clang 10.0.0git

CodeGenFunction.cpp
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1 //===--- CodeGenFunction.cpp - Emit LLVM Code from ASTs for a Function ----===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This coordinates the per-function state used while generating code.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "CodeGenFunction.h"
14 #include "CGBlocks.h"
15 #include "CGCUDARuntime.h"
16 #include "CGCXXABI.h"
17 #include "CGCleanup.h"
18 #include "CGDebugInfo.h"
19 #include "CGOpenMPRuntime.h"
20 #include "CodeGenModule.h"
21 #include "CodeGenPGO.h"
22 #include "TargetInfo.h"
23 #include "clang/AST/ASTContext.h"
24 #include "clang/AST/ASTLambda.h"
25 #include "clang/AST/Attr.h"
26 #include "clang/AST/Decl.h"
27 #include "clang/AST/DeclCXX.h"
28 #include "clang/AST/StmtCXX.h"
29 #include "clang/AST/StmtObjC.h"
30 #include "clang/Basic/Builtins.h"
31 #include "clang/Basic/CodeGenOptions.h"
32 #include "clang/Basic/TargetInfo.h"
33 #include "clang/CodeGen/CGFunctionInfo.h"
34 #include "clang/Frontend/FrontendDiagnostic.h"
35 #include "llvm/IR/DataLayout.h"
36 #include "llvm/IR/Dominators.h"
37 #include "llvm/IR/FPEnv.h"
38 #include "llvm/IR/IntrinsicInst.h"
39 #include "llvm/IR/Intrinsics.h"
40 #include "llvm/IR/MDBuilder.h"
41 #include "llvm/IR/Operator.h"
42 #include "llvm/Transforms/Utils/PromoteMemToReg.h"
43 using namespace clang;
44 using namespace CodeGen;
45
46 /// shouldEmitLifetimeMarkers - Decide whether we need emit the life-time
47 /// markers.
48 static bool shouldEmitLifetimeMarkers(const CodeGenOptions &CGOpts,
49 const LangOptions &LangOpts) {
50 if (CGOpts.DisableLifetimeMarkers)
51 return false;
52
53 // Sanitizers may use markers.
54 if (CGOpts.SanitizeAddressUseAfterScope ||
55 LangOpts.Sanitize.has(SanitizerKind::HWAddress) ||
56 LangOpts.Sanitize.has(SanitizerKind::Memory))
57 return true;
58
59 // For now, only in optimized builds.
60 return CGOpts.OptimizationLevel != 0;
61 }
62
63 CodeGenFunction::CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext)
64 : CodeGenTypeCache(cgm), CGM(cgm), Target(cgm.getTarget()),
65 Builder(cgm, cgm.getModule().getContext(), llvm::ConstantFolder(),
66 CGBuilderInserterTy(this)),
67 SanOpts(CGM.getLangOpts().Sanitize), DebugInfo(CGM.getModuleDebugInfo()),
68 PGO(cgm), ShouldEmitLifetimeMarkers(shouldEmitLifetimeMarkers(
69 CGM.getCodeGenOpts(), CGM.getLangOpts())) {
70 if (!suppressNewContext)
71 CGM.getCXXABI().getMangleContext().startNewFunction();
72
73 llvm::FastMathFlags FMF;
74 if (CGM.getLangOpts().FastMath)
75 FMF.setFast();
76 if (CGM.getLangOpts().FiniteMathOnly) {
77 FMF.setNoNaNs();
78 FMF.setNoInfs();
79 }
80 if (CGM.getCodeGenOpts().NoNaNsFPMath) {
81 FMF.setNoNaNs();
82 }
83 if (CGM.getCodeGenOpts().NoSignedZeros) {
84 FMF.setNoSignedZeros();
85 }
86 if (CGM.getCodeGenOpts().ReciprocalMath) {
87 FMF.setAllowReciprocal();
88 }
89 if (CGM.getCodeGenOpts().Reassociate) {
90 FMF.setAllowReassoc();
91 }
92 Builder.setFastMathFlags(FMF);
93 SetFPModel();
94 }
95
96 CodeGenFunction::~CodeGenFunction() {
97 assert(LifetimeExtendedCleanupStack.empty() && "failed to emit a cleanup");
98
99 // If there are any unclaimed block infos, go ahead and destroy them
100 // now. This can happen if IR-gen gets clever and skips evaluating
101 // something.
102 if (FirstBlockInfo)
103 destroyBlockInfos(FirstBlockInfo);
104
105 if (getLangOpts().OpenMP && CurFn)
106 CGM.getOpenMPRuntime().functionFinished(*this);
107 }
108
109 // Map the LangOption for rounding mode into
110 // the corresponding enum in the IR.
111 static llvm::fp::RoundingMode ToConstrainedRoundingMD(
112 LangOptions::FPRoundingModeKind Kind) {
113
114 switch (Kind) {
115 case LangOptions::FPR_ToNearest: return llvm::fp::rmToNearest;
116 case LangOptions::FPR_Downward: return llvm::fp::rmDownward;
117 case LangOptions::FPR_Upward: return llvm::fp::rmUpward;
118 case LangOptions::FPR_TowardZero: return llvm::fp::rmTowardZero;
119 case LangOptions::FPR_Dynamic: return llvm::fp::rmDynamic;
120 }
121 llvm_unreachable("Unsupported FP RoundingMode");
122 }
123
124 // Map the LangOption for exception behavior into
125 // the corresponding enum in the IR.
126 static llvm::fp::ExceptionBehavior ToConstrainedExceptMD(
127 LangOptions::FPExceptionModeKind Kind) {
128
129 switch (Kind) {
130 case LangOptions::FPE_Ignore: return llvm::fp::ebIgnore;
131 case LangOptions::FPE_MayTrap: return llvm::fp::ebMayTrap;
132 case LangOptions::FPE_Strict: return llvm::fp::ebStrict;
133 }
134 llvm_unreachable("Unsupported FP Exception Behavior");
135 }
136
137 void CodeGenFunction::SetFPModel() {
138 auto fpRoundingMode = ToConstrainedRoundingMD(
139 getLangOpts().getFPRoundingMode());
140 auto fpExceptionBehavior = ToConstrainedExceptMD(
141 getLangOpts().getFPExceptionMode());
142
143 if (fpExceptionBehavior == llvm::fp::ebIgnore &&
144 fpRoundingMode == llvm::fp::rmToNearest)
145 // Constrained intrinsics are not used.
146 ;
147 else {
148 Builder.setIsFPConstrained(true);
149 Builder.setDefaultConstrainedRounding(fpRoundingMode);
150 Builder.setDefaultConstrainedExcept(fpExceptionBehavior);
151 }
152 }
153
154 CharUnits CodeGenFunction::getNaturalPointeeTypeAlignment(QualType T,
155 LValueBaseInfo *BaseInfo,
156 TBAAAccessInfo *TBAAInfo) {
157 return getNaturalTypeAlignment(T->getPointeeType(), BaseInfo, TBAAInfo,
158 /* forPointeeType= */ true);
159 }
160
161 CharUnits CodeGenFunction::getNaturalTypeAlignment(QualType T,
162 LValueBaseInfo *BaseInfo,
163 TBAAAccessInfo *TBAAInfo,
164 bool forPointeeType) {
165 if (TBAAInfo)
166 *TBAAInfo = CGM.getTBAAAccessInfo(T);
167
168 // Honor alignment typedef attributes even on incomplete types.
169 // We also honor them straight for C++ class types, even as pointees;
170 // there's an expressivity gap here.
171 if (auto TT = T->getAs<TypedefType>()) {
172 if (auto Align = TT->getDecl()->getMaxAlignment()) {
173 if (BaseInfo)
174 *BaseInfo = LValueBaseInfo(AlignmentSource::AttributedType);
175 return getContext().toCharUnitsFromBits(Align);
176 }
177 }
178
179 if (BaseInfo)
180 *BaseInfo = LValueBaseInfo(AlignmentSource::Type);
181
182 CharUnits Alignment;
183 if (T->isIncompleteType()) {
184 Alignment = CharUnits::One(); // Shouldn't be used, but pessimistic is best.
185 } else {
186 // For C++ class pointees, we don't know whether we're pointing at a
187 // base or a complete object, so we generally need to use the
188 // non-virtual alignment.
189 const CXXRecordDecl *RD;
190 if (forPointeeType && (RD = T->getAsCXXRecordDecl())) {
191 Alignment = CGM.getClassPointerAlignment(RD);
192 } else {
193 Alignment = getContext().getTypeAlignInChars(T);
194 if (T.getQualifiers().hasUnaligned())
195 Alignment = CharUnits::One();
196 }
197
198 // Cap to the global maximum type alignment unless the alignment
199 // was somehow explicit on the type.
200 if (unsigned MaxAlign = getLangOpts().MaxTypeAlign) {
201 if (Alignment.getQuantity() > MaxAlign &&
202 !getContext().isAlignmentRequired(T))
203 Alignment = CharUnits::fromQuantity(MaxAlign);
204 }
205 }
206 return Alignment;
207 }
208
209 LValue CodeGenFunction::MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T) {
210 LValueBaseInfo BaseInfo;
211 TBAAAccessInfo TBAAInfo;
212 CharUnits Alignment = getNaturalTypeAlignment(T, &BaseInfo, &TBAAInfo);
213 return LValue::MakeAddr(Address(V, Alignment), T, getContext(), BaseInfo,
214 TBAAInfo);
215 }
216
217 /// Given a value of type T* that may not be to a complete object,
218 /// construct an l-value with the natural pointee alignment of T.
219 LValue
220 CodeGenFunction::MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T) {
221 LValueBaseInfo BaseInfo;
222 TBAAAccessInfo TBAAInfo;
223 CharUnits Align = getNaturalTypeAlignment(T, &BaseInfo, &TBAAInfo,
224 /* forPointeeType= */ true);
225 return MakeAddrLValue(Address(V, Align), T, BaseInfo, TBAAInfo);
226 }
227
228
229 llvm::Type *CodeGenFunction::ConvertTypeForMem(QualType T) {
230 return CGM.getTypes().ConvertTypeForMem(T);
231 }
232
233 llvm::Type *CodeGenFunction::ConvertType(QualType T) {
234 return CGM.getTypes().ConvertType(T);
235 }
236
237 TypeEvaluationKind CodeGenFunction::getEvaluationKind(QualType type) {
238 type = type.getCanonicalType();
239 while (true) {
240 switch (type->getTypeClass()) {
241 #define TYPE(name, parent)
242 #define ABSTRACT_TYPE(name, parent)
243 #define NON_CANONICAL_TYPE(name, parent) case Type::name:
244 #define DEPENDENT_TYPE(name, parent) case Type::name:
245 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(name, parent) case Type::name:
246 #include "clang/AST/TypeNodes.inc"
247 llvm_unreachable("non-canonical or dependent type in IR-generation");
248
249 case Type::Auto:
250 case Type::DeducedTemplateSpecialization:
251 llvm_unreachable("undeduced type in IR-generation");
252
253 // Various scalar types.
254 case Type::Builtin:
255 case Type::Pointer:
256 case Type::BlockPointer:
257 case Type::LValueReference:
258 case Type::RValueReference:
259 case Type::MemberPointer:
260 case Type::Vector:
261 case Type::ExtVector:
262 case Type::FunctionProto:
263 case Type::FunctionNoProto:
264 case Type::Enum:
265 case Type::ObjCObjectPointer:
266 case Type::Pipe:
267 return TEK_Scalar;
268
269 // Complexes.
270 case Type::Complex:
271 return TEK_Complex;
272
273 // Arrays, records, and Objective-C objects.
274 case Type::ConstantArray:
275 case Type::IncompleteArray:
276 case Type::VariableArray:
277 case Type::Record:
278 case Type::ObjCObject:
279 case Type::ObjCInterface:
280 return TEK_Aggregate;
281
282 // We operate on atomic values according to their underlying type.
283 case Type::Atomic:
284 type = cast<AtomicType>(type)->getValueType();
285 continue;
286 }
287 llvm_unreachable("unknown type kind!");
288 }
289 }
290
291 llvm::DebugLoc CodeGenFunction::EmitReturnBlock() {
292 // For cleanliness, we try to avoid emitting the return block for
293 // simple cases.
294 llvm::BasicBlock *CurBB = Builder.GetInsertBlock();
295
296 if (CurBB) {
297 assert(!CurBB->getTerminator() && "Unexpected terminated block.");
298
299 // We have a valid insert point, reuse it if it is empty or there are no
300 // explicit jumps to the return block.
301 if (CurBB->empty() || ReturnBlock.getBlock()->use_empty()) {
302 ReturnBlock.getBlock()->replaceAllUsesWith(CurBB);
303 delete ReturnBlock.getBlock();
304 ReturnBlock = JumpDest();
305 } else
306 EmitBlock(ReturnBlock.getBlock());
307 return llvm::DebugLoc();
308 }
309
310 // Otherwise, if the return block is the target of a single direct
311 // branch then we can just put the code in that block instead. This
312 // cleans up functions which started with a unified return block.
313 if (ReturnBlock.getBlock()->hasOneUse()) {
314 llvm::BranchInst *BI =
315 dyn_cast<llvm::BranchInst>(*ReturnBlock.getBlock()->user_begin());
316 if (BI && BI->isUnconditional() &&
317 BI->getSuccessor(0) == ReturnBlock.getBlock()) {
318 // Record/return the DebugLoc of the simple 'return' expression to be used
319 // later by the actual 'ret' instruction.
320 llvm::DebugLoc Loc = BI->getDebugLoc();
321 Builder.SetInsertPoint(BI->getParent());
322 BI->eraseFromParent();
323 delete ReturnBlock.getBlock();
324 ReturnBlock = JumpDest();
325 return Loc;
326 }
327 }
328
329 // FIXME: We are at an unreachable point, there is no reason to emit the block
330 // unless it has uses. However, we still need a place to put the debug
331 // region.end for now.
332
333 EmitBlock(ReturnBlock.getBlock());
334 return llvm::DebugLoc();
335 }
336
337 static void EmitIfUsed(CodeGenFunction &CGF, llvm::BasicBlock *BB) {
338 if (!BB) return;
339 if (!BB->use_empty())
340 return CGF.CurFn->getBasicBlockList().push_back(BB);
341 delete BB;
342 }
343
344 void CodeGenFunction::FinishFunction(SourceLocation EndLoc) {
345 assert(BreakContinueStack.empty() &&
346 "mismatched push/pop in break/continue stack!");
347
348 bool OnlySimpleReturnStmts = NumSimpleReturnExprs > 0
349 && NumSimpleReturnExprs == NumReturnExprs
350 && ReturnBlock.getBlock()->use_empty();
351 // Usually the return expression is evaluated before the cleanup
352 // code. If the function contains only a simple return statement,
353 // such as a constant, the location before the cleanup code becomes
354 // the last useful breakpoint in the function, because the simple
355 // return expression will be evaluated after the cleanup code. To be
356 // safe, set the debug location for cleanup code to the location of
357 // the return statement. Otherwise the cleanup code should be at the
358 // end of the function's lexical scope.
359 //
360 // If there are multiple branches to the return block, the branch
361 // instructions will get the location of the return statements and
362 // all will be fine.
363 if (CGDebugInfo *DI = getDebugInfo()) {
364 if (OnlySimpleReturnStmts)
365 DI->EmitLocation(Builder, LastStopPoint);
366 else
367 DI->EmitLocation(Builder, EndLoc);
368 }
369
370 // Pop any cleanups that might have been associated with the
371 // parameters. Do this in whatever block we're currently in; it's
372 // important to do this before we enter the return block or return
373 // edges will be *really* confused.
374 bool HasCleanups = EHStack.stable_begin() != PrologueCleanupDepth;
375 bool HasOnlyLifetimeMarkers =
376 HasCleanups && EHStack.containsOnlyLifetimeMarkers(PrologueCleanupDepth);
377 bool EmitRetDbgLoc = !HasCleanups || HasOnlyLifetimeMarkers;
378 if (HasCleanups) {
379 // Make sure the line table doesn't jump back into the body for
380 // the ret after it's been at EndLoc.
381 Optional<ApplyDebugLocation> AL;
382 if (CGDebugInfo *DI = getDebugInfo()) {
383 if (OnlySimpleReturnStmts)
384 DI->EmitLocation(Builder, EndLoc);
385 else
386 // We may not have a valid end location. Try to apply it anyway, and
387 // fall back to an artificial location if needed.
388 AL = ApplyDebugLocation::CreateDefaultArtificial(*this, EndLoc);
389 }
390
391 PopCleanupBlocks(PrologueCleanupDepth);
392 }
393
394 // Emit function epilog (to return).
395 llvm::DebugLoc Loc = EmitReturnBlock();
396
397 if (ShouldInstrumentFunction()) {
398 if (CGM.getCodeGenOpts().InstrumentFunctions)
399 CurFn->addFnAttr("instrument-function-exit", "__cyg_profile_func_exit");
400 if (CGM.getCodeGenOpts().InstrumentFunctionsAfterInlining)
401 CurFn->addFnAttr("instrument-function-exit-inlined",
402 "__cyg_profile_func_exit");
403 }
404
405 // Emit debug descriptor for function end.
406 if (CGDebugInfo *DI = getDebugInfo())
407 DI->EmitFunctionEnd(Builder, CurFn);
408
409 // Reset the debug location to that of the simple 'return' expression, if any
410 // rather than that of the end of the function's scope '}'.
411 ApplyDebugLocation AL(*this, Loc);
412 EmitFunctionEpilog(*CurFnInfo, EmitRetDbgLoc, EndLoc);
413 EmitEndEHSpec(CurCodeDecl);
414
415 assert(EHStack.empty() &&
416 "did not remove all scopes from cleanup stack!");
417
418 // If someone did an indirect goto, emit the indirect goto block at the end of
419 // the function.
420 if (IndirectBranch) {
421 EmitBlock(IndirectBranch->getParent());
422 Builder.ClearInsertionPoint();
423 }
424
425 // If some of our locals escaped, insert a call to llvm.localescape in the
426 // entry block.
427 if (!EscapedLocals.empty()) {
428 // Invert the map from local to index into a simple vector. There should be
429 // no holes.
430 SmallVector<llvm::Value *, 4> EscapeArgs;
431 EscapeArgs.resize(EscapedLocals.size());
432 for (auto &Pair : EscapedLocals)
433 EscapeArgs[Pair.second] = Pair.first;
434 llvm::Function *FrameEscapeFn = llvm::Intrinsic::getDeclaration(
435 &CGM.getModule(), llvm::Intrinsic::localescape);
436 CGBuilderTy(*this, AllocaInsertPt).CreateCall(FrameEscapeFn, EscapeArgs);
437 }
438
439 // Remove the AllocaInsertPt instruction, which is just a convenience for us.
440 llvm::Instruction *Ptr = AllocaInsertPt;
441 AllocaInsertPt = nullptr;
442 Ptr->eraseFromParent();
443
444 // If someone took the address of a label but never did an indirect goto, we
445 // made a zero entry PHI node, which is illegal, zap it now.
446 if (IndirectBranch) {
447 llvm::PHINode *PN = cast<llvm::PHINode>(IndirectBranch->getAddress());
448 if (PN->getNumIncomingValues() == 0) {
449 PN->replaceAllUsesWith(llvm::UndefValue::get(PN->getType()));
450 PN->eraseFromParent();
451 }
452 }
453
454 EmitIfUsed(*this, EHResumeBlock);
455 EmitIfUsed(*this, TerminateLandingPad);
456 EmitIfUsed(*this, TerminateHandler);
457 EmitIfUsed(*this, UnreachableBlock);
458
459 for (const auto &FuncletAndParent : TerminateFunclets)
460 EmitIfUsed(*this, FuncletAndParent.second);
461
462 if (CGM.getCodeGenOpts().EmitDeclMetadata)
463 EmitDeclMetadata();
464
465 for (SmallVectorImpl<std::pair<llvm::Instruction *, llvm::Value *> >::iterator
466 I = DeferredReplacements.begin(),
467 E = DeferredReplacements.end();
468 I != E; ++I) {
469 I->first->replaceAllUsesWith(I->second);
470 I->first->eraseFromParent();
471 }
472
473 // Eliminate CleanupDestSlot alloca by replacing it with SSA values and
474 // PHIs if the current function is a coroutine. We don't do it for all
475 // functions as it may result in slight increase in numbers of instructions
476 // if compiled with no optimizations. We do it for coroutine as the lifetime
477 // of CleanupDestSlot alloca make correct coroutine frame building very
478 // difficult.
479 if (NormalCleanupDest.isValid() && isCoroutine()) {
480 llvm::DominatorTree DT(*CurFn);
481 llvm::PromoteMemToReg(
482 cast<llvm::AllocaInst>(NormalCleanupDest.getPointer()), DT);
483 NormalCleanupDest = Address::invalid();
484 }
485
486 // Scan function arguments for vector width.
487 for (llvm::Argument &A : CurFn->args())
488 if (auto *VT = dyn_cast<llvm::VectorType>(A.getType()))
489 LargestVectorWidth = std::max((uint64_t)LargestVectorWidth,
490 VT->getPrimitiveSizeInBits().getFixedSize());
491
492 // Update vector width based on return type.
493 if (auto *VT = dyn_cast<llvm::VectorType>(CurFn->getReturnType()))
494 LargestVectorWidth = std::max((uint64_t)LargestVectorWidth,
495 VT->getPrimitiveSizeInBits().getFixedSize());
496
497 // Add the required-vector-width attribute. This contains the max width from:
498 // 1. min-vector-width attribute used in the source program.
499 // 2. Any builtins used that have a vector width specified.
500 // 3. Values passed in and out of inline assembly.
501 // 4. Width of vector arguments and return types for this function.
502 // 5. Width of vector aguments and return types for functions called by this
503 // function.
504 CurFn->addFnAttr("min-legal-vector-width", llvm::utostr(LargestVectorWidth));
505
506 // If we generated an unreachable return block, delete it now.
507 if (ReturnBlock.isValid() && ReturnBlock.getBlock()->use_empty()) {
508 Builder.ClearInsertionPoint();
509 ReturnBlock.getBlock()->eraseFromParent();
510 }
511 if (ReturnValue.isValid()) {
512 auto *RetAlloca = dyn_cast<llvm::AllocaInst>(ReturnValue.getPointer());
513 if (RetAlloca && RetAlloca->use_empty()) {
514 RetAlloca->eraseFromParent();
515 ReturnValue = Address::invalid();
516 }
517 }
518 }
519
520 /// ShouldInstrumentFunction - Return true if the current function should be
521 /// instrumented with __cyg_profile_func_* calls
522 bool CodeGenFunction::ShouldInstrumentFunction() {
523 if (!CGM.getCodeGenOpts().InstrumentFunctions &&
524 !CGM.getCodeGenOpts().InstrumentFunctionsAfterInlining &&
525 !CGM.getCodeGenOpts().InstrumentFunctionEntryBare)
526 return false;
527 if (!CurFuncDecl || CurFuncDecl->hasAttr<NoInstrumentFunctionAttr>())
528 return false;
529 return true;
530 }
531
532 /// ShouldXRayInstrument - Return true if the current function should be
533 /// instrumented with XRay nop sleds.
