltins.h:123
clang::Sema::CheckSingleAssignmentConstraints
AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, ExprResult &RHS, bool Diagnose=true, bool DiagnoseCFAudited=false, bool ConvertRHS=true)
Check assignment constraints for an assignment of RHS to LHSType.
Definition: SemaExpr.cpp:8194
clang::OK_Ordinary
An ordinary object is located at an address in memory.
Definition: Specifiers.h:126
getContainedDynamicClass
static const CXXRecordDecl * getContainedDynamicClass(QualType T, bool &IsContained)
Determine whether the given type is or contains a dynamic class type (e.g., whether it has a vtable)...
Definition: SemaChecking.cpp:8804
clang::FloatingLiteral
Definition: Expr.h:1445
clang::NeonTypeFlags::Int16
Definition: TargetBuiltins.h:114
SemaOpenCLBuiltinKernelWorkGroupSize
static bool SemaOpenCLBuiltinKernelWorkGroupSize(Sema &S, CallExpr *TheCall)
OpenCL C v2.0, s6.13.17.6 - Check the argument to the get_kernel_work_group_size and get_kernel_prefe...
Definition: SemaChecking.cpp:440
llvm::ArrayRef
Definition: LLVM.h:32
clang::Sema::LookupMemberName
Member name lookup, which finds the names of class/struct/union members.
Definition: Sema.h:3063
clang::DeclaratorDecl::getTypeSpecStartLoc
SourceLocation getTypeSpecStartLoc() const
Definition: Decl.cpp:1765
clang::Expr::NPCK_GNUNull
Expression is a GNU-style __null constant.
Definition: Expr.h:704
diagnoseRetainCycle
static void diagnoseRetainCycle(Sema &S, Expr *capturer, RetainCycleOwner &owner)
Definition: SemaChecking.cpp:12778
AnalyzeImpConvsInComparison
static void AnalyzeImpConvsInComparison(Sema &S, BinaryOperator *E)
Analyze the operands of the given comparison.
Definition: SemaChecking.cpp:10203
llvm::SmallString
Definition: LLVM.h:35
clang::QualType::PrimitiveDefaultInitializeKind
PrimitiveDefaultInitializeKind
Definition: Type.h:1073
clang::CanQual::getTypePtr
const T * getTypePtr() const
Retrieve the underlying type pointer, which refers to a canonical type.
Definition: CanonicalType.h:84
clang::APValue::getComplexIntReal
APSInt & getComplexIntReal()
Definition: APValue.h:268
clang::ASTContext::UnsignedCharTy
CanQualType UnsignedCharTy
Definition: ASTContext.h:1026
clang::ArraySubscriptExpr::getIdx
Expr * getIdx()
Definition: Expr.h:2358
clang::Decl::getCanonicalDecl
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
clang::analyze_format_string::ArgType::getRepresentativeTypeName
std::string getRepresentativeTypeName(ASTContext &C) const
Definition: FormatString.cpp:534
SemaBuiltinMSVCAnnotation
static bool SemaBuiltinMSVCAnnotation(Sema &S, CallExpr *TheCall)
Definition: SemaChecking.cpp:156
clang::Stmt::ExprIterator
Iterator for iterating over Stmt * arrays that contain only Expr *.
Definition: Stmt.h:983
clang::analyze_printf::PrintfSpecifier::hasLeadingZeros
const OptionalFlag & hasLeadingZeros() const
Definition: FormatString.h:575
clang::Type::hasUnsignedIntegerRepresentation
bool hasUnsignedIntegerRepresentation() const
Determine whether this type has an unsigned integer representation of some sort, e.g., it is an unsigned integer type or a vector.
Definition: Type.cpp:1914
clang::Sema::getFixItZeroLiteralForType
std::string getFixItZeroLiteralForType(QualType T, SourceLocation Loc) const
Definition: SemaFixItUtils.cpp:220
clang::Qualifiers::OCL_ExplicitNone
This object can be modified without requiring retains or releases.
Definition: Type.h:162
clang::FunctionDecl::param_begin
param_iterator param_begin()
Definition: Decl.h:2274
clang::CallExpr::arg_end
arg_iterator arg_end()
Definition: Expr.h:2593
clang::APValue::getVectorElt
APValue & getVectorElt(unsigned I)
Definition: APValue.h:312
clang::Type::isIntegralOrUnscopedEnumerationType
bool isIntegralOrUnscopedEnumerationType() const
Determine whether this type is an integral or unscoped enumeration type.
Definition: Type.cpp:1772
Parent
NodeId Parent
Definition: ASTDiff.cpp:192
clang::Scope::getFlags
unsigned getFlags() const
getFlags - Return the flags for this scope.
Definition: Scope.h:218
AddressSpaces.h
Provides definitions for the various language-specific address spaces.
clang::Decl::getNextDeclInContext
Decl * getNextDeclInContext()
Definition: DeclBase.h:424
clang::OMPArraySectionExpr
OpenMP 4.0 [2.4, Array Sections].
Definition: ExprOpenMP.h:45
clang::analyze_printf::PrintfSpecifier::hasPlusPrefix
const OptionalFlag & hasPlusPrefix() const
Definition: FormatString.h:573
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:531
clang::ConditionalOperator
ConditionalOperator - The ?: ternary operator.
Definition: Expr.h:3582
llvm::str
return Out str()
clang::Sema
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:278
clang::StringLiteral::getString
StringRef getString() const
Definition: Expr.h:1649
clang::Type::isPromotableIntegerType
bool isPromotableIntegerType() const
More type predicates useful for type checking/promotion.
Definition: Type.cpp:2455
clang::analyze_format_string::FormatSpecifier::hasStandardLengthConversionCombination
bool hasStandardLengthConversionCombination() const
Definition: FormatString.cpp:931
CharInfo.h
clang::Type::getAsCXXRecordDecl
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1613
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3687
clang::CXXRecordDecl::isDynamicClass
bool isDynamicClass() const
Definition: DeclCXX.h:789
clang::NSAPI::NSMutableArr_addObject
Definition: NSAPI.h:86
clang::FunctionDecl::getOverloadedOperator
OverloadedOperatorKind getOverloadedOperator() const
getOverloadedOperator - Which C++ overloaded operator this function represents, if any...
Definition: Decl.cpp:3300
clang::CastKind
CastKind
CastKind - The kind of operation required for a conversion.
Definition: OperationKinds.h:21
clang::EnumDecl::getPromotionType
QualType getPromotionType() const
Return the integer type that enumerators should promote to.
Definition: Decl.h:3472
checkOpenCLPipePacketType
static bool checkOpenCLPipePacketType(Sema &S, CallExpr *Call, unsigned Idx)
Returns true if pipe element type is different from the pointer.
Definition: SemaChecking.cpp:690
AbsoluteValueKind
AbsoluteValueKind
Definition: SemaChecking.cpp:8414
clang::UnaryExprOrTypeTraitExpr
UnaryExprOrTypeTraitExpr - expression with either a type or (unevaluated) expression operand...
Definition: Expr.h:2222
clang::BinaryOperator::getOpcodeStr
static StringRef getOpcodeStr(Opcode Op)
getOpcodeStr - Turn an Opcode enum value into the punctuation char it corresponds to...
Definition: Expr.cpp:1888
clang::Builtin::Context::getName
const char * getName(unsigned ID) const
Return the identifier name for the specified builtin, e.g.
Definition: Builtins.h:86
clang::Type::getPointeeOrArrayElementType
const Type * getPointeeOrArrayElementType() const
If this is a pointer type, return the pointee type.
Definition: Type.h:6695
clang::CXXConstructExpr::arg_end
arg_iterator arg_end()
Definition: ExprCXX.h:1400
clang::DeclRefExpr::getLocation
SourceLocation getLocation() const
Definition: Expr.h:1122
clang::OpenCLOptions::isEnabled
bool isEnabled(llvm::StringRef Ext) const
Definition: OpenCLOptions.h:39
clang::CharUnits::getQuantity
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
clang::AbstractConditionalOperator::getCond
Expr * getCond() const
Definition: Expr.h:3738
clang::TypedefNameDecl::getTypeSourceInfo
TypeSourceInfo * getTypeSourceInfo() const
Definition: Decl.h:2966
clang::Expr::EvaluateKnownConstInt
llvm::APSInt EvaluateKnownConstInt(const ASTContext &Ctx, SmallVectorImpl< PartialDiagnosticAt > *Diag=nullptr) const
EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded integer.
Definition: ExprConstant.cpp:11046
clang::ASTContext::getPromotedIntegerType
QualType getPromotedIntegerType(QualType PromotableType) const
Return the type that PromotableType will promote to: C99 6.3.1.1p2, assuming that PromotableType is a...
Definition: ASTContext.cpp:5705
clang::Sema::getCurScope
Scope * getCurScope() const
Retrieve the parser&#39;s current scope.
Definition: Sema.h:10729
Offset
unsigned Offset
Definition: Format.cpp:1631
DiagnoseFloatingImpCast
static void DiagnoseFloatingImpCast(Sema &S, Expr *E, QualType T, SourceLocation CContext)
Diagnose an implicit cast from a floating point value to an integer value.
Definition: SemaChecking.cpp:10503
clang::Expr::HasSideEffects
bool HasSideEffects(const ASTContext &Ctx, bool IncludePossibleEffects=true) const
HasSideEffects - This routine returns true for all those expressions which have any effect other than...
Definition: Expr.cpp:3101
clang::TargetInfo
Exposes information about the current target.
Definition: TargetInfo.h:54
clang::ArrayType::Star
Definition: Type.h:2819
clang::NSAPI::NSArrayMethodKind
NSArrayMethodKind
Enumerates the NSArray/NSMutableArray methods used to generate literals and to apply some checks...
Definition: NSAPI.h:76
TargetCXXABI.h
Defines the TargetCXXABI class, which abstracts details of the C++ ABI that we&#39;re targeting...
clang::NSAPI::NSMutableArr_replaceObjectAtIndex
Definition: NSAPI.h:85
clang::ConditionalOperator::getCond
Expr * getCond() const
Definition: Expr.h:3616
clang::ParamIdx
A single parameter index whose accessors require each use to make explicit the parameter index encodi...
Definition: Attr.h:214
clang::ValueDecl::isWeak
bool isWeak() const
Determine whether this symbol is weakly-imported, or declared with the weak or weak-ref attr...
