clang 10.0.0git

CGExprAgg.cpp
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1 //===--- CGExprAgg.cpp - Emit LLVM Code from Aggregate Expressions --------===//
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 contains code to emit Aggregate Expr nodes as LLVM code.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "CGCXXABI.h"
14 #include "CGObjCRuntime.h"
15 #include "CodeGenFunction.h"
16 #include "CodeGenModule.h"
17 #include "ConstantEmitter.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/Attr.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclTemplate.h"
22 #include "clang/AST/StmtVisitor.h"
23 #include "llvm/IR/Constants.h"
24 #include "llvm/IR/Function.h"
25 #include "llvm/IR/GlobalVariable.h"
26 #include "llvm/IR/IntrinsicInst.h"
27 #include "llvm/IR/Intrinsics.h"
28 using namespace clang;
29 using namespace CodeGen;
30
31 //===----------------------------------------------------------------------===//
32 // Aggregate Expression Emitter
33 //===----------------------------------------------------------------------===//
34
35 namespace {
36 class AggExprEmitter : public StmtVisitor<AggExprEmitter> {
37 CodeGenFunction &CGF;
38 CGBuilderTy &Builder;
39 AggValueSlot Dest;
40 bool IsResultUnused;
41
42 AggValueSlot EnsureSlot(QualType T) {
43 if (!Dest.isIgnored()) return Dest;
44 return CGF.CreateAggTemp(T, "agg.tmp.ensured");
45 }
46 void EnsureDest(QualType T) {
47 if (!Dest.isIgnored()) return;
48 Dest = CGF.CreateAggTemp(T, "agg.tmp.ensured");
49 }
50
51 // Calls `Fn` with a valid return value slot, potentially creating a temporary
52 // to do so. If a temporary is created, an appropriate copy into `Dest` will
53 // be emitted, as will lifetime markers.
54 //
55 // The given function should take a ReturnValueSlot, and return an RValue that
56 // points to said slot.
57 void withReturnValueSlot(const Expr *E,
58 llvm::function_ref<RValue(ReturnValueSlot)> Fn);
59
60 public:
61 AggExprEmitter(CodeGenFunction &cgf, AggValueSlot Dest, bool IsResultUnused)
62 : CGF(cgf), Builder(CGF.Builder), Dest(Dest),
63 IsResultUnused(IsResultUnused) { }
64
65 //===--------------------------------------------------------------------===//
66 // Utilities
67 //===--------------------------------------------------------------------===//
68
69 /// EmitAggLoadOfLValue - Given an expression with aggregate type that
70 /// represents a value lvalue, this method emits the address of the lvalue,
71 /// then loads the result into DestPtr.
72 void EmitAggLoadOfLValue(const Expr *E);
73
74 enum ExprValueKind {
75 EVK_RValue,
76 EVK_NonRValue
77 };
78
79 /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired.
80 /// SrcIsRValue is true if source comes from an RValue.
81 void EmitFinalDestCopy(QualType type, const LValue &src,
82 ExprValueKind SrcValueKind = EVK_NonRValue);
83 void EmitFinalDestCopy(QualType type, RValue src);
84 void EmitCopy(QualType type, const AggValueSlot &dest,
85 const AggValueSlot &src);
86
87 void EmitMoveFromReturnSlot(const Expr *E, RValue Src);
88
89 void EmitArrayInit(Address DestPtr, llvm::ArrayType *AType,
90 QualType ArrayQTy, InitListExpr *E);
91
92 AggValueSlot::NeedsGCBarriers_t needsGC(QualType T) {
93 if (CGF.getLangOpts().getGC() && TypeRequiresGCollection(T))
94 return AggValueSlot::NeedsGCBarriers;
95 return AggValueSlot::DoesNotNeedGCBarriers;
96 }
97
98 bool TypeRequiresGCollection(QualType T);
99
100 //===--------------------------------------------------------------------===//
101 // Visitor Methods
102 //===--------------------------------------------------------------------===//
103
104 void Visit(Expr *E) {
105 ApplyDebugLocation DL(CGF, E);
106 StmtVisitor<AggExprEmitter>::Visit(E);
107 }
108
109 void VisitStmt(Stmt *S) {
110 CGF.ErrorUnsupported(S, "aggregate expression");
111 }
112 void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); }
113 void VisitGenericSelectionExpr(GenericSelectionExpr *GE) {
114 Visit(GE->getResultExpr());
115 }
116 void VisitCoawaitExpr(CoawaitExpr *E) {
117 CGF.EmitCoawaitExpr(*E, Dest, IsResultUnused);
118 }
119 void VisitCoyieldExpr(CoyieldExpr *E) {
120 CGF.EmitCoyieldExpr(*E, Dest, IsResultUnused);
121 }
122 void VisitUnaryCoawait(UnaryOperator *E) { Visit(E->getSubExpr()); }
123 void VisitUnaryExtension(UnaryOperator *E) { Visit(E->getSubExpr()); }
124 void VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E) {
125 return Visit(E->getReplacement());
126 }
127
128 void VisitConstantExpr(ConstantExpr *E) {
129 return Visit(E->getSubExpr());
130 }
131
132 // l-values.
133 void VisitDeclRefExpr(DeclRefExpr *E) { EmitAggLoadOfLValue(E); }
134 void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); }
135 void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); }
136 void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); }
137 void VisitCompoundLiteralExpr(CompoundLiteralExpr *E);
138 void VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
139 EmitAggLoadOfLValue(E);
140 }
141 void VisitPredefinedExpr(const PredefinedExpr *E) {
142 EmitAggLoadOfLValue(E);
143 }
144
145 // Operators.
146 void VisitCastExpr(CastExpr *E);
147 void VisitCallExpr(const CallExpr *E);
148 void VisitStmtExpr(const StmtExpr *E);
149 void VisitBinaryOperator(const BinaryOperator *BO);
150 void VisitPointerToDataMemberBinaryOperator(const BinaryOperator *BO);
151 void VisitBinAssign(const BinaryOperator *E);
152 void VisitBinComma(const BinaryOperator *E);
153 void VisitBinCmp(const BinaryOperator *E);
154 void VisitCXXRewrittenBinaryOperator(CXXRewrittenBinaryOperator *E) {
155 Visit(E->getSemanticForm());
156 }
157
158 void VisitObjCMessageExpr(ObjCMessageExpr *E);
159 void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
160 EmitAggLoadOfLValue(E);
161 }
162
163 void VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E);
164 void VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO);
165 void VisitChooseExpr(const ChooseExpr *CE);
166 void VisitInitListExpr(InitListExpr *E);
167 void VisitArrayInitLoopExpr(const ArrayInitLoopExpr *E,
168 llvm::Value *outerBegin = nullptr);
169 void VisitImplicitValueInitExpr(ImplicitValueInitExpr *E);
170 void VisitNoInitExpr(NoInitExpr *E) { } // Do nothing.
171 void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) {
172 CodeGenFunction::CXXDefaultArgExprScope Scope(CGF, DAE);
173 Visit(DAE->getExpr());
174 }
175 void VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) {
176 CodeGenFunction::CXXDefaultInitExprScope Scope(CGF, DIE);
177 Visit(DIE->getExpr());
178 }
179 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E);
180 void VisitCXXConstructExpr(const CXXConstructExpr *E);
181 void VisitCXXInheritedCtorInitExpr(const CXXInheritedCtorInitExpr *E);
182 void VisitLambdaExpr(LambdaExpr *E);
183 void VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E);
184 void VisitExprWithCleanups(ExprWithCleanups *E);
185 void VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E);
186 void VisitCXXTypeidExpr(CXXTypeidExpr *E) { EmitAggLoadOfLValue(E); }
187 void VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E);
188 void VisitOpaqueValueExpr(OpaqueValueExpr *E);
189
190 void VisitPseudoObjectExpr(PseudoObjectExpr *E) {
191 if (E->isGLValue()) {
192 LValue LV = CGF.EmitPseudoObjectLValue(E);
193 return EmitFinalDestCopy(E->getType(), LV);
194 }
195
196 CGF.EmitPseudoObjectRValue(E, EnsureSlot(E->getType()));
197 }
198
199 void VisitVAArgExpr(VAArgExpr *E);
200
201 void EmitInitializationToLValue(Expr *E, LValue Address);
202 void EmitNullInitializationToLValue(LValue Address);
203 // case Expr::ChooseExprClass:
204 void VisitCXXThrowExpr(const CXXThrowExpr *E) { CGF.EmitCXXThrowExpr(E); }
205 void VisitAtomicExpr(AtomicExpr *E) {
206 RValue Res = CGF.EmitAtomicExpr(E);
207 EmitFinalDestCopy(E->getType(), Res);
208 }
209 };
210 } // end anonymous namespace.
211
212 //===----------------------------------------------------------------------===//
213 // Utilities
214 //===----------------------------------------------------------------------===//
215
216 /// EmitAggLoadOfLValue - Given an expression with aggregate type that
217 /// represents a value lvalue, this method emits the address of the lvalue,
218 /// then loads the result into DestPtr.
219 void AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) {
220 LValue LV = CGF.EmitLValue(E);
221
222 // If the type of the l-value is atomic, then do an atomic load.
223 if (LV.getType()->isAtomicType() || CGF.LValueIsSuitableForInlineAtomic(LV)) {
224 CGF.EmitAtomicLoad(LV, E->getExprLoc(), Dest);
225 return;
226 }
227
228 EmitFinalDestCopy(E->getType(), LV);
229 }
230
231 /// True if the given aggregate type requires special GC API calls.
232 bool AggExprEmitter::TypeRequiresGCollection(QualType T) {
233 // Only record types have members that might require garbage collection.
234 const RecordType *RecordTy = T->getAs<RecordType>();
235 if (!RecordTy) return false;
236
237 // Don't mess with non-trivial C++ types.
238 RecordDecl *Record = RecordTy->getDecl();
239 if (isa<CXXRecordDecl>(Record) &&
240 (cast<CXXRecordDecl>(Record)->hasNonTrivialCopyConstructor() ||
241 !cast<CXXRecordDecl>(Record)->hasTrivialDestructor()))
242 return false;
243
244 // Check whether the type has an object member.
245 return Record->hasObjectMember();
246 }
247
248 void AggExprEmitter::withReturnValueSlot(
249 const Expr *E, llvm::function_ref<RValue(ReturnValueSlot)> EmitCall) {
250 QualType RetTy = E->getType();
251 bool RequiresDestruction =
252 Dest.isIgnored() &&
253 RetTy.isDestructedType() == QualType::DK_nontrivial_c_struct;
254
255 // If it makes no observable difference, save a memcpy + temporary.
256 //
257 // We need to always provide our own temporary if destruction is required.
258 // Otherwise, EmitCall will emit its own, notice that it's "unused", and end
259 // its lifetime before we have the chance to emit a proper destructor call.
260 bool UseTemp = Dest.isPotentiallyAliased() || Dest.requiresGCollection() ||
261 (RequiresDestruction && !Dest.getAddress().isValid());
262
263 Address RetAddr = Address::invalid();
264 Address RetAllocaAddr = Address::invalid();
265
266 EHScopeStack::stable_iterator LifetimeEndBlock;
267 llvm::Value *LifetimeSizePtr = nullptr;
268 llvm::IntrinsicInst *LifetimeStartInst = nullptr;
269 if (!UseTemp) {
270 RetAddr = Dest.getAddress();
271 } else {
272 RetAddr = CGF.CreateMemTemp(RetTy, "tmp", &RetAllocaAddr);
273 uint64_t Size =
274 CGF.CGM.getDataLayout().getTypeAllocSize(CGF.ConvertTypeForMem(RetTy));
275 LifetimeSizePtr = CGF.EmitLifetimeStart(Size, RetAllocaAddr.getPointer());
276 if (LifetimeSizePtr) {
277 LifetimeStartInst =
278 cast<llvm::IntrinsicInst>(std::prev(Builder.GetInsertPoint()));
279 assert(LifetimeStartInst->getIntrinsicID() ==
280 llvm::Intrinsic::lifetime_start &&
281 "Last insertion wasn't a lifetime.start?");
282
283 CGF.pushFullExprCleanup<CodeGenFunction::CallLifetimeEnd>(
284 NormalEHLifetimeMarker, RetAllocaAddr, LifetimeSizePtr);
285 LifetimeEndBlock = CGF.EHStack.stable_begin();
286 }
287 }
288
289 RValue Src =
290 EmitCall(ReturnValueSlot(RetAddr, Dest.isVolatile(), IsResultUnused));
291
292 if (RequiresDestruction)
293 CGF.pushDestroy(RetTy.isDestructedType(), Src.getAggregateAddress(), RetTy);
294
295 if (!UseTemp)
296 return;
297
298 assert(Dest.getPointer() != Src.getAggregatePointer());
299 EmitFinalDestCopy(E->getType(), Src);
300
301 if (!RequiresDestruction && LifetimeStartInst) {
302 // If there's no dtor to run, the copy was the last use of our temporary.
303 // Since we're not guaranteed to be in an ExprWithCleanups, clean up
304 // eagerly.
305 CGF.DeactivateCleanupBlock(LifetimeEndBlock, LifetimeStartInst);
306 CGF.EmitLifetimeEnd(LifetimeSizePtr, RetAllocaAddr.getPointer());
307 }
308 }
309
310 /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired.
311 void AggExprEmitter::EmitFinalDestCopy(QualType type, RValue src) {
312 assert(src.isAggregate() && "value must be aggregate value!");
313 LValue srcLV = CGF.MakeAddrLValue(src.getAggregateAddress(), type);
314 EmitFinalDestCopy(type, srcLV, EVK_RValue);
315 }
316
317 /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired.
318 void AggExprEmitter::EmitFinalDestCopy(QualType type, const LValue &src,
319 ExprValueKind SrcValueKind) {
320 // If Dest is ignored, then we're evaluating an aggregate expression
321 // in a context that doesn't care about the result. Note that loads
322 // from volatile l-values force the existence of a non-ignored
323 // destination.
324 if (Dest.isIgnored())
325 return;
326
327 // Copy non-trivial C structs here.
328 LValue DstLV = CGF.MakeAddrLValue(
329 Dest.getAddress(), Dest.isVolatile() ? type.withVolatile() : type);
330
331 if (SrcValueKind == EVK_RValue) {
332 if (type.isNonTrivialToPrimitiveDestructiveMove() == QualType::PCK_Struct) {
333 if (Dest.isPotentiallyAliased())
334 CGF.callCStructMoveAssignmentOperator(DstLV, src);
335 else
336 CGF.callCStructMoveConstructor(DstLV, src);
337 return;
338 }
339 } else {
340 if (type.isNonTrivialToPrimitiveCopy() == QualType::PCK_Struct) {
341 if (Dest.isPotentiallyAliased())
342 CGF.callCStructCopyAssignmentOperator(DstLV, src);
343 else
344 CGF.callCStructCopyConstructor(DstLV, src);
345 return;
346 }
347 }
348
349 AggValueSlot srcAgg = AggValueSlot::forLValue(
350 src, CGF, AggValueSlot::IsDestructed, needsGC(type),
351 AggValueSlot::IsAliased, AggValueSlot::MayOverlap);
352 EmitCopy(type, Dest, srcAgg);
353 }
354
355 /// Perform a copy from the source into the destination.
356 ///
357 /// \param type - the type of the aggregate being copied; qualifiers are
358 /// ignored
359 void AggExprEmitter::EmitCopy(QualType type, const AggValueSlot &dest,
360 const AggValueSlot &src) {
361 if (dest.requiresGCollection()) {
362 CharUnits sz = dest.getPreferredSize(CGF.getContext(), type);
363 llvm::Value *size = llvm::ConstantInt::get(CGF.SizeTy, sz.getQuantity());
364 CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF,
365 dest.getAddress(),
366 src.getAddress(),
367 size);
368 return;
369 }
370
371 // If the result of the assignment is used, copy the LHS there also.