534 bool CodeGenFunction::ShouldXRayInstrumentFunction() const {
535 return CGM.getCodeGenOpts().XRayInstrumentFunctions;
536 }
537
538 /// AlwaysEmitXRayCustomEvents - Return true if we should emit IR for calls to
539 /// the __xray_customevent(...) builtin calls, when doing XRay instrumentation.
540 bool CodeGenFunction::AlwaysEmitXRayCustomEvents() const {
541 return CGM.getCodeGenOpts().XRayInstrumentFunctions &&
542 (CGM.getCodeGenOpts().XRayAlwaysEmitCustomEvents ||
543 CGM.getCodeGenOpts().XRayInstrumentationBundle.Mask ==
544 XRayInstrKind::Custom);
545 }
546
547 bool CodeGenFunction::AlwaysEmitXRayTypedEvents() const {
548 return CGM.getCodeGenOpts().XRayInstrumentFunctions &&
549 (CGM.getCodeGenOpts().XRayAlwaysEmitTypedEvents ||
550 CGM.getCodeGenOpts().XRayInstrumentationBundle.Mask ==
551 XRayInstrKind::Typed);
552 }
553
554 llvm::Constant *
555 CodeGenFunction::EncodeAddrForUseInPrologue(llvm::Function *F,
556 llvm::Constant *Addr) {
557 // Addresses stored in prologue data can't require run-time fixups and must
558 // be PC-relative. Run-time fixups are undesirable because they necessitate
559 // writable text segments, which are unsafe. And absolute addresses are
560 // undesirable because they break PIE mode.
561
562 // Add a layer of indirection through a private global. Taking its address
563 // won't result in a run-time fixup, even if Addr has linkonce_odr linkage.
564 auto *GV = new llvm::GlobalVariable(CGM.getModule(), Addr->getType(),
565 /*isConstant=*/true,
566 llvm::GlobalValue::PrivateLinkage, Addr);
567
568 // Create a PC-relative address.
569 auto *GOTAsInt = llvm::ConstantExpr::getPtrToInt(GV, IntPtrTy);
570 auto *FuncAsInt = llvm::ConstantExpr::getPtrToInt(F, IntPtrTy);
571 auto *PCRelAsInt = llvm::ConstantExpr::getSub(GOTAsInt, FuncAsInt);
572 return (IntPtrTy == Int32Ty)
573 ? PCRelAsInt
574 : llvm::ConstantExpr::getTrunc(PCRelAsInt, Int32Ty);
575 }
576
577 llvm::Value *
578 CodeGenFunction::DecodeAddrUsedInPrologue(llvm::Value *F,
579 llvm::Value *EncodedAddr) {
580 // Reconstruct the address of the global.
581 auto *PCRelAsInt = Builder.CreateSExt(EncodedAddr, IntPtrTy);
582 auto *FuncAsInt = Builder.CreatePtrToInt(F, IntPtrTy, "func_addr.int");
583 auto *GOTAsInt = Builder.CreateAdd(PCRelAsInt, FuncAsInt, "global_addr.int");
584 auto *GOTAddr = Builder.CreateIntToPtr(GOTAsInt, Int8PtrPtrTy, "global_addr");
585
586 // Load the original pointer through the global.
587 return Builder.CreateLoad(Address(GOTAddr, getPointerAlign()),
588 "decoded_addr");
589 }
590
591 void CodeGenFunction::EmitOpenCLKernelMetadata(const FunctionDecl *FD,
592 llvm::Function *Fn)
593 {
594 if (!FD->hasAttr<OpenCLKernelAttr>())
595 return;
596
597 llvm::LLVMContext &Context = getLLVMContext();
598
599 CGM.GenOpenCLArgMetadata(Fn, FD, this);
600
601 if (const VecTypeHintAttr *A = FD->getAttr<VecTypeHintAttr>()) {
602 QualType HintQTy = A->getTypeHint();
603 const ExtVectorType *HintEltQTy = HintQTy->getAs<ExtVectorType>();
604 bool IsSignedInteger =
605 HintQTy->isSignedIntegerType() ||
606 (HintEltQTy && HintEltQTy->getElementType()->isSignedIntegerType());
607 llvm::Metadata *AttrMDArgs[] = {
608 llvm::ConstantAsMetadata::get(llvm::UndefValue::get(
609 CGM.getTypes().ConvertType(A->getTypeHint()))),
610 llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
611 llvm::IntegerType::get(Context, 32),
612 llvm::APInt(32, (uint64_t)(IsSignedInteger ? 1 : 0))))};
613 Fn->setMetadata("vec_type_hint", llvm::MDNode::get(Context, AttrMDArgs));
614 }
615
616 if (const WorkGroupSizeHintAttr *A = FD->getAttr<WorkGroupSizeHintAttr>()) {
617 llvm::Metadata *AttrMDArgs[] = {
618 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())),
619 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())),
620 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))};
621 Fn->setMetadata("work_group_size_hint", llvm::MDNode::get(Context, AttrMDArgs));
622 }
623
624 if (const ReqdWorkGroupSizeAttr *A = FD->getAttr<ReqdWorkGroupSizeAttr>()) {
625 llvm::Metadata *AttrMDArgs[] = {
626 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())),
627 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())),
628 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))};
629 Fn->setMetadata("reqd_work_group_size", llvm::MDNode::get(Context, AttrMDArgs));
630 }
631
632 if (const OpenCLIntelReqdSubGroupSizeAttr *A =
633 FD->getAttr<OpenCLIntelReqdSubGroupSizeAttr>()) {
634 llvm::Metadata *AttrMDArgs[] = {
635 llvm::ConstantAsMetadata::get(Builder.getInt32(A->getSubGroupSize()))};
636 Fn->setMetadata("intel_reqd_sub_group_size",
637 llvm::MDNode::get(Context, AttrMDArgs));
638 }
639 }
640
641 /// Determine whether the function F ends with a return stmt.
642 static bool endsWithReturn(const Decl* F) {
643 const Stmt *Body = nullptr;
644 if (auto *FD = dyn_cast_or_null<FunctionDecl>(F))
645 Body = FD->getBody();
646 else if (auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(F))
647 Body = OMD->getBody();
648
649 if (auto *CS = dyn_cast_or_null<CompoundStmt>(Body)) {
650 auto LastStmt = CS->body_rbegin();
651 if (LastStmt != CS->body_rend())
652 return isa<ReturnStmt>(*LastStmt);
653 }
654 return false;
655 }
656
657 void CodeGenFunction::markAsIgnoreThreadCheckingAtRuntime(llvm::Function *Fn) {
658 if (SanOpts.has(SanitizerKind::Thread)) {
659 Fn->addFnAttr("sanitize_thread_no_checking_at_run_time");
660 Fn->removeFnAttr(llvm::Attribute::SanitizeThread);
661 }
662 }
663
664 /// Check if the return value of this function requires sanitization.
665 bool CodeGenFunction::requiresReturnValueCheck() const {
666 return requiresReturnValueNullabilityCheck() ||
667 (SanOpts.has(SanitizerKind::ReturnsNonnullAttribute) && CurCodeDecl &&
668 CurCodeDecl->getAttr<ReturnsNonNullAttr>());
669 }
670
671 static bool matchesStlAllocatorFn(const Decl *D, const ASTContext &Ctx) {
672 auto *MD = dyn_cast_or_null<CXXMethodDecl>(D);
673 if (!MD || !MD->getDeclName().getAsIdentifierInfo() ||
674 !MD->getDeclName().getAsIdentifierInfo()->isStr("allocate") ||
675 (MD->getNumParams() != 1 && MD->getNumParams() != 2))
676 return false;
677
678 if (MD->parameters()[0]->getType().getCanonicalType() != Ctx.getSizeType())
679 return false;
680
681 if (MD->getNumParams() == 2) {
682 auto *PT = MD->parameters()[1]->getType()->getAs<PointerType>();
683 if (!PT || !PT->isVoidPointerType() ||
684 !PT->getPointeeType().isConstQualified())
685 return false;
686 }
687
688 return true;
689 }
690
691 /// Return the UBSan prologue signature for \p FD if one is available.
692 static llvm::Constant *getPrologueSignature(CodeGenModule &CGM,
693 const FunctionDecl *FD) {
694 if (const auto *MD = dyn_cast<CXXMethodDecl>(FD))
695 if (!MD->isStatic())
696 return nullptr;
697 return CGM.getTargetCodeGenInfo().getUBSanFunctionSignature(CGM);
698 }
699
700 void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
701 llvm::Function *Fn,
702 const CGFunctionInfo &FnInfo,
703 const FunctionArgList &Args,
704 SourceLocation Loc,
705 SourceLocation StartLoc) {
706 assert(!CurFn &&
707 "Do not use a CodeGenFunction object for more than one function");
708
709 const Decl *D = GD.getDecl();
710
711 DidCallStackSave = false;
712 CurCodeDecl = D;
713 if (const auto *FD = dyn_cast_or_null<FunctionDecl>(D))
714 if (FD->usesSEHTry())
715 CurSEHParent = FD;
716 CurFuncDecl = (D ? D->getNonClosureContext() : nullptr);
717 FnRetTy = RetTy;
718 CurFn = Fn;
719 CurFnInfo = &FnInfo;
720 assert(CurFn->isDeclaration() && "Function already has body?");
721
722 // If this function has been blacklisted for any of the enabled sanitizers,
723 // disable the sanitizer for the function.
724 do {
725 #define SANITIZER(NAME, ID) \
726 if (SanOpts.empty()) \
727 break; \
728 if (SanOpts.has(SanitizerKind::ID)) \
729 if (CGM.isInSanitizerBlacklist(SanitizerKind::ID, Fn, Loc)) \
730 SanOpts.set(SanitizerKind::ID, false);
731
732 #include "clang/Basic/Sanitizers.def"
733 #undef SANITIZER
734 } while (0);
735
736 if (D) {
737 // Apply the no_sanitize* attributes to SanOpts.
738 for (auto Attr : D->specific_attrs<NoSanitizeAttr>()) {
739 SanitizerMask mask = Attr->getMask();
740 SanOpts.Mask &= ~mask;
741 if (mask & SanitizerKind::Address)
742 SanOpts.set(SanitizerKind::KernelAddress, false);
743 if (mask & SanitizerKind::KernelAddress)
744 SanOpts.set(SanitizerKind::Address, false);
745 if (mask & SanitizerKind::HWAddress)
746 SanOpts.set(SanitizerKind::KernelHWAddress, false);
747 if (mask & SanitizerKind::KernelHWAddress)
748 SanOpts.set(SanitizerKind::HWAddress, false);
749 }
750 }
751
752 // Apply sanitizer attributes to the function.
753 if (SanOpts.hasOneOf(SanitizerKind::Address | SanitizerKind::KernelAddress))
754 Fn->addFnAttr(llvm::Attribute::SanitizeAddress);
755 if (SanOpts.hasOneOf(SanitizerKind::HWAddress | SanitizerKind::KernelHWAddress))
756 Fn->addFnAttr(llvm::Attribute::SanitizeHWAddress);
757 if (SanOpts.has(SanitizerKind::MemTag))
758 Fn->addFnAttr(llvm::Attribute::SanitizeMemTag);
759 if (SanOpts.has(SanitizerKind::Thread))
760 Fn->addFnAttr(llvm::Attribute::SanitizeThread);
761 if (SanOpts.hasOneOf(SanitizerKind::Memory | SanitizerKind::KernelMemory))
762 Fn->addFnAttr(llvm::Attribute::SanitizeMemory);
763 if (SanOpts.has(SanitizerKind::SafeStack))
764 Fn->addFnAttr(llvm::Attribute::SafeStack);
765 if (SanOpts.has(SanitizerKind::ShadowCallStack))
766 Fn->addFnAttr(llvm::Attribute::ShadowCallStack);
767
768 // Apply fuzzing attribute to the function.
769 if (SanOpts.hasOneOf(SanitizerKind::Fuzzer | SanitizerKind::FuzzerNoLink))
770 Fn->addFnAttr(llvm::Attribute::OptForFuzzing);
771
772 // Ignore TSan memory acesses from within ObjC/ObjC++ dealloc, initialize,
773 // .cxx_destruct, __destroy_helper_block_ and all of their calees at run time.
774 if (SanOpts.has(SanitizerKind::Thread)) {
775 if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
776 IdentifierInfo *II = OMD->getSelector().getIdentifierInfoForSlot(0);
777 if (OMD->getMethodFamily() == OMF_dealloc ||
778 OMD->getMethodFamily() == OMF_initialize ||
779 (OMD->getSelector().isUnarySelector() && II->isStr(".cxx_destruct"))) {
780 markAsIgnoreThreadCheckingAtRuntime(Fn);
781 }
782 }
783 }
784
785 // Ignore unrelated casts in STL allocate() since the allocator must cast
786 // from void* to T* before object initialization completes. Don't match on the
787 // namespace because not all allocators are in std::
788 if (D && SanOpts.has(SanitizerKind::CFIUnrelatedCast)) {
789 if (matchesStlAllocatorFn(D, getContext()))
790 SanOpts.Mask &= ~SanitizerKind::CFIUnrelatedCast;
791 }
792
793 // Ignore null checks in coroutine functions since the coroutines passes
794 // are not aware of how to move the extra UBSan instructions across the split
795 // coroutine boundaries.
796 if (D && SanOpts.has(SanitizerKind::Null))
797 if (const auto *FD = dyn_cast<FunctionDecl>(D))
798 if (FD->getBody() &&
799 FD->getBody()->getStmtClass() == Stmt::CoroutineBodyStmtClass)
800 SanOpts.Mask &= ~SanitizerKind::Null;
801
802 if (D) {
803 // Apply xray attributes to the function (as a string, for now)
804 if (const auto *XRayAttr = D->getAttr<XRayInstrumentAttr>()) {
805 if (CGM.getCodeGenOpts().XRayInstrumentationBundle.has(
806 XRayInstrKind::Function)) {
807 if (XRayAttr->alwaysXRayInstrument() && ShouldXRayInstrumentFunction())
808 Fn->addFnAttr("function-instrument", "xray-always");
809 if (XRayAttr->neverXRayInstrument())
810 Fn->addFnAttr("function-instrument", "xray-never");
811 if (const auto *LogArgs = D->getAttr<XRayLogArgsAttr>())
812 if (ShouldXRayInstrumentFunction())
813 Fn->addFnAttr("xray-log-args",
814 llvm::utostr(LogArgs->getArgumentCount()));
815 }
816 } else {
817 if (ShouldXRayInstrumentFunction() && !CGM.imbueXRayAttrs(Fn, Loc))
818 Fn->addFnAttr(
819 "xray-instruction-threshold",
820 llvm::itostr(CGM.getCodeGenOpts().XRayInstructionThreshold));
821 }
822
823 unsigned Count, Offset;
824 if (const auto *Attr = D->getAttr<PatchableFunctionEntryAttr>()) {
825 Count = Attr->getCount();
826 Offset = Attr->getOffset();
827 } else {
828 Count = CGM.getCodeGenOpts().PatchableFunctionEntryCount;
829 Offset = CGM.getCodeGenOpts().PatchableFunctionEntryOffset;
830 }
831 if (Count && Offset <= Count) {
832 Fn->addFnAttr("patchable-function-entry", std::to_string(Count - Offset));
833 if (Offset)
834 Fn->addFnAttr("patchable-function-prefix", std::to_string(Offset));
835 }
836 }
837
838 // Add no-jump-tables value.
839 Fn->addFnAttr("no-jump-tables",
840 llvm::toStringRef(CGM.getCodeGenOpts().NoUseJumpTables));
841
842 // Add no-inline-line-tables value.
843 if (CGM.getCodeGenOpts().NoInlineLineTables)
844 Fn->addFnAttr("no-inline-line-tables");
845
846 // Add profile-sample-accurate value.
847 if (CGM.getCodeGenOpts().ProfileSampleAccurate)
848 Fn->addFnAttr("profile-sample-accurate");
849
850 if (D && D->hasAttr<CFICanonicalJumpTableAttr>())
851 Fn->addFnAttr("cfi-canonical-jump-table");
852
853 if (getLangOpts().OpenCL) {
854 // Add metadata for a kernel function.
855 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
856 EmitOpenCLKernelMetadata(FD, Fn);
857 }
858
859 // If we are checking function types, emit a function type signature as
860 // prologue data.
861 if (getLangOpts().CPlusPlus && SanOpts.has(SanitizerKind::Function)) {
862 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
863 if (llvm::Constant *PrologueSig = getPrologueSignature(CGM, FD)) {
864 // Remove any (C++17) exception specifications, to allow calling e.g. a
865 // noexcept function through a non-noexcept pointer.
866 auto ProtoTy =
867 getContext().getFunctionTypeWithExceptionSpec(FD->getType(),
868 EST_None);
869 llvm::Constant *FTRTTIConst =
870 CGM.GetAddrOfRTTIDescriptor(ProtoTy, /*ForEH=*/true);
871 llvm::Constant *FTRTTIConstEncoded =
872 EncodeAddrForUseInPrologue(Fn, FTRTTIConst);
873 llvm::Constant *PrologueStructElems[] = {PrologueSig,
874 FTRTTIConstEncoded};
875 llvm::Constant *PrologueStructConst =
876 llvm::ConstantStruct::getAnon(PrologueStructElems, /*Packed=*/true);
877 Fn->setPrologueData(PrologueStructConst);
878 }
879 }
880 }
881
882 // If we're checking nullability, we need to know whether we can check the
883 // return value. Initialize the flag to 'true' and refine it in EmitParmDecl.
884 if (SanOpts.has(SanitizerKind::NullabilityReturn)) {
885 auto Nullability = FnRetTy->getNullability(getContext());
886 if (Nullability && *Nullability == NullabilityKind::NonNull) {
887 if (!(SanOpts.has(SanitizerKind::ReturnsNonnullAttribute) &&
888 CurCodeDecl && CurCodeDecl->getAttr<ReturnsNonNullAttr>()))
889 RetValNullabilityPrecondition =
890 llvm::ConstantInt::getTrue(getLLVMContext());
891 }
892 }
893
894 // If we're in C++ mode and the function name is "main", it is guaranteed
895 // to be norecurse by the standard (3.6.1.3 "The function main shall not be
896 // used within a program").
897 if (getLangOpts().CPlusPlus)
898 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
899 if (FD->isMain())
900 Fn->addFnAttr(llvm::Attribute::NoRecurse);
901
902 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
903 if (FD->usesFPIntrin())
904 Fn->addFnAttr(llvm::Attribute::StrictFP);
905
906 // If a custom alignment is used, force realigning to this alignment on
907 // any main function which certainly will need it.
908 if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
909 if ((FD->isMain() || FD->isMSVCRTEntryPoint()) &&
910 CGM.getCodeGenOpts().StackAlignment)
911 Fn->addFnAttr("stackrealign");
912
913 llvm::BasicBlock *EntryBB = createBasicBlock("entry", CurFn);
914
915 // Create a marker to make it easy to insert allocas into the entryblock
916 // later. Don't create this with the builder, because we don't want it
917 // folded.
918 llvm::Value *Undef = llvm::UndefValue::get(Int32Ty);
919 AllocaInsertPt = new llvm::BitCastInst(Undef, Int32Ty, "allocapt", EntryBB);
920
921 ReturnBlock = getJumpDestInCurrentScope("return");
922
923 Builder.SetInsertPoint(EntryBB);
924
925 // If we're checking the return value, allocate space for a pointer to a
926 // precise source location of the checked return statement.
927 if (requiresReturnValueCheck()) {
928 ReturnLocation = CreateDefaultAlignTempAlloca(Int8PtrTy, "return.sloc.ptr");
929 InitTempAlloca(ReturnLocation, llvm::ConstantPointerNull::get(Int8PtrTy));
930 }
931
932 // Emit subprogram debug descriptor.
933 if (CGDebugInfo *DI = getDebugInfo()) {
934 // Reconstruct the type from the argument list so that implicit parameters,
935 // such as 'this' and 'vtt', show up in the debug info. Preserve the calling
936 // convention.
937 CallingConv CC = CallingConv::CC_C;
938 if (auto *FD = dyn_cast_or_null<FunctionDecl>(D))
939 if (const auto *SrcFnTy = FD->getType()->getAs<FunctionType>())
940 CC = SrcFnTy->getCallConv();
941 SmallVector<QualType, 16> ArgTypes;
942 for (const VarDecl *VD : Args)
943 ArgTypes.push_back(VD->getType());
944 QualType FnType = getContext().getFunctionType(
945 RetTy, ArgTypes, FunctionProtoType::ExtProtoInfo(CC));
946 DI->EmitFunctionStart(GD, Loc, StartLoc, FnType, CurFn, CurFuncIsThunk,
947 Builder);
948 }
949
950 if (ShouldInstrumentFunction()) {
951 if (CGM.getCodeGenOpts().InstrumentFunctions)
952 CurFn->addFnAttr("instrument-function-entry", "__cyg_profile_func_enter");
953 if (CGM.getCodeGenOpts().InstrumentFunctionsAfterInlining)
954 CurFn->addFnAttr("instrument-function-entry-inlined",
955 "__cyg_profile_func_enter");
956 if (CGM.getCodeGenOpts().InstrumentFunctionEntryBare)
957 CurFn->addFnAttr("instrument-function-entry-inlined",
958 "__cyg_profile_func_enter_bare");
959 }
960
961 // Since emitting the mcount call here impacts optimizations such as function
962 // inlining, we just add an attribute to insert a mcount call in backend.
963 // The attribute "counting-function" is set to mcount function name which is
964 // architecture dependent.
965 if (CGM.getCodeGenOpts().InstrumentForProfiling) {
966 // Calls to fentry/mcount should not be generated if function has
967 // the no_instrument_function attribute.