Definition: Decl.cpp:4394
clang::ASTContext::getVectorType
QualType getVectorType(QualType VectorType, unsigned NumElts, VectorType::VectorKind VecKind) const
Return the unique reference to a vector type of the specified element type and size.
Definition: ASTContext.cpp:3385
clang::BlockDecl
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3858
clang::ValueDecl
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:637
clang::Expr
This represents one expression.
Definition: Expr.h:106
LangOptions.h
Defines the clang::LangOptions interface.
clang::analyze_printf::PrintfSpecifier::isLeftJustified
const OptionalFlag & isLeftJustified() const
Definition: FormatString.h:572
clang::Expr::SE_AllowSideEffects
Allow any unmodeled side effect.
Definition: Expr.h:599
End
SourceLocation End
Definition: USRLocFinder.cpp:167
clang::CharSourceRange
Represents a character-granular source range.
Definition: SourceLocation.h:236
clang::ExprValueKind
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:107
clang::LangAS::opencl_local
clang::CallExpr::setCallee
void setCallee(Expr *F)
Definition: Expr.h:2516
compare
static bool compare(const PathDiagnostic &X, const PathDiagnostic &Y)
Definition: PathDiagnostic.cpp:420
clang::Expr::EvaluateForOverflow
void EvaluateForOverflow(const ASTContext &Ctx) const
Definition: ExprConstant.cpp:11076
CheckImplicitArgumentConversions
static void CheckImplicitArgumentConversions(Sema &S, CallExpr *TheCall, SourceLocation CC)
Definition: SemaChecking.cpp:10669
clang::TargetInfo::hasSjLjLowering
virtual bool hasSjLjLowering() const
Controls if __builtin_longjmp / __builtin_setjmp can be lowered to llvm.eh.sjlj.longjmp / llvm...
Definition: TargetInfo.h:1264
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6811
clang::Type::isObjCRetainableType
bool isObjCRetainableType() const
Definition: Type.cpp:3921
clang::NamedDecl::getObjCFStringFormattingFamily
ObjCStringFormatFamily getObjCFStringFormattingFamily() const
Definition: Decl.cpp:1049
checkOpenCLBlockArgs
static bool checkOpenCLBlockArgs(Sema &S, Expr *BlockArg)
OpenCL C v2.0, s6.13.17.2 - Checks that the block parameters are all local void*, which is a requirem...
Definition: SemaChecking.cpp:371
clang::BlockExpr
BlockExpr - Adaptor class for mixing a BlockDecl with expressions.
Definition: Expr.h:5177
clang::TypeLoc::getAs
T getAs() const
Convert to the specified TypeLoc type, returning a null TypeLoc if this TypeLoc is not of the desired...
Definition: TypeLoc.h:87
clang::CXXDestructorDecl
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2706
clang::ast_matchers::decl
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
Definition: ASTMatchersInternal.cpp:561
clang::CallExpr::getCallee
Expr * getCallee()
Definition: Expr.h:2514
clang::analyze_format_string::OptionalFlag::toString
const char * toString() const
Definition: FormatString.h:50
clang::InitListExpr::getNumInits
unsigned getNumInits() const
Definition: Expr.h:4215
DeclBase.h
Lookup.h
clang::FunctionDecl::getTemplateSpecializationArgs
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3475
clang::Scope::SEHExceptScope
This scope corresponds to an SEH except.
Definition: Scope.h:125
OperatorKinds.h
Defines an enumeration for C++ overloaded operators.
clang::Type::isNullPtrType
bool isNullPtrType() const
Definition: Type.h:6569
clang::analyze_printf::PrintfSpecifier::hasValidLeadingZeros
bool hasValidLeadingZeros() const
Definition: PrintfFormatString.cpp:938
clang::Sema::LK_String
Definition: Sema.h:2743
clang::RecordDecl::field_end
field_iterator field_end() const
Definition: Decl.h:3787
clang::ASTContext::getTypeAlignInChars
CharUnits getTypeAlignInChars(QualType T) const
Return the ABI-specified alignment of a (complete) type T, in characters.
Definition: ASTContext.cpp:2176
clang::Selector::getNameForSlot
StringRef getNameForSlot(unsigned argIndex) const
Retrieve the name at a given position in the selector.
Definition: IdentifierTable.cpp:436
clang::analyze_format_string::ConversionSpecifier::getLength
unsigned getLength() const
Definition: FormatString.h:223
clang::ObjCDictionaryLiteral
ObjCDictionaryLiteral - AST node to represent objective-c dictionary literals; as in:"name" : NSUserN...
Definition: ExprObjC.h:288
clang::Type::canDecayToPointerType
bool canDecayToPointerType() const
Determines whether this type can decay to a pointer type.
Definition: Type.h:6675
clang::Decl::getDeclContext
DeclContext * getDeclContext()
Definition: DeclBase.h:427
clang::ObjCPropertyDecl::OBJC_PR_weak
Definition: DeclObjC.h:744
clang::CXXRecordDecl::getDefinition
CXXRecordDecl * getDefinition() const
Definition: DeclCXX.h:769
clang::Type::isAnyComplexType
bool isAnyComplexType() const
Definition: Type.h:6377
clang::Expr::setObjectKind
void setObjectKind(ExprObjectKind Cat)
setObjectKind - Set the object kind produced by this expression.
Definition: Expr.h:425
Lexer.h
clang::ASTContext::ShortTy
CanQualType ShortTy
Definition: ASTContext.h:1025
Scope.h
clang::CallExpr::getDirectCallee
FunctionDecl * getDirectCallee()
If the callee is a FunctionDecl, return it. Otherwise return null.
Definition: Expr.h:2532
clang::analyze_format_string::FormatSpecifier::getFieldWidth
const OptionalAmount & getFieldWidth() const
Definition: FormatString.h:422
clang::QualType::removeLocalConst
void removeLocalConst()
Definition: Type.h:6166
clang::QualType::removeLocalVolatile
void removeLocalVolatile()
Definition: Type.h:6174
clang::Sema::RequireCompleteType
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7603
TypeLoc.h
Defines the clang::TypeLoc interface and its subclasses.
clang::BlockDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:3964
clang::NeonTypeFlags::Poly64
Definition: TargetBuiltins.h:119
clang::Type::isSignedIntegerType
bool isSignedIntegerType() const
Return true if this is an integer type that is signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], or an enum decl which has a signed representation.
Definition: Type.cpp:1844
IdentifierTable.h
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
clang::Expr::getType
QualType getType() const
Definition: Expr.h:128
clang::DeclContext::isFunctionOrMethod
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
clang::Sema::TypeTagData::Type
QualType Type
Definition: Sema.h:10656
clang::analyze_format_string::FormatStringHandler
Definition: FormatString.h:677
clang::SourceManager::getImmediateExpansionRange
CharSourceRange getImmediateExpansionRange(SourceLocation Loc) const
Return the start/end of the expansion information for an expansion location.
Definition: SourceManager.cpp:964
clang::StringLiteral::isWide
bool isWide() const
Definition: Expr.h:1686
clang::ObjCArrayLiteral::getElement
Expr * getElement(unsigned Index)
getElement - Return the Element at the specified index.
Definition: ExprObjC.h:213
CheckNonNullArguments
static void CheckNonNullArguments(Sema &S, const NamedDecl *FDecl, const FunctionProtoType *Proto, ArrayRef< const Expr *> Args, SourceLocation CallSiteLoc)
Definition: SemaChecking.cpp:4041
Stmt.h
clang::Expr::setValueKind
void setValueKind(ExprValueKind Cat)
setValueKind - Set the value kind produced by this expression.
Definition: Expr.h:422
clang::TargetInfo::validateCpuSupports
virtual bool validateCpuSupports(StringRef Name) const
Definition: TargetInfo.h:1101
clang::analyze_printf::PrintfConversionSpecifier
Definition: FormatString.h:462
SemaBuiltinPipePackets
static bool SemaBuiltinPipePackets(Sema &S, CallExpr *Call)
Definition: SemaChecking.cpp:820
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
clang::ObjCMessageExpr
An expression that sends a message to the given Objective-C object or class.
Definition: ExprObjC.h:904
clang::analyze_format_string::OptionalAmount
Definition: FormatString.h:311
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:170
clang::ArraySubscriptExpr::getRBracketLoc
SourceLocation getRBracketLoc() const
Definition: Expr.h:2366
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:208
clang::UnaryOperator
UnaryOperator - This represents the unary-expression&#39;s (except sizeof and alignof), the postinc/postdec operators from postfix-expression, and various extensions.
Definition: Expr.h:1896
CheckFormatString
static void CheckFormatString(Sema &S, const FormatStringLiteral *FExpr, const Expr *OrigFormatExpr, ArrayRef< const Expr *> Args, bool HasVAListArg, unsigned format_idx, unsigned firstDataArg, Sema::FormatStringType Type, bool inFunctionCall, Sema::VariadicCallType CallType, llvm::SmallBitVector &CheckedVarArgs, UncoveredArgHandler &UncoveredArg)
Definition: SemaChecking.cpp:8228
clang::ASTContext::getFunctionType
QualType getFunctionType(QualType ResultTy, ArrayRef< QualType > Args, const FunctionProtoType::ExtProtoInfo &EPI) const
Return a normal function type with a typed argument list.
Definition: ASTContext.h:1380
clang::VectorType
Represents a GCC generic vector type.
Definition: Type.h:3168
clang::ObjCMessageExpr::getReceiverKind
ReceiverKind getReceiverKind() const
Determine the kind of receiver that this message is being sent to.
Definition: ExprObjC.h:1188
getOpenCLArgAccess
static OpenCLAccessAttr * getOpenCLArgAccess(const Decl *D)
Returns OpenCL access qual.
Definition: SemaChecking.cpp:635
clang::ArrayType::getSizeModifier
ArraySizeModifier getSizeModifier() const
Definition: Type.h:2849
clang::Sema::VAK_ValidInCXX11
Definition: Sema.h:9478
clang::NeonTypeFlags::Float16
Definition: TargetBuiltins.h:121
clang::Selector::getNumArgs
unsigned getNumArgs() const
Definition: IdentifierTable.cpp:414
clang::Type::getBaseElementTypeUnsafe
const Type * getBaseElementTypeUnsafe() const
Get the base element type of this type, potentially discarding type qualifiers.