372 // It's volatile if either side is. Use the minimum alignment of
373 // the two sides.
374 LValue DestLV = CGF.MakeAddrLValue(dest.getAddress(), type);
375 LValue SrcLV = CGF.MakeAddrLValue(src.getAddress(), type);
376 CGF.EmitAggregateCopy(DestLV, SrcLV, type, dest.mayOverlap(),
377 dest.isVolatile() || src.isVolatile());
378 }
379
380 /// Emit the initializer for a std::initializer_list initialized with a
381 /// real initializer list.
382 void
383 AggExprEmitter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
384 // Emit an array containing the elements. The array is externally destructed
385 // if the std::initializer_list object is.
386 ASTContext &Ctx = CGF.getContext();
387 LValue Array = CGF.EmitLValue(E->getSubExpr());
388 assert(Array.isSimple() && "initializer_list array not a simple lvalue");
389 Address ArrayPtr = Array.getAddress(CGF);
390
391 const ConstantArrayType *ArrayType =
392 Ctx.getAsConstantArrayType(E->getSubExpr()->getType());
393 assert(ArrayType && "std::initializer_list constructed from non-array");
394
395 // FIXME: Perform the checks on the field types in SemaInit.
396 RecordDecl *Record = E->getType()->castAs<RecordType>()->getDecl();
397 RecordDecl::field_iterator Field = Record->field_begin();
398 if (Field == Record->field_end()) {
399 CGF.ErrorUnsupported(E, "weird std::initializer_list");
400 return;
401 }
402
403 // Start pointer.
404 if (!Field->getType()->isPointerType() ||
405 !Ctx.hasSameType(Field->getType()->getPointeeType(),
406 ArrayType->getElementType())) {
407 CGF.ErrorUnsupported(E, "weird std::initializer_list");
408 return;
409 }
410
411 AggValueSlot Dest = EnsureSlot(E->getType());
412 LValue DestLV = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
413 LValue Start = CGF.EmitLValueForFieldInitialization(DestLV, *Field);
414 llvm::Value *Zero = llvm::ConstantInt::get(CGF.PtrDiffTy, 0);
415 llvm::Value *IdxStart[] = { Zero, Zero };
416 llvm::Value *ArrayStart =
417 Builder.CreateInBoundsGEP(ArrayPtr.getPointer(), IdxStart, "arraystart");
418 CGF.EmitStoreThroughLValue(RValue::get(ArrayStart), Start);
419 ++Field;
420
421 if (Field == Record->field_end()) {
422 CGF.ErrorUnsupported(E, "weird std::initializer_list");
423 return;
424 }
425
426 llvm::Value *Size = Builder.getInt(ArrayType->getSize());
427 LValue EndOrLength = CGF.EmitLValueForFieldInitialization(DestLV, *Field);
428 if (Field->getType()->isPointerType() &&
429 Ctx.hasSameType(Field->getType()->getPointeeType(),
430 ArrayType->getElementType())) {
431 // End pointer.
432 llvm::Value *IdxEnd[] = { Zero, Size };
433 llvm::Value *ArrayEnd =
434 Builder.CreateInBoundsGEP(ArrayPtr.getPointer(), IdxEnd, "arrayend");
435 CGF.EmitStoreThroughLValue(RValue::get(ArrayEnd), EndOrLength);
436 } else if (Ctx.hasSameType(Field->getType(), Ctx.getSizeType())) {
437 // Length.
438 CGF.EmitStoreThroughLValue(RValue::get(Size), EndOrLength);
439 } else {
440 CGF.ErrorUnsupported(E, "weird std::initializer_list");
441 return;
442 }
443 }
444
445 /// Determine if E is a trivial array filler, that is, one that is
446 /// equivalent to zero-initialization.
447 static bool isTrivialFiller(Expr *E) {
448 if (!E)
449 return true;
450
451 if (isa<ImplicitValueInitExpr>(E))
452 return true;
453
454 if (auto *ILE = dyn_cast<InitListExpr>(E)) {
455 if (ILE->getNumInits())
456 return false;
457 return isTrivialFiller(ILE->getArrayFiller());
458 }
459
460 if (auto *Cons = dyn_cast_or_null<CXXConstructExpr>(E))
461 return Cons->getConstructor()->isDefaultConstructor() &&
462 Cons->getConstructor()->isTrivial();
463
464 // FIXME: Are there other cases where we can avoid emitting an initializer?
465 return false;
466 }
467
468 /// Emit initialization of an array from an initializer list.
469 void AggExprEmitter::EmitArrayInit(Address DestPtr, llvm::ArrayType *AType,
470 QualType ArrayQTy, InitListExpr *E) {
471 uint64_t NumInitElements = E->getNumInits();
472
473 uint64_t NumArrayElements = AType->getNumElements();
474 assert(NumInitElements <= NumArrayElements);
475
476 QualType elementType =
477 CGF.getContext().getAsArrayType(ArrayQTy)->getElementType();
478
479 // DestPtr is an array*. Construct an elementType* by drilling
480 // down a level.
481 llvm::Value *zero = llvm::ConstantInt::get(CGF.SizeTy, 0);
482 llvm::Value *indices[] = { zero, zero };
483 llvm::Value *begin =
484 Builder.CreateInBoundsGEP(DestPtr.getPointer(), indices, "arrayinit.begin");
485
486 CharUnits elementSize = CGF.getContext().getTypeSizeInChars(elementType);
487 CharUnits elementAlign =
488 DestPtr.getAlignment().alignmentOfArrayElement(elementSize);
489
490 // Consider initializing the array by copying from a global. For this to be
491 // more efficient than per-element initialization, the size of the elements
492 // with explicit initializers should be large enough.
493 if (NumInitElements * elementSize.getQuantity() > 16 &&
494 elementType.isTriviallyCopyableType(CGF.getContext())) {
495 CodeGen::CodeGenModule &CGM = CGF.CGM;
496 ConstantEmitter Emitter(CGF);
497 LangAS AS = ArrayQTy.getAddressSpace();
498 if (llvm::Constant *C = Emitter.tryEmitForInitializer(E, AS, ArrayQTy)) {
499 auto GV = new llvm::GlobalVariable(
500 CGM.getModule(), C->getType(),
501 CGM.isTypeConstant(ArrayQTy, /* ExcludeCtorDtor= */ true),
502 llvm::GlobalValue::PrivateLinkage, C, "constinit",
503 /* InsertBefore= */ nullptr, llvm::GlobalVariable::NotThreadLocal,
504 CGM.getContext().getTargetAddressSpace(AS));
505 Emitter.finalize(GV);
506 CharUnits Align = CGM.getContext().getTypeAlignInChars(ArrayQTy);
507 GV->setAlignment(Align.getAsAlign());
508 EmitFinalDestCopy(ArrayQTy, CGF.MakeAddrLValue(GV, ArrayQTy, Align));
509 return;
510 }
511 }
512
513 // Exception safety requires us to destroy all the
514 // already-constructed members if an initializer throws.
515 // For that, we'll need an EH cleanup.
516 QualType::DestructionKind dtorKind = elementType.isDestructedType();
517 Address endOfInit = Address::invalid();
518 EHScopeStack::stable_iterator cleanup;
519 llvm::Instruction *cleanupDominator = nullptr;
520 if (CGF.needsEHCleanup(dtorKind)) {
521 // In principle we could tell the cleanup where we are more
522 // directly, but the control flow can get so varied here that it
523 // would actually be quite complex. Therefore we go through an
524 // alloca.
525 endOfInit = CGF.CreateTempAlloca(begin->getType(), CGF.getPointerAlign(),
526 "arrayinit.endOfInit");
527 cleanupDominator = Builder.CreateStore(begin, endOfInit);
528 CGF.pushIrregularPartialArrayCleanup(begin, endOfInit, elementType,
529 elementAlign,
530 CGF.getDestroyer(dtorKind));
531 cleanup = CGF.EHStack.stable_begin();
532
533 // Otherwise, remember that we didn't need a cleanup.
534 } else {
535 dtorKind = QualType::DK_none;
536 }
537
538 llvm::Value *one = llvm::ConstantInt::get(CGF.SizeTy, 1);
539
540 // The 'current element to initialize'. The invariants on this
541 // variable are complicated. Essentially, after each iteration of
542 // the loop, it points to the last initialized element, except
543 // that it points to the beginning of the array before any
544 // elements have been initialized.
545 llvm::Value *element = begin;
546
547 // Emit the explicit initializers.
548 for (uint64_t i = 0; i != NumInitElements; ++i) {
549 // Advance to the next element.
550 if (i > 0) {
551 element = Builder.CreateInBoundsGEP(element, one, "arrayinit.element");
552
553 // Tell the cleanup that it needs to destroy up to this
554 // element. TODO: some of these stores can be trivially
555 // observed to be unnecessary.
556 if (endOfInit.isValid()) Builder.CreateStore(element, endOfInit);
557 }
558
559 LValue elementLV =
560 CGF.MakeAddrLValue(Address(element, elementAlign), elementType);
561 EmitInitializationToLValue(E->getInit(i), elementLV);
562 }
563
564 // Check whether there's a non-trivial array-fill expression.
565 Expr *filler = E->getArrayFiller();
566 bool hasTrivialFiller = isTrivialFiller(filler);
567
568 // Any remaining elements need to be zero-initialized, possibly
569 // using the filler expression. We can skip this if the we're
570 // emitting to zeroed memory.
571 if (NumInitElements != NumArrayElements &&
572 !(Dest.isZeroed() && hasTrivialFiller &&
573 CGF.getTypes().isZeroInitializable(elementType))) {
574
575 // Use an actual loop. This is basically
576 // do { *array++ = filler; } while (array != end);
577
578 // Advance to the start of the rest of the array.
579 if (NumInitElements) {
580 element = Builder.CreateInBoundsGEP(element, one, "arrayinit.start");
581 if (endOfInit.isValid()) Builder.CreateStore(element, endOfInit);
582 }
583
584 // Compute the end of the array.
585 llvm::Value *end = Builder.CreateInBoundsGEP(begin,
586 llvm::ConstantInt::get(CGF.SizeTy, NumArrayElements),
587 "arrayinit.end");
588
589 llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
590 llvm::BasicBlock *bodyBB = CGF.createBasicBlock("arrayinit.body");
591
592 // Jump into the body.
593 CGF.EmitBlock(bodyBB);
594 llvm::PHINode *currentElement =
595 Builder.CreatePHI(element->getType(), 2, "arrayinit.cur");
596 currentElement->addIncoming(element, entryBB);
597
598 // Emit the actual filler expression.
599 {
600 // C++1z [class.temporary]p5:
601 // when a default constructor is called to initialize an element of
602 // an array with no corresponding initializer [...] the destruction of
603 // every temporary created in a default argument is sequenced before
604 // the construction of the next array element, if any
605 CodeGenFunction::RunCleanupsScope CleanupsScope(CGF);
606 LValue elementLV =
607 CGF.MakeAddrLValue(Address(currentElement, elementAlign), elementType);
608 if (filler)
609 EmitInitializationToLValue(filler, elementLV);
610 else
611 EmitNullInitializationToLValue(elementLV);
612 }
613
614 // Move on to the next element.
615 llvm::Value *nextElement =
616 Builder.CreateInBoundsGEP(currentElement, one, "arrayinit.next");
617
618 // Tell the EH cleanup that we finished with the last element.
619 if (endOfInit.isValid()) Builder.CreateStore(nextElement, endOfInit);
620
621 // Leave the loop if we're done.
622 llvm::Value *done = Builder.CreateICmpEQ(nextElement, end,
623 "arrayinit.done");
624 llvm::BasicBlock *endBB = CGF.createBasicBlock("arrayinit.end");
625 Builder.CreateCondBr(done, endBB, bodyBB);
626 currentElement->addIncoming(nextElement, Builder.GetInsertBlock());
627
628 CGF.EmitBlock(endBB);
629 }
630
631 // Leave the partial-array cleanup if we entered one.
632 if (dtorKind) CGF.DeactivateCleanupBlock(cleanup, cleanupDominator);
633 }
634
635 //===----------------------------------------------------------------------===//
636 // Visitor Methods
637 //===----------------------------------------------------------------------===//
638
639 void AggExprEmitter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E){
640 Visit(E->getSubExpr());
641 }
642
643 void AggExprEmitter::VisitOpaqueValueExpr(OpaqueValueExpr *e) {
644 // If this is a unique OVE, just visit its source expression.
645 if (e->isUnique())
646 Visit(e->getSourceExpr());
647 else
648 EmitFinalDestCopy(e->getType(), CGF.getOrCreateOpaqueLValueMapping(e));
649 }
650
651 void
652 AggExprEmitter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
653 if (Dest.isPotentiallyAliased() &&
654 E->getType().isPODType(CGF.getContext())) {
655 // For a POD type, just emit a load of the lvalue + a copy, because our
656 // compound literal might alias the destination.
657 EmitAggLoadOfLValue(E);
658 return;
659 }
660
661 AggValueSlot Slot = EnsureSlot(E->getType());
662 CGF.EmitAggExpr(E->getInitializer(), Slot);
663 }
664
665 /// Attempt to look through various unimportant expressions to find a
666 /// cast of the given kind.
667 static Expr *findPeephole(Expr *op, CastKind kind) {
668 while (true) {
669 op = op->IgnoreParens();
670 if (CastExpr *castE = dyn_cast<CastExpr>(op)) {
671 if (castE->getCastKind() == kind)
672 return castE->getSubExpr();
673 if (castE->getCastKind() == CK_NoOp)
674 continue;
675 }
676 return nullptr;
677 }
678 }
679
680 void AggExprEmitter::VisitCastExpr(CastExpr *E) {
681 if (const auto *ECE = dyn_cast<ExplicitCastExpr>(E))
682 CGF.CGM.EmitExplicitCastExprType(ECE, &CGF);
683 switch (E->getCastKind()) {
684 case CK_Dynamic: {
685 // FIXME: Can this actually happen? We have no test coverage for it.
686 assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?");
687 LValue LV = CGF.EmitCheckedLValue(E->getSubExpr(),
688 CodeGenFunction::TCK_Load);
689 // FIXME: Do we also need to handle property references here?
690 if (LV.isSimple())
691 CGF.EmitDynamicCast(LV.getAddress(CGF), cast<CXXDynamicCastExpr>(E));
692 else
693 CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast");
694
695 if (!Dest.isIgnored())
696 CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination");
697 break;
698 }
699
700 case CK_ToUnion: {
701 // Evaluate even if the destination is ignored.
702 if (Dest.isIgnored()) {
703 CGF.EmitAnyExpr(E->getSubExpr(), AggValueSlot::ignored(),
704 /*ignoreResult=*/true);
705 break;
706 }
707
708 // GCC union extension
709 QualType Ty = E->getSubExpr()->getType();
710 Address CastPtr =
711 Builder.CreateElementBitCast(Dest.getAddress(), CGF.ConvertType(Ty));
712 EmitInitializationToLValue(E->getSubExpr(),
713 CGF.MakeAddrLValue(CastPtr, Ty));
714 break;
715 }
716
717 case CK_LValueToRValueBitCast: {
718 if (Dest.isIgnored()) {
719 CGF.EmitAnyExpr(E->getSubExpr(), AggValueSlot::ignored(),
720 /*ignoreResult=*/true);
721 break;
722 }
723
724 LValue SourceLV = CGF.EmitLValue(E->getSubExpr());
725 Address SourceAddress =
726 Builder.CreateElementBitCast(SourceLV.getAddress(CGF), CGF.Int8Ty);
727 Address DestAddress =
728 Builder.CreateElementBitCast(Dest.getAddress(), CGF.Int8Ty);
729 llvm::Value *SizeVal = llvm::ConstantInt::get(
730 CGF.SizeTy,
731 CGF.getContext().getTypeSizeInChars(E->getType()).getQuantity());
732 Builder.CreateMemCpy(DestAddress, SourceAddress, SizeVal);
733 break;
734 }
735
736 case CK_DerivedToBase:
737 case CK_BaseToDerived:
738 case CK_UncheckedDerivedToBase: {
739 llvm_unreachable("cannot perform hierarchy conversion in EmitAggExpr: "
740 "should have been unpacked before we got here");
741 }
742
743 case CK_NonAtomicToAtomic:
744 case CK_AtomicToNonAtomic: {
745 bool isToAtomic = (E->getCastKind() == CK_NonAtomicToAtomic);
746
747 // Determine the atomic and value types.