968 if (!CurFuncDecl || !CurFuncDecl->hasAttr<NoInstrumentFunctionAttr>()) {
969 if (CGM.getCodeGenOpts().CallFEntry)
970 Fn->addFnAttr("fentry-call", "true");
971 else {
972 Fn->addFnAttr("instrument-function-entry-inlined",
973 getTarget().getMCountName());
974 }
975 if (CGM.getCodeGenOpts().MNopMCount) {
976 if (!CGM.getCodeGenOpts().CallFEntry)
977 CGM.getDiags().Report(diag::err_opt_not_valid_without_opt)
978 << "-mnop-mcount" << "-mfentry";
979 Fn->addFnAttr("mnop-mcount");
980 }
981
982 if (CGM.getCodeGenOpts().RecordMCount) {
983 if (!CGM.getCodeGenOpts().CallFEntry)
984 CGM.getDiags().Report(diag::err_opt_not_valid_without_opt)
985 << "-mrecord-mcount" << "-mfentry";
986 Fn->addFnAttr("mrecord-mcount");
987 }
988 }
989 }
990
991 if (CGM.getCodeGenOpts().PackedStack) {
992 if (getContext().getTargetInfo().getTriple().getArch() !=
993 llvm::Triple::systemz)
994 CGM.getDiags().Report(diag::err_opt_not_valid_on_target)
995 << "-mpacked-stack";
996 Fn->addFnAttr("packed-stack");
997 }
998
999 if (RetTy->isVoidType()) {
1000 // Void type; nothing to return.
1001 ReturnValue = Address::invalid();
1002
1003 // Count the implicit return.
1004 if (!endsWithReturn(D))
1005 ++NumReturnExprs;
1006 } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect) {
1007 // Indirect return; emit returned value directly into sret slot.
1008 // This reduces code size, and affects correctness in C++.
1009 auto AI = CurFn->arg_begin();
1010 if (CurFnInfo->getReturnInfo().isSRetAfterThis())
1011 ++AI;
1012 ReturnValue = Address(&*AI, CurFnInfo->getReturnInfo().getIndirectAlign());
1013 if (!CurFnInfo->getReturnInfo().getIndirectByVal()) {
1014 ReturnValuePointer =
1015 CreateDefaultAlignTempAlloca(Int8PtrTy, "result.ptr");
1016 Builder.CreateStore(Builder.CreatePointerBitCastOrAddrSpaceCast(
1017 ReturnValue.getPointer(), Int8PtrTy),
1018 ReturnValuePointer);
1019 }
1020 } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::InAlloca &&
1021 !hasScalarEvaluationKind(CurFnInfo->getReturnType())) {
1022 // Load the sret pointer from the argument struct and return into that.
1023 unsigned Idx = CurFnInfo->getReturnInfo().getInAllocaFieldIndex();
1024 llvm::Function::arg_iterator EI = CurFn->arg_end();
1025 --EI;
1026 llvm::Value *Addr = Builder.CreateStructGEP(nullptr, &*EI, Idx);
1027 ReturnValuePointer = Address(Addr, getPointerAlign());
1028 Addr = Builder.CreateAlignedLoad(Addr, getPointerAlign(), "agg.result");
1029 ReturnValue = Address(Addr, getNaturalTypeAlignment(RetTy));
1030 } else {
1031 ReturnValue = CreateIRTemp(RetTy, "retval");
1032
1033 // Tell the epilog emitter to autorelease the result. We do this
1034 // now so that various specialized functions can suppress it
1035 // during their IR-generation.
1036 if (getLangOpts().ObjCAutoRefCount &&
1037 !CurFnInfo->isReturnsRetained() &&
1038 RetTy->isObjCRetainableType())
1039 AutoreleaseResult = true;
1040 }
1041
1042 EmitStartEHSpec(CurCodeDecl);
1043
1044 PrologueCleanupDepth = EHStack.stable_begin();
1045
1046 // Emit OpenMP specific initialization of the device functions.
1047 if (getLangOpts().OpenMP && CurCodeDecl)
1048 CGM.getOpenMPRuntime().emitFunctionProlog(*this, CurCodeDecl);
1049
1050 EmitFunctionProlog(*CurFnInfo, CurFn, Args);
1051
1052 if (D && isa<CXXMethodDecl>(D) && cast<CXXMethodDecl>(D)->isInstance()) {
1053 CGM.getCXXABI().EmitInstanceFunctionProlog(*this);
1054 const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
1055 if (MD->getParent()->isLambda() &&
1056 MD->getOverloadedOperator() == OO_Call) {
1057 // We're in a lambda; figure out the captures.
1058 MD->getParent()->getCaptureFields(LambdaCaptureFields,
1059 LambdaThisCaptureField);
1060 if (LambdaThisCaptureField) {
1061 // If the lambda captures the object referred to by '*this' - either by
1062 // value or by reference, make sure CXXThisValue points to the correct
1063 // object.
1064
1065 // Get the lvalue for the field (which is a copy of the enclosing object
1066 // or contains the address of the enclosing object).
1067 LValue ThisFieldLValue = EmitLValueForLambdaField(LambdaThisCaptureField);
1068 if (!LambdaThisCaptureField->getType()->isPointerType()) {
1069 // If the enclosing object was captured by value, just use its address.
1070 CXXThisValue = ThisFieldLValue.getAddress(*this).getPointer();
1071 } else {
1072 // Load the lvalue pointed to by the field, since '*this' was captured
1073 // by reference.
1074 CXXThisValue =
1075 EmitLoadOfLValue(ThisFieldLValue, SourceLocation()).getScalarVal();
1076 }
1077 }
1078 for (auto *FD : MD->getParent()->fields()) {
1079 if (FD->hasCapturedVLAType()) {
1080 auto *ExprArg = EmitLoadOfLValue(EmitLValueForLambdaField(FD),
1081 SourceLocation()).getScalarVal();
1082 auto VAT = FD->getCapturedVLAType();
1083 VLASizeMap[VAT->getSizeExpr()] = ExprArg;
1084 }
1085 }
1086 } else {
1087 // Not in a lambda; just use 'this' from the method.
1088 // FIXME: Should we generate a new load for each use of 'this'? The
1089 // fast register allocator would be happier...
1090 CXXThisValue = CXXABIThisValue;
1091 }
1092
1093 // Check the 'this' pointer once per function, if it's available.
1094 if (CXXABIThisValue) {
1095 SanitizerSet SkippedChecks;
1096 SkippedChecks.set(SanitizerKind::ObjectSize, true);
1097 QualType ThisTy = MD->getThisType();
1098
1099 // If this is the call operator of a lambda with no capture-default, it
1100 // may have a static invoker function, which may call this operator with
1101 // a null 'this' pointer.
1102 if (isLambdaCallOperator(MD) &&
1103 MD->getParent()->getLambdaCaptureDefault() == LCD_None)
1104 SkippedChecks.set(SanitizerKind::Null, true);
1105
1106 EmitTypeCheck(isa<CXXConstructorDecl>(MD) ? TCK_ConstructorCall
1107 : TCK_MemberCall,
1108 Loc, CXXABIThisValue, ThisTy,
1109 getContext().getTypeAlignInChars(ThisTy->getPointeeType()),
1110 SkippedChecks);
1111 }
1112 }
1113
1114 // If any of the arguments have a variably modified type, make sure to
1115 // emit the type size.
1116 for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end();
1117 i != e; ++i) {
1118 const VarDecl *VD = *i;
1119
1120 // Dig out the type as written from ParmVarDecls; it's unclear whether
1121 // the standard (C99 6.9.1p10) requires this, but we're following the
1122 // precedent set by gcc.
1123 QualType Ty;
1124 if (const ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(VD))
1125 Ty = PVD->getOriginalType();
1126 else
1127 Ty = VD->getType();
1128
1129 if (Ty->isVariablyModifiedType())
1130 EmitVariablyModifiedType(Ty);
1131 }
1132 // Emit a location at the end of the prologue.
1133 if (CGDebugInfo *DI = getDebugInfo())
1134 DI->EmitLocation(Builder, StartLoc);
1135
1136 // TODO: Do we need to handle this in two places like we do with
1137 // target-features/target-cpu?
1138 if (CurFuncDecl)
1139 if (const auto *VecWidth = CurFuncDecl->getAttr<MinVectorWidthAttr>())
1140 LargestVectorWidth = VecWidth->getVectorWidth();
1141 }
1142
1143 void CodeGenFunction::EmitFunctionBody(const Stmt *Body) {
1144 incrementProfileCounter(Body);
1145 if (const CompoundStmt *S = dyn_cast<CompoundStmt>(Body))
1146 EmitCompoundStmtWithoutScope(*S);
1147 else
1148 EmitStmt(Body);
1149 }
1150
1151 /// When instrumenting to collect profile data, the counts for some blocks
1152 /// such as switch cases need to not include the fall-through counts, so
1153 /// emit a branch around the instrumentation code. When not instrumenting,
1154 /// this just calls EmitBlock().
1155 void CodeGenFunction::EmitBlockWithFallThrough(llvm::BasicBlock *BB,
1156 const Stmt *S) {
1157 llvm::BasicBlock *SkipCountBB = nullptr;
1158 if (HaveInsertPoint() && CGM.getCodeGenOpts().hasProfileClangInstr()) {
1159 // When instrumenting for profiling, the fallthrough to certain
1160 // statements needs to skip over the instrumentation code so that we
1161 // get an accurate count.
1162 SkipCountBB = createBasicBlock("skipcount");
1163 EmitBranch(SkipCountBB);
1164 }
1165 EmitBlock(BB);
1166 uint64_t CurrentCount = getCurrentProfileCount();
1167 incrementProfileCounter(S);
1168 setCurrentProfileCount(getCurrentProfileCount() + CurrentCount);
1169 if (SkipCountBB)
1170 EmitBlock(SkipCountBB);
1171 }
1172
1173 /// Tries to mark the given function nounwind based on the
1174 /// non-existence of any throwing calls within it. We believe this is
1175 /// lightweight enough to do at -O0.
1176 static void TryMarkNoThrow(llvm::Function *F) {
1177 // LLVM treats 'nounwind' on a function as part of the type, so we
1178 // can't do this on functions that can be overwritten.
1179 if (F->isInterposable()) return;
1180
1181 for (llvm::BasicBlock &BB : *F)
1182 for (llvm::Instruction &I : BB)
1183 if (I.mayThrow())
1184 return;
1185
1186 F->setDoesNotThrow();
1187 }
1188
1189 QualType CodeGenFunction::BuildFunctionArgList(GlobalDecl GD,
1190 FunctionArgList &Args) {
1191 const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl());
1192 QualType ResTy = FD->getReturnType();
1193
1194 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1195 if (MD && MD->isInstance()) {
1196 if (CGM.getCXXABI().HasThisReturn(GD))
1197 ResTy = MD->getThisType();
1198 else if (CGM.getCXXABI().hasMostDerivedReturn(GD))
1199 ResTy = CGM.getContext().VoidPtrTy;
1200 CGM.getCXXABI().buildThisParam(*this, Args);
1201 }
1202
1203 // The base version of an inheriting constructor whose constructed base is a
1204 // virtual base is not passed any arguments (because it doesn't actually call
1205 // the inherited constructor).
1206 bool PassedParams = true;
1207 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD))
1208 if (auto Inherited = CD->getInheritedConstructor())
1209 PassedParams =
1210 getTypes().inheritingCtorHasParams(Inherited, GD.getCtorType());
1211
1212 if (PassedParams) {
1213 for (auto *Param : FD->parameters()) {
1214 Args.push_back(Param);
1215 if (!Param->hasAttr<PassObjectSizeAttr>())
1216 continue;
1217
1218 auto *Implicit = ImplicitParamDecl::Create(
1219 getContext(), Param->getDeclContext(), Param->getLocation(),
1220 /*Id=*/nullptr, getContext().getSizeType(), ImplicitParamDecl::Other);
1221 SizeArguments[Param] = Implicit;
1222 Args.push_back(Implicit);
1223 }
1224 }
1225
1226 if (MD && (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)))
1227 CGM.getCXXABI().addImplicitStructorParams(*this, ResTy, Args);
1228
1229 return ResTy;
1230 }
1231
1232 static bool
1233 shouldUseUndefinedBehaviorReturnOptimization(const FunctionDecl *FD,
1234 const ASTContext &Context) {
1235 QualType T = FD->getReturnType();
1236 // Avoid the optimization for functions that return a record type with a
1237 // trivial destructor or another trivially copyable type.
1238 if (const RecordType *RT = T.getCanonicalType()->getAs<RecordType>()) {
1239 if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl()))
1240 return !ClassDecl->hasTrivialDestructor();
1241 }
1242 return !T.isTriviallyCopyableType(Context);
1243 }
1244
1245 void CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn,
1246 const CGFunctionInfo &FnInfo) {
1247 const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl());
1248 CurGD = GD;
1249
1250 FunctionArgList Args;
1251 QualType ResTy = BuildFunctionArgList(GD, Args);
1252
1253 // Check if we should generate debug info for this function.
1254 if (FD->hasAttr<NoDebugAttr>())
1255 DebugInfo = nullptr; // disable debug info indefinitely for this function
1256
1257 // The function might not have a body if we're generating thunks for a
1258 // function declaration.
1259 SourceRange BodyRange;
1260 if (Stmt *Body = FD->getBody())
1261 BodyRange = Body->getSourceRange();
1262 else
1263 BodyRange = FD->getLocation();
1264 CurEHLocation = BodyRange.getEnd();
1265
1266 // Use the location of the start of the function to determine where
1267 // the function definition is located. By default use the location
1268 // of the declaration as the location for the subprogram. A function
1269 // may lack a declaration in the source code if it is created by code
1270 // gen. (examples: _GLOBAL__I_a, __cxx_global_array_dtor, thunk).
1271 SourceLocation Loc = FD->getLocation();
1272
1273 // If this is a function specialization then use the pattern body
1274 // as the location for the function.
1275 if (const FunctionDecl *SpecDecl = FD->getTemplateInstantiationPattern())
1276 if (SpecDecl->hasBody(SpecDecl))
1277 Loc = SpecDecl->getLocation();
1278
1279 Stmt *Body = FD->getBody();
1280
1281 // Initialize helper which will detect jumps which can cause invalid lifetime
1282 // markers.
1283 if (Body && ShouldEmitLifetimeMarkers)
1284 Bypasses.Init(Body);
1285
1286 // Emit the standard function prologue.
1287 StartFunction(GD, ResTy, Fn, FnInfo, Args, Loc, BodyRange.getBegin());
1288
1289 // Generate the body of the function.
1290 PGO.assignRegionCounters(GD, CurFn);
1291 if (isa<CXXDestructorDecl>(FD))
1292 EmitDestructorBody(Args);
1293 else if (isa<CXXConstructorDecl>(FD))
1294 EmitConstructorBody(Args);
1295 else if (getLangOpts().CUDA &&
1296 !getLangOpts().CUDAIsDevice &&
1297 FD->hasAttr<CUDAGlobalAttr>())
1298 CGM.getCUDARuntime().emitDeviceStub(*this, Args);
1299 else if (isa<CXXMethodDecl>(FD) &&
1300 cast<CXXMethodDecl>(FD)->isLambdaStaticInvoker()) {
1301 // The lambda static invoker function is special, because it forwards or
1302 // clones the body of the function call operator (but is actually static).
1303 EmitLambdaStaticInvokeBody(cast<CXXMethodDecl>(FD));
1304 } else if (FD->isDefaulted() && isa<CXXMethodDecl>(FD) &&
1305 (cast<CXXMethodDecl>(FD)->isCopyAssignmentOperator() ||
1306 cast<CXXMethodDecl>(FD)->isMoveAssignmentOperator())) {
1307 // Implicit copy-assignment gets the same special treatment as implicit
1308 // copy-constructors.
1309 emitImplicitAssignmentOperatorBody(Args);
1310 } else if (Body) {
1311 EmitFunctionBody(Body);
1312 } else
1313 llvm_unreachable("no definition for emitted function");
1314
1315 // C++11 [stmt.return]p2:
1316 // Flowing off the end of a function [...] results in undefined behavior in
1317 // a value-returning function.
1318 // C11 6.9.1p12:
1319 // If the '}' that terminates a function is reached, and the value of the
1320 // function call is used by the caller, the behavior is undefined.
1321 if (getLangOpts().CPlusPlus && !FD->hasImplicitReturnZero() && !SawAsmBlock &&
1322 !FD->getReturnType()->isVoidType() && Builder.GetInsertBlock()) {
1323 bool ShouldEmitUnreachable =
1324 CGM.getCodeGenOpts().StrictReturn ||
1325 shouldUseUndefinedBehaviorReturnOptimization(FD, getContext());
1326 if (SanOpts.has(SanitizerKind::Return)) {
1327 SanitizerScope SanScope(this);
1328 llvm::Value *IsFalse = Builder.getFalse();
1329 EmitCheck(std::make_pair(IsFalse, SanitizerKind::Return),
1330 SanitizerHandler::MissingReturn,
1331 EmitCheckSourceLocation(FD->getLocation()), None);
1332 } else if (ShouldEmitUnreachable) {
1333 if (CGM.getCodeGenOpts().OptimizationLevel == 0)
1334 EmitTrapCall(llvm::Intrinsic::trap);
1335 }
1336 if (SanOpts.has(SanitizerKind::Return) || ShouldEmitUnreachable) {
1337 Builder.CreateUnreachable();
1338 Builder.ClearInsertionPoint();
1339 }
1340 }
1341
1342 // Emit the standard function epilogue.
1343 FinishFunction(BodyRange.getEnd());
1344
1345 // If we haven't marked the function nothrow through other means, do
1346 // a quick pass now to see if we can.
1347 if (!CurFn->doesNotThrow())
1348 TryMarkNoThrow(CurFn);
1349 }
1350
1351 /// ContainsLabel - Return true if the statement contains a label in it. If
1352 /// this statement is not executed normally, it not containing a label means
1353 /// that we can just remove the code.
1354 bool CodeGenFunction::ContainsLabel(const Stmt *S, bool IgnoreCaseStmts) {
1355 // Null statement, not a label!
1356 if (!S) return false;
1357
1358 // If this is a label, we have to emit the code, consider something like:
1359 // if (0) { ... foo: bar(); } goto foo;
1360 //
1361 // TODO: If anyone cared, we could track __label__'s, since we know that you
1362 // can't jump to one from outside their declared region.
1363 if (isa<LabelStmt>(S))
1364 return true;
1365
1366 // If this is a case/default statement, and we haven't seen a switch, we have
1367 // to emit the code.
1368 if (isa<SwitchCase>(S) && !IgnoreCaseStmts)
1369 return true;
1370
1371 // If this is a switch statement, we want to ignore cases below it.
1372 if (isa<SwitchStmt>(S))
1373 IgnoreCaseStmts = true;
1374
1375 // Scan subexpressions for verboten labels.
1376 for (const Stmt *SubStmt : S->children())
1377 if (ContainsLabel(SubStmt, IgnoreCaseStmts))
1378 return true;
1379
1380 return false;
1381 }
1382
1383 /// containsBreak - Return true if the statement contains a break out of it.
1384 /// If the statement (recursively) contains a switch or loop with a break
1385 /// inside of it, this is fine.
1386 bool CodeGenFunction::containsBreak(const Stmt *S) {
1387 // Null statement, not a label!
1388 if (!S) return false;
1389
1390 // If this is a switch or loop that defines its own break scope, then we can
1391 // include it and anything inside of it.
1392 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) || isa<DoStmt>(S) ||
1393 isa<ForStmt>(S))
1394 return false;
1395
1396 if (isa<BreakStmt>(S))
1397 return true;
1398
1399 // Scan subexpressions for verboten breaks.
1400 for (const Stmt *SubStmt : S->children())
1401 if (containsBreak(SubStmt))
1402 return true;
1403
1404 return false;
1405 }
1406
1407 bool CodeGenFunction::mightAddDeclToScope(const Stmt *S) {
1408 if (!S) return false;
1409
1410 // Some statement kinds add a scope and thus never add a decl to the current
1411 // scope. Note, this list is longer than the list of statements that might
1412 // have an unscoped decl nested within them, but this way is conservatively
1413 // correct even if more statement kinds are added.
1414 if (isa<IfStmt>(S) || isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
1415 isa<DoStmt>(S) || isa<ForStmt>(S) || isa<CompoundStmt>(S) ||
1416 isa<CXXForRangeStmt>(S) || isa<CXXTryStmt>(S) ||
1417 isa<ObjCForCollectionStmt>(S) || isa<ObjCAtTryStmt>(S))
1418 return false;
1419
1420 if (isa<DeclStmt>(S))
1421 return true;
1422
1423 for (const Stmt *SubStmt : S->children())
1424 if (mightAddDeclToScope(SubStmt))
1425 return true;
1426
1427 return false;
1428 }
1429
1430 /// ConstantFoldsToSimpleInteger - If the specified expression does not fold
1431 /// to a constant, or if it does but contains a label, return false. If it
1432 /// constant folds return true and set the boolean result in Result.
1433 bool CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond,
1434 bool &ResultBool,
1435 bool AllowLabels) {
1436 llvm::APSInt ResultInt;
1437 if (!ConstantFoldsToSimpleInteger(Cond, ResultInt, AllowLabels))
1438 return false;
1439
1440 ResultBool = ResultInt.getBoolValue();
1441 return true;
1442 }
1443
1444 /// ConstantFoldsToSimpleInteger - If the specified expression does not fold
1445 /// to a constant, or if it does but contains a label, return false. If it
1446 /// constant folds return true and set the folded value.
1447 bool CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond,
1448 llvm::APSInt &ResultInt,
1449 bool AllowLabels) {
1450 // FIXME: Rename and handle conversion of other evaluatable things
1451 // to bool.
1452 Expr::EvalResult Result;
1453 if (!Cond->EvaluateAsInt(Result, getContext()))
1454 return false; // Not foldable, not integer or not fully evaluatable.
1455
1456 llvm::APSInt Int = Result.Val.getInt();
1457 if (!AllowLabels && CodeGenFunction::ContainsLabel(Cond))
1458 return false; // Contains a label.
1459
1460 ResultInt = Int;
1461 return true;
1462 }
1463
1464
1465
1466 /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an if
1467 /// statement) to the specified blocks. Based on the condition, this might try
1468 /// to simplify the codegen of the conditional based on the branch.
1469 ///
1470 void CodeGenFunction::EmitBranchOnBoolExpr(const Expr *Cond,
1471 llvm::BasicBlock *TrueBlock,
1472 llvm::BasicBlock *FalseBlock,
1473 uint64_t TrueCount) {
1474 Cond = Cond->IgnoreParens();
1475
1476 if (const BinaryOperator *CondBOp = dyn_cast<BinaryOperator>(Cond)) {
1477
1478 // Handle X && Y in a condition.
1479 if (CondBOp->getOpcode() == BO_LAnd) {
1480 // If we have "1 && X", simplify the code. "0 && X" would have constant
1481 // folded if the case was simple enough.