Definition: Type.h:6688
clang::BlockDecl::capturesVariable
bool capturesVariable(const VarDecl *var) const
Definition: Decl.cpp:4289
clang::DeclRefExpr::getDecl
ValueDecl * getDecl()
Definition: Expr.h:1114
clang::AbstractConditionalOperator::getTrueExpr
Expr * getTrueExpr() const
Definition: Expr.h:3744
clang::APValue::getComplexIntImag
APSInt & getComplexIntImag()
Definition: APValue.h:276
clang::ASTContext::getTypeDeclType
QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl *PrevDecl=nullptr) const
Return the unique reference to the type for the specified type declaration.
Definition: ASTContext.h:1396
clang::SourceManager::getPresumedLineNumber
unsigned getPresumedLineNumber(SourceLocation Loc, bool *Invalid=nullptr) const
Definition: SourceManager.cpp:1354
DiagnoseImpCast
static void DiagnoseImpCast(Sema &S, Expr *E, QualType SourceType, QualType T, SourceLocation CContext, unsigned diag, bool pruneControlFlow=false)
Diagnose an implicit cast; purely a helper for CheckImplicitConversion.
Definition: SemaChecking.cpp:10481
clang::CStyleCastExpr
CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style cast in C++ (C++ [expr.cast]), which uses the syntax (Type)expr.
Definition: Expr.h:3224
clang::QualType::withoutLocalFastQualifiers
QualType withoutLocalFastQualifiers() const
Definition: Type.h:866
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:703
clang::ObjCMethodDecl::getSelfDecl
ImplicitParamDecl * getSelfDecl() const
Definition: DeclObjC.h:414
IsTailPaddedMemberArray
static bool IsTailPaddedMemberArray(Sema &S, const llvm::APInt &Size, const NamedDecl *ND)
Check whether this array fits the idiom of a size-one tail padded array member of a struct...
Definition: SemaChecking.cpp:12339
clang::analyze_format_string::FormatSpecifier::getLengthModifier
const LengthModifier & getLengthModifier() const
Definition: FormatString.h:418
clang::ArraySubscriptExpr::getLHS
Expr * getLHS()
An array access can be written A[4] or 4[A] (both are equivalent).
Definition: Expr.h:2347
clang::ObjCPropertyDecl::getType
QualType getType() const
Definition: DeclObjC.h:829
SM
const SourceManager & SM
Definition: Format.cpp:1490
getIdentifier
static StringRef getIdentifier(const Token &Tok)
Definition: ParsePragma.cpp:1160
getNeonEltType
static QualType getNeonEltType(NeonTypeFlags Flags, ASTContext &Context, bool IsPolyUnsigned, bool IsInt64Long)
getNeonEltType - Return the QualType corresponding to the elements of the vector type specified by th...
Definition: SemaChecking.cpp:1520
clang::ASTContext::getNSIntegerType
CanQualType getNSIntegerType() const
Definition: ASTContext.h:1700
clang::CallingConv
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:236
getStrlenExprArg
static const Expr * getStrlenExprArg(const Expr *E)
Definition: SemaChecking.cpp:9341
SemaBuiltinCpuSupports
static bool SemaBuiltinCpuSupports(Sema &S, CallExpr *TheCall)
SemaBuiltinCpuSupports - Handle __builtin_cpu_supports(char *).
Definition: SemaChecking.cpp:3211
clang::ObjCMessageExpr::getArg
Expr * getArg(unsigned Arg)
getArg - Return the specified argument.
Definition: ExprObjC.h:1342
clang::ASTContext::SignedCharTy
CanQualType SignedCharTy
Definition: ASTContext.h:1025
isConstantSizeArrayWithMoreThanOneElement
static bool isConstantSizeArrayWithMoreThanOneElement(QualType Ty, ASTContext &Context)
Definition: SemaChecking.cpp:9251
clang::Stmt::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:301
FindTypeTagExpr
static bool FindTypeTagExpr(const Expr *TypeExpr, const ASTContext &Ctx, const ValueDecl **VD, uint64_t *MagicValue)
Given a type tag expression find the type tag itself.
Definition: SemaChecking.cpp:13519
clang::CharSourceRange::getCharRange
static CharSourceRange getCharRange(SourceRange R)
Definition: SourceLocation.h:248
clang::QualType::isConstQualified
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6131
clang::Type::isVoidPointerType
bool isVoidPointerType() const
Definition: Type.cpp:469
clang::TargetOptions::CPU
std::string CPU
If given, the name of the target CPU to generate code for.
Definition: TargetOptions.h:37
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4380
clang::Sema::TypeTagMagicValue
std::pair< const IdentifierInfo *, uint64_t > TypeTagMagicValue
A pair of ArgumentKind identifier and magic value.
Definition: Sema.h:10666
checkVAStartABI
static bool checkVAStartABI(Sema &S, unsigned BuiltinID, Expr *Fn)
Check that the user is calling the appropriate va_start builtin for the target and calling convention...
Definition: SemaChecking.cpp:5308
SemaBuiltinCommitRWPipe
static bool SemaBuiltinCommitRWPipe(Sema &S, CallExpr *Call)
Definition: SemaChecking.cpp:797
clang::NeonTypeFlags::getEltType
EltType getEltType() const
Definition: TargetBuiltins.h:134
OpenCLOptions.h
Defines the clang::OpenCLOptions class.
AVK_Floating
Definition: SemaChecking.cpp:8416
IsStdFunction
static bool IsStdFunction(const FunctionDecl *FDecl, const char(&Str)[StrLen])
Definition: SemaChecking.cpp:8613
clang::Expr::EvaluateAsRValue
bool EvaluateAsRValue(EvalResult &Result, const ASTContext &Ctx, bool InConstantContext=false) const
EvaluateAsRValue - Return true if this is a constant which we can fold to an rvalue using any crazy t...
Definition: ExprConstant.cpp:10937
clang::analyze_format_string::ParseFormatStringHasSArg
bool ParseFormatStringHasSArg(const char *beg, const char *end, const LangOptions &LO, const TargetInfo &Target)
Definition: PrintfFormatString.cpp:434
clang::Qualifiers::OCL_None
There is no lifetime qualification on this type.
Definition: Type.h:158
clang::LangAS::opencl_generic
clang::OpaqueValueExpr
OpaqueValueExpr - An expression referring to an opaque object of a fixed type and value class...
Definition: Expr.h:945
clang::SFF_CFString
Definition: IdentifierTable.h:663
TargetBuiltins.h
Enumerates target-specific builtins in their own namespaces within namespace clang.
clang::ConvertVectorExpr
ConvertVectorExpr - Clang builtin function __builtin_convertvector This AST node provides support for...
Definition: Expr.h:3914
clang::ObjCMessageExpr::getNumArgs
unsigned getNumArgs() const
Return the number of actual arguments in this message, not counting the receiver. ...
Definition: ExprObjC.h:1329
clang::ASTContext::BuiltinFnTy
CanQualType BuiltinFnTy
Definition: ASTContext.h:1046
clang::analyze_format_string::FormatSpecifier::hasStandardLengthModifier
bool hasStandardLengthModifier() const
Definition: FormatString.cpp:863
clang::Qualifiers::OCL_Strong
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:169
Kind
Kind
Definition: ChrootChecker.cpp:29
Attr.h
clang::QualType::getCanonicalType
QualType getCanonicalType() const
Definition: Type.h:6111
clang::VectorType::GenericVector
not a target-specific vector type
Definition: Type.h:3172
clang::ActionResult
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
clang::PseudoObjectExpr
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5299
clang::ObjCPropertyRefExpr::isImplicitProperty
bool isImplicitProperty() const
Definition: ExprObjC.h:667
clang::Expr::isInstantiationDependent
bool isInstantiationDependent() const
Whether this expression is instantiation-dependent, meaning that it depends in some way on a template...
Definition: Expr.h:191
clang::Sema::DiagnoseMisalignedMembers
void DiagnoseMisalignedMembers()
Diagnoses the current set of gathered accesses.
Definition: SemaChecking.cpp:13769
isLayoutCompatibleStruct
static bool isLayoutCompatibleStruct(ASTContext &C, RecordDecl *RD1, RecordDecl *RD2)
Check if two standard-layout structs are layout-compatible.
Definition: SemaChecking.cpp:13393
clang::Sema::RefersToMemberWithReducedAlignment
void RefersToMemberWithReducedAlignment(Expr *E, llvm::function_ref< void(Expr *, RecordDecl *, FieldDecl *, CharUnits)> Action)
This function calls Action when it determines that E designates a misaligned member due to the packed...
Definition: SemaChecking.cpp:13802
clang::Sema::getASTContext
ASTContext & getASTContext() const
Definition: Sema.h:1238
considerVariable
static bool considerVariable(VarDecl *var, Expr *ref, RetainCycleOwner &owner)
Consider whether capturing the given variable can possibly lead to a retain cycle.
Definition: SemaChecking.cpp:12594
checkObjCCollectionLiteralElement
static void checkObjCCollectionLiteralElement(Sema &S, QualType TargetElementType, Expr *Element, unsigned ElementKind)
Check a single element within a collection literal against the target element type.
Definition: SemaChecking.cpp:10746
clang::LangAS::Default
clang::Expr::isNullPointerConstant
NullPointerConstantKind isNullPointerConstant(ASTContext &Ctx, NullPointerConstantValueDependence NPC) const
isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to a Null pointer constant...
Definition: Expr.cpp:3438
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:88
clang::StringLiteral::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Expr.h:1742
clang::IdentifierTable::get
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
Definition: IdentifierTable.h:519
CheckConditionalOperator
static void CheckConditionalOperator(Sema &S, ConditionalOperator *E, SourceLocation CC, QualType T)
Definition: SemaChecking.cpp:11164
clang::Sema::CheckParmsForFunctionDef
bool CheckParmsForFunctionDef(ArrayRef< ParmVarDecl *> Parameters, bool CheckParameterNames)
Helpers for dealing with blocks and functions.
Definition: SemaChecking.cpp:12194
getSizeOfExprArg
static const Expr * getSizeOfExprArg(const Expr *E)
If E is a sizeof expression, returns its argument expression, otherwise returns NULL.
Definition: SemaChecking.cpp:8842
clang::EnumType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:4396
clang::BinaryOperator::getOperatorLoc
SourceLocation getOperatorLoc() const
Definition: Expr.h:3319
doesExprLikelyComputeSize
static bool doesExprLikelyComputeSize(const Expr *SizeofExpr)
Detect if SizeofExpr is likely to calculate the sizeof an object.