748 QualType atomicType = E->getSubExpr()->getType();
749 QualType valueType = E->getType();
750 if (isToAtomic) std::swap(atomicType, valueType);
751
752 assert(atomicType->isAtomicType());
753 assert(CGF.getContext().hasSameUnqualifiedType(valueType,
754 atomicType->castAs<AtomicType>()->getValueType()));
755
756 // Just recurse normally if we're ignoring the result or the
757 // atomic type doesn't change representation.
758 if (Dest.isIgnored() || !CGF.CGM.isPaddedAtomicType(atomicType)) {
759 return Visit(E->getSubExpr());
760 }
761
762 CastKind peepholeTarget =
763 (isToAtomic ? CK_AtomicToNonAtomic : CK_NonAtomicToAtomic);
764
765 // These two cases are reverses of each other; try to peephole them.
766 if (Expr *op = findPeephole(E->getSubExpr(), peepholeTarget)) {
767 assert(CGF.getContext().hasSameUnqualifiedType(op->getType(),
768 E->getType()) &&
769 "peephole significantly changed types?");
770 return Visit(op);
771 }
772
773 // If we're converting an r-value of non-atomic type to an r-value
774 // of atomic type, just emit directly into the relevant sub-object.
775 if (isToAtomic) {
776 AggValueSlot valueDest = Dest;
777 if (!valueDest.isIgnored() && CGF.CGM.isPaddedAtomicType(atomicType)) {
778 // Zero-initialize. (Strictly speaking, we only need to initialize
779 // the padding at the end, but this is simpler.)
780 if (!Dest.isZeroed())
781 CGF.EmitNullInitialization(Dest.getAddress(), atomicType);
782
783 // Build a GEP to refer to the subobject.
784 Address valueAddr =
785 CGF.Builder.CreateStructGEP(valueDest.getAddress(), 0);
786 valueDest = AggValueSlot::forAddr(valueAddr,
787 valueDest.getQualifiers(),
788 valueDest.isExternallyDestructed(),
789 valueDest.requiresGCollection(),
790 valueDest.isPotentiallyAliased(),
791 AggValueSlot::DoesNotOverlap,
792 AggValueSlot::IsZeroed);
793 }
794
795 CGF.EmitAggExpr(E->getSubExpr(), valueDest);
796 return;
797 }
798
799 // Otherwise, we're converting an atomic type to a non-atomic type.
800 // Make an atomic temporary, emit into that, and then copy the value out.
801 AggValueSlot atomicSlot =
802 CGF.CreateAggTemp(atomicType, "atomic-to-nonatomic.temp");
803 CGF.EmitAggExpr(E->getSubExpr(), atomicSlot);
804
805 Address valueAddr = Builder.CreateStructGEP(atomicSlot.getAddress(), 0);
806 RValue rvalue = RValue::getAggregate(valueAddr, atomicSlot.isVolatile());
807 return EmitFinalDestCopy(valueType, rvalue);
808 }
809 case CK_AddressSpaceConversion:
810 return Visit(E->getSubExpr());
811
812 case CK_LValueToRValue:
813 // If we're loading from a volatile type, force the destination
814 // into existence.
815 if (E->getSubExpr()->getType().isVolatileQualified()) {
816 EnsureDest(E->getType());
817 return Visit(E->getSubExpr());
818 }
819
820 LLVM_FALLTHROUGH;
821
822
823 case CK_NoOp:
824 case CK_UserDefinedConversion:
825 case CK_ConstructorConversion:
826 assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(),
827 E->getType()) &&
828 "Implicit cast types must be compatible");
829 Visit(E->getSubExpr());
830 break;
831
832 case CK_LValueBitCast:
833 llvm_unreachable("should not be emitting lvalue bitcast as rvalue");
834
835 case CK_Dependent:
836 case CK_BitCast:
837 case CK_ArrayToPointerDecay:
838 case CK_FunctionToPointerDecay:
839 case CK_NullToPointer:
840 case CK_NullToMemberPointer:
841 case CK_BaseToDerivedMemberPointer:
842 case CK_DerivedToBaseMemberPointer:
843 case CK_MemberPointerToBoolean:
844 case CK_ReinterpretMemberPointer:
845 case CK_IntegralToPointer:
846 case CK_PointerToIntegral:
847 case CK_PointerToBoolean:
848 case CK_ToVoid:
849 case CK_VectorSplat:
850 case CK_IntegralCast:
851 case CK_BooleanToSignedIntegral:
852 case CK_IntegralToBoolean:
853 case CK_IntegralToFloating:
854 case CK_FloatingToIntegral:
855 case CK_FloatingToBoolean:
856 case CK_FloatingCast:
857 case CK_CPointerToObjCPointerCast:
858 case CK_BlockPointerToObjCPointerCast:
859 case CK_AnyPointerToBlockPointerCast:
860 case CK_ObjCObjectLValueCast:
861 case CK_FloatingRealToComplex:
862 case CK_FloatingComplexToReal:
863 case CK_FloatingComplexToBoolean:
864 case CK_FloatingComplexCast:
865 case CK_FloatingComplexToIntegralComplex:
866 case CK_IntegralRealToComplex:
867 case CK_IntegralComplexToReal:
868 case CK_IntegralComplexToBoolean:
869 case CK_IntegralComplexCast:
870 case CK_IntegralComplexToFloatingComplex:
871 case CK_ARCProduceObject:
872 case CK_ARCConsumeObject:
873 case CK_ARCReclaimReturnedObject:
874 case CK_ARCExtendBlockObject:
875 case CK_CopyAndAutoreleaseBlockObject:
876 case CK_BuiltinFnToFnPtr:
877 case CK_ZeroToOCLOpaqueType:
878
879 case CK_IntToOCLSampler:
880 case CK_FixedPointCast:
881 case CK_FixedPointToBoolean:
882 case CK_FixedPointToIntegral:
883 case CK_IntegralToFixedPoint:
884 llvm_unreachable("cast kind invalid for aggregate types");
885 }
886 }
887
888 void AggExprEmitter::VisitCallExpr(const CallExpr *E) {
889 if (E->getCallReturnType(CGF.getContext())->isReferenceType()) {
890 EmitAggLoadOfLValue(E);
891 return;
892 }
893
894 withReturnValueSlot(E, [&](ReturnValueSlot Slot) {
895 return CGF.EmitCallExpr(E, Slot);
896 });
897 }
898
899 void AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
900 withReturnValueSlot(E, [&](ReturnValueSlot Slot) {
901 return CGF.EmitObjCMessageExpr(E, Slot);
902 });
903 }
904
905 void AggExprEmitter::VisitBinComma(const BinaryOperator *E) {
906 CGF.EmitIgnoredExpr(E->getLHS());
907 Visit(E->getRHS());
908 }
909
910 void AggExprEmitter::VisitStmtExpr(const StmtExpr *E) {
911 CodeGenFunction::StmtExprEvaluation eval(CGF);
912 CGF.EmitCompoundStmt(*E->getSubStmt(), true, Dest);
913 }
914
915 enum CompareKind {
916 CK_Less,
917 CK_Greater,
918 CK_Equal,
919 };
920
921 static llvm::Value *EmitCompare(CGBuilderTy &Builder, CodeGenFunction &CGF,
922 const BinaryOperator *E, llvm::Value *LHS,
923 llvm::Value *RHS, CompareKind Kind,
924 const char *NameSuffix = "") {
925 QualType ArgTy = E->getLHS()->getType();
926 if (const ComplexType *CT = ArgTy->getAs<ComplexType>())
927 ArgTy = CT->getElementType();
928
929 if (const auto *MPT = ArgTy->getAs<MemberPointerType>()) {
930 assert(Kind == CK_Equal &&
931 "member pointers may only be compared for equality");
932 return CGF.CGM.getCXXABI().EmitMemberPointerComparison(
933 CGF, LHS, RHS, MPT, /*IsInequality*/ false);
934 }
935
936 // Compute the comparison instructions for the specified comparison kind.
937 struct CmpInstInfo {
938 const char *Name;
939 llvm::CmpInst::Predicate FCmp;
940 llvm::CmpInst::Predicate SCmp;
941 llvm::CmpInst::Predicate UCmp;
942 };
943 CmpInstInfo InstInfo = [&]() -> CmpInstInfo {
944 using FI = llvm::FCmpInst;
945 using II = llvm::ICmpInst;
946 switch (Kind) {
947 case CK_Less:
948 return {"cmp.lt", FI::FCMP_OLT, II::ICMP_SLT, II::ICMP_ULT};
949 case CK_Greater:
950 return {"cmp.gt", FI::FCMP_OGT, II::ICMP_SGT, II::ICMP_UGT};
951 case CK_Equal:
952 return {"cmp.eq", FI::FCMP_OEQ, II::ICMP_EQ, II::ICMP_EQ};
953 }
954 llvm_unreachable("Unrecognised CompareKind enum");
955 }();
956
957 if (ArgTy->hasFloatingRepresentation())
958 return Builder.CreateFCmp(InstInfo.FCmp, LHS, RHS,
959 llvm::Twine(InstInfo.Name) + NameSuffix);
960 if (ArgTy->isIntegralOrEnumerationType() || ArgTy->isPointerType()) {
961 auto Inst =
962 ArgTy->hasSignedIntegerRepresentation() ? InstInfo.SCmp : InstInfo.UCmp;
963 return Builder.CreateICmp(Inst, LHS, RHS,
964 llvm::Twine(InstInfo.Name) + NameSuffix);
965 }
966
967 llvm_unreachable("unsupported aggregate binary expression should have "
968 "already been handled");
969 }
970
971 void AggExprEmitter::VisitBinCmp(const BinaryOperator *E) {
972 using llvm::BasicBlock;
973 using llvm::PHINode;
974 using llvm::Value;
975 assert(CGF.getContext().hasSameType(E->getLHS()->getType(),
976 E->getRHS()->getType()));
977 const ComparisonCategoryInfo &CmpInfo =
978 CGF.getContext().CompCategories.getInfoForType(E->getType());
979 assert(CmpInfo.Record->isTriviallyCopyable() &&
980 "cannot copy non-trivially copyable aggregate");
981
982 QualType ArgTy = E->getLHS()->getType();
983
984 if (!ArgTy->isIntegralOrEnumerationType() && !ArgTy->isRealFloatingType() &&
985 !ArgTy->isNullPtrType() && !ArgTy->isPointerType() &&
986 !ArgTy->isMemberPointerType() && !ArgTy->isAnyComplexType()) {
987 return CGF.ErrorUnsupported(E, "aggregate three-way comparison");
988 }
989 bool IsComplex = ArgTy->isAnyComplexType();
990
991 // Evaluate the operands to the expression and extract their values.
992 auto EmitOperand = [&](Expr *E) -> std::pair<Value *, Value *> {
993 RValue RV = CGF.EmitAnyExpr(E);
994 if (RV.isScalar())
995 return {RV.getScalarVal(), nullptr};
996 if (RV.isAggregate())
997 return {RV.getAggregatePointer(), nullptr};
998 assert(RV.isComplex());
999 return RV.getComplexVal();
1000 };
1001 auto LHSValues = EmitOperand(E->getLHS()),
1002 RHSValues = EmitOperand(E->getRHS());
1003
1004 auto EmitCmp = [&](CompareKind K) {
1005 Value *Cmp = EmitCompare(Builder, CGF, E, LHSValues.first, RHSValues.first,
1006 K, IsComplex ? ".r" : "");
1007 if (!IsComplex)
1008 return Cmp;
1009 assert(K == CompareKind::CK_Equal);
1010 Value *CmpImag = EmitCompare(Builder, CGF, E, LHSValues.second,
1011 RHSValues.second, K, ".i");
1012 return Builder.CreateAnd(Cmp, CmpImag, "and.eq");
1013 };
1014 auto EmitCmpRes = [&](const ComparisonCategoryInfo::ValueInfo *VInfo) {
1015 return Builder.getInt(VInfo->getIntValue());
1016 };
1017
1018 Value *Select;
1019 if (ArgTy->isNullPtrType()) {
1020 Select = EmitCmpRes(CmpInfo.getEqualOrEquiv());
1021 } else if (!CmpInfo.isPartial()) {
1022 Value *SelectOne =
1023 Builder.CreateSelect(EmitCmp(CK_Less), EmitCmpRes(CmpInfo.getLess()),
1024 EmitCmpRes(CmpInfo.getGreater()), "sel.lt");
1025 Select = Builder.CreateSelect(EmitCmp(CK_Equal),
1026 EmitCmpRes(CmpInfo.getEqualOrEquiv()),
1027 SelectOne, "sel.eq");
1028 } else {
1029 Value *SelectEq = Builder.CreateSelect(
1030 EmitCmp(CK_Equal), EmitCmpRes(CmpInfo.getEqualOrEquiv()),
1031 EmitCmpRes(CmpInfo.getUnordered()), "sel.eq");
1032 Value *SelectGT = Builder.CreateSelect(EmitCmp(CK_Greater),
1033 EmitCmpRes(CmpInfo.getGreater()),
1034 SelectEq, "sel.gt");
1035 Select = Builder.CreateSelect(
1036 EmitCmp(CK_Less), EmitCmpRes(CmpInfo.getLess()), SelectGT, "sel.lt");
1037 }
1038 // Create the return value in the destination slot.
1039 EnsureDest(E->getType());
1040 LValue DestLV = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
1041
1042 // Emit the address of the first (and only) field in the comparison category
1043 // type, and initialize it from the constant integer value selected above.
1044 LValue FieldLV = CGF.EmitLValueForFieldInitialization(
1045 DestLV, *CmpInfo.Record->field_begin());
1046 CGF.EmitStoreThroughLValue(RValue::get(Select), FieldLV, /*IsInit*/ true);
1047
1048 // All done! The result is in the Dest slot.
1049 }
1050
1051 void AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) {
1052 if (E->getOpcode() == BO_PtrMemD || E->getOpcode() == BO_PtrMemI)
1053 VisitPointerToDataMemberBinaryOperator(E);
1054 else
1055 CGF.ErrorUnsupported(E, "aggregate binary expression");
1056 }
1057
1058 void AggExprEmitter::VisitPointerToDataMemberBinaryOperator(
1059 const BinaryOperator *E) {
1060 LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E);
1061 EmitFinalDestCopy(E->getType(), LV);
1062 }
1063
1064 /// Is the value of the given expression possibly a reference to or
1065 /// into a __block variable?
1066 static bool isBlockVarRef(const Expr *E) {
1067 // Make sure we look through parens.
1068 E = E->IgnoreParens();
1069
1070 // Check for a direct reference to a __block variable.
1071 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
1072 const VarDecl *var = dyn_cast<VarDecl>(DRE->getDecl());
1073 return (var && var->hasAttr<BlocksAttr>());
1074 }
1075
1076 // More complicated stuff.
1077
1078 // Binary operators.
1079 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(E)) {
1080 // For an assignment or pointer-to-member operation, just care
1081 // about the LHS.
1082 if (op->isAssignmentOp() || op->isPtrMemOp())
1083 return isBlockVarRef(op->getLHS());
1084
1085 // For a comma, just care about the RHS.
1086 if (op->getOpcode() == BO_Comma)
1087 return isBlockVarRef(op->getRHS());
1088
1089 // FIXME: pointer arithmetic?
1090 return false;
1091
1092 // Check both sides of a conditional operator.