1482 bool ConstantBool = false;
1483 if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) &&
1484 ConstantBool) {
1485 // br(1 && X) -> br(X).
1486 incrementProfileCounter(CondBOp);
1487 return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock,
1488 TrueCount);
1489 }
1490
1491 // If we have "X && 1", simplify the code to use an uncond branch.
1492 // "X && 0" would have been constant folded to 0.
1493 if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) &&
1494 ConstantBool) {
1495 // br(X && 1) -> br(X).
1496 return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock,
1497 TrueCount);
1498 }
1499
1500 // Emit the LHS as a conditional. If the LHS conditional is false, we
1501 // want to jump to the FalseBlock.
1502 llvm::BasicBlock *LHSTrue = createBasicBlock("land.lhs.true");
1503 // The counter tells us how often we evaluate RHS, and all of TrueCount
1504 // can be propagated to that branch.
1505 uint64_t RHSCount = getProfileCount(CondBOp->getRHS());
1506
1507 ConditionalEvaluation eval(*this);
1508 {
1509 ApplyDebugLocation DL(*this, Cond);
1510 EmitBranchOnBoolExpr(CondBOp->getLHS(), LHSTrue, FalseBlock, RHSCount);
1511 EmitBlock(LHSTrue);
1512 }
1513
1514 incrementProfileCounter(CondBOp);
1515 setCurrentProfileCount(getProfileCount(CondBOp->getRHS()));
1516
1517 // Any temporaries created here are conditional.
1518 eval.begin(*this);
1519 EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, TrueCount);
1520 eval.end(*this);
1521
1522 return;
1523 }
1524
1525 if (CondBOp->getOpcode() == BO_LOr) {
1526 // If we have "0 || X", simplify the code. "1 || X" would have constant
1527 // folded if the case was simple enough.
1528 bool ConstantBool = false;
1529 if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) &&
1530 !ConstantBool) {
1531 // br(0 || X) -> br(X).
1532 incrementProfileCounter(CondBOp);
1533 return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock,
1534 TrueCount);
1535 }
1536
1537 // If we have "X || 0", simplify the code to use an uncond branch.
1538 // "X || 1" would have been constant folded to 1.
1539 if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) &&
1540 !ConstantBool) {
1541 // br(X || 0) -> br(X).
1542 return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock,
1543 TrueCount);
1544 }
1545
1546 // Emit the LHS as a conditional. If the LHS conditional is true, we
1547 // want to jump to the TrueBlock.
1548 llvm::BasicBlock *LHSFalse = createBasicBlock("lor.lhs.false");
1549 // We have the count for entry to the RHS and for the whole expression
1550 // being true, so we can divy up True count between the short circuit and
1551 // the RHS.
1552 uint64_t LHSCount =
1553 getCurrentProfileCount() - getProfileCount(CondBOp->getRHS());
1554 uint64_t RHSCount = TrueCount - LHSCount;
1555
1556 ConditionalEvaluation eval(*this);
1557 {
1558 ApplyDebugLocation DL(*this, Cond);
1559 EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, LHSFalse, LHSCount);
1560 EmitBlock(LHSFalse);
1561 }
1562
1563 incrementProfileCounter(CondBOp);
1564 setCurrentProfileCount(getProfileCount(CondBOp->getRHS()));
1565
1566 // Any temporaries created here are conditional.
1567 eval.begin(*this);
1568 EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, RHSCount);
1569
1570 eval.end(*this);
1571
1572 return;
1573 }
1574 }
1575
1576 if (const UnaryOperator *CondUOp = dyn_cast<UnaryOperator>(Cond)) {
1577 // br(!x, t, f) -> br(x, f, t)
1578 if (CondUOp->getOpcode() == UO_LNot) {
1579 // Negate the count.
1580 uint64_t FalseCount = getCurrentProfileCount() - TrueCount;
1581 // Negate the condition and swap the destination blocks.
1582 return EmitBranchOnBoolExpr(CondUOp->getSubExpr(), FalseBlock, TrueBlock,
1583 FalseCount);
1584 }
1585 }
1586
1587 if (const ConditionalOperator *CondOp = dyn_cast<ConditionalOperator>(Cond)) {
1588 // br(c ? x : y, t, f) -> br(c, br(x, t, f), br(y, t, f))
1589 llvm::BasicBlock *LHSBlock = createBasicBlock("cond.true");
1590 llvm::BasicBlock *RHSBlock = createBasicBlock("cond.false");
1591
1592 ConditionalEvaluation cond(*this);
1593 EmitBranchOnBoolExpr(CondOp->getCond(), LHSBlock, RHSBlock,
1594 getProfileCount(CondOp));
1595
1596 // When computing PGO branch weights, we only know the overall count for
1597 // the true block. This code is essentially doing tail duplication of the
1598 // naive code-gen, introducing new edges for which counts are not
1599 // available. Divide the counts proportionally between the LHS and RHS of
1600 // the conditional operator.
1601 uint64_t LHSScaledTrueCount = 0;
1602 if (TrueCount) {
1603 double LHSRatio =
1604 getProfileCount(CondOp) / (double)getCurrentProfileCount();
1605 LHSScaledTrueCount = TrueCount * LHSRatio;
1606 }
1607
1608 cond.begin(*this);
1609 EmitBlock(LHSBlock);
1610 incrementProfileCounter(CondOp);
1611 {
1612 ApplyDebugLocation DL(*this, Cond);
1613 EmitBranchOnBoolExpr(CondOp->getLHS(), TrueBlock, FalseBlock,
1614 LHSScaledTrueCount);
1615 }
1616 cond.end(*this);
1617
1618 cond.begin(*this);
1619 EmitBlock(RHSBlock);
1620 EmitBranchOnBoolExpr(CondOp->getRHS(), TrueBlock, FalseBlock,
1621 TrueCount - LHSScaledTrueCount);
1622 cond.end(*this);
1623
1624 return;
1625 }
1626
1627 if (const CXXThrowExpr *Throw = dyn_cast<CXXThrowExpr>(Cond)) {
1628 // Conditional operator handling can give us a throw expression as a
1629 // condition for a case like:
1630 // br(c ? throw x : y, t, f) -> br(c, br(throw x, t, f), br(y, t, f)
1631 // Fold this to:
1632 // br(c, throw x, br(y, t, f))
1633 EmitCXXThrowExpr(Throw, /*KeepInsertionPoint*/false);
1634 return;
1635 }
1636
1637 // If the branch has a condition wrapped by __builtin_unpredictable,
1638 // create metadata that specifies that the branch is unpredictable.
1639 // Don't bother if not optimizing because that metadata would not be used.
1640 llvm::MDNode *Unpredictable = nullptr;
1641 auto *Call = dyn_cast<CallExpr>(Cond->IgnoreImpCasts());
1642 if (Call && CGM.getCodeGenOpts().OptimizationLevel != 0) {
1643 auto *FD = dyn_cast_or_null<FunctionDecl>(Call->getCalleeDecl());
1644 if (FD && FD->getBuiltinID() == Builtin::BI__builtin_unpredictable) {
1645 llvm::MDBuilder MDHelper(getLLVMContext());
1646 Unpredictable = MDHelper.createUnpredictable();
1647 }
1648 }
1649
1650 // Create branch weights based on the number of times we get here and the
1651 // number of times the condition should be true.
1652 uint64_t CurrentCount = std::max(getCurrentProfileCount(), TrueCount);
1653 llvm::MDNode *Weights =
1654 createProfileWeights(TrueCount, CurrentCount - TrueCount);
1655
1656 // Emit the code with the fully general case.
1657 llvm::Value *CondV;
1658 {
1659 ApplyDebugLocation DL(*this, Cond);
1660 CondV = EvaluateExprAsBool(Cond);
1661 }
1662 Builder.CreateCondBr(CondV, TrueBlock, FalseBlock, Weights, Unpredictable);
1663 }
1664
1665 /// ErrorUnsupported - Print out an error that codegen doesn't support the
1666 /// specified stmt yet.
1667 void CodeGenFunction::ErrorUnsupported(const Stmt *S, const char *Type) {
1668 CGM.ErrorUnsupported(S, Type);
1669 }
1670
1671 /// emitNonZeroVLAInit - Emit the "zero" initialization of a
1672 /// variable-length array whose elements have a non-zero bit-pattern.
1673 ///
1674 /// \param baseType the inner-most element type of the array
1675 /// \param src - a char* pointing to the bit-pattern for a single
1676 /// base element of the array
1677 /// \param sizeInChars - the total size of the VLA, in chars
1678 static void emitNonZeroVLAInit(CodeGenFunction &CGF, QualType baseType,
1679 Address dest, Address src,
1680 llvm::Value *sizeInChars) {
1681 CGBuilderTy &Builder = CGF.Builder;
1682
1683 CharUnits baseSize = CGF.getContext().getTypeSizeInChars(baseType);
1684 llvm::Value *baseSizeInChars
1685 = llvm::ConstantInt::get(CGF.IntPtrTy, baseSize.getQuantity());
1686
1687 Address begin =
1688 Builder.CreateElementBitCast(dest, CGF.Int8Ty, "vla.begin");
1689 llvm::Value *end =
1690 Builder.CreateInBoundsGEP(begin.getPointer(), sizeInChars, "vla.end");
1691
1692 llvm::BasicBlock *originBB = CGF.Builder.GetInsertBlock();
1693 llvm::BasicBlock *loopBB = CGF.createBasicBlock("vla-init.loop");
1694 llvm::BasicBlock *contBB = CGF.createBasicBlock("vla-init.cont");
1695
1696 // Make a loop over the VLA. C99 guarantees that the VLA element
1697 // count must be nonzero.
1698 CGF.EmitBlock(loopBB);
1699
1700 llvm::PHINode *cur = Builder.CreatePHI(begin.getType(), 2, "vla.cur");
1701 cur->addIncoming(begin.getPointer(), originBB);
1702
1703 CharUnits curAlign =
1704 dest.getAlignment().alignmentOfArrayElement(baseSize);
1705
1706 // memcpy the individual element bit-pattern.
1707 Builder.CreateMemCpy(Address(cur, curAlign), src, baseSizeInChars,
1708 /*volatile*/ false);
1709
1710 // Go to the next element.
1711 llvm::Value *next =
1712 Builder.CreateInBoundsGEP(CGF.Int8Ty, cur, baseSizeInChars, "vla.next");
1713
1714 // Leave if that's the end of the VLA.
1715 llvm::Value *done = Builder.CreateICmpEQ(next, end, "vla-init.isdone");
1716 Builder.CreateCondBr(done, contBB, loopBB);
1717 cur->addIncoming(next, loopBB);
1718
1719 CGF.EmitBlock(contBB);
1720 }
1721
1722 void
1723 CodeGenFunction::EmitNullInitialization(Address DestPtr, QualType Ty) {
1724 // Ignore empty classes in C++.
1725 if (getLangOpts().CPlusPlus) {
1726 if (const RecordType *RT = Ty->getAs<RecordType>()) {
1727 if (cast<CXXRecordDecl>(RT->getDecl())->isEmpty())
1728 return;
1729 }
1730 }
1731
1732 // Cast the dest ptr to the appropriate i8 pointer type.
1733 if (DestPtr.getElementType() != Int8Ty)
1734 DestPtr = Builder.CreateElementBitCast(DestPtr, Int8Ty);
1735
1736 // Get size and alignment info for this aggregate.
1737 CharUnits size = getContext().getTypeSizeInChars(Ty);
1738
1739 llvm::Value *SizeVal;
1740 const VariableArrayType *vla;
1741
1742 // Don't bother emitting a zero-byte memset.
1743 if (size.isZero()) {
1744 // But note that getTypeInfo returns 0 for a VLA.
1745 if (const VariableArrayType *vlaType =
1746 dyn_cast_or_null<VariableArrayType>(
1747 getContext().getAsArrayType(Ty))) {
1748 auto VlaSize = getVLASize(vlaType);
1749 SizeVal = VlaSize.NumElts;
1750 CharUnits eltSize = getContext().getTypeSizeInChars(VlaSize.Type);
1751 if (!eltSize.isOne())
1752 SizeVal = Builder.CreateNUWMul(SizeVal, CGM.getSize(eltSize));
1753 vla = vlaType;
1754 } else {
1755 return;
1756 }
1757 } else {
1758 SizeVal = CGM.getSize(size);
1759 vla = nullptr;
1760 }
1761
1762 // If the type contains a pointer to data member we can't memset it to zero.
1763 // Instead, create a null constant and copy it to the destination.
1764 // TODO: there are other patterns besides zero that we can usefully memset,
1765 // like -1, which happens to be the pattern used by member-pointers.
1766 if (!CGM.getTypes().isZeroInitializable(Ty)) {
1767 // For a VLA, emit a single element, then splat that over the VLA.
1768 if (vla) Ty = getContext().getBaseElementType(vla);
1769
1770 llvm::Constant *NullConstant = CGM.EmitNullConstant(Ty);
1771
1772 llvm::GlobalVariable *NullVariable =
1773 new llvm::GlobalVariable(CGM.getModule(), NullConstant->getType(),
1774 /*isConstant=*/true,
1775 llvm::GlobalVariable::PrivateLinkage,
1776 NullConstant, Twine());
1777 CharUnits NullAlign = DestPtr.getAlignment();
1778 NullVariable->setAlignment(NullAlign.getAsAlign());
1779 Address SrcPtr(Builder.CreateBitCast(NullVariable, Builder.getInt8PtrTy()),
1780 NullAlign);
1781
1782 if (vla) return emitNonZeroVLAInit(*this, Ty, DestPtr, SrcPtr, SizeVal);
1783
1784 // Get and call the appropriate llvm.memcpy overload.
1785 Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, false);
1786 return;
1787 }
1788
1789 // Otherwise, just memset the whole thing to zero. This is legal
1790 // because in LLVM, all default initializers (other than the ones we just
1791 // handled above) are guaranteed to have a bit pattern of all zeros.
1792 Builder.CreateMemSet(DestPtr, Builder.getInt8(0), SizeVal, false);
1793 }
1794
1795 llvm::BlockAddress *CodeGenFunction::GetAddrOfLabel(const LabelDecl *L) {
1796 // Make sure that there is a block for the indirect goto.
1797 if (!IndirectBranch)
1798 GetIndirectGotoBlock();
1799
1800 llvm::BasicBlock *BB = getJumpDestForLabel(L).getBlock();
1801
1802 // Make sure the indirect branch includes all of the address-taken blocks.
1803 IndirectBranch->addDestination(BB);
1804 return llvm::BlockAddress::get(CurFn, BB);
1805 }
1806
1807 llvm::BasicBlock *CodeGenFunction::GetIndirectGotoBlock() {
1808 // If we already made the indirect branch for indirect goto, return its block.
1809 if (IndirectBranch) return IndirectBranch->getParent();
1810
1811 CGBuilderTy TmpBuilder(*this, createBasicBlock("indirectgoto"));
1812
1813 // Create the PHI node that indirect gotos will add entries to.
1814 llvm::Value *DestVal = TmpBuilder.CreatePHI(Int8PtrTy, 0,
1815 "indirect.goto.dest");
1816
1817 // Create the indirect branch instruction.
1818 IndirectBranch = TmpBuilder.CreateIndirectBr(DestVal);
1819 return IndirectBranch->getParent();
1820 }
1821
1822 /// Computes the length of an array in elements, as well as the base
1823 /// element type and a properly-typed first element pointer.
1824 llvm::Value *CodeGenFunction::emitArrayLength(const ArrayType *origArrayType,
1825 QualType &baseType,
1826 Address &addr) {
1827 const ArrayType *arrayType = origArrayType;
1828
1829 // If it's a VLA, we have to load the stored size. Note that
1830 // this is the size of the VLA in bytes, not its size in elements.
1831 llvm::Value *numVLAElements = nullptr;
1832 if (isa<VariableArrayType>(arrayType)) {
1833 numVLAElements = getVLASize(cast<VariableArrayType>(arrayType)).NumElts;
1834
1835 // Walk into all VLAs. This doesn't require changes to addr,
1836 // which has type T* where T is the first non-VLA element type.
1837 do {
1838 QualType elementType = arrayType->getElementType();
1839 arrayType = getContext().getAsArrayType(elementType);
1840
1841 // If we only have VLA components, 'addr' requires no adjustment.
1842 if (!arrayType) {
1843 baseType = elementType;
1844 return numVLAElements;
1845 }
1846 } while (isa<VariableArrayType>(arrayType));
1847
1848 // We get out here only if we find a constant array type
1849 // inside the VLA.
1850 }
1851
1852 // We have some number of constant-length arrays, so addr should
1853 // have LLVM type [M x [N x [...]]]*. Build a GEP that walks
1854 // down to the first element of addr.
1855 SmallVector<llvm::Value*, 8> gepIndices;
1856
1857 // GEP down to the array type.
1858 llvm::ConstantInt *zero = Builder.getInt32(0);
1859 gepIndices.push_back(zero);
1860
1861 uint64_t countFromCLAs = 1;
1862 QualType eltType;
1863
1864 llvm::ArrayType *llvmArrayType =
1865 dyn_cast<llvm::ArrayType>(addr.getElementType());
1866 while (llvmArrayType) {
1867 assert(isa<ConstantArrayType>(arrayType));
1868 assert(cast<ConstantArrayType>(arrayType)->getSize().getZExtValue()
1869 == llvmArrayType->getNumElements());
1870
1871 gepIndices.push_back(zero);
1872 countFromCLAs *= llvmArrayType->getNumElements();
1873 eltType = arrayType->getElementType();
1874
1875 llvmArrayType =
1876 dyn_cast<llvm::ArrayType>(llvmArrayType->getElementType());
1877 arrayType = getContext().getAsArrayType(arrayType->getElementType());
1878 assert((!llvmArrayType || arrayType) &&
1879 "LLVM and Clang types are out-of-synch");
1880 }
1881
1882 if (arrayType) {
1883 // From this point onwards, the Clang array type has been emitted
1884 // as some other type (probably a packed struct). Compute the array
1885 // size, and just emit the 'begin' expression as a bitcast.
1886 while (arrayType) {
1887 countFromCLAs *=
1888 cast<ConstantArrayType>(arrayType)->getSize().getZExtValue();
1889 eltType = arrayType->getElementType();
1890 arrayType = getContext().getAsArrayType(eltType);
1891 }
1892
1893 llvm::Type *baseType = ConvertType(eltType);
1894 addr = Builder.CreateElementBitCast(addr, baseType, "array.begin");
1895 } else {
1896 // Create the actual GEP.
1897 addr = Address(Builder.CreateInBoundsGEP(addr.getPointer(),
1898 gepIndices, "array.begin"),
1899 addr.getAlignment());
1900 }
1901
1902 baseType = eltType;
1903
1904 llvm::Value *numElements
1905 = llvm::ConstantInt::get(SizeTy, countFromCLAs);
1906
1907 // If we had any VLA dimensions, factor them in.
1908 if (numVLAElements)
1909 numElements = Builder.CreateNUWMul(numVLAElements, numElements);
1910
1911 return numElements;
1912 }
1913
1914 CodeGenFunction::VlaSizePair CodeGenFunction::getVLASize(QualType type) {
1915 const VariableArrayType *vla = getContext().getAsVariableArrayType(type);
1916 assert(vla && "type was not a variable array type!");
1917 return getVLASize(vla);
1918 }
1919
1920 CodeGenFunction::VlaSizePair
1921 CodeGenFunction::getVLASize(const VariableArrayType *type) {
1922 // The number of elements so far; always size_t.
1923 llvm::Value *numElements = nullptr;
1924
1925 QualType elementType;
1926 do {
1927 elementType = type->getElementType();
1928 llvm::Value *vlaSize = VLASizeMap[type->getSizeExpr()];
1929 assert(vlaSize && "no size for VLA!");
1930 assert(vlaSize->getType() == SizeTy);
1931
1932 if (!numElements) {
1933 numElements = vlaSize;
1934 } else {
1935 // It's undefined behavior if this wraps around, so mark it that way.
1936 // FIXME: Teach -fsanitize=undefined to trap this.
1937 numElements = Builder.CreateNUWMul(numElements, vlaSize);
1938 }
1939 } while ((type = getContext().getAsVariableArrayType(elementType)));
1940
1941 return { numElements, elementType };
1942 }
1943
1944 CodeGenFunction::VlaSizePair
1945 CodeGenFunction::getVLAElements1D(QualType type) {
1946 const VariableArrayType *vla = getContext().getAsVariableArrayType(type);
1947 assert(vla && "type was not a variable array type!");
1948 return getVLAElements1D(vla);
1949 }
1950
1951 CodeGenFunction::VlaSizePair
1952 CodeGenFunction::getVLAElements1D(const VariableArrayType *Vla) {
1953 llvm::Value *VlaSize = VLASizeMap[Vla->getSizeExpr()];
1954 assert(VlaSize && "no size for VLA!");
1955 assert(VlaSize->getType() == SizeTy);
1956 return { VlaSize, Vla->getElementType() };
1957 }
1958
1959 void CodeGenFunction::EmitVariablyModifiedType(QualType type) {
1960 assert(type->isVariablyModifiedType() &&
1961 "Must pass variably modified type to EmitVLASizes!");
1962
1963 EnsureInsertPoint();
1964
1965 // We're going to walk down into the type and look for VLA
1966 // expressions.
1967 do {
1968 assert(type->isVariablyModifiedType());
1969
1970 const Type *ty = type.getTypePtr();
1971 switch (ty->getTypeClass()) {
1972
1973 #define TYPE(Class, Base)
1974 #define ABSTRACT_TYPE(Class, Base)
1975 #define NON_CANONICAL_TYPE(Class, Base)
1976 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
1977 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base)
1978 #include "clang/AST/TypeNodes.inc"
1979 llvm_unreachable("unexpected dependent type!");
1980
1981 // These types are never variably-modified.
1982 case Type::Builtin:
1983 case Type::Complex:
1984 case Type::Vector:
1985 case Type::ExtVector:
1986 case Type::Record:
1987 case Type::Enum:
1988 case Type::Elaborated:
1989 case Type::TemplateSpecialization:
1990 case Type::ObjCTypeParam:
1991 case Type::ObjCObject:
1992 case Type::ObjCInterface:
1993 case Type::ObjCObjectPointer:
1994 llvm_unreachable("type class is never variably-modified!");
1995
1996 case Type::Adjusted:
1997 type = cast<AdjustedType>(ty)->getAdjustedType();
1998 break;
1999
2000 case Type::Decayed:
2001 type = cast<DecayedType>(ty)->getPointeeType();
2002 break;
2003
2004 case Type::Pointer:
2005 type = cast<PointerType>(ty)->getPointeeType();
2006 break;
2007
2008 case Type::BlockPointer:
2009 type = cast<BlockPointerType>(ty)->getPointeeType();
2010 break;
2011
2012 case Type::LValueReference:
2013 case Type::RValueReference:
2014 type = cast<ReferenceType>(ty)->getPointeeType();
2015 break;
2016
2017 case Type::MemberPointer:
2018 type = cast<MemberPointerType>(ty)->getPointeeType();
2019 break;
2020
2021 case Type::ConstantArray:
2022 case Type::IncompleteArray:
2023 // Losing element qualification here is fine.