Definition: SemaChecking.cpp:8949
clang::QualType::getAddressSpace
LangAS getAddressSpace() const
Return the address space of this type.
Definition: Type.h:6188
clang::Expr::NPCK_NotNull
Expression is not a Null pointer constant.
Definition: Expr.h:688
clang::Sema::isValidVarArgType
VarArgKind isValidVarArgType(const QualType &Ty)
Determine the degree of POD-ness for an expression.
Definition: SemaExpr.cpp:784
clang::UnaryOperator::getSubExpr
Expr * getSubExpr() const
Definition: Expr.h:1926
clang::Type::isVariablyModifiedType
bool isVariablyModifiedType() const
Whether this type is a variably-modified type (C99 6.7.5).
Definition: Type.h:2095
clang::Sema::checkRetainCycles
void checkRetainCycles(ObjCMessageExpr *msg)
checkRetainCycles - Check whether an Objective-C message send might create an obvious retain cycle...
Definition: SemaChecking.cpp:12978
clang::analyze_format_string::ConversionSpecifier::getStart
const char * getStart() const
Definition: FormatString.h:199
clang::analyze_printf::PrintfSpecifier::hasValidSpacePrefix
bool hasValidSpacePrefix() const
Definition: PrintfFormatString.cpp:970
ignoreLiteralAdditions
static const Expr * ignoreLiteralAdditions(const Expr *Ex, ASTContext &Ctx)
Definition: SemaChecking.cpp:9229
clang::CastExpr::getCastKind
CastKind getCastKind() const
Definition: Expr.h:3044
clang::NamedDecl::getNameAsString
std::string getNameAsString() const
Get a human-readable name for the declaration, even if it is one of the special kinds of names (C++ c...
Definition: Decl.h:292
clang::ObjCDictionaryLiteral::getNumElements
unsigned getNumElements() const
getNumElements - Return number of elements of objective-c dictionary literal.
Definition: ExprObjC.h:342
clang::APValue::getFloat
APFloat & getFloat()
Definition: APValue.h:260
clang::ExprObjectKind
ExprObjectKind
A further classification of the kind of object referenced by an l-value or x-value.
Definition: Specifiers.h:124
DeclarationName.h
clang::Type::isIntegralType
bool isIntegralType(const ASTContext &Ctx) const
Determine whether this type is an integral type.
Definition: Type.cpp:1759
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
IsImplicitBoolFloatConversion
static bool IsImplicitBoolFloatConversion(Sema &S, Expr *Ex, bool ToBool)
Definition: SemaChecking.cpp:10650
Initialization.h
clang::ASTContext::getAsConstantArrayType
const ConstantArrayType * getAsConstantArrayType(QualType T) const
Definition: ASTContext.h:2413
clang::Sema::SemaBuiltinShuffleVector
ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall)
SemaBuiltinShuffleVector - Handle __builtin_shufflevector.
Definition: SemaChecking.cpp:5662
clang::NeonTypeFlags::Poly16
Definition: TargetBuiltins.h:118
CheckNonNullExpr
static bool CheckNonNullExpr(Sema &S, const Expr *Expr)
Checks if a the given expression evaluates to null.
Definition: SemaChecking.cpp:3948
clang::NSAPI::ClassId_NSMutableSet
Definition: NSAPI.h:38
clang::ObjCMessageExpr::getSuperLoc
SourceLocation getSuperLoc() const
Retrieve the location of the &#39;super&#39; keyword for a class or instance message to &#39;super&#39;, otherwise an invalid source location.
Definition: ExprObjC.h:1248
clang::ASTContext::FloatTy
CanQualType FloatTy
Definition: ASTContext.h:1028
clang::FunctionDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:2285
AttrIterator.h
checkObjCArrayLiteral
static void checkObjCArrayLiteral(Sema &S, QualType TargetType, ObjCArrayLiteral *ArrayLiteral)
Check an Objective-C array literal being converted to the given target type.
Definition: SemaChecking.cpp:10777
clang::StringLiteral::isPascal
bool isPascal() const
Definition: Expr.h:1690
DiagnoseCStringFormatDirectiveInCFAPI
static void DiagnoseCStringFormatDirectiveInCFAPI(Sema &S, const NamedDecl *FDecl, Expr **Args, unsigned NumArgs)
Diagnose use of s directive in an NSString which is being passed as formatting string to formatting m...
Definition: SemaChecking.cpp:3994
CheckConditionalOperand
static void CheckConditionalOperand(Sema &S, Expr *E, QualType T, SourceLocation CC, bool &ICContext)
Definition: SemaChecking.cpp:11152
clang::ASTContext::getAsArrayType
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
Definition: ASTContext.cpp:5409
clang::AtomicExpr
AtomicExpr - Variadic atomic builtins: __atomic_exchange, __atomic_fetch_*, __atomic_load, __atomic_store, and __atomic_compare_exchange_*, for the similarly-named C++11 instructions, and __c11 variants for <stdatomic.h>, and corresponding __opencl_atomic_* for OpenCL 2.0.
Definition: Expr.h:5433
clang::Expr::NPC_ValueDependentIsNotNull
Specifies that a value-dependent expression should be considered to never be a null pointer constant...
Definition: Expr.h:719
clang::ASTContext::VoidTy
CanQualType VoidTy
Definition: ASTContext.h:1016
Ownership.h
CheckBoolLikeConversion
static void CheckBoolLikeConversion(Sema &S, Expr *E, SourceLocation CC)
Check conversion of given expression to boolean.
Definition: SemaChecking.cpp:11194
clang::analyze_format_string::OptionalFlag
Class representing optional flags with location and representation information.
Definition: FormatString.h:34
clang::CallExpr::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Expr.cpp:1437
clang::Expr::isValueDependent
bool isValueDependent() const
isValueDependent - Determines whether this expression is value-dependent (C++ [temp.dep.constexpr]).
Definition: Expr.h:149
clang::Sema::LookupAnyName
Look up any declaration with any name.
Definition: Sema.h:3095
clang::StringLiteral::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.h:1741
clang::CallExpr::arguments
arg_range arguments()
Definition: Expr.h:2585
clang::Expr::isKnownToHaveBooleanValue
bool isKnownToHaveBooleanValue() const
isKnownToHaveBooleanValue - Return true if this is an integer expression that is known to return 0 or...
Definition: Expr.cpp:134
llvm::SmallVector
Definition: LLVM.h:36
clang::Type::isObjCObjectPointerType
bool isObjCObjectPointerType() const
Definition: Type.h:6393
clang::Type::isAnyPointerType
bool isAnyPointerType() const
Definition: Type.h:6300
PrettyPrintInRange
static std::string PrettyPrintInRange(const llvm::APSInt &Value, IntRange Range)
Definition: SemaChecking.cpp:10640
isBlockPointer
static bool isBlockPointer(Expr *Arg)
Definition: SemaChecking.cpp:365
clang::Sema::FormatStringHasSArg
bool FormatStringHasSArg(const StringLiteral *FExpr)
Definition: SemaChecking.cpp:8305
clang::analyze_format_string::ArgType::isValid
bool isValid() const
Definition: FormatString.h:273
clang::ObjCPropertyDecl
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:729
clang::ImplicitCastExpr
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3115
clang::analyze_scanf::ScanfSpecifier
Definition: FormatString.h:631
clang::Type::isFunctionProtoType
bool isFunctionProtoType() const
Definition: Type.h:1947
UnresolvedSet.h
clang::Sema::RegisterTypeTagForDatatype
void RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind, uint64_t MagicValue, QualType Type, bool LayoutCompatible, bool MustBeNull)
Register a magic integral constant to be used as a type tag.
Definition: SemaChecking.cpp:13639
clang::APValue::isLValue
bool isLValue() const
Definition: APValue.h:238
clang::Type::getTypeClass
TypeClass getTypeClass() const
Definition: Type.h:1811
clang::UETT_AlignOf
Used for C&#39;s _Alignof and C++&#39;s alignof.
Definition: TypeTraits.h:101
clang::FunctionDecl::getMinRequiredArguments
unsigned getMinRequiredArguments() const
Returns the minimum number of arguments needed to call this function.
Definition: Decl.cpp:3076
clang::VarDecl::getSourceRange
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:1958
clang::BinaryOperator::isLogicalOp
static bool isLogicalOp(Opcode Opc)
Definition: Expr.h:3407
clang::AtomicType
Definition: Type.h:5968
clang::CharacterLiteral
Definition: Expr.h:1392
clang::Sema::hasCStrMethod
bool hasCStrMethod(const Expr *E)
Check to see if a given expression could have &#39;.c_str()&#39; called on it.
Definition: SemaChecking.cpp:7436
clang::ObjCMessageExpr::getMethodDecl
const ObjCMethodDecl * getMethodDecl() const
Definition: ExprObjC.h:1303
IsEnumConstOrFromMacro
static bool IsEnumConstOrFromMacro(Sema &S, Expr *E)
Definition: SemaChecking.cpp:9934
clang::FunctionDecl::getNameInfo
DeclarationNameInfo getNameInfo() const
Definition: Decl.h:1901
ExprOpenMP.h
clang::Type::isVectorType
bool isVectorType() const
Definition: Type.h:6381
clang::TargetInfo::validateCpuIs
virtual bool validateCpuIs(StringRef Name) const
Definition: TargetInfo.h:1111
clang::Qualifiers::OCL_Autoreleasing
Assigning into this object requires a lifetime extension.
Definition: Type.h:175
clang::TypeInfo
Definition: ASTContext.h:143
NonTrivialTypeVisitor.h
clang::ObjCMethodDecl::getSourceRange
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: DeclObjC.h:285
SemaBuiltinRWPipe
static bool SemaBuiltinRWPipe(Sema &S, CallExpr *Call)
Definition: SemaChecking.cpp:713
CheckMemaccessSize
static void CheckMemaccessSize(Sema &S, unsigned BId, const CallExpr *Call)
Diagnose cases like &#39;memset(buf, sizeof(buf), 0)&#39;, which should have the last two arguments transpose...
Definition: SemaChecking.cpp:8985
clang::analyze_printf::PrintfSpecifier
Definition: FormatString.h:485
clang::Scope::SEHFilterScope
We are currently in the filter expression of an SEH except block.
Definition: Scope.h:128
clang::ASTContext::hasSameUnqualifiedType
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2293
clang::isLowercase
LLVM_READONLY bool isLowercase(unsigned char c)
Return true if this character is a lowercase ASCII letter: [a-z].