1093 } else if (const AbstractConditionalOperator *op
1094 = dyn_cast<AbstractConditionalOperator>(E)) {
1095 return isBlockVarRef(op->getTrueExpr())
1096 || isBlockVarRef(op->getFalseExpr());
1097
1098 // OVEs are required to support BinaryConditionalOperators.
1099 } else if (const OpaqueValueExpr *op
1100 = dyn_cast<OpaqueValueExpr>(E)) {
1101 if (const Expr *src = op->getSourceExpr())
1102 return isBlockVarRef(src);
1103
1104 // Casts are necessary to get things like (*(int*)&var) = foo().
1105 // We don't really care about the kind of cast here, except
1106 // we don't want to look through l2r casts, because it's okay
1107 // to get the *value* in a __block variable.
1108 } else if (const CastExpr *cast = dyn_cast<CastExpr>(E)) {
1109 if (cast->getCastKind() == CK_LValueToRValue)
1110 return false;
1111 return isBlockVarRef(cast->getSubExpr());
1112
1113 // Handle unary operators. Again, just aggressively look through
1114 // it, ignoring the operation.
1115 } else if (const UnaryOperator *uop = dyn_cast<UnaryOperator>(E)) {
1116 return isBlockVarRef(uop->getSubExpr());
1117
1118 // Look into the base of a field access.
1119 } else if (const MemberExpr *mem = dyn_cast<MemberExpr>(E)) {
1120 return isBlockVarRef(mem->getBase());
1121
1122 // Look into the base of a subscript.
1123 } else if (const ArraySubscriptExpr *sub = dyn_cast<ArraySubscriptExpr>(E)) {
1124 return isBlockVarRef(sub->getBase());
1125 }
1126
1127 return false;
1128 }
1129
1130 void AggExprEmitter::VisitBinAssign(const BinaryOperator *E) {
1131 // For an assignment to work, the value on the right has
1132 // to be compatible with the value on the left.
1133 assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(),
1134 E->getRHS()->getType())
1135 && "Invalid assignment");
1136
1137 // If the LHS might be a __block variable, and the RHS can
1138 // potentially cause a block copy, we need to evaluate the RHS first
1139 // so that the assignment goes the right place.
1140 // This is pretty semantically fragile.
1141 if (isBlockVarRef(E->getLHS()) &&
1142 E->getRHS()->HasSideEffects(CGF.getContext())) {
1143 // Ensure that we have a destination, and evaluate the RHS into that.
1144 EnsureDest(E->getRHS()->getType());
1145 Visit(E->getRHS());
1146
1147 // Now emit the LHS and copy into it.
1148 LValue LHS = CGF.EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store);
1149
1150 // That copy is an atomic copy if the LHS is atomic.
1151 if (LHS.getType()->isAtomicType() ||
1152 CGF.LValueIsSuitableForInlineAtomic(LHS)) {
1153 CGF.EmitAtomicStore(Dest.asRValue(), LHS, /*isInit*/ false);
1154 return;
1155 }
1156
1157 EmitCopy(E->getLHS()->getType(),
1158 AggValueSlot::forLValue(LHS, CGF, AggValueSlot::IsDestructed,
1159 needsGC(E->getLHS()->getType()),
1160 AggValueSlot::IsAliased,
1161 AggValueSlot::MayOverlap),
1162 Dest);
1163 return;
1164 }
1165
1166 LValue LHS = CGF.EmitLValue(E->getLHS());
1167
1168 // If we have an atomic type, evaluate into the destination and then
1169 // do an atomic copy.
1170 if (LHS.getType()->isAtomicType() ||
1171 CGF.LValueIsSuitableForInlineAtomic(LHS)) {
1172 EnsureDest(E->getRHS()->getType());
1173 Visit(E->getRHS());
1174 CGF.EmitAtomicStore(Dest.asRValue(), LHS, /*isInit*/ false);
1175 return;
1176 }
1177
1178 // Codegen the RHS so that it stores directly into the LHS.
1179 AggValueSlot LHSSlot = AggValueSlot::forLValue(
1180 LHS, CGF, AggValueSlot::IsDestructed, needsGC(E->getLHS()->getType()),
1181 AggValueSlot::IsAliased, AggValueSlot::MayOverlap);
1182 // A non-volatile aggregate destination might have volatile member.
1183 if (!LHSSlot.isVolatile() &&
1184 CGF.hasVolatileMember(E->getLHS()->getType()))
1185 LHSSlot.setVolatile(true);
1186
1187 CGF.EmitAggExpr(E->getRHS(), LHSSlot);
1188
1189 // Copy into the destination if the assignment isn't ignored.
1190 EmitFinalDestCopy(E->getType(), LHS);
1191 }
1192
1193 void AggExprEmitter::
1194 VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) {
1195 llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
1196 llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
1197 llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
1198
1199 // Bind the common expression if necessary.
1200 CodeGenFunction::OpaqueValueMapping binding(CGF, E);
1201
1202 CodeGenFunction::ConditionalEvaluation eval(CGF);
1203 CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock,
1204 CGF.getProfileCount(E));
1205
1206 // Save whether the destination's lifetime is externally managed.
1207 bool isExternallyDestructed = Dest.isExternallyDestructed();
1208
1209 eval.begin(CGF);
1210 CGF.EmitBlock(LHSBlock);
1211 CGF.incrementProfileCounter(E);
1212 Visit(E->getTrueExpr());
1213 eval.end(CGF);
1214
1215 assert(CGF.HaveInsertPoint() && "expression evaluation ended with no IP!");
1216 CGF.Builder.CreateBr(ContBlock);
1217
1218 // If the result of an agg expression is unused, then the emission
1219 // of the LHS might need to create a destination slot. That's fine
1220 // with us, and we can safely emit the RHS into the same slot, but
1221 // we shouldn't claim that it's already being destructed.
1222 Dest.setExternallyDestructed(isExternallyDestructed);
1223
1224 eval.begin(CGF);
1225 CGF.EmitBlock(RHSBlock);
1226 Visit(E->getFalseExpr());
1227 eval.end(CGF);
1228
1229 CGF.EmitBlock(ContBlock);
1230 }
1231
1232 void AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) {
1233 Visit(CE->getChosenSubExpr());
1234 }
1235
1236 void AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) {
1237 Address ArgValue = Address::invalid();
1238 Address ArgPtr = CGF.EmitVAArg(VE, ArgValue);
1239
1240 // If EmitVAArg fails, emit an error.
1241 if (!ArgPtr.isValid()) {
1242 CGF.ErrorUnsupported(VE, "aggregate va_arg expression");
1243 return;
1244 }
1245
1246 EmitFinalDestCopy(VE->getType(), CGF.MakeAddrLValue(ArgPtr, VE->getType()));
1247 }
1248
1249 void AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1250 // Ensure that we have a slot, but if we already do, remember
1251 // whether it was externally destructed.
1252 bool wasExternallyDestructed = Dest.isExternallyDestructed();
1253 EnsureDest(E->getType());
1254
1255 // We're going to push a destructor if there isn't already one.
1256 Dest.setExternallyDestructed();
1257
1258 Visit(E->getSubExpr());
1259
1260 // Push that destructor we promised.
1261 if (!wasExternallyDestructed)
1262 CGF.EmitCXXTemporary(E->getTemporary(), E->getType(), Dest.getAddress());
1263 }
1264
1265 void
1266 AggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) {
1267 AggValueSlot Slot = EnsureSlot(E->getType());
1268 CGF.EmitCXXConstructExpr(E, Slot);
1269 }
1270
1271 void AggExprEmitter::VisitCXXInheritedCtorInitExpr(
1272 const CXXInheritedCtorInitExpr *E) {
1273 AggValueSlot Slot = EnsureSlot(E->getType());
1274 CGF.EmitInheritedCXXConstructorCall(
1275 E->getConstructor(), E->constructsVBase(), Slot.getAddress(),
1276 E->inheritedFromVBase(), E);
1277 }
1278
1279 void
1280 AggExprEmitter::VisitLambdaExpr(LambdaExpr *E) {
1281 AggValueSlot Slot = EnsureSlot(E->getType());
1282 LValue SlotLV = CGF.MakeAddrLValue(Slot.getAddress(), E->getType());
1283
1284 // We'll need to enter cleanup scopes in case any of the element
1285 // initializers throws an exception.
1286 SmallVector<EHScopeStack::stable_iterator, 16> Cleanups;
1287 llvm::Instruction *CleanupDominator = nullptr;
1288
1289 CXXRecordDecl::field_iterator CurField = E->getLambdaClass()->field_begin();
1290 for (LambdaExpr::const_capture_init_iterator i = E->capture_init_begin(),
1291 e = E->capture_init_end();
1292 i != e; ++i, ++CurField) {
1293 // Emit initialization
1294 LValue LV = CGF.EmitLValueForFieldInitialization(SlotLV, *CurField);
1295 if (CurField->hasCapturedVLAType()) {
1296 CGF.EmitLambdaVLACapture(CurField->getCapturedVLAType(), LV);
1297 continue;
1298 }
1299
1300 EmitInitializationToLValue(*i, LV);
1301
1302 // Push a destructor if necessary.
1303 if (QualType::DestructionKind DtorKind =
1304 CurField->getType().isDestructedType()) {
1305 assert(LV.isSimple());
1306 if (CGF.needsEHCleanup(DtorKind)) {
1307 if (!CleanupDominator)
1308 CleanupDominator = CGF.Builder.CreateAlignedLoad(
1309 CGF.Int8Ty,
1310 llvm::Constant::getNullValue(CGF.Int8PtrTy),
1311 CharUnits::One()); // placeholder
1312
1313 CGF.pushDestroy(EHCleanup, LV.getAddress(CGF), CurField->getType(),
1314 CGF.getDestroyer(DtorKind), false);
1315 Cleanups.push_back(CGF.EHStack.stable_begin());
1316 }
1317 }
1318 }
1319
1320 // Deactivate all the partial cleanups in reverse order, which
1321 // generally means popping them.
1322 for (unsigned i = Cleanups.size(); i != 0; --i)
1323 CGF.DeactivateCleanupBlock(Cleanups[i-1], CleanupDominator);
1324
1325 // Destroy the placeholder if we made one.
1326 if (CleanupDominator)
1327 CleanupDominator->eraseFromParent();
1328 }
1329
1330 void AggExprEmitter::VisitExprWithCleanups(ExprWithCleanups *E) {
1331 CGF.enterFullExpression(E);
1332 CodeGenFunction::RunCleanupsScope cleanups(CGF);
1333 Visit(E->getSubExpr());
1334 }
1335
1336 void AggExprEmitter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1337 QualType T = E->getType();
1338 AggValueSlot Slot = EnsureSlot(T);
1339 EmitNullInitializationToLValue(CGF.MakeAddrLValue(Slot.getAddress(), T));
1340 }
1341
1342 void AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1343 QualType T = E->getType();
1344 AggValueSlot Slot = EnsureSlot(T);
1345 EmitNullInitializationToLValue(CGF.MakeAddrLValue(Slot.getAddress(), T));
1346 }
1347
1348 /// isSimpleZero - If emitting this value will obviously just cause a store of
1349 /// zero to memory, return true. This can return false if uncertain, so it just
1350 /// handles simple cases.
1351 static bool isSimpleZero(const Expr *E, CodeGenFunction &CGF) {
1352 E = E->IgnoreParens();
1353
1354 // 0
1355 if (const IntegerLiteral *IL = dyn_cast<IntegerLiteral>(E))
1356 return IL->getValue() == 0;
1357 // +0.0
1358 if (const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(E))
1359 return FL->getValue().isPosZero();
1360 // int()
1361 if ((isa<ImplicitValueInitExpr>(E) || isa<CXXScalarValueInitExpr>(E)) &&
1362 CGF.getTypes().isZeroInitializable(E->getType()))
1363 return true;
1364 // (int*)0 - Null pointer expressions.
1365 if (const CastExpr *ICE = dyn_cast<CastExpr>(E))
1366 return ICE->getCastKind() == CK_NullToPointer &&
1367 CGF.getTypes().isPointerZeroInitializable(E->getType()) &&
1368 !E->HasSideEffects(CGF.getContext());
1369 // '\0'
1370 if (const CharacterLiteral *CL = dyn_cast<CharacterLiteral>(E))
1371 return CL->getValue() == 0;
1372
1373 // Otherwise, hard case: conservatively return false.
1374 return false;
1375 }
1376
1377
1378 void
1379 AggExprEmitter::EmitInitializationToLValue(Expr *E, LValue LV) {
1380 QualType type = LV.getType();
1381 // FIXME: Ignore result?
1382 // FIXME: Are initializers affected by volatile?
1383 if (Dest.isZeroed() && isSimpleZero(E, CGF)) {
1384 // Storing "i32 0" to a zero'd memory location is a noop.
1385 return;
1386 } else if (isa<ImplicitValueInitExpr>(E) || isa<CXXScalarValueInitExpr>(E)) {
1387 return EmitNullInitializationToLValue(LV);
1388 } else if (isa<NoInitExpr>(E)) {
1389 // Do nothing.
1390 return;
1391 } else if (type->isReferenceType()) {
1392 RValue RV = CGF.EmitReferenceBindingToExpr(E);
1393 return CGF.EmitStoreThroughLValue(RV, LV);
1394 }
1395
1396 switch (CGF.getEvaluationKind(type)) {
1397 case TEK_Complex:
1398 CGF.EmitComplexExprIntoLValue(E, LV, /*isInit*/ true);
1399 return;
1400 case TEK_Aggregate:
1401 CGF.EmitAggExpr(
1402 E, AggValueSlot::forLValue(LV, CGF, AggValueSlot::IsDestructed,
1403 AggValueSlot::DoesNotNeedGCBarriers,
1404 AggValueSlot::IsNotAliased,
1405 AggValueSlot::MayOverlap, Dest.isZeroed()));
1406 return;
1407 case TEK_Scalar:
1408 if (LV.isSimple()) {
1409 CGF.EmitScalarInit(E, /*D=*/nullptr, LV, /*Captured=*/false);
1410 } else {
1411 CGF.EmitStoreThroughLValue(RValue::get(CGF.EmitScalarExpr(E)), LV);
1412 }
1413 return;
1414 }
1415 llvm_unreachable("bad evaluation kind");
1416 }
1417
1418 void AggExprEmitter::EmitNullInitializationToLValue(LValue lv) {
1419 QualType type = lv.getType();
1420
1421 // If the destination slot is already zeroed out before the aggregate is
1422 // copied into it, we don't have to emit any zeros here.
1423 if (Dest.isZeroed() && CGF.getTypes().isZeroInitializable(type))
1424 return;
1425
1426 if (CGF.hasScalarEvaluationKind(type)) {
1427 // For non-aggregates, we can store the appropriate null constant.
1428 llvm::Value *null = CGF.CGM.EmitNullConstant(type);
1429 // Note that the following is not equivalent to
1430 // EmitStoreThroughBitfieldLValue for ARC types.
1431 if (lv.isBitField()) {
1432 CGF.EmitStoreThroughBitfieldLValue(RValue::get(null), lv);
1433 } else {
1434 assert(lv.isSimple());
1435 CGF.EmitStoreOfScalar(null, lv, /* isInitialization */ true);
1436 }
1437 } else {
1438 // There's a potential optimization opportunity in combining
1439 // memsets; that would be easy for arrays, but relatively
1440 // difficult for structures with the current code.
1441 CGF.EmitNullInitialization(lv.getAddress(CGF), lv.getType());
1442 }
1443 }
1444
1445 void AggExprEmitter::VisitInitListExpr(InitListExpr *E) {
1446 #if 0
1447 // FIXME: Assess perf here? Figure out what cases are worth optimizing here
1448 // (Length of globals? Chunks of zeroed-out space?).
1449 //
1450 // If we can, prefer a copy from a global; this is a lot less code for long
1451 // globals, and it's easier for the current optimizers to analyze.