2024 type = cast<ArrayType>(ty)->getElementType();
2025 break;
2026
2027 case Type::VariableArray: {
2028 // Losing element qualification here is fine.
2029 const VariableArrayType *vat = cast<VariableArrayType>(ty);
2030
2031 // Unknown size indication requires no size computation.
2032 // Otherwise, evaluate and record it.
2033 if (const Expr *size = vat->getSizeExpr()) {
2034 // It's possible that we might have emitted this already,
2035 // e.g. with a typedef and a pointer to it.
2036 llvm::Value *&entry = VLASizeMap[size];
2037 if (!entry) {
2038 llvm::Value *Size = EmitScalarExpr(size);
2039
2040 // C11 6.7.6.2p5:
2041 // If the size is an expression that is not an integer constant
2042 // expression [...] each time it is evaluated it shall have a value
2043 // greater than zero.
2044 if (SanOpts.has(SanitizerKind::VLABound) &&
2045 size->getType()->isSignedIntegerType()) {
2046 SanitizerScope SanScope(this);
2047 llvm::Value *Zero = llvm::Constant::getNullValue(Size->getType());
2048 llvm::Constant *StaticArgs[] = {
2049 EmitCheckSourceLocation(size->getBeginLoc()),
2050 EmitCheckTypeDescriptor(size->getType())};
2051 EmitCheck(std::make_pair(Builder.CreateICmpSGT(Size, Zero),
2052 SanitizerKind::VLABound),
2053 SanitizerHandler::VLABoundNotPositive, StaticArgs, Size);
2054 }
2055
2056 // Always zexting here would be wrong if it weren't
2057 // undefined behavior to have a negative bound.
2058 entry = Builder.CreateIntCast(Size, SizeTy, /*signed*/ false);
2059 }
2060 }
2061 type = vat->getElementType();
2062 break;
2063 }
2064
2065 case Type::FunctionProto:
2066 case Type::FunctionNoProto:
2067 type = cast<FunctionType>(ty)->getReturnType();
2068 break;
2069
2070 case Type::Paren:
2071 case Type::TypeOf:
2072 case Type::UnaryTransform:
2073 case Type::Attributed:
2074 case Type::SubstTemplateTypeParm:
2075 case Type::PackExpansion:
2076 case Type::MacroQualified:
2077 // Keep walking after single level desugaring.
2078 type = type.getSingleStepDesugaredType(getContext());
2079 break;
2080
2081 case Type::Typedef:
2082 case Type::Decltype:
2083 case Type::Auto:
2084 case Type::DeducedTemplateSpecialization:
2085 // Stop walking: nothing to do.
2086 return;
2087
2088 case Type::TypeOfExpr:
2089 // Stop walking: emit typeof expression.
2090 EmitIgnoredExpr(cast<TypeOfExprType>(ty)->getUnderlyingExpr());
2091 return;
2092
2093 case Type::Atomic:
2094 type = cast<AtomicType>(ty)->getValueType();
2095 break;
2096
2097 case Type::Pipe:
2098 type = cast<PipeType>(ty)->getElementType();
2099 break;
2100 }
2101 } while (type->isVariablyModifiedType());
2102 }
2103
2104 Address CodeGenFunction::EmitVAListRef(const Expr* E) {
2105 if (getContext().getBuiltinVaListType()->isArrayType())
2106 return EmitPointerWithAlignment(E);
2107 return EmitLValue(E).getAddress(*this);
2108 }
2109
2110 Address CodeGenFunction::EmitMSVAListRef(const Expr *E) {
2111 return EmitLValue(E).getAddress(*this);
2112 }
2113
2114 void CodeGenFunction::EmitDeclRefExprDbgValue(const DeclRefExpr *E,
2115 const APValue &Init) {
2116 assert(Init.hasValue() && "Invalid DeclRefExpr initializer!");
2117 if (CGDebugInfo *Dbg = getDebugInfo())
2118 if (CGM.getCodeGenOpts().hasReducedDebugInfo())
2119 Dbg->EmitGlobalVariable(E->getDecl(), Init);
2120 }
2121
2122 CodeGenFunction::PeepholeProtection
2123 CodeGenFunction::protectFromPeepholes(RValue rvalue) {
2124 // At the moment, the only aggressive peephole we do in IR gen
2125 // is trunc(zext) folding, but if we add more, we can easily
2126 // extend this protection.
2127
2128 if (!rvalue.isScalar()) return PeepholeProtection();
2129 llvm::Value *value = rvalue.getScalarVal();
2130 if (!isa<llvm::ZExtInst>(value)) return PeepholeProtection();
2131
2132 // Just make an extra bitcast.
2133 assert(HaveInsertPoint());
2134 llvm::Instruction *inst = new llvm::BitCastInst(value, value->getType(), "",
2135 Builder.GetInsertBlock());
2136
2137 PeepholeProtection protection;
2138 protection.Inst = inst;
2139 return protection;
2140 }
2141
2142 void CodeGenFunction::unprotectFromPeepholes(PeepholeProtection protection) {
2143 if (!protection.Inst) return;
2144
2145 // In theory, we could try to duplicate the peepholes now, but whatever.
2146 protection.Inst->eraseFromParent();
2147 }
2148
2149 void CodeGenFunction::EmitAlignmentAssumption(llvm::Value *PtrValue,
2150 QualType Ty, SourceLocation Loc,
2151 SourceLocation AssumptionLoc,
2152 llvm::Value *Alignment,
2153 llvm::Value *OffsetValue) {
2154 llvm::Value *TheCheck;
2155 llvm::Instruction *Assumption = Builder.CreateAlignmentAssumption(
2156 CGM.getDataLayout(), PtrValue, Alignment, OffsetValue, &TheCheck);
2157 if (SanOpts.has(SanitizerKind::Alignment)) {
2158 EmitAlignmentAssumptionCheck(PtrValue, Ty, Loc, AssumptionLoc, Alignment,
2159 OffsetValue, TheCheck, Assumption);
2160 }
2161 }
2162
2163 void CodeGenFunction::EmitAlignmentAssumption(llvm::Value *PtrValue,
2164 const Expr *E,
2165 SourceLocation AssumptionLoc,
2166 llvm::Value *Alignment,
2167 llvm::Value *OffsetValue) {
2168 if (auto *CE = dyn_cast<CastExpr>(E))
2169 E = CE->getSubExprAsWritten();
2170 QualType Ty = E->getType();
2171 SourceLocation Loc = E->getExprLoc();
2172
2173 EmitAlignmentAssumption(PtrValue, Ty, Loc, AssumptionLoc, Alignment,
2174 OffsetValue);
2175 }
2176
2177 llvm::Value *CodeGenFunction::EmitAnnotationCall(llvm::Function *AnnotationFn,
2178 llvm::Value *AnnotatedVal,
2179 StringRef AnnotationStr,
2180 SourceLocation Location) {
2181 llvm::Value *Args[4] = {
2182 AnnotatedVal,
2183 Builder.CreateBitCast(CGM.EmitAnnotationString(AnnotationStr), Int8PtrTy),
2184 Builder.CreateBitCast(CGM.EmitAnnotationUnit(Location), Int8PtrTy),
2185 CGM.EmitAnnotationLineNo(Location)
2186 };
2187 return Builder.CreateCall(AnnotationFn, Args);
2188 }
2189
2190 void CodeGenFunction::EmitVarAnnotations(const VarDecl *D, llvm::Value *V) {
2191 assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute");
2192 // FIXME We create a new bitcast for every annotation because that's what
2193 // llvm-gcc was doing.
2194 for (const auto *I : D->specific_attrs<AnnotateAttr>())
2195 EmitAnnotationCall(CGM.getIntrinsic(llvm::Intrinsic::var_annotation),
2196 Builder.CreateBitCast(V, CGM.Int8PtrTy, V->getName()),
2197 I->getAnnotation(), D->getLocation());
2198 }
2199
2200 Address CodeGenFunction::EmitFieldAnnotations(const FieldDecl *D,
2201 Address Addr) {
2202 assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute");
2203 llvm::Value *V = Addr.getPointer();
2204 llvm::Type *VTy = V->getType();
2205 llvm::Function *F = CGM.getIntrinsic(llvm::Intrinsic::ptr_annotation,
2206 CGM.Int8PtrTy);
2207
2208 for (const auto *I : D->specific_attrs<AnnotateAttr>()) {
2209 // FIXME Always emit the cast inst so we can differentiate between
2210 // annotation on the first field of a struct and annotation on the struct
2211 // itself.
2212 if (VTy != CGM.Int8PtrTy)
2213 V = Builder.CreateBitCast(V, CGM.Int8PtrTy);
2214 V = EmitAnnotationCall(F, V, I->getAnnotation(), D->getLocation());
2215 V = Builder.CreateBitCast(V, VTy);
2216 }
2217
2218 return Address(V, Addr.getAlignment());
2219 }
2220
2221 CodeGenFunction::CGCapturedStmtInfo::~CGCapturedStmtInfo() { }
2222
2223 CodeGenFunction::SanitizerScope::SanitizerScope(CodeGenFunction *CGF)
2224 : CGF(CGF) {
2225 assert(!CGF->IsSanitizerScope);
2226 CGF->IsSanitizerScope = true;
2227 }
2228
2229 CodeGenFunction::SanitizerScope::~SanitizerScope() {
2230 CGF->IsSanitizerScope = false;
2231 }
2232
2233 void CodeGenFunction::InsertHelper(llvm::Instruction *I,
2234 const llvm::Twine &Name,
2235 llvm::BasicBlock *BB,
2236 llvm::BasicBlock::iterator InsertPt) const {
2237 LoopStack.InsertHelper(I);
2238 if (IsSanitizerScope)
2239 CGM.getSanitizerMetadata()->disableSanitizerForInstruction(I);
2240 }
2241
2242 void CGBuilderInserter::InsertHelper(
2243 llvm::Instruction *I, const llvm::Twine &Name, llvm::BasicBlock *BB,
2244 llvm::BasicBlock::iterator InsertPt) const {
2245 llvm::IRBuilderDefaultInserter::InsertHelper(I, Name, BB, InsertPt);
2246 if (CGF)
2247 CGF->InsertHelper(I, Name, BB, InsertPt);
2248 }
2249
2250 static bool hasRequiredFeatures(const SmallVectorImpl<StringRef> &ReqFeatures,
2251 CodeGenModule &CGM, const FunctionDecl *FD,
2252 std::string &FirstMissing) {
2253 // If there aren't any required features listed then go ahead and return.
2254 if (ReqFeatures.empty())
2255 return false;
2256
2257 // Now build up the set of caller features and verify that all the required
2258 // features are there.
2259 llvm::StringMap<bool> CallerFeatureMap;
2260 CGM.getContext().getFunctionFeatureMap(CallerFeatureMap, FD);
2261
2262 // If we have at least one of the features in the feature list return
2263 // true, otherwise return false.
2264 return std::all_of(
2265 ReqFeatures.begin(), ReqFeatures.end(), [&](StringRef Feature) {
2266 SmallVector<StringRef, 1> OrFeatures;
2267 Feature.split(OrFeatures, '|');
2268 return llvm::any_of(OrFeatures, [&](StringRef Feature) {
2269 if (!CallerFeatureMap.lookup(Feature)) {
2270 FirstMissing = Feature.str();
2271 return false;
2272 }
2273 return true;
2274 });
2275 });
2276 }
2277
2278 // Emits an error if we don't have a valid set of target features for the
2279 // called function.
2280 void CodeGenFunction::checkTargetFeatures(const CallExpr *E,
2281 const FunctionDecl *TargetDecl) {
2282 return checkTargetFeatures(E->getBeginLoc(), TargetDecl);
2283 }
2284
2285 // Emits an error if we don't have a valid set of target features for the
2286 // called function.
2287 void CodeGenFunction::checkTargetFeatures(SourceLocation Loc,
2288 const FunctionDecl *TargetDecl) {
2289 // Early exit if this is an indirect call.
2290 if (!TargetDecl)
2291 return;
2292
2293 // Get the current enclosing function if it exists. If it doesn't
2294 // we can't check the target features anyhow.
2295 const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CurCodeDecl);
2296 if (!FD)
2297 return;
2298
2299 // Grab the required features for the call. For a builtin this is listed in
2300 // the td file with the default cpu, for an always_inline function this is any
2301 // listed cpu and any listed features.
2302 unsigned BuiltinID = TargetDecl->getBuiltinID();
2303 std::string MissingFeature;
2304 if (BuiltinID) {
2305 SmallVector<StringRef, 1> ReqFeatures;
2306 const char *FeatureList =
2307 CGM.getContext().BuiltinInfo.getRequiredFeatures(BuiltinID);
2308 // Return if the builtin doesn't have any required features.
2309 if (!FeatureList || StringRef(FeatureList) == "")
2310 return;
2311 StringRef(FeatureList).split(ReqFeatures, ',');
2312 if (!hasRequiredFeatures(ReqFeatures, CGM, FD, MissingFeature))
2313 CGM.getDiags().Report(Loc, diag::err_builtin_needs_feature)
2314 << TargetDecl->getDeclName()
2315 << CGM.getContext().BuiltinInfo.getRequiredFeatures(BuiltinID);
2316
2317 } else if (!TargetDecl->isMultiVersion() &&
2318 TargetDecl->hasAttr<TargetAttr>()) {
2319 // Get the required features for the callee.
2320
2321 const TargetAttr *TD = TargetDecl->getAttr<TargetAttr>();
2322 ParsedTargetAttr ParsedAttr =
2323 CGM.getContext().filterFunctionTargetAttrs(TD);
2324
2325 SmallVector<StringRef, 1> ReqFeatures;
2326 llvm::StringMap<bool> CalleeFeatureMap;
2327 CGM.getContext().getFunctionFeatureMap(CalleeFeatureMap,
2328 GlobalDecl(TargetDecl));
2329
2330 for (const auto &F : ParsedAttr.Features) {
2331 if (F[0] == '+' && CalleeFeatureMap.lookup(F.substr(1)))
2332 ReqFeatures.push_back(StringRef(F).substr(1));
2333 }
2334
2335 for (const auto &F : CalleeFeatureMap) {
2336 // Only positive features are "required".
2337 if (F.getValue())
2338 ReqFeatures.push_back(F.getKey());
2339 }
2340 if (!hasRequiredFeatures(ReqFeatures, CGM, FD, MissingFeature))
2341 CGM.getDiags().Report(Loc, diag::err_function_needs_feature)
2342 << FD->getDeclName() << TargetDecl->getDeclName() << MissingFeature;
2343 }
2344 }
2345
2346 void CodeGenFunction::EmitSanitizerStatReport(llvm::SanitizerStatKind SSK) {
2347 if (!CGM.getCodeGenOpts().SanitizeStats)
2348 return;
2349
2350 llvm::IRBuilder<> IRB(Builder.GetInsertBlock(), Builder.GetInsertPoint());
2351 IRB.SetCurrentDebugLocation(Builder.getCurrentDebugLocation());
2352 CGM.getSanStats().create(IRB, SSK);
2353 }
2354
2355 llvm::Value *
2356 CodeGenFunction::FormResolverCondition(const MultiVersionResolverOption &RO) {
2357 llvm::Value *Condition = nullptr;
2358
2359 if (!RO.Conditions.Architecture.empty())
2360 Condition = EmitX86CpuIs(RO.Conditions.Architecture);
2361
2362 if (!RO.Conditions.Features.empty()) {
2363 llvm::Value *FeatureCond = EmitX86CpuSupports(RO.Conditions.Features);
2364 Condition =
2365 Condition ? Builder.CreateAnd(Condition, FeatureCond) : FeatureCond;
2366 }
2367 return Condition;
2368 }
2369
2370 static void CreateMultiVersionResolverReturn(CodeGenModule &CGM,
2371 llvm::Function *Resolver,
2372 CGBuilderTy &Builder,
2373 llvm::Function *FuncToReturn,
2374 bool SupportsIFunc) {
2375 if (SupportsIFunc) {
2376 Builder.CreateRet(FuncToReturn);
2377 return;
2378 }
2379
2380 llvm::SmallVector<llvm::Value *, 10> Args;
2381 llvm::for_each(Resolver->args(),
2382 [&](llvm::Argument &Arg) { Args.push_back(&Arg); });
2383
2384 llvm::CallInst *Result = Builder.CreateCall(FuncToReturn, Args);
2385 Result->setTailCallKind(llvm::CallInst::TCK_MustTail);
2386
2387 if (Resolver->getReturnType()->isVoidTy())
2388 Builder.CreateRetVoid();
2389 else
2390 Builder.CreateRet(Result);
2391 }
2392
2393 void CodeGenFunction::EmitMultiVersionResolver(
2394 llvm::Function *Resolver, ArrayRef<MultiVersionResolverOption> Options) {
2395 assert(getContext().getTargetInfo().getTriple().isX86() &&
2396 "Only implemented for x86 targets");
2397
2398 bool SupportsIFunc = getContext().getTargetInfo().supportsIFunc();
2399
2400 // Main function's basic block.
2401 llvm::BasicBlock *CurBlock = createBasicBlock("resolver_entry", Resolver);
2402 Builder.SetInsertPoint(CurBlock);
2403 EmitX86CpuInit();
2404
2405 for (const MultiVersionResolverOption &RO : Options) {
2406 Builder.SetInsertPoint(CurBlock);
2407 llvm::Value *Condition = FormResolverCondition(RO);
2408
2409 // The 'default' or 'generic' case.
2410 if (!Condition) {
2411 assert(&RO == Options.end() - 1 &&
2412 "Default or Generic case must be last");
2413 CreateMultiVersionResolverReturn(CGM, Resolver, Builder, RO.Function,
2414 SupportsIFunc);
2415 return;
2416 }
2417
2418 llvm::BasicBlock *RetBlock = createBasicBlock("resolver_return", Resolver);
2419 CGBuilderTy RetBuilder(*this, RetBlock);
2420 CreateMultiVersionResolverReturn(CGM, Resolver, RetBuilder, RO.Function,
2421 SupportsIFunc);
2422 CurBlock = createBasicBlock("resolver_else", Resolver);
2423 Builder.CreateCondBr(Condition, RetBlock, CurBlock);
2424 }
2425
2426 // If no generic/default, emit an unreachable.
2427 Builder.SetInsertPoint(CurBlock);
2428 llvm::CallInst *TrapCall = EmitTrapCall(llvm::Intrinsic::trap);
2429 TrapCall->setDoesNotReturn();
2430 TrapCall->setDoesNotThrow();
2431 Builder.CreateUnreachable();
2432 Builder.ClearInsertionPoint();
2433 }
2434
2435 // Loc - where the diagnostic will point, where in the source code this
2436 // alignment has failed.
2437 // SecondaryLoc - if present (will be present if sufficiently different from
2438 // Loc), the diagnostic will additionally point a "Note:" to this location.
2439 // It should be the location where the __attribute__((assume_aligned))
2440 // was written e.g.
2441 void CodeGenFunction::EmitAlignmentAssumptionCheck(
2442 llvm::Value *Ptr, QualType Ty, SourceLocation Loc,
2443 SourceLocation SecondaryLoc, llvm::Value *Alignment,
2444 llvm::Value *OffsetValue, llvm::Value *TheCheck,
2445 llvm::Instruction *Assumption) {
2446 assert(Assumption && isa<llvm::CallInst>(Assumption) &&
2447 cast<llvm::CallInst>(Assumption)->getCalledValue() ==
2448 llvm::Intrinsic::getDeclaration(
2449 Builder.GetInsertBlock()->getParent()->getParent(),
2450 llvm::Intrinsic::assume) &&
2451 "Assumption should be a call to llvm.assume().");
2452 assert(&(Builder.GetInsertBlock()->back()) == Assumption &&
2453 "Assumption should be the last instruction of the basic block, "
2454 "since the basic block is still being generated.");
2455
2456 if (!SanOpts.has(SanitizerKind::Alignment))
2457 return;
2458
2459 // Don't check pointers to volatile data. The behavior here is implementation-
2460 // defined.
2461 if (Ty->getPointeeType().isVolatileQualified())
2462 return;
2463
2464 // We need to temorairly remove the assumption so we can insert the
2465 // sanitizer check before it, else the check will be dropped by optimizations.
2466 Assumption->removeFromParent();
2467
2468 {
2469 SanitizerScope SanScope(this);
2470
2471 if (!OffsetValue)
2472 OffsetValue = Builder.getInt1(0); // no offset.
2473
2474 llvm::Constant *StaticData[] = {EmitCheckSourceLocation(Loc),
2475 EmitCheckSourceLocation(SecondaryLoc),
2476 EmitCheckTypeDescriptor(Ty)};
2477 llvm::Value *DynamicData[] = {EmitCheckValue(Ptr),
2478 EmitCheckValue(Alignment),
2479 EmitCheckValue(OffsetValue)};
2480 EmitCheck({std::make_pair(TheCheck, SanitizerKind::Alignment)},
2481 SanitizerHandler::AlignmentAssumption, StaticData, DynamicData);
2482 }
2483
2484 // We are now in the (new, empty) "cont" basic block.
2485 // Reintroduce the assumption.
2486 Builder.Insert(Assumption);
2487 // FIXME: Assumption still has it's original basic block as it's Parent.
2488 }
2489
2490 llvm::DebugLoc CodeGenFunction::SourceLocToDebugLoc(SourceLocation Location) {
2491 if (CGDebugInfo *DI = getDebugInfo())
2492 return DI->SourceLocToDebugLoc(Location);
2493
2494 return llvm::DebugLoc();
2495 }
clang::CodeGen::CodeGenTypeCache::Int8PtrPtrTy
llvm::PointerType * Int8PtrPtrTy
Definition: CodeGenTypeCache.h:60
clang::CodeGen::CodeGenModule::getDataLayout
const llvm::DataLayout & getDataLayout() const
Definition: CodeGenModule.h:683
clang::ento::Nullability
Nullability
Definition: CheckerHelpers.h:52
clang::ast_matchers::type
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchersInternal.cpp:638
clang::CodeGen::CGBuilderTy::CreateStructGEP
Address CreateStructGEP(Address Addr, unsigned Index, const llvm::Twine &Name="")
Definition: CGBuilder.h:178
ASTContext.h
Defines the clang::ASTContext interface.