Definition: CharInfo.h:100
clang::Lexer::getImmediateMacroName
static StringRef getImmediateMacroName(SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts)
Retrieve the name of the immediate macro expansion.
Definition: Lexer.cpp:968
clang::Lexer::getImmediateMacroNameForDiagnostics
static StringRef getImmediateMacroNameForDiagnostics(SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts)
Retrieve the name of the immediate macro expansion.
Definition: Lexer.cpp:1015
clang::MultiVersionKind::None
clang::Expr::getExprLoc
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:215
clang::ASTContext::getFloatTypeSemantics
const llvm::fltSemantics & getFloatTypeSemantics(QualType T) const
Return the APFloat &#39;semantics&#39; for the specified scalar floating point type.
Definition: ASTContext.cpp:1541
FormatString.h
clang::NSAPI::NSMutableDict_setObjectForKeyedSubscript
Definition: NSAPI.h:112
clang::analyze_printf::PrintfSpecifier::getConversionSpecifier
const PrintfConversionSpecifier & getConversionSpecifier() const
Definition: FormatString.h:545
clang::BinaryOperator::getLHS
Expr * getLHS() const
Definition: Expr.h:3327
clang::CompoundAssignOperator
CompoundAssignOperator - For compound assignments (e.g.
Definition: Expr.h:3504
Specifiers.h
Defines various enumerations that describe declaration and type specifiers.
clang::IdentifierInfo::getName
StringRef getName() const
Return the actual identifier string.
Definition: IdentifierTable.h:156
clang::ObjCMessageExpr::getInstanceReceiver
Expr * getInstanceReceiver()
Returns the object expression (receiver) for an instance message, or null for a message that is not a...
Definition: ExprObjC.h:1207
clang::ASTContext::UnsignedShortTy
CanQualType UnsignedShortTy
Definition: ASTContext.h:1026
clang::ASTContext::getTypedefType
QualType getTypedefType(const TypedefNameDecl *Decl, QualType Canon=QualType()) const
Return the unique reference to the type for the specified typedef-name decl.
Definition: ASTContext.cpp:3890
clang::TypedefNameDecl
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2916
clang::QualType::withVolatile
QualType withVolatile() const
Definition: Type.h:818
clang::ASTContext::CharTy
CanQualType CharTy
Definition: ASTContext.h:1018
clang::Sema::PerformCopyInitialization
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:9125
clang::Type::isPipeType
bool isPipeType() const
Definition: Type.h:6477
clang::Sema::FST_OSTrace
Definition: Sema.h:10563
clang::NullStmt
NullStmt - This is the null statement ";": C99 6.8.3p3.
Definition: Stmt.h:1210
Decl.h
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::ASTContext::getFloatingTypeOrder
int getFloatingTypeOrder(QualType LHS, QualType RHS) const
Compare the rank of the two specified floating point types, ignoring the domain of the type (i...
Definition: ASTContext.cpp:5601
clang::DeclarationNameInfo::getAsString
std::string getAsString() const
getAsString - Retrieve the human-readable string for this name.
Definition: DeclarationName.cpp:454
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:108
getAsSizeOfExpr
static const UnaryExprOrTypeTraitExpr * getAsSizeOfExpr(const Expr *E)
Definition: SemaChecking.cpp:8833
clang::DeclContext
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
clang::AtomicExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.h:5526
clang::ObjCPropertyRefExpr::getLocation
SourceLocation getLocation() const
Definition: ExprObjC.h:726
clang::Expr::EvalResult
EvalResult is a struct with detailed info about an evaluated expression.
Definition: Expr.h:571
clang::ObjCPropertyDecl::getPropertyAttributesAsWritten
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:852
clang::analyze_format_string::ConversionSpecifier::getKind
Kind getKind() const
Definition: FormatString.h:221
clang::Sema::GetFormatNSStringIdx
static bool GetFormatNSStringIdx(const FormatAttr *Format, unsigned &Idx)
Definition: SemaChecking.cpp:3981
clang::OverloadedOperatorKind
OverloadedOperatorKind
Enumeration specifying the different kinds of C++ overloaded operators.
Definition: OperatorKinds.h:22
clang::Scope::getParent
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:226
clang::Sema::ImpCastExprToType
ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, ExprValueKind VK=VK_RValue, const CXXCastPath *BasePath=nullptr, CheckedConversionKind CCK=CCK_ImplicitConversion)
ImpCastExprToType - If Expr is not of type &#39;Type&#39;, insert an implicit cast.
Definition: Sema.cpp:474
clang::ObjCObjectPointerType::getTypeArgs
ArrayRef< QualType > getTypeArgs() const
Retrieve the type arguments for this type.
Definition: Type.h:5902
clang::tooling::fixit::internal::getSourceRange
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
clang::Scope::isSEHExceptScope
bool isSEHExceptScope() const
Determine whether this scope is a SEH &#39;__except&#39; block.
Definition: Scope.h:441
clang::NSAPI::NSMutableArr_insertObjectAtIndex
Definition: NSAPI.h:87
AnalyzeBitFieldAssignment
static bool AnalyzeBitFieldAssignment(Sema &S, FieldDecl *Bitfield, Expr *Init, SourceLocation InitLoc)
Analyzes an attempt to assign the given value to a bitfield.
Definition: SemaChecking.cpp:10325
clang::TargetInfo::SignedLong
Definition: TargetInfo.h:166
isX86_32Builtin
static bool isX86_32Builtin(unsigned BuiltinID)
Definition: SemaChecking.cpp:3553
clang::Sema::CheckLiteralKind
ObjCLiteralKind CheckLiteralKind(Expr *FromE)
Definition: SemaExpr.cpp:9789
type
clang::Sema::DiagRuntimeBehavior
bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, const PartialDiagnostic &PD)
Conditionally issue a diagnostic based on the current evaluation context.
Definition: SemaExpr.cpp:15929
IteratorComparison::getOpcode
BinaryOperator::Opcode getOpcode(const SymExpr *SE)
clang::ASTContext::UnsignedLongLongTy
CanQualType UnsignedLongLongTy
Definition: ASTContext.h:1027
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static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:118
getAbsoluteValueArgumentType
static QualType getAbsoluteValueArgumentType(ASTContext &Context, unsigned AbsType)
Definition: SemaChecking.cpp:8373
clang::NullStmt::getSemiLoc
SourceLocation getSemiLoc() const
Definition: Stmt.h:1221
clang::CC_C
Definition: Specifiers.h:237
clang::DeclarationName
The name of a declaration.
Definition: DeclarationName.h:146
clang::Stmt::getStmtClass
StmtClass getStmtClass() const
Definition: Stmt.h:1029
clang::QualType::getAsString
static std::string getAsString(SplitQualType split, const PrintingPolicy &Policy)
Definition: Type.h:971
clang::Type::isBooleanType
bool isBooleanType() const
Definition: Type.h:6657
clang::CXXConstructExpr::isListInitialization
bool isListInitialization() const
Whether this constructor call was written as list-initialization.
Definition: ExprCXX.h:1353
clang::Expr::NPCK_ZeroExpression
Expression is a Null pointer constant built from a zero integer expression that is not a simple...
Definition: Expr.h:695
clang::cast
U cast(CodeGen::Address addr)
Definition: Address.h:109
isSetterLikeSelector
static bool isSetterLikeSelector(Selector sel)
Check for a keyword selector that starts with the word &#39;add&#39; or &#39;set&#39;.
Definition: SemaChecking.cpp:12791
clang::UnresolvedSet
A set of unresolved declarations.
Definition: UnresolvedSet.h:144
clang::EnumDecl
Represents an enum.
Definition: Decl.h:3326
clang::Expr::NPCK_CXX11_nullptr
Expression is a C++11 nullptr.
Definition: Expr.h:701
clang::Sema::FST_OSLog
Definition: Sema.h:10564
clang::Expr::isIntegerConstantExpr
bool isIntegerConstantExpr(llvm::APSInt &Result, const ASTContext &Ctx, SourceLocation *Loc=nullptr, bool isEvaluated=true) const
isIntegerConstantExpr - Return true if this expression is a valid integer constant expression...
Definition: ExprConstant.cpp:11569
clang::analyze_printf::PrintfSpecifier::isPrivate
const OptionalFlag & isPrivate() const
Definition: FormatString.h:578
clang::NeonTypeFlags
Flags to identify the types for overloaded Neon builtins.
Definition: TargetBuiltins.h:103
SemaBuiltinMemChkCall
static void SemaBuiltinMemChkCall(Sema &S, FunctionDecl *FDecl, CallExpr *TheCall, unsigned SizeIdx, unsigned DstSizeIdx, StringRef LikelyMacroName)
Definition: SemaChecking.cpp:239
clang::CallExpr::getCallReturnType
QualType getCallReturnType(const ASTContext &Ctx) const
getCallReturnType - Get the return type of the call expr.
Definition: Expr.cpp:1396
clang::Sema::CheckCastAlign
void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange)
CheckCastAlign - Implements -Wcast-align, which warns when a pointer cast increases the alignment req...
Definition: SemaChecking.cpp:12284
clang::analyze_format_string::FormatSpecifier::getCorrectedLengthModifier
Optional< LengthModifier > getCorrectedLengthModifier() const
Definition: FormatString.cpp:948
findRetainCycleOwner
static bool findRetainCycleOwner(Sema &S, Expr *e, RetainCycleOwner &owner)
Definition: SemaChecking.cpp:12607
clang::DefaultInitializedTypeVisitor
Definition: NonTrivialTypeVisitor.h:51
IsSameCharType
static bool IsSameCharType(QualType T1, QualType T2)
Definition: SemaChecking.cpp:13652
clang::LangAS::opencl_global
Tree
SyntaxTree::Impl & Tree
Definition: ASTDiff.cpp:193
clang::DeclContext::specific_decl_iterator
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2017
clang::TargetInfo::hasFeature
virtual bool hasFeature(StringRef Feature) const
Determine whether the given target has the given feature.
Definition: TargetInfo.h:1085
clang::Sema::SemaConvertVectorExpr
ExprResult SemaConvertVectorExpr(Expr *E, TypeSourceInfo *TInfo, SourceLocation BuiltinLoc, SourceLocation RParenLoc)
SemaConvertVectorExpr - Handle __builtin_convertvector.
Definition: SemaChecking.cpp:5748
clang::Expr::IgnoreParenImpCasts
Expr * IgnoreParenImpCasts() LLVM_READONLY
IgnoreParenImpCasts - Ignore parentheses and implicit casts.