1452 if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) {
1453 llvm::GlobalVariable* GV =
1454 new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true,
1455 llvm::GlobalValue::InternalLinkage, C, "");
1456 EmitFinalDestCopy(E->getType(), CGF.MakeAddrLValue(GV, E->getType()));
1457 return;
1458 }
1459 #endif
1460 if (E->hadArrayRangeDesignator())
1461 CGF.ErrorUnsupported(E, "GNU array range designator extension");
1462
1463 if (E->isTransparent())
1464 return Visit(E->getInit(0));
1465
1466 AggValueSlot Dest = EnsureSlot(E->getType());
1467
1468 LValue DestLV = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
1469
1470 // Handle initialization of an array.
1471 if (E->getType()->isArrayType()) {
1472 auto AType = cast<llvm::ArrayType>(Dest.getAddress().getElementType());
1473 EmitArrayInit(Dest.getAddress(), AType, E->getType(), E);
1474 return;
1475 }
1476
1477 assert(E->getType()->isRecordType() && "Only support structs/unions here!");
1478
1479 // Do struct initialization; this code just sets each individual member
1480 // to the approprate value. This makes bitfield support automatic;
1481 // the disadvantage is that the generated code is more difficult for
1482 // the optimizer, especially with bitfields.
1483 unsigned NumInitElements = E->getNumInits();
1484 RecordDecl *record = E->getType()->castAs<RecordType>()->getDecl();
1485
1486 // We'll need to enter cleanup scopes in case any of the element
1487 // initializers throws an exception.
1488 SmallVector<EHScopeStack::stable_iterator, 16> cleanups;
1489 llvm::Instruction *cleanupDominator = nullptr;
1490 auto addCleanup = [&](const EHScopeStack::stable_iterator &cleanup) {
1491 cleanups.push_back(cleanup);
1492 if (!cleanupDominator) // create placeholder once needed
1493 cleanupDominator = CGF.Builder.CreateAlignedLoad(
1494 CGF.Int8Ty, llvm::Constant::getNullValue(CGF.Int8PtrTy),
1495 CharUnits::One());
1496 };
1497
1498 unsigned curInitIndex = 0;
1499
1500 // Emit initialization of base classes.
1501 if (auto *CXXRD = dyn_cast<CXXRecordDecl>(record)) {
1502 assert(E->getNumInits() >= CXXRD->getNumBases() &&
1503 "missing initializer for base class");
1504 for (auto &Base : CXXRD->bases()) {
1505 assert(!Base.isVirtual() && "should not see vbases here");
1506 auto *BaseRD = Base.getType()->getAsCXXRecordDecl();
1507 Address V = CGF.GetAddressOfDirectBaseInCompleteClass(
1508 Dest.getAddress(), CXXRD, BaseRD,
1509 /*isBaseVirtual*/ false);
1510 AggValueSlot AggSlot = AggValueSlot::forAddr(
1511 V, Qualifiers(),
1512 AggValueSlot::IsDestructed,
1513 AggValueSlot::DoesNotNeedGCBarriers,
1514 AggValueSlot::IsNotAliased,
1515 CGF.getOverlapForBaseInit(CXXRD, BaseRD, Base.isVirtual()));
1516 CGF.EmitAggExpr(E->getInit(curInitIndex++), AggSlot);
1517
1518 if (QualType::DestructionKind dtorKind =
1519 Base.getType().isDestructedType()) {
1520 CGF.pushDestroy(dtorKind, V, Base.getType());
1521 addCleanup(CGF.EHStack.stable_begin());
1522 }
1523 }
1524 }
1525
1526 // Prepare a 'this' for CXXDefaultInitExprs.
1527 CodeGenFunction::FieldConstructionScope FCS(CGF, Dest.getAddress());
1528
1529 if (record->isUnion()) {
1530 // Only initialize one field of a union. The field itself is
1531 // specified by the initializer list.
1532 if (!E->getInitializedFieldInUnion()) {
1533 // Empty union; we have nothing to do.
1534
1535 #ifndef NDEBUG
1536 // Make sure that it's really an empty and not a failure of
1537 // semantic analysis.
1538 for (const auto *Field : record->fields())
1539 assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed");
1540 #endif
1541 return;
1542 }
1543
1544 // FIXME: volatility
1545 FieldDecl *Field = E->getInitializedFieldInUnion();
1546
1547 LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestLV, Field);
1548 if (NumInitElements) {
1549 // Store the initializer into the field
1550 EmitInitializationToLValue(E->getInit(0), FieldLoc);
1551 } else {
1552 // Default-initialize to null.
1553 EmitNullInitializationToLValue(FieldLoc);
1554 }
1555
1556 return;
1557 }
1558
1559 // Here we iterate over the fields; this makes it simpler to both
1560 // default-initialize fields and skip over unnamed fields.
1561 for (const auto *field : record->fields()) {
1562 // We're done once we hit the flexible array member.
1563 if (field->getType()->isIncompleteArrayType())
1564 break;
1565
1566 // Always skip anonymous bitfields.
1567 if (field->isUnnamedBitfield())
1568 continue;
1569
1570 // We're done if we reach the end of the explicit initializers, we
1571 // have a zeroed object, and the rest of the fields are
1572 // zero-initializable.
1573 if (curInitIndex == NumInitElements && Dest.isZeroed() &&
1574 CGF.getTypes().isZeroInitializable(E->getType()))
1575 break;
1576
1577
1578 LValue LV = CGF.EmitLValueForFieldInitialization(DestLV, field);
1579 // We never generate write-barries for initialized fields.
1580 LV.setNonGC(true);
1581
1582 if (curInitIndex < NumInitElements) {
1583 // Store the initializer into the field.
1584 EmitInitializationToLValue(E->getInit(curInitIndex++), LV);
1585 } else {
1586 // We're out of initializers; default-initialize to null
1587 EmitNullInitializationToLValue(LV);
1588 }
1589
1590 // Push a destructor if necessary.
1591 // FIXME: if we have an array of structures, all explicitly
1592 // initialized, we can end up pushing a linear number of cleanups.
1593 bool pushedCleanup = false;
1594 if (QualType::DestructionKind dtorKind
1595 = field->getType().isDestructedType()) {
1596 assert(LV.isSimple());
1597 if (CGF.needsEHCleanup(dtorKind)) {
1598 CGF.pushDestroy(EHCleanup, LV.getAddress(CGF), field->getType(),
1599 CGF.getDestroyer(dtorKind), false);
1600 addCleanup(CGF.EHStack.stable_begin());
1601 pushedCleanup = true;
1602 }
1603 }
1604
1605 // If the GEP didn't get used because of a dead zero init or something
1606 // else, clean it up for -O0 builds and general tidiness.
1607 if (!pushedCleanup && LV.isSimple())
1608 if (llvm::GetElementPtrInst *GEP =
1609 dyn_cast<llvm::GetElementPtrInst>(LV.getPointer(CGF)))
1610 if (GEP->use_empty())
1611 GEP->eraseFromParent();
1612 }
1613
1614 // Deactivate all the partial cleanups in reverse order, which
1615 // generally means popping them.
1616 assert((cleanupDominator || cleanups.empty()) &&
1617 "Missing cleanupDominator before deactivating cleanup blocks");
1618 for (unsigned i = cleanups.size(); i != 0; --i)
1619 CGF.DeactivateCleanupBlock(cleanups[i-1], cleanupDominator);
1620
1621 // Destroy the placeholder if we made one.
1622 if (cleanupDominator)
1623 cleanupDominator->eraseFromParent();
1624 }
1625
1626 void AggExprEmitter::VisitArrayInitLoopExpr(const ArrayInitLoopExpr *E,
1627 llvm::Value *outerBegin) {
1628 // Emit the common subexpression.
1629 CodeGenFunction::OpaqueValueMapping binding(CGF, E->getCommonExpr());
1630
1631 Address destPtr = EnsureSlot(E->getType()).getAddress();
1632 uint64_t numElements = E->getArraySize().getZExtValue();
1633
1634 if (!numElements)
1635 return;
1636
1637 // destPtr is an array*. Construct an elementType* by drilling down a level.
1638 llvm::Value *zero = llvm::ConstantInt::get(CGF.SizeTy, 0);
1639 llvm::Value *indices[] = {zero, zero};
1640 llvm::Value *begin = Builder.CreateInBoundsGEP(destPtr.getPointer(), indices,
1641 "arrayinit.begin");
1642
1643 // Prepare to special-case multidimensional array initialization: we avoid
1644 // emitting multiple destructor loops in that case.
1645 if (!outerBegin)
1646 outerBegin = begin;
1647 ArrayInitLoopExpr *InnerLoop = dyn_cast<ArrayInitLoopExpr>(E->getSubExpr());
1648
1649 QualType elementType =
1650 CGF.getContext().getAsArrayType(E->getType())->getElementType();
1651 CharUnits elementSize = CGF.getContext().getTypeSizeInChars(elementType);
1652 CharUnits elementAlign =
1653 destPtr.getAlignment().alignmentOfArrayElement(elementSize);
1654
1655 llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
1656 llvm::BasicBlock *bodyBB = CGF.createBasicBlock("arrayinit.body");
1657
1658 // Jump into the body.
1659 CGF.EmitBlock(bodyBB);
1660 llvm::PHINode *index =
1661 Builder.CreatePHI(zero->getType(), 2, "arrayinit.index");
1662 index->addIncoming(zero, entryBB);
1663 llvm::Value *element = Builder.CreateInBoundsGEP(begin, index);
1664
1665 // Prepare for a cleanup.
1666 QualType::DestructionKind dtorKind = elementType.isDestructedType();
1667 EHScopeStack::stable_iterator cleanup;
1668 if (CGF.needsEHCleanup(dtorKind) && !InnerLoop) {
1669 if (outerBegin->getType() != element->getType())
1670 outerBegin = Builder.CreateBitCast(outerBegin, element->getType());
1671 CGF.pushRegularPartialArrayCleanup(outerBegin, element, elementType,
1672 elementAlign,
1673 CGF.getDestroyer(dtorKind));
1674 cleanup = CGF.EHStack.stable_begin();
1675 } else {
1676 dtorKind = QualType::DK_none;
1677 }
1678
1679 // Emit the actual filler expression.
1680 {
1681 // Temporaries created in an array initialization loop are destroyed
1682 // at the end of each iteration.
1683 CodeGenFunction::RunCleanupsScope CleanupsScope(CGF);
1684 CodeGenFunction::ArrayInitLoopExprScope Scope(CGF, index);
1685 LValue elementLV =
1686 CGF.MakeAddrLValue(Address(element, elementAlign), elementType);
1687
1688 if (InnerLoop) {
1689 // If the subexpression is an ArrayInitLoopExpr, share its cleanup.
1690 auto elementSlot = AggValueSlot::forLValue(
1691 elementLV, CGF, AggValueSlot::IsDestructed,
1692 AggValueSlot::DoesNotNeedGCBarriers, AggValueSlot::IsNotAliased,
1693 AggValueSlot::DoesNotOverlap);
1694 AggExprEmitter(CGF, elementSlot, false)
1695 .VisitArrayInitLoopExpr(InnerLoop, outerBegin);
1696 } else
1697 EmitInitializationToLValue(E->getSubExpr(), elementLV);
1698 }
1699
1700 // Move on to the next element.
1701 llvm::Value *nextIndex = Builder.CreateNUWAdd(
1702 index, llvm::ConstantInt::get(CGF.SizeTy, 1), "arrayinit.next");
1703 index->addIncoming(nextIndex, Builder.GetInsertBlock());
1704
1705 // Leave the loop if we're done.
1706 llvm::Value *done = Builder.CreateICmpEQ(
1707 nextIndex, llvm::ConstantInt::get(CGF.SizeTy, numElements),
1708 "arrayinit.done");
1709 llvm::BasicBlock *endBB = CGF.createBasicBlock("arrayinit.end");
1710 Builder.CreateCondBr(done, endBB, bodyBB);
1711
1712 CGF.EmitBlock(endBB);
1713
1714 // Leave the partial-array cleanup if we entered one.
1715 if (dtorKind)
1716 CGF.DeactivateCleanupBlock(cleanup, index);
1717 }
1718
1719 void AggExprEmitter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
1720 AggValueSlot Dest = EnsureSlot(E->getType());
1721
1722 LValue DestLV = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
1723 EmitInitializationToLValue(E->getBase(), DestLV);
1724 VisitInitListExpr(E->getUpdater());
1725 }
1726
1727 //===----------------------------------------------------------------------===//
1728 // Entry Points into this File
1729 //===----------------------------------------------------------------------===//
1730
1731 /// GetNumNonZeroBytesInInit - Get an approximate count of the number of
1732 /// non-zero bytes that will be stored when outputting the initializer for the
1733 /// specified initializer expression.
1734 static CharUnits GetNumNonZeroBytesInInit(const Expr *E, CodeGenFunction &CGF) {
1735 E = E->IgnoreParens();
1736
1737 // 0 and 0.0 won't require any non-zero stores!
1738 if (isSimpleZero(E, CGF)) return CharUnits::Zero();
1739
1740 // If this is an initlist expr, sum up the size of sizes of the (present)
1741 // elements. If this is something weird, assume the whole thing is non-zero.
1742 const InitListExpr *ILE = dyn_cast<InitListExpr>(E);
1743 while (ILE && ILE->isTransparent())
1744 ILE = dyn_cast<InitListExpr>(ILE->getInit(0));
1745 if (!ILE || !CGF.getTypes().isZeroInitializable(ILE->getType()))
1746 return CGF.getContext().getTypeSizeInChars(E->getType());
1747
1748 // InitListExprs for structs have to be handled carefully. If there are
1749 // reference members, we need to consider the size of the reference, not the
1750 // referencee. InitListExprs for unions and arrays can't have references.
1751 if (const RecordType *RT = E->getType()->getAs<RecordType>()) {
1752 if (!RT->isUnionType()) {
1753 RecordDecl *SD = RT->getDecl();
1754 CharUnits NumNonZeroBytes = CharUnits::Zero();
1755
1756 unsigned ILEElement = 0;
1757 if (auto *CXXRD = dyn_cast<CXXRecordDecl>(SD))
1758 while (ILEElement != CXXRD->getNumBases())
1759 NumNonZeroBytes +=
1760 GetNumNonZeroBytesInInit(ILE->getInit(ILEElement++), CGF);
1761 for (const auto *Field : SD->fields()) {
1762 // We're done once we hit the flexible array member or run out of
1763 // InitListExpr elements.
1764 if (Field->getType()->isIncompleteArrayType() ||
1765 ILEElement == ILE->getNumInits())
1766 break;
1767 if (Field->isUnnamedBitfield())
1768 continue;
1769
1770 const Expr *E = ILE->getInit(ILEElement++);
1771
1772 // Reference values are always non-null and have the width of a pointer.
1773 if (Field->getType()->isReferenceType())
1774 NumNonZeroBytes += CGF.getContext().toCharUnitsFromBits(
1775 CGF.getTarget().getPointerWidth(0));
1776 else
1777 NumNonZeroBytes += GetNumNonZeroBytesInInit(E, CGF);
1778 }
1779
1780 return NumNonZeroBytes;
1781 }
1782 }
1783
1784
1785 CharUnits NumNonZeroBytes = CharUnits::Zero();
1786 for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i)
1787 NumNonZeroBytes += GetNumNonZeroBytesInInit(ILE->getInit(i), CGF);
1788 return NumNonZeroBytes;
1789 }
1790
1791 /// CheckAggExprForMemSetUse - If the initializer is large and has a lot of
1792 /// zeros in it, emit a memset and avoid storing the individual zeros.
1793 ///
1794 static void CheckAggExprForMemSetUse(AggValueSlot &Slot, const Expr *E,
1795 CodeGenFunction &CGF) {
1796 // If the slot is already known to be zeroed, nothing to do. Don't mess with
1797 // volatile stores.
1798 if (Slot.isZeroed() || Slot.isVolatile() || !Slot.getAddress().isValid())
1799 return;
1800
1801 // C++ objects with a user-declared constructor don't need zero'ing.