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1783
clang::CodeGen::CodeGenFunction::VlaSizePair
Definition: CodeGenFunction.h:2434
clang::CodeGen::CodeGenFunction::MakeNaturalAlignPointeeAddrLValue
LValue MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T)
Given a value of type T* that may not be to a complete object, construct an l-value with the natural ...
Definition: CodeGenFunction.cpp:220
clang::CodeGen::CodeGenFunction::ConditionalEvaluation::end
void end(CodeGenFunction &CGF)
Definition: CodeGenFunction.h:1030
clang::ImplicitParamDecl::Other
Other implicit parameter.
Definition: Decl.h:1555
clang::EST_None
no exception specification
Definition: ExceptionSpecificationType.h:21
clang::if
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
Definition: RecursiveASTVisitor.h:1045
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2614
clang::ASTContext::VoidPtrTy
CanQualType VoidPtrTy
Definition: ASTContext.h:1044
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:654
clang::CodeGen::CodeGenModule::getTypes
CodeGenTypes & getTypes()
Definition: CodeGenModule.h:698
clang::CodeGen::CodeGenFunction::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T)
Definition: CodeGenFunction.cpp:229
clang::CodeGen::CodeGenFunction::EmitBranchOnBoolExpr
void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock, llvm::BasicBlock *FalseBlock, uint64_t TrueCount)
EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g.
Definition: CodeGenFunction.cpp:1470
clang::CodeGen::CodeGenModule::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenModule.h:680
clang::CodeGen::CGFunctionInfo::isReturnsRetained
bool isReturnsRetained() const
In ARC, whether this function retains its return value.
Definition: CGFunctionInfo.h:594
clang::CodeGen::CodeGenFunction::EmitCheckTypeDescriptor
llvm::Constant * EmitCheckTypeDescriptor(QualType T)
Emit a description of a type in a format suitable for passing to a runtime sanitizer handler...
Definition: CGExpr.cpp:2808
clang::CodeGen::CodeGenFunction::HaveInsertPoint
bool HaveInsertPoint() const
HaveInsertPoint - True if an insertion point is defined.
Definition: CodeGenFunction.h:2112
clang::CodeGen::CodeGenFunction::EncodeAddrForUseInPrologue
llvm::Constant * EncodeAddrForUseInPrologue(llvm::Function *F, llvm::Constant *Addr)
Encode an address into a form suitable for use in a function prologue.
Definition: CodeGenFunction.cpp:555
clang::XRayInstrSet::Mask
XRayInstrMask Mask
Definition: XRayInstr.h:64
llvm
Specialize PointerLikeTypeTraits to allow LazyGenerationalUpdatePtr to be placed into a PointerUnion...
Definition: Dominators.h:30
clang::CodeGen::CGCXXABI::addImplicitStructorParams
virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy, FunctionArgList &Params)=0
Insert any ABI-specific implicit parameters into the parameter list for a function.
clang::CodeGen::CodeGenModule::getClassPointerAlignment
CharUnits getClassPointerAlignment(const CXXRecordDecl *CD)
Returns the assumed alignment of an opaque pointer to the given class.
Definition: CGClass.cpp:37
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3422
clang::LangOptions::Sanitize
SanitizerSet Sanitize
Set of enabled sanitizers.
Definition: LangOptions.h:234
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:557
clang::FunctionDecl::isMain
bool isMain() const
Determines whether this function is "main", which is the entry point into an executable program...
Definition: Decl.cpp:2926
clang::TargetInfo::getTriple
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:994
endsWithReturn
static bool endsWithReturn(const Decl *F)
Determine whether the function F ends with a return stmt.
Definition: CodeGenFunction.cpp:642
clang::CXXMethodDecl::getThisType
QualType getThisType() const
Return the type of the this pointer.
Definition: DeclCXX.cpp:2328
clang::CodeGen::CodeGenFunction::TCK_ConstructorCall
Checking the &#39;this&#39; pointer for a constructor call.
Definition: CodeGenFunction.h:2614
clang::CodeGen::CodeGenFunction::EmitPointerWithAlignment
Address EmitPointerWithAlignment(const Expr *Addr, LValueBaseInfo *BaseInfo=nullptr, TBAAAccessInfo *TBAAInfo=nullptr)
EmitPointerWithAlignment - Given an expression with a pointer type, emit the value and compute our be...
Definition: CGExpr.cpp:1039
clang::XRayInstrKind::Typed
constexpr XRayInstrMask Typed
Definition: XRayInstr.h:40
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
clang::CodeGen::CodeGenFunction::CurCodeDecl
const Decl * CurCodeDecl
CurCodeDecl - This is the inner-most code context, which includes blocks.
Definition: CodeGenFunction.h:298
clang::CodeGen::CodeGenFunction::EmitLambdaStaticInvokeBody
void EmitLambdaStaticInvokeBody(const CXXMethodDecl *MD)
Definition: CGClass.cpp:2933
clang::CodeGen::CodeGenFunction::EmitCheck
void EmitCheck(ArrayRef< std::pair< llvm::Value *, SanitizerMask >> Checked, SanitizerHandler Check, ArrayRef< llvm::Constant *> StaticArgs, ArrayRef< llvm::Value *> DynamicArgs)
Create a basic block that will either trap or call a handler function in the UBSan runtime with the p...
Definition: CGExpr.cpp:3022
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1450
clang::CodeGen::CodeGenFunction::ShouldInstrumentFunction
bool ShouldInstrumentFunction()
ShouldInstrumentFunction - Return true if the current function should be instrumented with __cyg_prof...
Definition: CodeGenFunction.cpp:522
clang::DiagnosticsEngine::Report
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1300
clang::APValue::hasValue
bool hasValue() const
Definition: APValue.h:359
clang::FunctionDecl::usesSEHTry
bool usesSEHTry() const
Indicates the function uses __try.
Definition: Decl.h:2233
clang::CodeGen::CodeGenFunction::GenerateCode
void GenerateCode(GlobalDecl GD, llvm::Function *Fn, const CGFunctionInfo &FnInfo)
Definition: CodeGenFunction.cpp:1245
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2889
clang::CharUnits::isZero
bool isZero() const
isZero - Test whether the quantity equals zero.
Definition: CharUnits.h:116
hasRequiredFeatures
static bool hasRequiredFeatures(const SmallVectorImpl< StringRef > &ReqFeatures, CodeGenModule &CGM, const FunctionDecl *FD, std::string &FirstMissing)
Definition: CodeGenFunction.cpp:2250
clang::CodeGen::EHScopeStack::stable_begin
stable_iterator stable_begin() const
Create a stable reference to the top of the EH stack.
Definition: EHScopeStack.h:378
clang::ASTContext::getTargetInfo
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:707
clang::CodeGen::CodeGenFunction::InsertHelper
void InsertHelper(llvm::Instruction *I, const llvm::Twine &Name, llvm::BasicBlock *BB, llvm::BasicBlock::iterator InsertPt) const
CGBuilder insert helper.
Definition: CodeGenFunction.cpp:2233
clang::LCD_None
Definition: Lambda.h:23
clang::CodeGen::CodeGenModule::imbueXRayAttrs
bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, StringRef Category=StringRef()) const
Imbue XRay attributes to a function, applying the always/never attribute lists in the process...
Definition: CodeGenModule.cpp:2312
clang::AutoTypeKeyword::Auto
auto
clang::XRayInstrKind::Function
constexpr XRayInstrMask Function
Definition: XRayInstr.h:38
clang::CodeGen::CodeGenTypeCache::Int8Ty
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
Definition: CodeGenTypeCache.h:37
clang::CXXConstructorDecl
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2383
clang::CodeGen::CodeGenFunction::ConstantFoldsToSimpleInteger
bool ConstantFoldsToSimpleInteger(const Expr *Cond, bool &Result, bool AllowLabels=false)
ConstantFoldsToSimpleInteger - If the specified expression does not fold to a constant, or if it does but contains a label, return false.
Definition: CodeGenFunction.cpp:1433
clang::ArrayType::getElementType
QualType getElementType() const
Definition: Type.h:2910
Value
Value
Definition: UninitializedValues.cpp:101
clang::CodeGen::EHScopeStack::empty
bool empty() const
Determines whether the exception-scopes stack is empty.
Definition: EHScopeStack.h:344
clang::LangOptions::FPRoundingModeKind
FPRoundingModeKind
Possible rounding modes.
Definition: LangOptions.h:198
ASTLambda.h
This file provides some common utility functions for processing Lambda related AST Constructs...
clang::CodeGen::TypeEvaluationKind
TypeEvaluationKind
The kind of evaluation to perform on values of a particular type.
Definition: CodeGenFunction.h:105
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:820
clang::FunctionDecl::getReturnType
QualType getReturnType() const
Definition: Decl.h:2445
clang::CodeGen::CodeGenFunction::SanitizerScope
RAII object to set/unset CodeGenFunction::IsSanitizerScope.
Definition: CodeGenFunction.h:460
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:7002
clang::FunctionProtoType::ExtProtoInfo
Extra information about a function prototype.
Definition: Type.h:3837
shouldEmitLifetimeMarkers
static bool shouldEmitLifetimeMarkers(const CodeGenOptions &CGOpts, const LangOptions &LangOpts)
shouldEmitLifetimeMarkers - Decide whether we need emit the life-time markers.
Definition: CodeGenFunction.cpp:48
clang::CodeGen::CodeGenFunction::getProfileCount
uint64_t getProfileCount(const Stmt *S)
Get the profiler&#39;s count for the given statement.
Definition: CodeGenFunction.h:1363
clang::CodeGen::CGDebugInfo
This class gathers all debug information during compilation and is responsible for emitting to llvm g...
Definition: CGDebugInfo.h:54
clang::CodeGen::CodeGenFunction::mightAddDeclToScope
static bool mightAddDeclToScope(const Stmt *S)
Determine if the given statement might introduce a declaration into the current scope, by being a (possibly-labelled) DeclStmt.
Definition: CodeGenFunction.cpp:1407
clang::CodeGen::CodeGenModule::getDiags
DiagnosticsEngine & getDiags() const
Definition: CodeGenModule.h:682
clang::CodeGen::CodeGenFunction::EmitTrapCall
llvm::CallInst * EmitTrapCall(llvm::Intrinsic::ID IntrID)
Emit a call to trap or debugtrap and attach function attribute "trap-func-name" if specified...
Definition: CGExpr.cpp:3322
clang::CodeGen::CodeGenFunction::EmitVariablyModifiedType
void EmitVariablyModifiedType(QualType Ty)
EmitVLASize - Capture all the sizes for the VLA expressions in the given variably-modified type and s...
Definition: CodeGenFunction.cpp:1959
clang::CodeGen::CodeGenFunction::setCurrentProfileCount
void setCurrentProfileCount(uint64_t Count)
Set the profiler&#39;s current count.
Definition: CodeGenFunction.h:1371
clang::CodeGen::CodeGenFunction::ShouldXRayInstrumentFunction
bool ShouldXRayInstrumentFunction() const
ShouldXRayInstrument - Return true if the current function should be instrumented with XRay nop sleds...
Definition: CodeGenFunction.cpp:534
clang::CodeGen::Address::getPointer
llvm::Value * getPointer() const
Definition: Address.h:37
clang::CodeGen::TargetCodeGenInfo::getUBSanFunctionSignature
virtual llvm::Constant * getUBSanFunctionSignature(CodeGen::CodeGenModule &CGM) const
Return a constant used by UBSan as a signature to identify functions possessing type information...
Definition: TargetInfo.h:168
clang::CodeGen::CodeGenFunction::markAsIgnoreThreadCheckingAtRuntime
void markAsIgnoreThreadCheckingAtRuntime(llvm::Function *Fn)
Annotate the function with an attribute that disables TSan checking at runtime.
Definition: CodeGenFunction.cpp:657
clang::CodeGen::CodeGenFunction::IsSanitizerScope
bool IsSanitizerScope
True if CodeGen currently emits code implementing sanitizer checks.
Definition: CodeGenFunction.h:457
StmtObjC.h
Defines the Objective-C statement AST node classes.
clang::CodeGen::CodeGenTypes::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T)
ConvertTypeForMem - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:86
clang::CXXThrowExpr
A C++ throw-expression (C++ [except.throw]).
Definition: ExprCXX.h:1140
clang::TargetInfo::supportsIFunc
bool supportsIFunc() const
Identify whether this target supports IFuncs.
Definition: TargetInfo.h:1152
clang::MultiVersionKind::Target
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1595
clang::CodeGen::CodeGenFunction::destroyBlockInfos
static void destroyBlockInfos(CGBlockInfo *info)
Destroy a chain of block layouts.
Definition: CGBlocks.cpp:891
clang::CodeGen::CodeGenFunction::emitImplicitAssignmentOperatorBody
void emitImplicitAssignmentOperatorBody(FunctionArgList &Args)
Definition: CGClass.cpp:1533
clang::CodeGen::CodeGenFunction::PrologueCleanupDepth
EHScopeStack::stable_iterator PrologueCleanupDepth
PrologueCleanupDepth - The cleanup depth enclosing all the cleanups associated with the parameters...
Definition: CodeGenFunction.h:322
clang::CodeGen::CodeGenFunction::JumpDest
A jump destination is an abstract label, branching to which may require a jump out through normal cle...
Definition: CodeGenFunction.h:235
clang::CodeGen::TEK_Aggregate
Definition: CodeGenFunction.h:108
clang::CodeGen::CodeGenFunction::getJumpDestForLabel
JumpDest getJumpDestForLabel(const LabelDecl *S)
getBasicBlockForLabel - Return the LLVM basicblock that the specified label maps to.
Definition: CGStmt.cpp:528
clang::CodeGen::CodeGenFunction::LambdaCaptureFields
llvm::DenseMap< const VarDecl *, FieldDecl * > LambdaCaptureFields
Definition: CodeGenFunction.h:491
clang::CodeGen::CodeGenFunction::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenFunction.h:1669
clang::CodeGen::CodeGenFunction::ConditionalEvaluation
An object to manage conditionally-evaluated expressions.
Definition: CodeGenFunction.h:1017
clang::CodeGen::CodeGenFunction::protectFromPeepholes
PeepholeProtection protectFromPeepholes(RValue rvalue)
protectFromPeepholes - Protect a value that we&#39;re intending to store to the side, but which will prob...
Definition: CodeGenFunction.cpp:2123
clang::NamedDecl::getDeclName
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:272
CGDebugInfo.h
clang::CodeGen::CodeGenFunction::EmitAlignmentAssumptionCheck
void EmitAlignmentAssumptionCheck(llvm::Value *Ptr, QualType Ty, SourceLocation Loc, SourceLocation AssumptionLoc, llvm::Value *Alignment, llvm::Value *OffsetValue, llvm::Value *TheCheck, llvm::Instruction *Assumption)
Definition: CodeGenFunction.cpp:2441
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:57
clang::CodeGen::CodeGenFunction::getVLAElements1D
VlaSizePair getVLAElements1D(const VariableArrayType *vla)
Return the number of elements for a single dimension for the given array type.
Definition: CodeGenFunction.cpp:1952
clang::CodeGen::CodeGenFunction::FirstBlockInfo
CGBlockInfo * FirstBlockInfo
FirstBlockInfo - The head of a singly-linked-list of block layouts.
Definition: CodeGenFunction.h:537
clang::CodeGen::CodeGenFunction::EmitFunctionEpilog
void EmitFunctionEpilog(const CGFunctionInfo &FI, bool EmitRetDbgLoc, SourceLocation EndLoc)
EmitFunctionEpilog - Emit the target specific LLVM code to return the given temporary.
Definition: CGCall.cpp:2828
CreateMultiVersionResolverReturn
static void CreateMultiVersionResolverReturn(CodeGenModule &CGM, llvm::Function *Resolver, CGBuilderTy &Builder, llvm::Function *FuncToReturn, bool SupportsIFunc)
Definition: CodeGenFunction.cpp:2370
clang::IdentifierInfo::isStr
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
Definition: IdentifierTable.h:136
clang::CodeGen::ABIArgInfo::Indirect
Indirect - Pass the argument indirectly via a hidden pointer with the specified alignment (0 indicate...
Definition: CGFunctionInfo.h:49
clang::CodeGen::CodeGenFunction::getDebugInfo
CGDebugInfo * getDebugInfo()
Definition: CodeGenFunction.h:1628
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:227
clang::CodeGen::CodeGenTypes::ConvertType
llvm::Type * ConvertType(QualType T)
ConvertType - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:381
clang::CodeGen::CodeGenFunction::CurSEHParent
const NamedDecl * CurSEHParent
Definition: CodeGenFunction.h:478
clang::OpenCL
Definition: LangStandard.h:56
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:168
clang::CodeGen::CodeGenFunction::EmitLValueForLambdaField
LValue EmitLValueForLambdaField(const FieldDecl *Field)
Given that we are currently emitting a lambda, emit an l-value for one of its members.
Definition: CGExpr.cpp:3968
llvm::Optional
Definition: LLVM.h:37
clang::SanitizerSet::hasOneOf
bool hasOneOf(SanitizerMask K) const
Check if one or more sanitizers are enabled.
Definition: Sanitizers.h:159
clang::CodeGen::TEK_Complex
Definition: CodeGenFunction.h:107
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3963
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2729
clang::CodeGen::CodeGenTypeCache::SizeTy
llvm::IntegerType * SizeTy
Definition: CodeGenTypeCache.h:47
clang::FunctionDecl::usesFPIntrin
bool usesFPIntrin() const
Indicates the function uses Floating Point constrained intrinsics.
Definition: Decl.h:2237
clang::interp::Zero
bool Zero(InterpState &S, CodePtr OpPC)
Definition: Interp.h:812
clang::SanitizerSet::Mask
SanitizerMask Mask
Bitmask of enabled sanitizers.
Definition: Sanitizers.h:174
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:263
CodeGenPGO.h
max
__DEVICE__ int max(int __a, int __b)
Definition: __clang_cuda_device_functions.h:1628
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:53
clang::CodeGen::CodeGenFunction::InitTempAlloca
void InitTempAlloca(Address Alloca, llvm::Value *Value)
InitTempAlloca - Provide an initial value for the given alloca which will be observable at all locati...
Definition: CGExpr.cpp:126
clang::CodeGen::SanitizerMetadata::disableSanitizerForInstruction
void disableSanitizerForInstruction(llvm::Instruction *I)
Definition: SanitizerMetadata.cpp:86
llvm::SmallVectorImpl
Definition: LLVM.h:36
clang::CodeGen::CodeGenFunction::AlwaysEmitXRayTypedEvents
bool AlwaysEmitXRayTypedEvents() const
AlwaysEmitXRayTypedEvents - Return true if clang must unconditionally emit XRay typed event handling ...
Definition: CodeGenFunction.cpp:547
StmtCXX.h
clang::FunctionDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2399
clang::Language::CUDA
clang::CodeGen::CodeGenFunction::CreateIRTemp
Address CreateIRTemp(QualType T, const Twine &Name="tmp")
CreateIRTemp - Create a temporary IR object of the given type, with appropriate alignment.
Definition: CGExpr.cpp:134
clang::CodeGen::CGCXXABI::EmitInstanceFunctionProlog
virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF)=0
Emit the ABI-specific prolog for the function.
clang::LangOptions::FPR_Dynamic
Is determined by runtime environment, corresponds to "round.dynamic".
Definition: LangOptions.h:208
clang::CodeGen::CodeGenModule::getCUDARuntime
CGCUDARuntime & getCUDARuntime()
Return a reference to the configured CUDA runtime.
Definition: CodeGenModule.h:596
clang::CodeGen::CodeGenFunction::hasScalarEvaluationKind
static bool hasScalarEvaluationKind(QualType T)
Definition: CodeGenFunction.h:2062
clang::FunctionDecl::getBody
Stmt * getBody(const FunctionDecl *&Definition) const
Retrieve the body (definition) of the function.
Definition: Decl.cpp:2894
clang::CodeGen::CGBuilderTy::CreateElementBitCast
Address CreateElementBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Cast the element type of the given address to a different type, preserving information like the align...
Definition: CGBuilder.h:156
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:588
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:2289
clang::CodeGen::CodeGenFunction::AlwaysEmitXRayCustomEvents
bool AlwaysEmitXRayCustomEvents() const
AlwaysEmitXRayCustomEvents - Return true if we must unconditionally emit XRay custom event handling c...
Definition: CodeGenFunction.cpp:540
clang::CharUnits::isOne
bool isOne() const
isOne - Test whether the quantity equals one.
Definition: CharUnits.h:119
clang::CodeGen::CodeGenModule::getTBAAAccessInfo
TBAAAccessInfo getTBAAAccessInfo(QualType AccessType)
getTBAAAccessInfo - Get TBAA information that describes an access to an object of the given type...
Definition: CodeGenModule.cpp:678
clang::CodeGen::Address::getAlignment
CharUnits getAlignment() const
Return the alignment of this pointer.
Definition: Address.h:66
clang::Stmt::children
child_range children()
Definition: Stmt.cpp:224
clang::CodeGen::CGCXXABI::hasMostDerivedReturn
virtual bool hasMostDerivedReturn(GlobalDecl GD) const
Definition: CGCXXABI.h:108
clang::CodeGen::ABIArgInfo::getInAllocaFieldIndex
unsigned getInAllocaFieldIndex() const
Definition: CGFunctionInfo.h:374
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3434
clang::QualType::isVolatileQualified
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
Definition: Type.h:6326
clang::CodeGen::AlignmentSource::AttributedType
The l-value was considered opaque, so the alignment was determined from a type, but that type was an ...
clang::GlobalDecl::getCtorType
CXXCtorType getCtorType() const
Definition: GlobalDecl.h:79
clang::CodeGen::CGBuilderTy::CreateMemCpy
llvm::CallInst * CreateMemCpy(Address Dest, Address Src, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:274
clang::CodeGen::EHScopeStack::containsOnlyLifetimeMarkers
bool containsOnlyLifetimeMarkers(stable_iterator Old) const
Definition: CGCleanup.cpp:141
clang::SanitizerSet
Definition: Sanitizers.h:151
clang::CXXRecordDecl::isLambda
bool isLambda() const
Determine whether this class describes a lambda function object.
Definition: DeclCXX.h:960
clang::NullabilityKind::NonNull
Values of this type can never be null.
clang::VariableArrayType::getSizeExpr
Expr * getSizeExpr() const
Definition: Type.h:3058
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6256
clang::CodeGen::CodeGenFunction::createBasicBlock
llvm::BasicBlock * createBasicBlock(const Twine &name="", llvm::Function *parent=nullptr, llvm::BasicBlock *before=nullptr)
createBasicBlock - Create an LLVM basic block.