Definition: Expr.cpp:2693
clang::FunctionDecl::param_end
param_iterator param_end()
Definition: Decl.h:2275
SemaBuiltinOverflow
static bool SemaBuiltinOverflow(Sema &S, CallExpr *TheCall)
Definition: SemaChecking.cpp:194
clang::APIntStorage::getValue
llvm::APInt getValue() const
Definition: Expr.h:1292
clang::SourceLocation::isMacroID
bool isMacroID() const
Definition: SourceLocation.h:101
clang::ObjCObjectPointerType
Represents a pointer to an Objective C object.
Definition: Type.h:5794
clang::TypeLoc::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Get the full source range.
Definition: TypeLoc.h:151
clang::analyze_printf::PrintfSpecifier::hasValidAlternativeForm
bool hasValidAlternativeForm() const
Definition: PrintfFormatString.cpp:911
clang::StringLiteral::getByteLength
unsigned getByteLength() const
Definition: Expr.h:1677
clang::BlockPointerType
Pointer to a block type.
Definition: Type.h:2639
clang::Type::TypeClass
TypeClass
Definition: Type.h:1409
clang::NeonTypeFlags::Int8
Definition: TargetBuiltins.h:113
clang::ASTContext::getIntWidth
unsigned getIntWidth(QualType T) const
Definition: ASTContext.cpp:9152
clang::SourceManager::getFileID
FileID getFileID(SourceLocation SpellingLoc) const
Return the FileID for a SourceLocation.
Definition: SourceManager.h:1048
SemaOpenCLBuiltinToAddr
static bool SemaOpenCLBuiltinToAddr(Sema &S, unsigned BuiltinID, CallExpr *Call)
Definition: SemaChecking.cpp:839
getBestAbsFunction
static unsigned getBestAbsFunction(ASTContext &Context, QualType ArgType, unsigned AbsFunctionKind)
Definition: SemaChecking.cpp:8395
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4370
clang::ComplexType
Complex values, per C99 6.2.5p11.
Definition: Type.h:2477
clang::SourceManager::isMacroArgExpansion
bool isMacroArgExpansion(SourceLocation Loc, SourceLocation *StartLoc=nullptr) const
Tests whether the given source location represents a macro argument&#39;s expansion into the function-lik...
Definition: SourceManager.cpp:996
checkOpenCLSubgroupExt
static bool checkOpenCLSubgroupExt(Sema &S, CallExpr *Call)
Definition: SemaChecking.cpp:404
TemplateBase.h
clang::analyze_format_string::OptionalAmount::getHowSpecified
HowSpecified getHowSpecified() const
Definition: FormatString.h:335
clang::analyze_printf::PrintfSpecifier::hasValidFieldWidth
bool hasValidFieldWidth() const
Definition: PrintfFormatString.cpp:1063
clang::ArraySubscriptExpr
ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting.
Definition: Expr.h:2312
StringLiteralCheckType
StringLiteralCheckType
Definition: SemaChecking.cpp:6211
clang::StringLiteral::isUTF32
bool isUTF32() const
Definition: Expr.h:1689
clang::Type::getCanonicalTypeInternal
QualType getCanonicalTypeInternal() const
Definition: Type.h:2355
clang::ObjCArrayLiteral::getNumElements
unsigned getNumElements() const
getNumElements - Return number of elements of objective-c array literal.
Definition: ExprObjC.h:210
clang::Sema::ObjCLiteralKind
ObjCLiteralKind
Definition: Sema.h:2738
clang::AbstractConditionalOperator
AbstractConditionalOperator - An abstract base class for ConditionalOperator and BinaryConditionalOpe...
Definition: Expr.h:3540
clang::ConstantArrayTypeLoc
Definition: TypeLoc.h:1510
clang::Type::isReserveIDT
bool isReserveIDT() const
Definition: Type.h:6466
clang::Type::isIntegerType
bool isIntegerType() const
isIntegerType() does not include complex integers (a GCC extension).
Definition: Type.h:6578
checkOpenCLEnqueueIntType
static bool checkOpenCLEnqueueIntType(Sema &S, Expr *E, const QualType &IntType)
Diagnose integer type and any valid implicit conversion to it.
Definition: SemaChecking.cpp:11311
clang::ASTContext::UnsignedLongTy
CanQualType UnsignedLongTy
Definition: ASTContext.h:1026
clang::analyze_format_string::OptionalAmount::getArgType
ArgType getArgType(ASTContext &Ctx) const
Definition: FormatString.cpp:561
SemaBuiltinReserveRWPipe
static bool SemaBuiltinReserveRWPipe(Sema &S, CallExpr *Call)
Definition: SemaChecking.cpp:768
clang::CallExpr::arg_begin
arg_iterator arg_begin()
Definition: Expr.h:2590
clang::QualType::hasNonTrivialObjCLifetime
bool hasNonTrivialObjCLifetime() const
Definition: Type.h:1062
clang::ASTContext::GetBuiltinTypeError
GetBuiltinTypeError
Definition: ASTContext.h:2002
clang::Decl::getAttr
T * getAttr() const
Definition: DeclBase.h:527
clang::ConstantArrayType::getSize
const llvm::APInt & getSize() const
Definition: Type.h:2890
clang::ASTContext::getCharWidth
uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2074
clang::NSAPI::NSMutableDict_setValueForKey
Definition: NSAPI.h:113
clang::Sema::getCurFunctionDecl
FunctionDecl * getCurFunctionDecl()
getCurFunctionDecl - If inside of a function body, this returns a pointer to the function decl for th...
Definition: Sema.cpp:1203
clang::Type::isAtomicType
bool isAtomicType() const
Definition: Type.h:6406
isKnownToHaveUnsignedValue
static bool isKnownToHaveUnsignedValue(Expr *E)
Definition: SemaChecking.cpp:9948
clang::Type::isFunctionType
bool isFunctionType() const
Definition: Type.h:6292
RFT
static unsigned RFT(unsigned t, bool shift=false, bool ForceQuad=false)
Definition: SemaChecking.cpp:1487
clang::DeclaratorDecl::getTypeSourceInfo
TypeSourceInfo * getTypeSourceInfo() const
Definition: Decl.h:716
checkObjCDictionaryLiteral
static void checkObjCDictionaryLiteral(Sema &S, QualType TargetType, ObjCDictionaryLiteral *DictionaryLiteral)
Check an Objective-C dictionary literal being converted to the given target type. ...
Definition: SemaChecking.cpp:10806
clang::Sema::VAK_Invalid
Definition: Sema.h:9481
clang::ExtVectorType
ExtVectorType - Extended vector type.
Definition: Type.h:3287
clang::analyze_printf::PrintfSpecifier::getPrecision
const OptionalAmount & getPrecision() const
Definition: FormatString.h:554
clang::UnaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:1921
clang::NeonTypeFlags::Float32
Definition: TargetBuiltins.h:122
clang::BinaryOperator::isAdditiveOp
static bool isAdditiveOp(Opcode Opc)
Definition: Expr.h:3363
clang::BuiltinType::isInteger
bool isInteger() const
Definition: Type.h:2431
IsSameFloatAfterCast
static bool IsSameFloatAfterCast(const llvm::APFloat &value, const llvm::fltSemantics &Src, const llvm::fltSemantics &Tgt)
Checks whether the given value, which currently has the given source semantics, has the same value wh...
Definition: SemaChecking.cpp:9897
clang::ASTContext::hasSameType
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2269
clang::CC_Win64
Definition: Specifiers.h:243
clang::ObjCInterfaceDecl::getCanonicalDecl
ObjCInterfaceDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C class.
Definition: DeclObjC.h:1915
GetMatchingCType
static bool GetMatchingCType(const IdentifierInfo *ArgumentKind, const Expr *TypeExpr, const ASTContext &Ctx, const llvm::DenseMap< Sema::TypeTagMagicValue, Sema::TypeTagData > *MagicValues, bool &FoundWrongKind, Sema::TypeTagData &TypeInfo)
Retrieve the C type corresponding to type tag TypeExpr.
Definition: SemaChecking.cpp:13595
clang::TemplateArgument::Type
The template argument is a type.
Definition: TemplateBase.h:60
sumOffsets
static void sumOffsets(llvm::APSInt &Offset, llvm::APSInt Addend, BinaryOperatorKind BinOpKind, bool AddendIsRight)
Definition: SemaChecking.cpp:6219
clang::FixItHint::CreateInsertion
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:92
clang::analyze_format_string::ArgType::Match
Definition: FormatString.h:254
clang::analyze_printf::PrintfSpecifier::isPublic
const OptionalFlag & isPublic() const
Definition: FormatString.h:579
clang::Sema::NSArrayDecl
ObjCInterfaceDecl * NSArrayDecl
The declaration of the Objective-C NSArray class.
Definition: Sema.h:890
PartialDiagnostic.h
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
clang::ObjCIvarRefExpr::getBase
const Expr * getBase() const
Definition: ExprObjC.h:547
clang::Type::getNullability
Optional< NullabilityKind > getNullability(const ASTContext &context) const
Determine the nullability of the given type.
Definition: Type.cpp:3696
emitReplacement
static void emitReplacement(Sema &S, SourceLocation Loc, SourceRange Range, unsigned AbsKind, QualType ArgType)
Definition: SemaChecking.cpp:8530
clang::APValue
APValue - This class implements a discriminated union of [uninitialized] [APSInt] [APFloat]...
Definition: APValue.h:38
clang::Sema::isValidPointerAttrType
bool isValidPointerAttrType(QualType T, bool RefOkay=false)
Determine if type T is a valid subject for a nonnull and similar attributes.
isSameWidthConstantConversion
static bool isSameWidthConstantConversion(Sema &S, Expr *E, QualType T, SourceLocation CC)
Definition: SemaChecking.cpp:10835
clang::CXXBaseSpecifier
Represents a base class of a C++ class.
Definition: DeclCXX.h:192
clang::ASTContext::getTypeSize
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2070
clang::Type::isObjectType
bool isObjectType() const
Determine whether this type is an object type.
Definition: Type.h:1866
checkBuiltinArgument
static bool checkBuiltinArgument(Sema &S, CallExpr *E, unsigned ArgIndex)
checkBuiltinArgument - Given a call to a builtin function, perform normal type-checking on the given ...