1802 if (CGF.getLangOpts().CPlusPlus)
1803 if (const RecordType *RT = CGF.getContext()
1804 .getBaseElementType(E->getType())->getAs<RecordType>()) {
1805 const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
1806 if (RD->hasUserDeclaredConstructor())
1807 return;
1808 }
1809
1810 // If the type is 16-bytes or smaller, prefer individual stores over memset.
1811 CharUnits Size = Slot.getPreferredSize(CGF.getContext(), E->getType());
1812 if (Size <= CharUnits::fromQuantity(16))
1813 return;
1814
1815 // Check to see if over 3/4 of the initializer are known to be zero. If so,
1816 // we prefer to emit memset + individual stores for the rest.
1817 CharUnits NumNonZeroBytes = GetNumNonZeroBytesInInit(E, CGF);
1818 if (NumNonZeroBytes*4 > Size)
1819 return;
1820
1821 // Okay, it seems like a good idea to use an initial memset, emit the call.
1822 llvm::Constant *SizeVal = CGF.Builder.getInt64(Size.getQuantity());
1823
1824 Address Loc = Slot.getAddress();
1825 Loc = CGF.Builder.CreateElementBitCast(Loc, CGF.Int8Ty);
1826 CGF.Builder.CreateMemSet(Loc, CGF.Builder.getInt8(0), SizeVal, false);
1827
1828 // Tell the AggExprEmitter that the slot is known zero.
1829 Slot.setZeroed();
1830 }
1831
1832
1833
1834
1835 /// EmitAggExpr - Emit the computation of the specified expression of aggregate
1836 /// type. The result is computed into DestPtr. Note that if DestPtr is null,
1837 /// the value of the aggregate expression is not needed. If VolatileDest is
1838 /// true, DestPtr cannot be 0.
1839 void CodeGenFunction::EmitAggExpr(const Expr *E, AggValueSlot Slot) {
1840 assert(E && hasAggregateEvaluationKind(E->getType()) &&
1841 "Invalid aggregate expression to emit");
1842 assert((Slot.getAddress().isValid() || Slot.isIgnored()) &&
1843 "slot has bits but no address");
1844
1845 // Optimize the slot if possible.
1846 CheckAggExprForMemSetUse(Slot, E, *this);
1847
1848 AggExprEmitter(*this, Slot, Slot.isIgnored()).Visit(const_cast<Expr*>(E));
1849 }
1850
1851 LValue CodeGenFunction::EmitAggExprToLValue(const Expr *E) {
1852 assert(hasAggregateEvaluationKind(E->getType()) && "Invalid argument!");
1853 Address Temp = CreateMemTemp(E->getType());
1854 LValue LV = MakeAddrLValue(Temp, E->getType());
1855 EmitAggExpr(E, AggValueSlot::forLValue(
1856 LV, *this, AggValueSlot::IsNotDestructed,
1857 AggValueSlot::DoesNotNeedGCBarriers,
1858 AggValueSlot::IsNotAliased, AggValueSlot::DoesNotOverlap));
1859 return LV;
1860 }
1861
1862 AggValueSlot::Overlap_t
1863 CodeGenFunction::getOverlapForFieldInit(const FieldDecl *FD) {
1864 if (!FD->hasAttr<NoUniqueAddressAttr>() || !FD->getType()->isRecordType())
1865 return AggValueSlot::DoesNotOverlap;
1866
1867 // If the field lies entirely within the enclosing class's nvsize, its tail
1868 // padding cannot overlap any already-initialized object. (The only subobjects
1869 // with greater addresses that might already be initialized are vbases.)
1870 const RecordDecl *ClassRD = FD->getParent();
1871 const ASTRecordLayout &Layout = getContext().getASTRecordLayout(ClassRD);
1872 if (Layout.getFieldOffset(FD->getFieldIndex()) +
1873 getContext().getTypeSize(FD->getType()) <=
1874 (uint64_t)getContext().toBits(Layout.getNonVirtualSize()))
1875 return AggValueSlot::DoesNotOverlap;
1876
1877 // The tail padding may contain values we need to preserve.
1878 return AggValueSlot::MayOverlap;
1879 }
1880
1881 AggValueSlot::Overlap_t CodeGenFunction::getOverlapForBaseInit(
1882 const CXXRecordDecl *RD, const CXXRecordDecl *BaseRD, bool IsVirtual) {
1883 // If the most-derived object is a field declared with [[no_unique_address]],
1884 // the tail padding of any virtual base could be reused for other subobjects
1885 // of that field's class.
1886 if (IsVirtual)
1887 return AggValueSlot::MayOverlap;
1888
1889 // If the base class is laid out entirely within the nvsize of the derived
1890 // class, its tail padding cannot yet be initialized, so we can issue
1891 // stores at the full width of the base class.
1892 const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
1893 if (Layout.getBaseClassOffset(BaseRD) +
1894 getContext().getASTRecordLayout(BaseRD).getSize() <=
1895 Layout.getNonVirtualSize())
1896 return AggValueSlot::DoesNotOverlap;
1897
1898 // The tail padding may contain values we need to preserve.
1899 return AggValueSlot::MayOverlap;
1900 }
1901
1902 void CodeGenFunction::EmitAggregateCopy(LValue Dest, LValue Src, QualType Ty,
1903 AggValueSlot::Overlap_t MayOverlap,
1904 bool isVolatile) {
1905 assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex");
1906
1907 Address DestPtr = Dest.getAddress(*this);
1908 Address SrcPtr = Src.getAddress(*this);
1909
1910 if (getLangOpts().CPlusPlus) {
1911 if (const RecordType *RT = Ty->getAs<RecordType>()) {
1912 CXXRecordDecl *Record = cast<CXXRecordDecl>(RT->getDecl());
1913 assert((Record->hasTrivialCopyConstructor() ||
1914 Record->hasTrivialCopyAssignment() ||
1915 Record->hasTrivialMoveConstructor() ||
1916 Record->hasTrivialMoveAssignment() ||
1917 Record->isUnion()) &&
1918 "Trying to aggregate-copy a type without a trivial copy/move "
1919 "constructor or assignment operator");
1920 // Ignore empty classes in C++.
1921 if (Record->isEmpty())
1922 return;
1923 }
1924 }
1925
1926 // Aggregate assignment turns into llvm.memcpy. This is almost valid per
1927 // C99 6.5.16.1p3, which states "If the value being stored in an object is
1928 // read from another object that overlaps in anyway the storage of the first
1929 // object, then the overlap shall be exact and the two objects shall have
1930 // qualified or unqualified versions of a compatible type."
1931 //
1932 // memcpy is not defined if the source and destination pointers are exactly
1933 // equal, but other compilers do this optimization, and almost every memcpy
1934 // implementation handles this case safely. If there is a libc that does not
1935 // safely handle this, we can add a target hook.
1936
1937 // Get data size info for this aggregate. Don't copy the tail padding if this
1938 // might be a potentially-overlapping subobject, since the tail padding might
1939 // be occupied by a different object. Otherwise, copying it is fine.
1940 std::pair<CharUnits, CharUnits> TypeInfo;
1941 if (MayOverlap)
1942 TypeInfo = getContext().getTypeInfoDataSizeInChars(Ty);
1943 else
1944 TypeInfo = getContext().getTypeInfoInChars(Ty);
1945
1946 llvm::Value *SizeVal = nullptr;
1947 if (TypeInfo.first.isZero()) {
1948 // But note that getTypeInfo returns 0 for a VLA.
1949 if (auto *VAT = dyn_cast_or_null<VariableArrayType>(
1950 getContext().getAsArrayType(Ty))) {
1951 QualType BaseEltTy;
1952 SizeVal = emitArrayLength(VAT, BaseEltTy, DestPtr);
1953 TypeInfo = getContext().getTypeInfoInChars(BaseEltTy);
1954 assert(!TypeInfo.first.isZero());
1955 SizeVal = Builder.CreateNUWMul(
1956 SizeVal,
1957 llvm::ConstantInt::get(SizeTy, TypeInfo.first.getQuantity()));
1958 }
1959 }
1960 if (!SizeVal) {
1961 SizeVal = llvm::ConstantInt::get(SizeTy, TypeInfo.first.getQuantity());
1962 }
1963
1964 // FIXME: If we have a volatile struct, the optimizer can remove what might
1965 // appear to be `extra' memory ops:
1966 //
1967 // volatile struct { int i; } a, b;
1968 //
1969 // int main() {
1970 // a = b;
1971 // a = b;
1972 // }
1973 //
1974 // we need to use a different call here. We use isVolatile to indicate when
1975 // either the source or the destination is volatile.
1976
1977 DestPtr = Builder.CreateElementBitCast(DestPtr, Int8Ty);
1978 SrcPtr = Builder.CreateElementBitCast(SrcPtr, Int8Ty);
1979
1980 // Don't do any of the memmove_collectable tests if GC isn't set.
1981 if (CGM.getLangOpts().getGC() == LangOptions::NonGC) {
1982 // fall through
1983 } else if (const RecordType *RecordTy = Ty->getAs<RecordType>()) {
1984 RecordDecl *Record = RecordTy->getDecl();
1985 if (Record->hasObjectMember()) {
1986 CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr,
1987 SizeVal);
1988 return;
1989 }
1990 } else if (Ty->isArrayType()) {
1991 QualType BaseType = getContext().getBaseElementType(Ty);
1992 if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) {
1993 if (RecordTy->getDecl()->hasObjectMember()) {
1994 CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr,
1995 SizeVal);
1996 return;
1997 }
1998 }
1999 }
2000
2001 auto Inst = Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, isVolatile);
2002
2003 // Determine the metadata to describe the position of any padding in this
2004 // memcpy, as well as the TBAA tags for the members of the struct, in case
2005 // the optimizer wishes to expand it in to scalar memory operations.
2006 if (llvm::MDNode *TBAAStructTag = CGM.getTBAAStructInfo(Ty))
2007 Inst->setMetadata(llvm::LLVMContext::MD_tbaa_struct, TBAAStructTag);
2008
2009 if (CGM.getCodeGenOpts().NewStructPathTBAA) {
2010 TBAAAccessInfo TBAAInfo = CGM.mergeTBAAInfoForMemoryTransfer(
2011 Dest.getTBAAInfo(), Src.getTBAAInfo());
2012 CGM.DecorateInstructionWithTBAA(Inst, TBAAInfo);
2013 }
2014 }
clang::CodeGen::RValue::isAggregate
bool isAggregate() const
Definition: CGValue.h:54
clang::CodeGen::CodeGenModule::getDataLayout
const llvm::DataLayout & getDataLayout() const
Definition: CodeGenModule.h:683
clang::FullExpr::getSubExpr
const Expr * getSubExpr() const
Definition: Expr.h:963
clang::ComparisonCategoryInfo
Definition: ComparisonCategories.h:74
clang::CodeGen::ReturnValueSlot
ReturnValueSlot - Contains the address where the return value of a function can be stored...
Definition: CGCall.h:359
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::ChooseExpr::getChosenSubExpr
Expr * getChosenSubExpr() const
getChosenSubExpr - Return the subexpression chosen according to the condition.
Definition: Expr.h:4171
clang::CodeGen::AggValueSlot::DoesNotNeedGCBarriers
Definition: CGValue.h:496
clang::CodeGen::AggValueSlot::getAddress
Address getAddress() const
Definition: CGValue.h:583
clang::CodeGen::CodeGenFunction::ConditionalEvaluation::end
void end(CodeGenFunction &CGF)
Definition: CodeGenFunction.h:1030
clang::ComparisonCategoryInfo::ValueInfo
Definition: ComparisonCategories.h:83
clang::CodeGen::CodeGenFunction::getDestroyer
Destroyer * getDestroyer(QualType::DestructionKind destructionKind)
Definition: CGDecl.cpp:2028
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:654
clang::index::SymbolKind::Field
clang::QualType::isPODType
bool isPODType(const ASTContext &Context) const
Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
Definition: Type.cpp:2185
clang::Type::isArrayType
bool isArrayType() const
Definition: Type.h:6570
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::CodeGenFunction::EmitCoyieldExpr
RValue EmitCoyieldExpr(const CoyieldExpr &E, AggValueSlot aggSlot=AggValueSlot::ignored(), bool ignoreResult=false)
Definition: CGCoroutine.cpp:268
clang::CodeGen::CodeGenFunction::CreateMemTemp
Address CreateMemTemp(QualType T, const Twine &Name="tmp", Address *Alloca=nullptr)
CreateMemTemp - Create a temporary memory object of the given type, with appropriate alignmen and cas...
Definition: CGExpr.cpp:139
clang::CodeGen::CodeGenFunction::enterFullExpression
void enterFullExpression(const FullExpr *E)
Definition: CodeGenFunction.h:4016
clang::CodeGen::CodeGenFunction::HaveInsertPoint
bool HaveInsertPoint() const
HaveInsertPoint - True if an insertion point is defined.
Definition: CodeGenFunction.h:2112
clang::GenericSelectionExpr::getResultExpr
Expr * getResultExpr()
Return the result expression of this controlling expression.
Definition: Expr.h:5426
clang::StmtExpr::getSubStmt
CompoundStmt * getSubStmt()
Definition: Expr.h:3970
clang::InitListExpr::getInit
const Expr * getInit(unsigned Init) const
Definition: Expr.h:4451
clang::CodeGen::AggValueSlot::NeedsGCBarriers_t
NeedsGCBarriers_t
Definition: CGValue.h:496
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::CodeGen::CodeGenFunction::GetAddressOfDirectBaseInCompleteClass
Address GetAddressOfDirectBaseInCompleteClass(Address Value, const CXXRecordDecl *Derived, const CXXRecordDecl *Base, bool BaseIsVirtual)
GetAddressOfBaseOfCompleteClass - Convert the given pointer to a complete class to the given direct b...
Definition: CGClass.cpp:200
clang::CodeGen::ConstantEmitter::tryEmitForInitializer
llvm::Constant * tryEmitForInitializer(const VarDecl &D)
Try to emit the initiaizer of the given declaration as an abstract constant.
Definition: CGExprConstant.cpp:1391
clang::CodeGen::CodeGenFunction::CXXDefaultArgExprScope
Definition: CodeGenFunction.h:1467
clang::ASTRecordLayout::getBaseClassOffset
CharUnits getBaseClassOffset(const CXXRecordDecl *Base) const
getBaseClassOffset - Get the offset, in chars, for the given base class.
Definition: RecordLayout.h:232
clang::CodeGen::AggValueSlot::requiresGCollection
NeedsGCBarriers_t requiresGCollection() const
Definition: CGValue.h:575
clang::format::cleanup
tooling::Replacements cleanup(const FormatStyle &Style, StringRef Code, ArrayRef< tooling::Range > Ranges, StringRef FileName="<stdin>")
Clean up any erroneous/redundant code in the given Ranges in Code.
Definition: Format.cpp:2472
clang::QualType::DK_nontrivial_c_struct
Definition: Type.h:1167
Base
clang::CodeGen::AggValueSlot::getPointer
llvm::Value * getPointer() const
Definition: CGValue.h:579
clang::Type::isRecordType
bool isRecordType() const
Definition: Type.h:6594
clang::CodeGen::CodeGenFunction::EmitVAArg
Address EmitVAArg(VAArgExpr *VE, Address &VAListAddr)
Generate code to get an argument from the passed in pointer and update it accordingly.
Definition: CGCall.cpp:4662
clang::CodeGen::CGObjCRuntime::EmitGCMemmoveCollectable
virtual void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF, Address DestPtr, Address SrcPtr, llvm::Value *Size)=0
clang::CodeGen::CodeGenFunction::EmitPseudoObjectRValue
RValue EmitPseudoObjectRValue(const PseudoObjectExpr *e, AggValueSlot slot=AggValueSlot::ignored())
Definition: CGExpr.cpp:5172
clang::CodeGen::CodeGenFunction::EmitCoawaitExpr
RValue EmitCoawaitExpr(const CoawaitExpr &E, AggValueSlot aggSlot=AggValueSlot::ignored(), bool ignoreResult=false)
Definition: CGCoroutine.cpp:261
clang::InitListExpr::isTransparent
bool isTransparent() const
Is this a transparent initializer list (that is, an InitListExpr that is purely syntactic, and whose semantics are that of the sole contained initializer)?