Definition: CodeGenFunction.h:2071
clang::CodeGen::CodeGenFunction::EmitIgnoredExpr
void EmitIgnoredExpr(const Expr *E)
EmitIgnoredExpr - Emit an expression in a context which ignores the result.
Definition: CGExpr.cpp:182
clang::CodeGen::CodeGenPGO::assignRegionCounters
void assignRegionCounters(GlobalDecl GD, llvm::Function *Fn)
Assign counters to regions and configure them for PGO of a given function.
Definition: CodeGenPGO.cpp:760
clang::CodeGen::CodeGenFunction::CurGD
GlobalDecl CurGD
CurGD - The GlobalDecl for the current function being compiled.
Definition: CodeGenFunction.h:318
clang::CodeGen::CodeGenTypeCache::getPointerAlign
CharUnits getPointerAlign() const
Definition: CodeGenTypeCache.h:108
clang::CXXMethodDecl::isInstance
bool isInstance() const
Definition: DeclCXX.h:1959
clang::CodeGen::CodeGenFunction::ContainsLabel
static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts=false)
ContainsLabel - Return true if the statement contains a label in it.
Definition: CodeGenFunction.cpp:1354
clang::ASTContext::isAlignmentRequired
bool isAlignmentRequired(const Type *T) const
Determine if the alignment the type has was required using an alignment attribute.
Definition: ASTContext.cpp:1875
clang::CodeGen::CodeGenModule::getSanStats
llvm::SanitizerStatReport & getSanStats()
Definition: CodeGenModule.cpp:5905
clang::CodeGen::CodeGenFunction::EmitReturnBlock
llvm::DebugLoc EmitReturnBlock()
Emit the unified return block, trying to avoid its emission when possible.
Definition: CodeGenFunction.cpp:291
clang::isLambdaCallOperator
bool isLambdaCallOperator(const CXXMethodDecl *MD)
Definition: ASTLambda.h:27
clang::CodeGen::CodeGenFunction::incrementProfileCounter
void incrementProfileCounter(const Stmt *S, llvm::Value *StepV=nullptr)
Increment the profiler&#39;s counter for the given statement by StepV.
Definition: CodeGenFunction.h:1356
clang::CodeGen::CodeGenFunction::getCurrentProfileCount
uint64_t getCurrentProfileCount()
Get the profiler&#39;s current count.
Definition: CodeGenFunction.h:1377
CGFunctionInfo.h
clang::FunctionDecl::getBuiltinID
unsigned getBuiltinID(bool ConsiderWrapperFunctions=false) const
Returns a value indicating whether this function corresponds to a builtin function.
Definition: Decl.cpp:3173
llvm::ArrayRef
Definition: LLVM.h:31
clang::CodeGen::CodeGenFunction::NormalCleanupDest
Address NormalCleanupDest
i32s containing the indexes of the cleanup destinations.
Definition: CodeGenFunction.h:532
clang::CodeGen::CGCUDARuntime::emitDeviceStub
virtual void emitDeviceStub(CodeGenFunction &CGF, FunctionArgList &Args)=0
Emits a kernel launch stub.
clang::CodeGen::CodeGenFunction::EmitCheckValue
llvm::Value * EmitCheckValue(llvm::Value *V)
Convert a value into a format suitable for passing to a runtime sanitizer handler.
Definition: CGExpr.cpp:2851
FrontendDiagnostic.h
clang::Expr::IgnoreImpCasts
Expr * IgnoreImpCasts() LLVM_READONLY
Skip past any implicit casts which might surround this expression until reaching a fixed point...
Definition: Expr.cpp:2970
clang::CodeGen::CodeGenFunction::ConditionalEvaluation::begin
void begin(CodeGenFunction &CGF)
Definition: CodeGenFunction.h:1024
clang::CodeGen::CodeGenFunction::TCK_MemberCall
Checking the &#39;this&#39; pointer for a call to a non-static member function.
Definition: CodeGenFunction.h:2612
clang::ImplicitParamDecl::Create
static ImplicitParamDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, ImplicitParamKind ParamKind)
Create implicit parameter.
Definition: Decl.cpp:4685
clang::OMF_initialize
Definition: IdentifierTable.h:646
clang::CodeGen::LoopInfoStack::InsertHelper
void InsertHelper(llvm::Instruction *I) const
Function called by the CodeGenFunction when an instruction is created.
Definition: CGLoopInfo.cpp:765
clang::LangOptions::FPR_Upward
Rounding toward +Inf, corresponds to "round.upward".
Definition: LangOptions.h:204
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:542
clang::ConditionalOperator
ConditionalOperator - The ?: ternary operator.
Definition: Expr.h:3732
clang::CodeGen::CGFunctionInfo::getReturnType
CanQualType getReturnType() const
Definition: CGFunctionInfo.h:630
clang::CodeGen::Address::isValid
bool isValid() const
Definition: Address.h:35
clang::CharUnits::One
static CharUnits One()
One - Construct a CharUnits quantity of one.
Definition: CharUnits.h:58
clang::ParsedTargetAttr
Contains information gathered from parsing the contents of TargetAttr.
Definition: Attr.h:333
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1332
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:1690
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1627
ToConstrainedExceptMD
static llvm::fp::ExceptionBehavior ToConstrainedExceptMD(LangOptions::FPExceptionModeKind Kind)
Definition: CodeGenFunction.cpp:126
clang::CodeGen::CodeGenModule::getTargetCodeGenInfo
const TargetCodeGenInfo & getTargetCodeGenInfo()
Definition: TargetInfo.cpp:9783
clang::FunctionDecl::getOverloadedOperator
OverloadedOperatorKind getOverloadedOperator() const
getOverloadedOperator - Which C++ overloaded operator this function represents, if any...
Definition: Decl.cpp:3501
clang::CodeGen::RValue
RValue - This trivial value class is used to represent the result of an expression that is evaluated...
Definition: CGValue.h:39
clang::CodeGen::CodeGenFunction::EmitSanitizerStatReport
void EmitSanitizerStatReport(llvm::SanitizerStatKind SSK)
Definition: CodeGenFunction.cpp:2346
ToConstrainedRoundingMD
static llvm::fp::RoundingMode ToConstrainedRoundingMD(LangOptions::FPRoundingModeKind Kind)
Definition: CodeGenFunction.cpp:111
EmitIfUsed
static void EmitIfUsed(CodeGenFunction &CGF, llvm::BasicBlock *BB)
Definition: CodeGenFunction.cpp:337
clang::CharUnits::getQuantity
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
clang::CodeGen::CodeGenFunction::DecodeAddrUsedInPrologue
llvm::Value * DecodeAddrUsedInPrologue(llvm::Value *F, llvm::Value *EncodedAddr)
Decode an address used in a function prologue, encoded by EncodeAddrForUseInPrologue.
Definition: CodeGenFunction.cpp:578
clang::CodeGen::CodeGenFunction::CreateDefaultAlignTempAlloca
Address CreateDefaultAlignTempAlloca(llvm::Type *Ty, const Twine &Name="tmp")
CreateDefaultAlignedTempAlloca - This creates an alloca with the default ABI alignment of the given L...
Definition: CGExpr.cpp:119
clang::CodeGen::CGCXXABI::HasThisReturn
virtual bool HasThisReturn(GlobalDecl GD) const
Returns true if the given constructor or destructor is one of the kinds that the ABI says returns &#39;th...
Definition: CGCXXABI.h:106
Offset
unsigned Offset
Definition: Format.cpp:1827
clang::CodeGen::CodeGenFunction::MultiVersionResolverOption::Conds::Features
llvm::SmallVector< StringRef, 8 > Features
Definition: CodeGenFunction.h:4354
clang::CodeGen::CodeGenFunction::getEvaluationKind
static TypeEvaluationKind getEvaluationKind(QualType T)
getEvaluationKind - Return the TypeEvaluationKind of QualType T.
Definition: CodeGenFunction.cpp:237
clang::CodeGen::CodeGenModule::EmitAnnotationUnit
llvm::Constant * EmitAnnotationUnit(SourceLocation Loc)
Emit the annotation&#39;s translation unit.
Definition: CodeGenModule.cpp:2212
clang::CodeGen::CodeGenFunction::EHResumeBlock
llvm::BasicBlock * EHResumeBlock
EHResumeBlock - Unified block containing a call to llvm.eh.resume.
Definition: CodeGenFunction.h:540
clang::FunctionDecl::isMultiVersion
bool isMultiVersion() const
True if this function is considered a multiversioned function.
Definition: Decl.h:2351
clang::Expr
This represents one expression.
Definition: Expr.h:108
clang::FunctionDecl::isDefaulted
bool isDefaulted() const
Whether this function is defaulted per C++0x.
Definition: Decl.h:2130
clang::CodeGen::Address::invalid
static Address invalid()
Definition: Address.h:34
CodeGenModule.h
clang::CodeGen::LValue::getAddress
Address getAddress(CodeGenFunction &CGF) const
Definition: CGValue.h:327
clang::CodeGen::CodeGenFunction::LoopStack
LoopInfoStack LoopStack
Definition: CodeGenFunction.h:262
clang::CPlusPlus
Definition: LangStandard.h:47
clang::CodeGen::CodeGenFunction::VlaSizePair::NumElts
llvm::Value * NumElts
Definition: CodeGenFunction.h:2435
clang::CodeGen::CodeGenFunction::JumpDest::getBlock
llvm::BasicBlock * getBlock() const
Definition: CodeGenFunction.h:243
clang::Type::isObjCRetainableType
bool isObjCRetainableType() const
Definition: Type.cpp:4060
V
#define V(N, I)
Definition: ASTContext.h:2941
clang::OMF_dealloc
Definition: IdentifierTable.h:640
clang::LangOptions::FPExceptionModeKind
FPExceptionModeKind
Possible floating point exception behavior.
Definition: LangOptions.h:212
TryMarkNoThrow
static void TryMarkNoThrow(llvm::Function *F)
Tries to mark the given function nounwind based on the non-existence of any throwing calls within it...
Definition: CodeGenFunction.cpp:1176
CGCXXABI.h
clang::CodeGen::CodeGenFunction::getVLASize
VlaSizePair getVLASize(const VariableArrayType *vla)
Returns an LLVM value that corresponds to the size, in non-variably-sized elements, of a variable length array type, plus that largest non-variably-sized element type.
Definition: CodeGenFunction.cpp:1921
clang::Builtin::Context::getRequiredFeatures
const char * getRequiredFeatures(unsigned ID) const
Definition: Builtins.h:208
clang::ASTContext::getTypeAlignInChars
CharUnits getTypeAlignInChars(QualType T) const
Return the ABI-specified alignment of a (complete) type T, in characters.
Definition: ASTContext.cpp:2392
clang::CodeGen::CodeGenFunction::MultiVersionResolverOption::Conds::Architecture
StringRef Architecture
Definition: CodeGenFunction.h:4353
clang::CharUnits::fromQuantity
static CharUnits fromQuantity(QuantityType Quantity)
fromQuantity - Construct a CharUnits quantity from a raw integer type.
Definition: CharUnits.h:63
clang::ast_matchers::arrayType
const AstTypeMatcher< ArrayType > arrayType
Matches all kinds of arrays.
Definition: ASTMatchersInternal.cpp:858
clang::CodeGen::CodeGenFunction::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenFunction.h:1670
clang::CodeGen::CodeGenFunction::GetIndirectGotoBlock
llvm::BasicBlock * GetIndirectGotoBlock()
Definition: CodeGenFunction.cpp:1807
clang::CodeGen::CodeGenModule::GenOpenCLArgMetadata
void GenOpenCLArgMetadata(llvm::Function *FN, const FunctionDecl *FD=nullptr, CodeGenFunction *CGF=nullptr)
OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument information in the program executab...
Definition: CodeGenModule.cpp:1279
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:1928
clang::CodeGen::CodeGenTypeCache::Int32Ty
llvm::IntegerType * Int32Ty
Definition: CodeGenTypeCache.h:37
clang::Expr::getType
QualType getType() const
Definition: Expr.h:137
clang::CodeGen::CodeGenFunction::JumpDest::isValid
bool isValid() const
Definition: CodeGenFunction.h:242
clang::CodeGen::CodeGenFunction::EmitConstructorBody
void EmitConstructorBody(FunctionArgList &Args)
EmitConstructorBody - Emits the body of the current constructor.
Definition: CGClass.cpp:818
clang::CodeGen::CodeGenFunction::EmitTypeCheck
void EmitTypeCheck(TypeCheckKind TCK, SourceLocation Loc, llvm::Value *V, QualType Type, CharUnits Alignment=CharUnits::Zero(), SanitizerSet SkippedChecks=SanitizerSet(), llvm::Value *ArraySize=nullptr)
Emit a check that V is the address of storage of the appropriate size and alignment for an object of ...
Definition: CGExpr.cpp:653
clang::CharUnits::alignmentOfArrayElement
CharUnits alignmentOfArrayElement(CharUnits elementSize) const
Given that this is the alignment of the first element of an array, return the minimum alignment of an...
Definition: CharUnits.h:201
clang::CodeGen::ABIArgInfo::getIndirectByVal
bool getIndirectByVal() const
Definition: CGFunctionInfo.h:347
clang::CodeGen::CodeGenModule::EmitAnnotationString
llvm::Constant * EmitAnnotationString(StringRef Str)
Emit an annotation string.
Definition: CodeGenModule.cpp:2196
clang::CodeGen::CodeGenFunction::MakeNaturalAlignAddrLValue
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T)
Definition: CodeGenFunction.cpp:209
clang::CodeGen::CGBuilderTy::CreateMemSet
llvm::CallInst * CreateMemSet(Address Dest, llvm::Value *Value, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:296
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:217
clang::ASTContext::getFunctionTypeWithExceptionSpec
QualType getFunctionTypeWithExceptionSpec(QualType Orig, const FunctionProtoType::ExceptionSpecInfo &ESI)
Get a function type and produce the equivalent function type with the specified exception specificati...
Definition: ASTContext.cpp:2985
clang::CodeGen::CodeGenFunction::PeepholeProtection
An object which temporarily prevents a value from being destroyed by aggressive peephole optimization...
Definition: CodeGenFunction.h:1079
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:2046
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:1401
clang::DeclRefExpr::getDecl
ValueDecl * getDecl()
Definition: Expr.h:1247
clang::CodeGen::CodeGenModule::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenModule.h:675
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:674
CodeGenFunction.h
clang::MangleContext::startNewFunction
virtual void startNewFunction()
Definition: Mangle.h:75
clang::CallingConv
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:265
clang::GlobalDecl
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:40
clang::CodeGen::CodeGenFunction::SanitizerScope::SanitizerScope
SanitizerScope(CodeGenFunction *CGF)
Definition: CodeGenFunction.cpp:2223
clang::CodeGen::ABIArgInfo::getKind
Kind getKind() const
Definition: CGFunctionInfo.h:254
clang::CodeGen::CodeGenFunction::Bypasses
VarBypassDetector Bypasses
Definition: CodeGenFunction.h:267
clang::CodeGen::AlignmentSource::Type
The l-value was considered opaque, so the alignment was determined from a type.
clang::CodeGen::CodeGenFunction::PopCleanupBlocks
void PopCleanupBlocks(EHScopeStack::stable_iterator OldCleanupStackSize, std::initializer_list< llvm::Value **> ValuesToReload={})
Takes the old cleanup stack size and emits the cleanup blocks that have been added.
Definition: CGCleanup.cpp:417
CGCleanup.h
clang::SanitizerSet::set
void set(SanitizerMask K, bool Value)
Enable or disable a certain (single) sanitizer.
Definition: Sanitizers.h:162
clang::CodeGen::CodeGenFunction::SawAsmBlock
bool SawAsmBlock
Whether we processed a Microsoft-style asm block during CodeGen.
Definition: CodeGenFunction.h:476
clang::CodeGen::CGBuilderTy::CreateBitCast
Address CreateBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:141
Kind
Kind
Definition: ChrootChecker.cpp:29
clang::CodeGen::CodeGenFunction::CurFn
llvm::Function * CurFn
Definition: CodeGenFunction.h:301
Attr.h
clang::QualType::getCanonicalType
QualType getCanonicalType() const
Definition: Type.h:6295
clang::CodeGen::CodeGenFunction::MultiVersionResolverOption
Definition: CodeGenFunction.h:4349
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::CodeGen::CodeGenFunction::EnsureInsertPoint
void EnsureInsertPoint()
EnsureInsertPoint - Ensure that an insertion point is defined so that emitted IR has a place to go...
Definition: CodeGenFunction.h:2120
APSInt
llvm::APSInt APSInt
Definition: ByteCodeEmitter.cpp:18
clang::ASTContext::filterFunctionTargetAttrs
ParsedTargetAttr filterFunctionTargetAttrs(const TargetAttr *TD) const
Parses the target attributes passed in, and returns only the ones that are valid feature names...
Definition: ASTContext.cpp:10926
clang::CodeGen::ABIArgInfo::isSRetAfterThis
bool isSRetAfterThis() const
Definition: CGFunctionInfo.h:365
clang::QualType::getSingleStepDesugaredType
QualType getSingleStepDesugaredType(const ASTContext &Context) const
Return the specified type with one level of "sugar" removed from the type.
Definition: Type.h:967
clang::CodeGen::CodeGenFunction::EvaluateExprAsBool
llvm::Value * EvaluateExprAsBool(const Expr *E)
EvaluateExprAsBool - Perform the usual unary conversions on the specified expression and compare the ...
Definition: CGExpr.cpp:164
clang::Type::isVariablyModifiedType
bool isVariablyModifiedType() const
Whether this type is a variably-modified type (C99 6.7.5).
Definition: Type.h:2166
clang::LangOptions::FPR_ToNearest
Rounding to nearest, corresponds to "round.tonearest".
Definition: LangOptions.h:200
clang::CodeGen::CodeGenTypes::inheritingCtorHasParams
bool inheritingCtorHasParams(const InheritedConstructor &Inherited, CXXCtorType Type)
Determine if a C++ inheriting constructor should have parameters matching those of its inherited cons...
Definition: CGCall.cpp:296
clang::CodeGen::CodeGenFunction::getNaturalPointeeTypeAlignment
CharUnits getNaturalPointeeTypeAlignment(QualType T, LValueBaseInfo *BaseInfo=nullptr, TBAAAccessInfo *TBAAInfo=nullptr)
Definition: CodeGenFunction.cpp:154
clang::VectorType::getElementType
QualType getElementType() const
Definition: Type.h:3270
clang::GlobalDecl::getDecl
const Decl * getDecl() const
Definition: GlobalDecl.h:77
clang::LabelDecl
Represents the declaration of a label.
Definition: Decl.h:451
clang::ParsedAttr
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:117
clang::CodeGen::ApplyDebugLocation
A scoped helper to set the current debug location to the specified location or preferred location of ...
Definition: CGDebugInfo.h:737
clang::CodeGen::CGBuilderInserter::InsertHelper
void InsertHelper(llvm::Instruction *I, const llvm::Twine &Name, llvm::BasicBlock *BB, llvm::BasicBlock::iterator InsertPt) const
This forwards to CodeGenFunction::InsertHelper.
Definition: CodeGenFunction.cpp:2242
clang::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:5822
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1931
clang::CodeGen::CodeGenFunction::EmitStmt
void EmitStmt(const Stmt *S, ArrayRef< const Attr *> Attrs=None)
EmitStmt - Emit the code for the statement.
Definition: CGStmt.cpp:45
clang::CodeGen::CodeGenFunction::SanitizerScope::~SanitizerScope
~SanitizerScope()
Definition: CodeGenFunction.cpp:2229
clang::CodeGen::CodeGenFunction::SanOpts
SanitizerSet SanOpts
Sanitizers enabled for this function.
Definition: CodeGenFunction.h:454
clang::XRayInstrKind::Custom
constexpr XRayInstrMask Custom
Definition: XRayInstr.h:39
clang::CodeGen::CodeGenModule::GetAddrOfRTTIDescriptor
llvm::Constant * GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH=false)
Get the address of the RTTI descriptor for the given type.
Definition: CodeGenModule.cpp:5772
clang::ASTContext::getAsArrayType
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
Definition: ASTContext.cpp:5711
Paren
Definition: PPMacroExpansion.cpp:629
clang::LangOptions::FPR_Downward
Rounding toward -Inf, corresponds to "round.downward".
Definition: LangOptions.h:202
clang::SanitizerMask
Definition: Sanitizers.h:29
llvm::SmallVector< llvm::Value *, 4 >
clang::CodeGen::Address
An aligned address.
Definition: Address.h:24
clang::interp::APInt
llvm::APInt APInt
Definition: Integral.h:27
clang::CodeGen::CodeGenFunction::StartFunction
void StartFunction(GlobalDecl GD, QualType RetTy, llvm::Function *Fn, const CGFunctionInfo &FnInfo, const FunctionArgList &Args, SourceLocation Loc=SourceLocation(), SourceLocation StartLoc=SourceLocation())
Emit code for the start of a function.
Definition: CodeGenFunction.cpp:700
clang::CodeGen::CodeGenFunction::ReturnValuePointer
Address ReturnValuePointer
ReturnValuePointer - The temporary alloca to hold a pointer to sret.
Definition: CodeGenFunction.h:333
clang::CodeGenOptions::XRayInstrumentationBundle
XRayInstrSet XRayInstrumentationBundle
Set of XRay instrumentation kinds to emit.
Definition: CodeGenOptions.h:307
clang::Type::getTypeClass
TypeClass getTypeClass() const
Definition: Type.h:1876
clang::CodeGen::CGCXXABI::getMangleContext
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:96
clang::CodeGen::CodeGenFunction::SetFPModel
void SetFPModel()
SetFPModel - Control floating point behavior via fp-model settings.
Definition: CodeGenFunction.cpp:137
clang::CodeGen::CodeGenFunction::getJumpDestInCurrentScope
JumpDest getJumpDestInCurrentScope(llvm::BasicBlock *Target)
The given basic block lies in the current EH scope, but may be a target of a potentially scope-crossi...
Definition: CodeGenFunction.h:983
clang::CodeGen::CodeGenModule::EmitAnnotationLineNo
llvm::Constant * EmitAnnotationLineNo(SourceLocation L)
Emit the annotation line number.
Definition: CodeGenModule.cpp:2220
clang::CodeGen::ABIArgInfo::InAlloca
InAlloca - Pass the argument directly using the LLVM inalloca attribute.