Definition: SemaChecking.cpp:4786
clang::ObjCIvarRefExpr
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:513
clang::Sema::DiscardMisalignedMemberAddress
void DiscardMisalignedMemberAddress(const Type *T, Expr *E)
This function checks if the expression is in the sef of potentially misaligned members and it is conv...
Definition: SemaChecking.cpp:13782
clang::Type::isObjCObjectType
bool isObjCObjectType() const
Definition: Type.h:6397
clang::Type::isIncompleteType
bool isIncompleteType(NamedDecl **Def=nullptr) const
Types are partitioned into 3 broad categories (C99 6.2.5p1): object types, function types...
Definition: Type.cpp:2031
clang::Sema::LookupQualifiedName
bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, bool InUnqualifiedLookup=false)
Perform qualified name lookup into a given context.
Definition: SemaLookup.cpp:2013
clang::Sema::FST_FreeBSDKPrintf
Definition: Sema.h:10562
clang::analyze_printf::PrintfSpecifier::hasSpacePrefix
const OptionalFlag & hasSpacePrefix() const
Definition: FormatString.h:576
clang::ASTContext::getCanonicalType
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2253
clang::Decl::specific_attrs
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:513
CheckImplicitConversion
static void CheckImplicitConversion(Sema &S, Expr *E, QualType T, SourceLocation CC, bool *ICContext=nullptr)
Definition: SemaChecking.cpp:10860
clang::analyze_format_string::OptionalAmount::getConstantLength
unsigned getConstantLength() const
Definition: FormatString.h:355
clang::ASTContext::getFieldOffset
uint64_t getFieldOffset(const ValueDecl *FD) const
Get the offset of a FieldDecl or IndirectFieldDecl, in bits.
Definition: RecordLayoutBuilder.cpp:3106
clang::TypeSourceInfo::getTypeLoc
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:238
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2156
clang::Qualifiers::OCL_Weak
Reading or writing from this object requires a barrier call.
Definition: Type.h:172
clang::Type::isQueueT
bool isQueueT() const
Definition: Type.h:6462
DiagnoseNullConversion
static void DiagnoseNullConversion(Sema &S, Expr *E, QualType T, SourceLocation CC)
Definition: SemaChecking.cpp:10690
clang::ObjCIvarRefExpr::isFreeIvar
bool isFreeIvar() const
Definition: ExprObjC.h:552
DeclCXX.h
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
clang::FunctionProtoType::getParamType
QualType getParamType(unsigned i) const
Definition: Type.h:3890
clang::Expr::NPCK_ZeroLiteral
Expression is a Null pointer constant built from a literal zero.
Definition: Expr.h:698
clang::ASTContext::typesAreCompatible
bool typesAreCompatible(QualType T1, QualType T2, bool CompareUnqualified=false)
Compatibility predicates used to check assignment expressions.
Definition: ASTContext.cpp:8440
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static StringLiteralCheckType checkFormatStringExpr(Sema &S, const Expr *E, ArrayRef< const Expr *> Args, bool HasVAListArg, unsigned format_idx, unsigned firstDataArg, Sema::FormatStringType Type, Sema::VariadicCallType CallType, bool InFunctionCall, llvm::SmallBitVector &CheckedVarArgs, UncoveredArgHandler &UncoveredArg, llvm::APSInt Offset)
Definition: SemaChecking.cpp:6328
clang::Stmt::printPretty
void printPretty(raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\, const ASTContext *Context=nullptr) const
Definition: StmtPrinter.cpp:2383
SemaBuiltinSEHScopeCheck
static bool SemaBuiltinSEHScopeCheck(Sema &SemaRef, CallExpr *TheCall, Scope::ScopeFlags NeededScopeFlags, unsigned DiagID)
Definition: SemaChecking.cpp:343
clang::Sema::DiagnoseEmptyStmtBody
void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, const Stmt *Body, unsigned DiagID)
Emit DiagID if statement located on StmtLoc has a suspicious null statement as a Body, and it is located on the same line.
Definition: SemaChecking.cpp:13183
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:2682
HasEnumType
static bool HasEnumType(Expr *E)
Definition: SemaChecking.cpp:10079
clang::UETT_SizeOf
Definition: TypeTraits.h:98
SourceLocation.h
Defines the clang::SourceLocation class and associated facilities.
clang::QualType::getUnqualifiedType
QualType getUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:6152
SyncScope.h
Provides definitions for the atomic synchronization scopes.
clang::Sema::getLocationOfStringLiteralByte
SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, unsigned ByteNo) const
Definition: SemaChecking.cpp:102
clang::Qualifiers::hasUnaligned
bool hasUnaligned() const
Definition: Type.h:297
clang::APValue::getComplexFloatImag
APFloat & getComplexFloatImag()
Definition: APValue.h:292
clang::Type::hasSignedIntegerRepresentation
bool hasSignedIntegerRepresentation() const
Determine whether this type has an signed integer representation of some sort, e.g., it is an signed integer type or a vector.
Definition: Type.cpp:1874
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
clang::Sema::Compatible
Compatible - the types are compatible according to the standard.
Definition: Sema.h:9524
AVK_Integer
Definition: SemaChecking.cpp:8415
clang::NeonTypeFlags::isQuad
bool isQuad() const
Definition: TargetBuiltins.h:140
clang::ConditionalOperator::getTrueExpr
Expr * getTrueExpr() const
Definition: Expr.h:3620
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:6544
clang::FunctionDecl::getBuiltinID
unsigned getBuiltinID() const
Returns a value indicating whether this function corresponds to a builtin function.
Definition: Decl.cpp:2994
clang::Sema::LK_None
Definition: Sema.h:2745
CheckNonNullArgument
static void CheckNonNullArgument(Sema &S, const Expr *ArgExpr, SourceLocation CallSiteLoc)
Definition: SemaChecking.cpp:3973
clang::Type::hasIntegerRepresentation
bool hasIntegerRepresentation() const
Determine whether this type has an integer representation of some sort, e.g., it is an integer type o...
Definition: Type.cpp:1733
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6099
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:109
clang::EnumDecl::getNumNegativeBits
unsigned getNumNegativeBits() const
Returns the width in bits required to store all the negative enumerators of this enum.
Definition: Decl.h:3517
clang::analyze_format_string::PositionContext
PositionContext
Definition: FormatString.h:675
clang::analyze_scanf::ScanfSpecifier::consumesDataArgument
bool consumesDataArgument() const
Definition: FormatString.h:654
clang::ConditionalOperator::getRHS
Expr * getRHS() const
Definition: Expr.h:3628
clang::ObjCIvarDecl
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1945
isArgumentExpandedFromMacro
static bool isArgumentExpandedFromMacro(SourceManager &SM, SourceLocation CallLoc, SourceLocation ArgLoc)
Check if the ArgLoc originated from a macro passed to the call at CallLoc.
Definition: SemaChecking.cpp:8973
clang::WhileStmt
WhileStmt - This represents a &#39;while&#39; stmt.
Definition: Stmt.h:2063
SemaBuiltinCpuIs
static bool SemaBuiltinCpuIs(Sema &S, CallExpr *TheCall)
SemaBuiltinCpuIs - Handle __builtin_cpu_is(char *).
Definition: SemaChecking.cpp:3231
clang::ObjCPropertyDecl::OBJC_PR_assign
Definition: DeclObjC.h:737
LT
ASTImporterLookupTable & LT
Definition: ASTImporterLookupTable.cpp:24
clang::ASTContext::BuiltinInfo
Builtin::Context & BuiltinInfo
Definition: ASTContext.h:568
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:336
Expr.h
clang::ASTContext::getPointerType
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
Definition: ASTContext.cpp:2847
AnalyzeImplicitConversions
static void AnalyzeImplicitConversions(Sema &S, Expr *E, SourceLocation CC)
AnalyzeImplicitConversions - Find and report any interesting implicit conversions in the given expres...
Definition: SemaChecking.cpp:11205
clang::FixItHint::CreateReplacement
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:129
clang::BuiltinType
This class is used for builtin types like &#39;int&#39;.
Definition: Type.h:2391
clang::ObjCMethodDecl::isVariadic
bool isVariadic() const
Definition: DeclObjC.h:427
getSizeOfArgType
static QualType getSizeOfArgType(const Expr *E)
If E is a sizeof expression, returns its argument type.
Definition: SemaChecking.cpp:8850
clang::Sema::getSourceManager
SourceManager & getSourceManager() const
Definition: Sema.h:1236
clang::Sema::FST_Printf
Definition: Sema.h:10557
clang::ASTContext::GetBuiltinType
QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, unsigned *IntegerConstantArgs=nullptr) const
Return the type for the specified builtin.
Definition: ASTContext.cpp:9517
clang::Stmt::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:276
clang::NSAPI::ClassId_NSMutableOrderedSet
Definition: NSAPI.h:39
clang::StringLiteral
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1566
TargetInfo.h
Defines the clang::TargetInfo interface.
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2396
clang::EnumDecl::getIntegerType
QualType getIntegerType() const
Return the integer type this enum decl corresponds to.
Definition: Decl.h:3480
clang::NeonTypeFlags::Int32
Definition: TargetBuiltins.h:115
clang::NamedDecl::getName
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:276
clang::ExprError
ExprResult ExprError()
Definition: Ownership.h:283
clang::NSAPI::NSMutableArr_setObjectAtIndexedSubscript
Definition: NSAPI.h:88
clang::analyze_format_string::FormatSpecifier::hasStandardConversionSpecifier
bool hasStandardConversionSpecifier(const LangOptions &LangOpt) const
Definition: FormatString.cpp:887
max
__DEVICE__ int max(int __a, int __b)
Definition: __clang_cuda_device_functions.h:1611
getKind
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:954
clang::ASTContext::IntTy
CanQualType IntTy
Definition: ASTContext.h:1025
clang::LangAS::opencl_constant
clang::SC_Register
Definition: Specifiers.h:215
clang::Sema::DiagnoseSelfMove
void DiagnoseSelfMove(const Expr *LHSExpr, const Expr *RHSExpr, SourceLocation OpLoc)
Warn if a value is moved to itself.
Definition: SemaChecking.cpp:13273
clang::Type::isDependentType
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:2079
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1041
clang::DiagnosticsEngine::isIgnored
bool isIgnored(unsigned DiagID, SourceLocation Loc) const
Determine whether the diagnostic is known to be ignored.