Definition: Expr.cpp:2298
DeclTemplate.h
Defines the C++ template declaration subclasses.
clang::BinaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:3469
clang::FieldDecl::getFieldIndex
unsigned getFieldIndex() const
Returns the index of this field within its record, as appropriate for passing to ASTRecordLayout::get...
Definition: Decl.cpp:4074
clang::ParenExpr
ParenExpr - This represents a parethesized expression, e.g.
Definition: Expr.h:1994
clang::AbstractConditionalOperator::getFalseExpr
Expr * getFalseExpr() const
Definition: Expr.h:3903
clang::FieldDecl::getParent
const RecordDecl * getParent() const
Returns the parent of this field declaration, which is the struct in which this field is defined...
Definition: Decl.h:2918
clang::IntegerLiteral
Definition: Expr.h:1446
clang::CodeGen::CodeGenFunction::EmitStoreThroughLValue
void EmitStoreThroughLValue(RValue Src, LValue Dst, bool isInit=false)
EmitStoreThroughLValue - Store the specified rvalue into the specified lvalue, where both are guarant...
Definition: CGExpr.cpp:1929
clang::CodeGen::CodeGenFunction::EmitComplexExprIntoLValue
void EmitComplexExprIntoLValue(const Expr *E, LValue dest, bool isInit)
EmitComplexExprIntoLValue - Emit the given expression of complex type and place its result into the s...
Definition: CGExprComplex.cpp:1116
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2889
clang::CXXConstructExpr
Represents a call to a C++ constructor.
Definition: ExprCXX.h:1422
clang::CXXRecordDecl::hasTrivialMoveConstructor
bool hasTrivialMoveConstructor() const
Determine whether this class has a trivial move constructor (C++11 [class.copy]p12) ...
Definition: DeclCXX.h:1204
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::CodeGen::AggValueSlot::setZeroed
void setZeroed(bool V=true)
Definition: CGValue.h:615
clang::AtomicType::getValueType
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:6140
clang::CodeGen::CodeGenFunction::EmitLValueForFieldInitialization
LValue EmitLValueForFieldInitialization(LValue Base, const FieldDecl *Field)
EmitLValueForFieldInitialization - Like EmitLValueForField, except that if the Field is a reference...
Definition: CGExpr.cpp:4212
clang::CodeGen::CodeGenTypeCache::Int8Ty
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
Definition: CodeGenTypeCache.h:37
clang::MaterializeTemporaryExpr
Represents a prvalue temporary that is written into memory so that a reference can bind to it...
Definition: ExprCXX.h:4419
clang::CodeGen::AggValueSlot::isPotentiallyAliased
IsAliased_t isPotentiallyAliased() const
Definition: CGValue.h:595
clang::CodeGen::CodeGenFunction::EmitAtomicStore
void EmitAtomicStore(RValue rvalue, LValue lvalue, bool isInit)
Definition: CGAtomic.cpp:1954
clang::ArrayType::getElementType
QualType getElementType() const
Definition: Type.h:2910
Value
Value
Definition: UninitializedValues.cpp:101
isBlockVarRef
static bool isBlockVarRef(const Expr *E)
Is the value of the given expression possibly a reference to or into a __block variable?
Definition: CGExprAgg.cpp:1066
findPeephole
static Expr * findPeephole(Expr *op, CastKind kind)
Attempt to look through various unimportant expressions to find a cast of the given kind...
Definition: CGExprAgg.cpp:667
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:820
clang::CompoundLiteralExpr
CompoundLiteralExpr - [C99 6.5.2.5].
Definition: Expr.h:3077
clang::ArrayInitLoopExpr::getCommonExpr
OpaqueValueExpr * getCommonExpr() const
Get the common subexpression shared by all initializations (the source array).
Definition: Expr.h:5044
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:7002
clang::CodeGen::CodeGenFunction::getOverlapForFieldInit
AggValueSlot::Overlap_t getOverlapForFieldInit(const FieldDecl *FD)
Determine whether a field initialization may overlap some other object.
Definition: CGExprAgg.cpp:1863
clang::CodeGen::CodeGenFunction::getProfileCount
uint64_t getProfileCount(const Stmt *S)
Get the profiler&#39;s count for the given statement.
Definition: CodeGenFunction.h:1363
isSimpleZero
static bool isSimpleZero(const Expr *E, CodeGenFunction &CGF)
isSimpleZero - If emitting this value will obviously just cause a store of zero to memory...
Definition: CGExprAgg.cpp:1351
clang::LangAS
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:25
clang::CodeGen::AggValueSlot::isZeroed
IsZeroed_t isZeroed() const
Definition: CGValue.h:616
clang::CXXStdInitializerListExpr
Implicit construction of a std::initializer_list<T> object from an array temporary within list-initia...
Definition: ExprCXX.h:715
clang::CodeGen::Address::getPointer
llvm::Value * getPointer() const
Definition: Address.h:37
clang::CXXInheritedCtorInitExpr::getConstructor
CXXConstructorDecl * getConstructor() const
Get the constructor that this expression will call.
Definition: ExprCXX.h:1648
clang::CXXThrowExpr
A C++ throw-expression (C++ [except.throw]).
Definition: ExprCXX.h:1140
clang::ExprWithCleanups
Represents an expression – generally a full-expression – that introduces cleanups to be run at the ...
Definition: ExprCXX.h:3306
clang::CodeGen::CodeGenFunction::EmitStoreThroughBitfieldLValue
void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, llvm::Value **Result=nullptr)
EmitStoreThroughBitfieldLValue - Store Src into Dst with same constraints as EmitStoreThroughLValue.
Definition: CGExpr.cpp:2027
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:143
clang::LambdaExpr::getLambdaClass
CXXRecordDecl * getLambdaClass() const
Retrieve the class that corresponds to the lambda.
Definition: ExprCXX.cpp:1283
clang::Type::hasFloatingRepresentation
bool hasFloatingRepresentation() const
Determine whether this type has a floating-point representation of some sort, e.g., it is a floating-point type or a vector thereof.
Definition: Type.cpp:2014
clang::CodeGen::TEK_Aggregate
Definition: CodeGenFunction.h:108
GetNumNonZeroBytesInInit
static CharUnits GetNumNonZeroBytesInInit(const Expr *E, CodeGenFunction &CGF)
GetNumNonZeroBytesInInit - Get an approximate count of the number of non-zero bytes that will be stor...
Definition: CGExprAgg.cpp:1734
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3748
CK_Greater
Definition: CGExprAgg.cpp:917
clang::CXXRecordDecl::isEmpty
bool isEmpty() const
Determine whether this is an empty class in the sense of (C++11 [meta.unary.prop]).
Definition: DeclCXX.h:1099
clang::TargetInfo::getPointerWidth
uint64_t getPointerWidth(unsigned AddrSpace) const
Return the width of pointers on this target, for the specified address space.
Definition: TargetInfo.h:361
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::CXXRewrittenBinaryOperator::getSemanticForm
Expr * getSemanticForm()
Get an equivalent semantic form for this expression.
Definition: ExprCXX.h:293
clang::CodeGen::AggValueSlot::isExternallyDestructed
IsDestructed_t isExternallyDestructed() const
Definition: CGValue.h:551
clang::CodeGen::NormalEHLifetimeMarker
Definition: EHScopeStack.h:94
clang::CodeGen::AggValueSlot::isIgnored
bool isIgnored() const
Definition: CGValue.h:587
clang::CodeGen::AggValueSlot::DoesNotOverlap
Definition: CGValue.h:495
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:227
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::EmitDynamicCast
llvm::Value * EmitDynamicCast(Address V, const CXXDynamicCastExpr *DCE)
Definition: CGExprCXX.cpp:2194
clang::CodeGen::CodeGenFunction::EmitReferenceBindingToExpr
RValue EmitReferenceBindingToExpr(const Expr *E)
Emits a reference binding to the passed in expression.
Definition: CGExpr.cpp:593
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::AggValueSlot::IsNotAliased
Definition: CGValue.h:492
clang::CodeGen::CodeGenTypeCache::SizeTy
llvm::IntegerType * SizeTy
Definition: CodeGenTypeCache.h:47
clang::NoInitExpr
Represents a place-holder for an object not to be initialized by anything.
Definition: Expr.h:4937
clang::CodeGen::CodeGenFunction::OpaqueValueMapping
An RAII object to set (and then clear) a mapping for an OpaqueValueExpr.
Definition: CodeGenFunction.h:1163
clang::CodeGen::AggValueSlot::Overlap_t
Overlap_t
Definition: CGValue.h:495
clang::interp::Zero
bool Zero(InterpState &S, CodePtr OpPC)
Definition: Interp.h:812
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6516
clang::CXXRecordDecl::hasTrivialMoveAssignment
bool hasTrivialMoveAssignment() const
Determine whether this class has a trivial move assignment operator (C++11 [class.copy]p25)
Definition: DeclCXX.h:1244
clang::CodeGen::EHCleanup
Denotes a cleanup that should run when a scope is exited using exceptional control flow (a throw stat...
Definition: EHScopeStack.h:80
clang::OpaqueValueExpr::getSourceExpr
Expr * getSourceExpr() const
The source expression of an opaque value expression is the expression which originally generated the ...
Definition: Expr.h:1133
clang::CodeGen::AggValueSlot::forAddr
static AggValueSlot forAddr(Address addr, Qualifiers quals, IsDestructed_t isDestructed, NeedsGCBarriers_t needsGC, IsAliased_t isAliased, Overlap_t mayOverlap, IsZeroed_t isZeroed=IsNotZeroed, IsSanitizerChecked_t isChecked=IsNotSanitizerChecked)
forAddr - Make a slot for an aggregate value.
Definition: CGValue.h:516
clang::CharUnits::Zero
static CharUnits Zero()
Zero - Construct a CharUnits quantity of zero.
Definition: CharUnits.h:53
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:263
clang::CodeGen::AggValueSlot::isVolatile
bool isVolatile() const
Definition: CGValue.h:560
clang::CodeGen::AggValueSlot::getPreferredSize
CharUnits getPreferredSize(ASTContext &Ctx, QualType Type) const
Get the preferred size to use when storing a value to this slot.
Definition: CGValue.h:623
clang::CastExpr::getSubExpr
Expr * getSubExpr()
Definition: Expr.h:3202
clang::CodeGen::CodeGenModule::isPaddedAtomicType
bool isPaddedAtomicType(QualType type)
Definition: CodeGenTypes.cpp:703
isTrivialFiller
static bool isTrivialFiller(Expr *E)
Determine if E is a trivial array filler, that is, one that is equivalent to zero-initialization.
Definition: CGExprAgg.cpp:447
clang::Type::isIntegralOrEnumerationType
bool isIntegralOrEnumerationType() const
Determine whether this type is an integral or enumeration type.
Definition: Type.h:6881
clang::RecordDecl::field_iterator
specific_decl_iterator< FieldDecl > field_iterator
Definition: Decl.h:3960
clang::InitListExpr::hadArrayRangeDesignator
bool hadArrayRangeDesignator() const
Definition: Expr.h:4573
clang::interp::GE
bool GE(InterpState &S, CodePtr OpPC)
Definition: Interp.h:252
clang::CodeGen::CodeGenFunction::EmitStoreOfScalar
void EmitStoreOfScalar(llvm::Value *Value, Address Addr, bool Volatile, QualType Ty, AlignmentSource Source=AlignmentSource::Type, bool isInit=false, bool isNontemporal=false)
EmitStoreOfScalar - Store a scalar value to an address, taking care to appropriately convert from the...
Definition: CodeGenFunction.h:3456
clang::CodeGen::LValue::setNonGC
void setNonGC(bool Value)
Definition: CGValue.h:277
clang::CodeGen::CodeGenFunction::EmitAnyExpr
RValue EmitAnyExpr(const Expr *E, AggValueSlot aggSlot=AggValueSlot::ignored(), bool ignoreResult=false)
EmitAnyExpr - Emit code to compute the specified expression which can have any type.
Definition: CGExpr.cpp:194
clang::CodeGen::CodeGenFunction::pushFullExprCleanup
void pushFullExprCleanup(CleanupKind kind, As... A)
pushFullExprCleanup - Push a cleanup to be run at the end of the current full-expression.
Definition: CodeGenFunction.h:608
clang::Expr::isGLValue
bool isGLValue() const
Definition: Expr.h:261
clang::CodeGen::CodeGenFunction::EmitInheritedCXXConstructorCall
void EmitInheritedCXXConstructorCall(const CXXConstructorDecl *D, bool ForVirtualBase, Address This, bool InheritedFromVBase, const CXXInheritedCtorInitExpr *E)
Emit a call to a constructor inherited from a base class, passing the current constructor&#39;s arguments...
Definition: CGClass.cpp:2180
clang::InitListExpr
Describes an C or C++ initializer list.
Definition: Expr.h:4403
clang::CXXTypeidExpr
A C++ typeid expression (C++ [expr.typeid]), which gets the type_info that corresponds to the supplie...
Definition: ExprCXX.h:764
clang::CodeGen::CodeGenFunction::pushRegularPartialArrayCleanup
void pushRegularPartialArrayCleanup(llvm::Value *arrayBegin, llvm::Value *arrayEnd, QualType elementType, CharUnits elementAlignment, Destroyer *destroyer)
pushRegularPartialArrayCleanup - Push an EH cleanup to destroy already-constructed elements of the gi...
Definition: CGDecl.cpp:2297
clang::CodeGen::CodeGenFunction::hasScalarEvaluationKind
static bool hasScalarEvaluationKind(QualType T)
Definition: CodeGenFunction.h:2062
clang::CodeGen::AggValueSlot::IsNotDestructed
Definition: CGValue.h:493
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::ComparisonCategoryInfo::isPartial
bool isPartial() const
True iff the comparison is not totally ordered.
Definition: ComparisonCategories.h:143
clang::CharUnits::getAsAlign
llvm::Align getAsAlign() const
getAsAlign - Returns Quantity as a valid llvm::Align, Beware llvm::Align assumes power of two 8-bit b...
Definition: CharUnits.h:183
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::LambdaExpr::capture_init_begin
capture_init_iterator capture_init_begin()
Retrieve the first initialization argument for this lambda expression (which initializes the first ca...
Definition: ExprCXX.h:1963
clang::CodeGen::Address::getAlignment
CharUnits getAlignment() const
Return the alignment of this pointer.
Definition: Address.h:66
clang::CodeGen::RValue::isComplex
bool isComplex() const
Definition: CGValue.h:53
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::CodeGenFunction::needsEHCleanup
bool needsEHCleanup(QualType::DestructionKind kind)
Determines whether an EH cleanup is required to destroy a type with the given destruction kind...
Definition: CodeGenFunction.h:1720
clang::CXXInheritedCtorInitExpr::constructsVBase
bool constructsVBase() const
Determine whether this constructor is actually constructing a base class (rather than a complete obje...
Definition: ExprCXX.h:1652
clang::CodeGen::CGBuilderTy::CreateMemCpy
llvm::CallInst * CreateMemCpy(Address Dest, Address Src, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:274
clang::CodeGen::CodeGenFunction::EmitLambdaVLACapture
void EmitLambdaVLACapture(const VariableArrayType *VAT, LValue LV)
Definition: CodeGenFunction.h:1870
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
clang::RecordDecl::field_begin
field_iterator field_begin() const
Definition: Decl.cpp:4425
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::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:3150
clang::CXXBindTemporaryExpr
Represents binding an expression to a temporary.