Definition: CGFunctionInfo.h:72
CGCUDARuntime.h
clang::CodeGen::CodeGenFunction::getNaturalTypeAlignment
CharUnits getNaturalTypeAlignment(QualType T, LValueBaseInfo *BaseInfo=nullptr, TBAAAccessInfo *TBAAInfo=nullptr, bool forPointeeType=false)
Definition: CodeGenFunction.cpp:161
clang::FunctionDecl::hasImplicitReturnZero
bool hasImplicitReturnZero() const
Whether falling off this function implicitly returns null/zero.
Definition: Decl.h:2158
clang::CodeGen::CodeGenFunction::EmitMSVAListRef
Address EmitMSVAListRef(const Expr *E)
Emit a "reference" to a __builtin_ms_va_list; this is always the value of the expression, because a __builtin_ms_va_list is a pointer to a char.
Definition: CodeGenFunction.cpp:2110
clang::CodeGen::CodeGenFunction::CurFnInfo
const CGFunctionInfo * CurFnInfo
Definition: CodeGenFunction.h:299
clang::CodeGen::CodeGenFunction::EmitStartEHSpec
void EmitStartEHSpec(const Decl *D)
EmitStartEHSpec - Emit the start of the exception spec.
Definition: CGException.cpp:445
clang::CodeGen::CodeGenFunction::FinishFunction
void FinishFunction(SourceLocation EndLoc=SourceLocation())
FinishFunction - Complete IR generation of the current function.
Definition: CodeGenFunction.cpp:344
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:224
clang::CodeGen::CGBuilderInserter
This is an IRBuilder insertion helper that forwards to CodeGenFunction::InsertHelper, which adds necessary metadata to instructions.
Definition: CGBuilder.h:25
clang::CodeGen::CodeGenFunction::EmitVAListRef
Address EmitVAListRef(const Expr *E)
Definition: CodeGenFunction.cpp:2104
clang::CodeGen::CodeGenFunction::EmitScalarExpr
llvm::Value * EmitScalarExpr(const Expr *E, bool IgnoreResultAssign=false)
EmitScalarExpr - Emit the computation of the specified expression of LLVM scalar type, returning the result.
Definition: CGExprScalar.cpp:4543
clang::CodeGen::FunctionArgList
FunctionArgList - Type for representing both the decl and type of parameters to a function...
Definition: CGCall.h:355
clang::CodeGen::RValue::getScalarVal
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:59
CGOpenMPRuntime.h
CGBlocks.h
clang::CodeGen::CodeGenFunction::EHStack
EHScopeStack EHStack
Definition: CodeGenFunction.h:498
clang::CodeGen::CodeGenModule::ErrorUnsupported
void ErrorUnsupported(const Stmt *S, const char *Type)
Print out an error that codegen doesn&#39;t support the specified stmt yet.
Definition: CodeGenModule.cpp:751
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:476
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:280
clang::CodeGen::CodeGenModule::getOpenMPRuntime
CGOpenMPRuntime & getOpenMPRuntime()
Return a reference to the configured OpenMP runtime.
Definition: CodeGenModule.h:587
clang::CodeGen::CodeGenFunction::EmitDeclRefExprDbgValue
void EmitDeclRefExprDbgValue(const DeclRefExpr *E, const APValue &Init)
Definition: CodeGenFunction.cpp:2114
emitNonZeroVLAInit
static void emitNonZeroVLAInit(CodeGenFunction &CGF, QualType baseType, Address dest, Address src, llvm::Value *sizeInChars)
emitNonZeroVLAInit - Emit the "zero" initialization of a variable-length array whose elements have a ...
Definition: CodeGenFunction.cpp:1678
Decl.h
clang::CodeGen::CodeGenFunction::EmitAnnotationCall
llvm::Value * EmitAnnotationCall(llvm::Function *AnnotationFn, llvm::Value *AnnotatedVal, StringRef AnnotationStr, SourceLocation Location)
Emit an annotation call (intrinsic).
Definition: CodeGenFunction.cpp:2177
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::CodeGen::ApplyDebugLocation::CreateDefaultArtificial
static ApplyDebugLocation CreateDefaultArtificial(CodeGenFunction &CGF, SourceLocation TemporaryLocation)
Apply TemporaryLocation if it is valid.
Definition: CGDebugInfo.h:776
clang::LangOptions::FPE_Ignore
Assume that floating-point exceptions are masked.
Definition: LangOptions.h:214
clang::CodeGen::CodeGenFunction::EmitFieldAnnotations
Address EmitFieldAnnotations(const FieldDecl *D, Address V)
Emit field annotations for the given field & value.
Definition: CodeGenFunction.cpp:2200
clang::Expr::EvalResult
EvalResult is a struct with detailed info about an evaluated expression.
Definition: Expr.h:586
clang::CodeGen::CodeGenFunction::FnRetTy
QualType FnRetTy
Definition: CodeGenFunction.h:300
matchesStlAllocatorFn
static bool matchesStlAllocatorFn(const Decl *D, const ASTContext &Ctx)
Definition: CodeGenFunction.cpp:671
clang::CodeGen::VarBypassDetector::Init
void Init(const Stmt *Body)
Clear the object and pre-process for the given statement, usually function body statement.
Definition: VarBypassDetector.cpp:20
clang::CodeGen::CodeGenFunction::CGCapturedStmtInfo::~CGCapturedStmtInfo
virtual ~CGCapturedStmtInfo()
Definition: CodeGenFunction.cpp:2221
CodeGenOptions.h
clang::CodeGen::CGBuilderTy::CreateAlignedLoad
llvm::LoadInst * CreateAlignedLoad(llvm::Value *Addr, CharUnits Align, const llvm::Twine &Name="")
Definition: CGBuilder.h:90
type
clang::CodeGen::CGBuilderTy::CreateLoad
llvm::LoadInst * CreateLoad(Address Addr, const llvm::Twine &Name="")
Definition: CGBuilder.h:69
clang::CodeGen::CodeGenTypeCache::IntPtrTy
llvm::IntegerType * IntPtrTy
Definition: CodeGenTypeCache.h:46
clang::FunctionDecl::getTemplateInstantiationPattern
FunctionDecl * getTemplateInstantiationPattern() const
Retrieve the function declaration from which this function could be instantiated, if it is an instant...
Definition: Decl.cpp:3612
clang::CC_C
Definition: Specifiers.h:266
clang::Stmt::getStmtClass
StmtClass getStmtClass() const
Definition: Stmt.h:1109
clang::CodeGen::CodeGenFunction::EmitFunctionBody
void EmitFunctionBody(const Stmt *Body)
Definition: CodeGenFunction.cpp:1143
clang::CXXMethodDecl::getParent
const CXXRecordDecl * getParent() const
Return the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2046
clang::Decl::getNonClosureContext
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:994
clang::FunctionDecl::isMSVCRTEntryPoint
bool isMSVCRTEntryPoint() const
Determines whether this function is a MSVCRT user defined entry point.
Definition: Decl.cpp:2934
clang::CodeGen::CGCXXABI::buildThisParam
void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params)
Build a parameter variable suitable for &#39;this&#39;.
Definition: CGCXXABI.cpp:122
clang::CodeGen::CodeGenModule::EmitNullConstant
llvm::Constant * EmitNullConstant(QualType T)
Return the result of value-initializing the given type, i.e.
Definition: CGExprConstant.cpp:2295
clang::CodeGen::CodeGenModule::getIntrinsic
llvm::Function * getIntrinsic(unsigned IID, ArrayRef< llvm::Type *> Tys=None)
Definition: CodeGenModule.cpp:4621
clang::CodeGen::CodeGenFunction::LifetimeExtendedCleanupStack
llvm::SmallVector< char, 256 > LifetimeExtendedCleanupStack
Definition: CodeGenFunction.h:499
clang::XRayInstrSet::has
bool has(XRayInstrMask K) const
Definition: XRayInstr.h:46
clang::CodeGen::CGBuilderTy::CreateStore
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:107
clang::CodeGen::CodeGenModule::getModule
llvm::Module & getModule() const
Definition: CodeGenModule.h:681
clang::CodeGen::CodeGenFunction::MakeAddrLValue
LValue MakeAddrLValue(Address Addr, QualType T, AlignmentSource Source=AlignmentSource::Type)
Definition: CodeGenFunction.h:2133
clang::CodeGenOptions::hasProfileClangInstr
bool hasProfileClangInstr() const
Check if Clang profile instrumenation is on.
Definition: CodeGenOptions.h:333
clang::CodeGen::CodeGenFunction::ReturnBlock
JumpDest ReturnBlock
ReturnBlock - Unified return block.
Definition: CodeGenFunction.h:325
clang::LangOptions::FPR_TowardZero
Rounding toward zero, corresponds to "round.towardzero".
Definition: LangOptions.h:206
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4495
clang::CodeGen::CodeGenFunction::EmitBlockWithFallThrough
void EmitBlockWithFallThrough(llvm::BasicBlock *BB, const Stmt *S)
When instrumenting to collect profile data, the counts for some blocks such as switch cases need to n...
Definition: CodeGenFunction.cpp:1155
clang::CodeGen::CodeGenFunction::SourceLocToDebugLoc
llvm::DebugLoc SourceLocToDebugLoc(SourceLocation Location)
Converts Location to a DebugLoc, if debug information is enabled.
Definition: CodeGenFunction.cpp:2490
clang::CodeGen::CodeGenFunction::getTypes
CodeGenTypes & getTypes() const
Definition: CodeGenFunction.h:1626
clang::CodeGen::ABIArgInfo::getIndirectAlign
CharUnits getIndirectAlign() const
Definition: CGFunctionInfo.h:338
clang::Decl::getAttr
T * getAttr() const
Definition: DeclBase.h:538
clang::CodeGen::Address::getElementType
llvm::Type * getElementType() const
Return the type of the values stored in this address.
Definition: Address.h:51
clang::CodeGen::CodeGenTypeCache::Int8PtrTy
llvm::PointerType * Int8PtrTy
Definition: CodeGenTypeCache.h:54
clang::CodeGen::CodeGenFunction::AllocaInsertPt
llvm::AssertingVH< llvm::Instruction > AllocaInsertPt
AllocaInsertPoint - This is an instruction in the entry block before which we prefer to insert alloca...
Definition: CodeGenFunction.h:344
clang::ExtVectorType
ExtVectorType - Extended vector type.
Definition: Type.h:3354
clang::CodeGen::CodeGenFunction::BuildFunctionArgList
QualType BuildFunctionArgList(GlobalDecl GD, FunctionArgList &Args)
Definition: CodeGenFunction.cpp:1189
clang::CodeGenOptions
CodeGenOptions - Track various options which control how the code is optimized and passed to the back...
Definition: CodeGenOptions.h:46
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:473
clang::CodeGenOptions::hasReducedDebugInfo
bool hasReducedDebugInfo() const
Check if type and variable info should be emitted.
Definition: CodeGenOptions.h:362
clang::CodeGen::CodeGenFunction::checkTargetFeatures
void checkTargetFeatures(const CallExpr *E, const FunctionDecl *TargetDecl)
Definition: CodeGenFunction.cpp:2280
clang::Type::getNullability
Optional< NullabilityKind > getNullability(const ASTContext &context) const
Determine the nullability of the given type.
Definition: Type.cpp:3828
clang::CodeGen::CodeGenFunction::LambdaThisCaptureField
FieldDecl * LambdaThisCaptureField
Definition: CodeGenFunction.h:492
clang::APValue
APValue - This class implements a discriminated union of [uninitialized] [APSInt] [APFloat]...
Definition: APValue.h:115
clang::CodeGen::CGFunctionInfo::getReturnInfo
ABIArgInfo & getReturnInfo()
Definition: CGFunctionInfo.h:632
clang::CXXRecordDecl::getCaptureFields
void getCaptureFields(llvm::DenseMap< const VarDecl *, FieldDecl *> &Captures, FieldDecl *&ThisCapture) const
For a closure type, retrieve the mapping from captured variables and this to the non-static data memb...
Definition: DeclCXX.cpp:1454
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:2115
clang::CodeGen::CodeGenModule::getSize
llvm::ConstantInt * getSize(CharUnits numChars)
Emit the given number of characters as a value of type size_t.
Definition: CodeGenModule.cpp:768
clang::CodeGen::CodeGenFunction::CurFuncDecl
const Decl * CurFuncDecl
CurFuncDecl - Holds the Decl for the current outermost non-closure context.
Definition: CodeGenFunction.h:296
clang::Decl::specific_attrs
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:524
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2372
DeclCXX.h
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
clang::Expr::EvaluateAsInt
bool EvaluateAsInt(EvalResult &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects, bool InConstantContext=false) const
EvaluateAsInt - Return true if this is a constant which we can fold and convert to an integer...
Definition: ExprConstant.cpp:13770
clang::CodeGen::CodeGenFunction::unprotectFromPeepholes
void unprotectFromPeepholes(PeepholeProtection protection)
Definition: CodeGenFunction.cpp:2142
clang::CodeGen::CodeGenFunction::isCoroutine
bool isCoroutine() const
Definition: CodeGenFunction.h:313
clang::CodeGen::CodeGenFunction::ErrorUnsupported
void ErrorUnsupported(const Stmt *S, const char *Type)
ErrorUnsupported - Print out an error that codegen doesn&#39;t support the specified stmt yet...
Definition: CodeGenFunction.cpp:1667
clang::Qualifiers::hasUnaligned
bool hasUnaligned() const
Definition: Type.h:299
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:253
clang::CodeGen::CodeGenFunction::EmitBranch
void EmitBranch(llvm::BasicBlock *Block)
EmitBranch - Emit a branch to the specified basic block from the current insert block, taking care to avoid creation of branches from dummy blocks.
Definition: CGStmt.cpp:493
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:6777
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:233
clang::CodeGen::CodeGenFunction::EmitFunctionProlog
void EmitFunctionProlog(const CGFunctionInfo &FI, llvm::Function *Fn, const FunctionArgList &Args)
EmitFunctionProlog - Emit the target specific LLVM code to load the arguments for the given function...
Definition: CGCall.cpp:2257
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6283
getPrologueSignature
static llvm::Constant * getPrologueSignature(CodeGenModule &CGM, const FunctionDecl *FD)
Return the UBSan prologue signature for FD if one is available.
Definition: CodeGenFunction.cpp:692
clang::CXXRecordDecl::getLambdaCaptureDefault
LambdaCaptureDefault getLambdaCaptureDefault() const
Definition: DeclCXX.h:996
clang::CodeGen::CodeGenFunction::EmitLValue
LValue EmitLValue(const Expr *E)
EmitLValue - Emit code to compute a designator that specifies the location of the expression...
Definition: CGExpr.cpp:1246
clang::CodeGen::CodeGenFunction::ReturnValue
Address ReturnValue
ReturnValue - The temporary alloca to hold the return value.
Definition: CodeGenFunction.h:329
clang::ASTContext::BuiltinInfo
Builtin::Context & BuiltinInfo
Definition: ASTContext.h:582
clang::ASTContext::getFunctionFeatureMap
void getFunctionFeatureMap(llvm::StringMap< bool > &FeatureMap, const FunctionDecl *) const
Definition: ASTContext.cpp:10940
iterator
clang::CodeGen::CodeGenFunction::AutoreleaseResult
bool AutoreleaseResult
In ARC, whether we should autorelease the return value.
Definition: CodeGenFunction.h:472
clang::CodeGen::CodeGenFunction::EmitLoadOfLValue
RValue EmitLoadOfLValue(LValue V, SourceLocation Loc)
EmitLoadOfLValue - Given an expression that represents a value lvalue, this method emits the address ...
Definition: CGExpr.cpp:1777
clang::SanitizerSet::has
bool has(SanitizerMask K) const
Check if a certain (single) sanitizer is enabled.
Definition: Sanitizers.h:153
clang::CodeGen::CodeGenFunction::MultiVersionResolverOption::Function
llvm::Function * Function
Definition: CodeGenFunction.h:4350
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:2546
clang::CodeGen::CodeGenFunction::EmitMultiVersionResolver
void EmitMultiVersionResolver(llvm::Function *Resolver, ArrayRef< MultiVersionResolverOption > Options)
Definition: CodeGenFunction.cpp:2393
clang::CodeGen::CodeGenModule::getCXXABI
CGCXXABI & getCXXABI() const
Definition: CodeGenModule.h:691
clang::CodeGen::TBAAAccessInfo
Definition: CodeGenTBAA.h:42
clang::ASTContext::getAsVariableArrayType
const VariableArrayType * getAsVariableArrayType(QualType T) const
Definition: ASTContext.h:2469
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1171
shouldUseUndefinedBehaviorReturnOptimization
static bool shouldUseUndefinedBehaviorReturnOptimization(const FunctionDecl *FD, const ASTContext &Context)
Definition: CodeGenFunction.cpp:1233
clang::CodeGen::CodeGenFunction::EmitDestructorBody
void EmitDestructorBody(FunctionArgList &Args)
EmitDestructorBody - Emits the body of the current destructor.
Definition: CGClass.cpp:1420
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6504
clang::CodeGen::CodeGenTypeCache
This structure provides a set of types that are commonly used during IR emission. ...
Definition: CodeGenTypeCache.h:32
clang::TypedefType
Definition: Type.h:4240
clang::CodeGen::TEK_Scalar
Definition: CodeGenFunction.h:106
clang::CodeGen::CodeGenFunction::EmitEndEHSpec
void EmitEndEHSpec(const Decl *D)
EmitEndEHSpec - Emit the end of the exception spec.
Definition: CGException.cpp:522
clang::CodeGen::CodeGenFunction::MultiVersionResolverOption::Conditions
struct clang::CodeGen::CodeGenFunction::MultiVersionResolverOption::Conds Conditions
clang::CodeGen::LValueBaseInfo
Definition: CGValue.h:150
clang::ASTContext::getTypeSizeInChars
CharUnits getTypeSizeInChars(QualType T) const
Return the size of the specified (complete) type T, in characters.
Definition: ASTContext.cpp:2383
clang::CodeGen::CodeGenFunction::EmitCheckSourceLocation
llvm::Constant * EmitCheckSourceLocation(SourceLocation Loc)
Emit a description of a source location in a format suitable for passing to a runtime sanitizer handl...
Definition: CGExpr.cpp:2889
clang::interp::Null
bool Null(InterpState &S, CodePtr OpPC)
Definition: Interp.h:818
clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope
Address EmitCompoundStmtWithoutScope(const CompoundStmt &S, bool GetLast=false, AggValueSlot AVS=AggValueSlot::ignored())
Definition: CGStmt.cpp:399
clang::CodeGen::CodeGenFunction::EmitAlignmentAssumption
void EmitAlignmentAssumption(llvm::Value *PtrValue, QualType Ty, SourceLocation Loc, SourceLocation AssumptionLoc, llvm::Value *Alignment, llvm::Value *OffsetValue=nullptr)
Definition: CodeGenFunction.cpp:2149
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:630
clang::CodeGen::CGBuilderTy
Definition: CGBuilder.h:44
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:207
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:167
clang::CodeGen::CodeGenFunction::GetAddrOfLabel
llvm::BlockAddress * GetAddrOfLabel(const LabelDecl *L)
Definition: CodeGenFunction.cpp:1795
clang::CallExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.cpp:1531
clang::CodeGen::CodeGenFunction::EmitVarAnnotations
void EmitVarAnnotations(const VarDecl *D, llvm::Value *V)
Emit local annotations for the local variable V, declared by D.
Definition: CodeGenFunction.cpp:2190
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:258
clang::VariableArrayType
Represents a C array with a specified size that is not an integer-constant-expression.
Definition: Type.h:3039
clang::LangOptions::FPE_Strict
Strictly preserve the floating-point exception semantics.
Definition: LangOptions.h:218
clang::CodeGen::CodeGenModule::getSanitizerMetadata
SanitizerMetadata * getSanitizerMetadata()
Definition: CodeGenModule.h:1243
clang::CodeGen::CodeGenFunction::CurFuncIsThunk
bool CurFuncIsThunk
In C++, whether we are code generating a thunk.
Definition: CodeGenFunction.h:469
clang::APValue::getInt
APSInt & getInt()
Definition: APValue.h:380
clang::CodeGen::CodeGenFunction::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenFunction.h:1640
clang::CodeGen::CGBuilderTy::CreatePointerBitCastOrAddrSpaceCast
Address CreatePointerBitCastOrAddrSpaceCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:163
clang::CodeGen::CodeGenFunction::emitArrayLength
llvm::Value * emitArrayLength(const ArrayType *arrayType, QualType &baseType, Address &addr)
emitArrayLength - Compute the length of an array, even if it&#39;s a VLA, and drill down to the base elem...
Definition: CodeGenFunction.cpp:1824
clang::CodeGen::LValue::MakeAddr
static LValue MakeAddr(Address address, QualType type, ASTContext &Context, LValueBaseInfo BaseInfo, TBAAAccessInfo TBAAInfo)
Definition: CGValue.h:369
clang::CodeGen::CodeGenFunction::containsBreak
static bool containsBreak(const Stmt *S)
containsBreak - Return true if the statement contains a break out of it.
Definition: CodeGenFunction.cpp:1386
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:216
clang::CodeGen::CodeGenTypes::isZeroInitializable
bool isZeroInitializable(QualType T)
IsZeroInitializable - Return whether a type can be zero-initialized (in the C++ sense) with an LLVM z...
Definition: CodeGenTypes.cpp:797
Builtins.h
Defines enum values for all the target-independent builtin functions.
clang::CodeGen::CodeGenFunction::~CodeGenFunction
~CodeGenFunction()
Definition: CodeGenFunction.cpp:96
clang::CodeGen::CodeGenFunction::EmitCXXThrowExpr
void EmitCXXThrowExpr(const CXXThrowExpr *E, bool KeepInsertionPoint=true)
Definition: CGException.cpp:424
clang::CodeGen::RValue::isScalar
bool isScalar() const
Definition: CGValue.h:52
clang::Attr
Attr - This represents one attribute.
Definition: Attr.h:45
clang::Decl::getLocation
SourceLocation getLocation() const
Definition: DeclBase.h:429
clang::CodeGen::CodeGenFunction::EmitNullInitialization
void EmitNullInitialization(Address DestPtr, QualType Ty)
EmitNullInitialization - Generate code to set a value of the given type to null, If the type contains...
Definition: CodeGenFunction.cpp:1723
clang::Expr::IgnoreParens
Expr * IgnoreParens() LLVM_READONLY
Skip past any parentheses which might surround this expression until reaching a fixed point...
Definition: Expr.cpp:2986
clang::LangOptions::FPE_MayTrap
Transformations do not cause new exceptions but may hide some.
Definition: LangOptions.h:216
clang::ASTContext::getSizeType
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
Definition: ASTContext.cpp:5254