Definition: Diagnostic.h:819
clang::TagDecl::isUnion
bool isUnion() const
Definition: Decl.h:3252
getAbsoluteValueFunctionKind
static unsigned getAbsoluteValueFunctionKind(const FunctionDecl *FDecl)
Definition: SemaChecking.cpp:8497
clang::BinaryOperator::getRHS
Expr * getRHS() const
Definition: Expr.h:3329
SemaBuiltinAddressof
static bool SemaBuiltinAddressof(Sema &S, CallExpr *TheCall)
Check that the argument to __builtin_addressof is a glvalue, and set the result type to the correspon...
Definition: SemaChecking.cpp:180
clang::analyze_format_string::ParsePrintfString
bool ParsePrintfString(FormatStringHandler &H, const char *beg, const char *end, const LangOptions &LO, const TargetInfo &Target, bool isFreeBSDKPrintf)
Definition: PrintfFormatString.cpp:403
AttributeLangSupport::C
Definition: SemaDeclAttr.cpp:45
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6296
min
__DEVICE__ int min(int __a, int __b)
Definition: __clang_cuda_device_functions.h:1618
clang::TypedefType
Definition: Type.h:4151
clang::Sema::SourceMgr
SourceManager & SourceMgr
Definition: Sema.h:327
clang::Builtin::Context::isTSBuiltin
bool isTSBuiltin(unsigned ID) const
Return true if this function is a target-specific builtin.
Definition: Builtins.h:96
clang::analyze_format_string::OptionalAmount::getArgIndex
unsigned getArgIndex() const
Definition: FormatString.h:340
clang::ASTContext::getTypeSizeInChars
CharUnits getTypeSizeInChars(QualType T) const
Return the size of the specified (complete) type T, in characters.
Definition: ASTContext.cpp:2167
clang::FixItHint
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:66
clang::Sema::checkUnsafeExprAssigns
void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS)
checkUnsafeExprAssigns - Check whether +1 expr is being assigned to weak/__unsafe_unretained expressi...
Definition: SemaChecking.cpp:13087
clang::SourceManager::isInSystemMacro
bool isInSystemMacro(SourceLocation loc) const
Returns whether Loc is expanded from a macro in a system header.
Definition: SourceManager.h:1455
clang::Sema::checkUnsafeAssigns
bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS)
checkUnsafeAssigns - Check whether +1 expr is being assigned to weak/__unsafe_unretained type...
Definition: SemaChecking.cpp:13074
clang::LookupResult::suppressDiagnostics
void suppressDiagnostics()
Suppress the diagnostics that would normally fire because of this lookup.
Definition: Lookup.h:572
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:648
true
#define true
Definition: stdbool.h:32
IsInAnyMacroBody
static bool IsInAnyMacroBody(const SourceManager &SM, SourceLocation Loc)
Definition: SemaChecking.cpp:11360
clang::Type::isFloatingType
bool isFloatingType() const
Definition: Type.cpp:1921
clang::StringLiteral::isUTF16
bool isUTF16() const
Definition: Expr.h:1688
clang::ObjCPropertyRefExpr::getBase
const Expr * getBase() const
Definition: ExprObjC.h:719
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:198
clang::Sema::Context
ASTContext & Context
Definition: Sema.h:324
clang::CallExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.cpp:1428
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
getLargerAbsoluteValueFunction
static unsigned getLargerAbsoluteValueFunction(unsigned AbsFunction)
Definition: SemaChecking.cpp:8323
clang::analyze_format_string::ConversionSpecifier::toString
const char * toString() const
Definition: FormatString.cpp:612
clang::Sema::DiagnoseAlwaysNonNullPointer
void DiagnoseAlwaysNonNullPointer(Expr *E, Expr::NullPointerConstantKind NullType, bool IsEqual, SourceRange Range)
Diagnose pointers that are always non-null.
Definition: SemaChecking.cpp:11379
clang::ASTContext::BoolTy
CanQualType BoolTy
Definition: ASTContext.h:1017
GetExprRange
static IntRange GetExprRange(ASTContext &C, const Expr *E, unsigned MaxWidth)
Pseudo-evaluate the given integer expression, estimating the range of values it might take...
Definition: SemaChecking.cpp:9670
checkUnsafeAssignLiteral
static bool checkUnsafeAssignLiteral(Sema &S, SourceLocation Loc, Expr *RHS, bool isProperty)
Definition: SemaChecking.cpp:13031
clang::QualType::isConstant
bool isConstant(const ASTContext &Ctx) const
Definition: Type.h:773
clang::APValue::getInt
APSInt & getInt()
Definition: APValue.h:252
clang::ASTContext::DoubleTy
CanQualType DoubleTy
Definition: ASTContext.h:1028
GetValueRange
static IntRange GetValueRange(ASTContext &C, llvm::APSInt &value, unsigned MaxWidth)
Definition: SemaChecking.cpp:9617
SemaBuiltinAnnotation
static bool SemaBuiltinAnnotation(Sema &S, CallExpr *TheCall)
Check that the first argument to __builtin_annotation is an integer and the second argument is a non-...
Definition: SemaChecking.cpp:130
clang::InitializedEntity
Describes an entity that is being initialized.
Definition: Initialization.h:49
clang::Type::isFunctionPointerType
bool isFunctionPointerType() const
Definition: Type.h:6320
clang::NSAPI::ClassId_NSMutableDictionary
Definition: NSAPI.h:36
clang::Decl::isInStdNamespace
bool isInStdNamespace() const
Definition: DeclBase.cpp:357
clang::ObjCMessageExpr::isInstanceMessage
bool isInstanceMessage() const
Determine whether this is an instance message to either a computed object or to super.
Definition: ExprObjC.h:1195
clang::FunctionDecl::getNumParams
unsigned getNumParams() const
Return the number of parameters this function must have based on its FunctionType.
Definition: Decl.cpp:3055
clang::CallExpr::getCalleeDecl
Decl * getCalleeDecl()
Definition: Expr.h:2526
clang::BinaryOperator::isComparisonOp
static bool isComparisonOp(Opcode Opc)
Definition: Expr.h:3377
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:207
clang::analyze_format_string::ConversionSpecifier::getStandardSpecifier
Optional< ConversionSpecifier > getStandardSpecifier() const
Definition: FormatString.cpp:664
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:707
findCapturingExpr
static Expr * findCapturingExpr(Sema &S, Expr *e, RetainCycleOwner &owner)
Check whether the given argument is a block which captures a variable.
Definition: SemaChecking.cpp:12743
GetNSMutableDictionaryArgumentIndex
static Optional< int > GetNSMutableDictionaryArgumentIndex(Sema &S, ObjCMessageExpr *Message)
Definition: SemaChecking.cpp:12846
SemaBuiltinCallWithStaticChain
static bool SemaBuiltinCallWithStaticChain(Sema &S, CallExpr *BuiltinCall)
Definition: SemaChecking.cpp:280
clang::ASTContext::AtomicUsesUnsupportedLibcall
bool AtomicUsesUnsupportedLibcall(const AtomicExpr *E) const
Definition: ASTContext.cpp:10143
clang::ConstantArrayType
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2872
clang::SourceManager
This class handles loading and caching of source files into memory.
Definition: SourceManager.h:582
clang::BuiltinType::isUnsignedInteger
bool isUnsignedInteger() const
Definition: Type.h:2439
clang::driver::types::isObjC
bool isObjC(ID Id)
isObjC - Is this an "ObjC" input (Obj-C and Obj-C++ sources and headers).
Definition: Types.cpp:123
clang::Expr::NullPointerConstantKind
NullPointerConstantKind
Enumeration used to describe the kind of Null pointer constant returned from isNullPointerConstant()...
Definition: Expr.h:686
clang::Attr
Attr - This represents one attribute.
Definition: Attr.h:44
clang::analyze_format_string::ArgType::NoMatchPedantic
Definition: FormatString.h:254
clang::Decl::getLocation
SourceLocation getLocation() const
Definition: DeclBase.h:418
clang::NSAPI::NSMutableSet_addObject
Definition: NSAPI.h:126
clang::UsingShadowDecl
Represents a shadow declaration introduced into a scope by a (resolved) using declaration.
Definition: DeclCXX.h:3139
Std
LangStandard::Kind Std
Definition: InterpolatingCompilationDatabase.cpp:130
clang::Sema::CheckAddressOfOperand
QualType CheckAddressOfOperand(ExprResult &Operand, SourceLocation OpLoc)
CheckAddressOfOperand - The operand of & must be either a function designator or an lvalue designatin...
Definition: SemaExpr.cpp:11727
clang::TypeSourceInfo::getType
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:98
clang::ASTContext::OCLClkEventTy
CanQualType OCLClkEventTy
Definition: ASTContext.h:1053
clang::ObjCMethodDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: DeclObjC.h:367
clang::Sema::SemaDiagnosticBuilder
Helper class that creates diagnostics with optional template instantiation stacks.
Definition: Sema.h:1261
clang::Expr::IgnoreParens
Expr * IgnoreParens() LLVM_READONLY
IgnoreParens - Ignore parentheses.
Definition: Expr.cpp:2560
ShouldDiagnoseEmptyStmtBody
static bool ShouldDiagnoseEmptyStmtBody(const SourceManager &SourceMgr, SourceLocation StmtLoc, const NullStmt *Body)
Definition: SemaChecking.cpp:13152
clang::ASTContext::UnsignedIntTy
CanQualType UnsignedIntTy
Definition: ASTContext.h:1026
clang::analyze_format_string::FormatSpecifier
Definition: FormatString.h:383
clang::ASTContext::getSizeType
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
Definition: ASTContext.cpp:4958
getDeclAlign
static CharUnits getDeclAlign(Expr *E, CharUnits TypeAlign, ASTContext &Context)
A helper function to get the alignment of a Decl referred to by DeclRefExpr or MemberExpr.
Definition: SemaChecking.cpp:12271
clang::OMPArraySectionExpr::getBase
Expr * getBase()
An array section can be written only as Base[LowerBound:Length].
Definition: ExprOpenMP.h:82
clang::NSAPI::NSOrderedSet_setObjectAtIndex
Definition: NSAPI.h:128
clang::SourceManager::getTopMacroCallerLoc
SourceLocation getTopMacroCallerLoc(SourceLocation Loc) const
Definition: SourceManager.cpp:970
clang::QualType::getObjCLifetime
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1058
clang::QualType::PrimitiveCopyKind
PrimitiveCopyKind
Definition: Type.h:1099
clang::APValue::getVectorLength
unsigned getVectorLength() const
Definition: APValue.h:320