Definition: ExprCXX.h:1373
clang::CodeGen::LValue::isSimple
bool isSimple() const
Definition: CGValue.h:252
clang::CodeGen::CodeGenFunction::EmitAtomicExpr
RValue EmitAtomicExpr(AtomicExpr *E)
Definition: CGAtomic.cpp:782
clang::CXXBindTemporaryExpr::getTemporary
CXXTemporary * getTemporary()
Definition: ExprCXX.h:1392
clang::CodeGen::ConstantEmitter
Definition: ConstantEmitter.h:23
clang::LambdaExpr
A C++ lambda expression, which produces a function object (of unspecified type) that can be invoked l...
Definition: ExprCXX.h:1818
clang::CodeGen::CodeGenTypeCache::getPointerAlign
CharUnits getPointerAlign() const
Definition: CodeGenTypeCache.h:108
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::FloatingLiteral
Definition: Expr.h:1583
clang::CodeGen::CodeGenFunction::CreateTempAlloca
llvm::AllocaInst * CreateTempAlloca(llvm::Type *Ty, const Twine &Name="tmp", llvm::Value *ArraySize=nullptr)
CreateTempAlloca - This creates an alloca and inserts it into the entry block if ArraySize is nullptr...
Definition: CGExpr.cpp:106
clang::ComparisonCategories::getInfoForType
const ComparisonCategoryInfo & getInfoForType(QualType Ty) const
Return the comparison category information as specified by getCategoryForType(Ty).
Definition: ComparisonCategories.cpp:159
clang::CodeGen::CodeGenFunction::callCStructMoveConstructor
void callCStructMoveConstructor(LValue Dst, LValue Src)
Definition: CGNonTrivialStruct.cpp:912
clang::CodeGen::RValue::getAggregateAddress
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:71
clang::CXXDefaultArgExpr
A default argument (C++ [dcl.fct.default]).
Definition: ExprCXX.h:1202
clang::CodeGen::AggValueSlot::IsAliased
Definition: CGValue.h:492
clang::CodeGen::CodeGenFunction::ConditionalEvaluation::begin
void begin(CodeGenFunction &CGF)
Definition: CodeGenFunction.h:1024
clang::CodeGen::CodeGenFunction::TCK_Load
Checking the operand of a load. Must be suitably sized and aligned.
Definition: CodeGenFunction.h:2600
clang::CodeGen::CodeGenModule::isTypeConstant
bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor)
isTypeConstant - Determine whether an object of this type can be emitted as a constant.
Definition: CodeGenModule.cpp:3410
clang::CXXDefaultInitExpr::getExpr
const Expr * getExpr() const
Get the initialization expression that will be used.
Definition: ExprCXX.h:1307
clang::CodeGen::CodeGenFunction::EmitObjCMessageExpr
RValue EmitObjCMessageExpr(const ObjCMessageExpr *E, ReturnValueSlot Return=ReturnValueSlot())
Definition: CGObjC.cpp:500
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:542
clang::CXXRecordDecl::isTriviallyCopyable
bool isTriviallyCopyable() const
Determine whether this class is considered trivially copyable per (C++11 [class]p6).
Definition: DeclCXX.cpp:550
clang::CodeGen::Address::isValid
bool isValid() const
Definition: Address.h:35
clang::CodeGen::CodeGenFunction::EmitCXXConstructExpr
void EmitCXXConstructExpr(const CXXConstructExpr *E, AggValueSlot Dest)
Definition: CGExprCXX.cpp:581
clang::CharUnits::One
static CharUnits One()
One - Construct a CharUnits quantity of one.
Definition: CharUnits.h:58
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1627
clang::CodeGen::AggValueSlot::IsDestructed
Definition: CGValue.h:493
clang::CastKind
CastKind
CastKind - The kind of operation required for a conversion.
Definition: OperationKinds.h:20
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::DesignatedInitUpdateExpr::getUpdater
InitListExpr * getUpdater() const
Definition: Expr.h:4995
clang::CharUnits::getQuantity
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
clang::ConstantExpr
ConstantExpr - An expression that occurs in a constant context and optionally the result of evaluatin...
Definition: Expr.h:978
clang::VAArgExpr
Represents a call to the builtin function __builtin_va_arg.
Definition: Expr.h:4244
clang::AbstractConditionalOperator::getCond
Expr * getCond() const
Definition: Expr.h:3891
clang::CodeGen::CodeGenTypes::isPointerZeroInitializable
bool isPointerZeroInitializable(QualType T)
Check if the pointer type can be zero-initialized (in the C++ sense) with an LLVM zeroinitializer...
Definition: CodeGenTypes.cpp:792
clang::ASTRecordLayout
ASTRecordLayout - This class contains layout information for one RecordDecl, which is a struct/union/...
Definition: RecordLayout.h:38
clang::Expr::HasSideEffects
bool HasSideEffects(const ASTContext &Ctx, bool IncludePossibleEffects=true) const
HasSideEffects - This routine returns true for all those expressions which have any effect other than...
Definition: Expr.cpp:3396
clang::CodeGen::CodeGenFunction::getEvaluationKind
static TypeEvaluationKind getEvaluationKind(QualType T)
getEvaluationKind - Return the TypeEvaluationKind of QualType T.
Definition: CodeGenFunction.cpp:237
clang::CodeGen::CodeGenModule::getObjCRuntime
CGObjCRuntime & getObjCRuntime()
Return a reference to the configured Objective-C runtime.
Definition: CodeGenModule.h:572
clang::QualType::isNonTrivialToPrimitiveDestructiveMove
PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const
Check if this is a non-trivial type that would cause a C struct transitively containing this type to ...
Definition: Type.cpp:2379
clang::CXXScalarValueInitExpr
An expression "T()" which creates a value-initialized rvalue of type T, which is a non-class type...
Definition: ExprCXX.h:2053
clang::CodeGen::CodeGenFunction::callCStructMoveAssignmentOperator
void callCStructMoveAssignmentOperator(LValue Dst, LValue Src)
Definition: CGNonTrivialStruct.cpp:924
clang::Expr
This represents one expression.
Definition: Expr.h:108
clang::CodeGen::AggValueSlot::forLValue
static AggValueSlot forLValue(const LValue &LV, CodeGenFunction &CGF, IsDestructed_t isDestructed, NeedsGCBarriers_t needsGC, IsAliased_t isAliased, Overlap_t mayOverlap, IsZeroed_t isZeroed=IsNotZeroed, IsSanitizerChecked_t isChecked=IsNotSanitizerChecked)
Definition: CGValue.h:543
clang::ExprValueKind
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:122
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::AggValueSlot::getQualifiers
Qualifiers getQualifiers() const
Definition: CGValue.h:558
clang::CodeGen::CodeGenFunction::RunCleanupsScope
Enters a new scope for capturing cleanups, all of which will be executed once the scope is exited...
Definition: CodeGenFunction.h:709
clang::CPlusPlus
Definition: LangStandard.h:47
clang::CodeGen::RValue::getComplexVal
std::pair< llvm::Value *, llvm::Value * > getComplexVal() const
getComplexVal - Return the real/imag components of this complex value.
Definition: CGValue.h:66
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:7067
clang::DesignatedInitUpdateExpr
Definition: Expr.h:4973
V
#define V(N, I)
Definition: ASTContext.h:2941
clang::CodeGen::CodeGenFunction::EmitCompoundStmt
Address EmitCompoundStmt(const CompoundStmt &S, bool GetLast=false, AggValueSlot AVS=AggValueSlot::ignored())
EmitCompoundStmt - Emit a compound statement {..} node.
Definition: CGStmt.cpp:387
clang::InitListExpr::getNumInits
unsigned getNumInits() const
Definition: Expr.h:4433
clang::ArrayInitLoopExpr::getSubExpr
Expr * getSubExpr() const
Get the initializer to use for each array element.
Definition: Expr.h:5049
clang::CodeGen::CodeGenFunction::CreateAggTemp
AggValueSlot CreateAggTemp(QualType T, const Twine &Name="tmp")
CreateAggTemp - Create a temporary memory object for the given aggregate type.
Definition: CodeGenFunction.h:2267
CGCXXABI.h
clang::RecordDecl::field_end
field_iterator field_end() const
Definition: Decl.h:3966
CGObjCRuntime.h
clang::CodeGen::Address::getType
llvm::PointerType * getType() const
Return the type of the pointer value.
Definition: Address.h:43
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::Type::isAnyComplexType
bool isAnyComplexType() const
Definition: Type.h:6602
clang::CharUnits::fromQuantity
static CharUnits fromQuantity(QuantityType Quantity)
fromQuantity - Construct a CharUnits quantity from a raw integer type.
Definition: CharUnits.h:63
clang::CodeGen::AggValueSlot::MayOverlap
Definition: CGValue.h:495
clang::Expr::getType
QualType getType() const
Definition: Expr.h:137
clang::CodeGen::CodeGenFunction::StmtExprEvaluation
An RAII object to record that we&#39;re evaluating a statement expression.
Definition: CodeGenFunction.h:1056
StmtVisitor.h
clang::CodeGen::LValue::getTBAAInfo
TBAAAccessInfo getTBAAInfo() const
Definition: CGValue.h:308
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::ObjCMessageExpr
An expression that sends a message to the given Objective-C object or class.
Definition: ExprObjC.h:950
clang::CodeGen::CGBuilderTy::CreateMemSet
llvm::CallInst * CreateMemSet(Address Dest, llvm::Value *Value, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:296
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::ast_matchers::atomicType
const AstTypeMatcher< AtomicType > atomicType
Matches atomic types.
Definition: ASTMatchersInternal.cpp:864
clang::CodeGen::CodeGenFunction::CallLifetimeEnd
Definition: CodeGenFunction.h:504
clang::SubstNonTypeTemplateParmExpr
Represents a reference to a non-type template parameter that has been substituted with a template arg...
Definition: ExprCXX.h:4209
clang::CodeGen::CodeGenFunction::CXXDefaultInitExprScope
The scope of a CXXDefaultInitExpr.
Definition: CodeGenFunction.h:1446
clang::CXXRecordDecl::hasTrivialCopyConstructor
bool hasTrivialCopyConstructor() const
Determine whether this class has a trivial copy constructor (C++ [class.copy]p6, C++11 [class...
Definition: DeclCXX.h:1181
clang::AbstractConditionalOperator::getTrueExpr
Expr * getTrueExpr() const
Definition: Expr.h:3897
clang::ParenExpr::getSubExpr
const Expr * getSubExpr() const
Definition: Expr.h:2010
clang::CXXBindTemporaryExpr::getSubExpr
const Expr * getSubExpr() const
Definition: ExprCXX.h:1396
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:674
clang::CodeGen::CodeGenFunction::EmitAtomicLoad
RValue EmitAtomicLoad(LValue LV, SourceLocation SL, AggValueSlot Slot=AggValueSlot::ignored())
Definition: CGAtomic.cpp:1530
CodeGenFunction.h
clang::CodeGen::CodeGenFunction::callCStructCopyAssignmentOperator
void callCStructCopyAssignmentOperator(LValue Dst, LValue Src)
Definition: CGNonTrivialStruct.cpp:899
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4505
clang::ASTRecordLayout::getFieldOffset
uint64_t getFieldOffset(unsigned FieldNo) const
getFieldOffset - Get the offset of the given field index, in bits.
Definition: RecordLayout.h:190
clang::CXXStdInitializerListExpr::getSubExpr
Expr * getSubExpr()
Definition: ExprCXX.h:732
clang::CodeGen::CodeGenFunction::ArrayInitLoopExprScope
The scope of an ArrayInitLoopExpr.
Definition: CodeGenFunction.h:1474
clang::ComparisonCategoryInfo::getGreater
const ValueInfo * getGreater() const
Definition: ComparisonCategories.h:164
clang::OpaqueValueExpr
OpaqueValueExpr - An expression referring to an opaque object of a fixed type and value class...
Definition: Expr.h:1075
clang::CodeGen::CGBuilderTy::CreateBitCast
Address CreateBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:141
clang::DesignatedInitUpdateExpr::getBase
Expr * getBase() const
Definition: Expr.h:4992
CK_Equal
Definition: CGExprAgg.cpp:918
Kind
Kind
Definition: ChrootChecker.cpp:29
Attr.h
clang::CXXInheritedCtorInitExpr
Represents a call to an inherited base class constructor from an inheriting constructor.
Definition: ExprCXX.h:1613
clang::PseudoObjectExpr
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5715
clang::CXXInheritedCtorInitExpr::inheritedFromVBase
bool inheritedFromVBase() const
Determine whether the inherited constructor is inherited from a virtual base of the object we constru...
Definition: ExprCXX.h:1662
clang::CodeGen::CodeGenFunction::pushDestroy
void pushDestroy(QualType::DestructionKind dtorKind, Address addr, QualType type)
pushDestroy - Push the standard destructor for the given type as at least a normal cleanup...
Definition: CGDecl.cpp:2055
clang::CXXRecordDecl::hasTrivialCopyAssignment
bool hasTrivialCopyAssignment() const
Determine whether this class has a trivial copy assignment operator (C++ [class.copy]p11, C++11 [class.copy]p25)
Definition: DeclCXX.h:1231
clang::CodeGen::CodeGenFunction::LValueIsSuitableForInlineAtomic
bool LValueIsSuitableForInlineAtomic(LValue Src)
An LValue is a candidate for having its loads and stores be made atomic if we are operating under /vo...
Definition: CGAtomic.cpp:1517
clang::QualType::getAddressSpace
LangAS getAddressSpace() const
Return the address space of this type.
Definition: Type.h:6377
clang::CodeGen::EHScopeStack::stable_iterator
A saved depth on the scope stack.
Definition: EHScopeStack.h:106
clang::UnaryOperator::getSubExpr
Expr * getSubExpr() const
Definition: Expr.h:2076
clang::CodeGen::CodeGenFunction::EmitCheckedLValue
LValue EmitCheckedLValue(const Expr *E, TypeCheckKind TCK)
Same as EmitLValue but additionally we generate checking code to guard against undefined behavior...
Definition: CGExpr.cpp:1210
clang::CastExpr::getCastKind
CastKind getCastKind() const
Definition: Expr.h:3196
clang::ComparisonCategoryInfo::getLess
const ValueInfo * getLess() const
Definition: ComparisonCategories.h:161
clang::CodeGen::LValue::getPointer
llvm::Value * getPointer(CodeGenFunction &CGF) const
Definition: CGValue.h:323
clang::CodeGen::CodeGenFunction::EmitAggExprToLValue
LValue EmitAggExprToLValue(const Expr *E)
EmitAggExprToLValue - Emit the computation of the specified expression of aggregate type into a tempo...
Definition: CGExprAgg.cpp:1851
clang::CodeGen::CodeGenFunction::DeactivateCleanupBlock
void DeactivateCleanupBlock(EHScopeStack::stable_iterator Cleanup, llvm::Instruction *DominatingIP)
DeactivateCleanupBlock - Deactivates the given cleanup block.
Definition: CGCleanup.cpp:1240
clang::QualType::PCK_Struct
The type is a struct containing a field whose type is neither PCK_Trivial nor PCK_VolatileTrivial.
Definition: Type.h:1146
clang::CodeGen::AggValueSlot
An aggregate value slot.
Definition: CGValue.h:439
clang::CodeGen::CodeGenFunction::EmitLifetimeStart
llvm::Value * EmitLifetimeStart(uint64_t Size, llvm::Value *Addr)
Emit a lifetime.begin marker if some criteria are satisfied.
Definition: CGDecl.cpp:1290
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::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:5822
clang::ASTContext::getAsConstantArrayType
const ConstantArrayType * getAsConstantArrayType(QualType T) const
Definition: ASTContext.h:2466
clang::StmtVisitor
StmtVisitor - This class implements a simple visitor for Stmt subclasses.
Definition: StmtVisitor.h:183
clang::ASTContext::getAsArrayType
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
Definition: ASTContext.cpp:5711
clang::AtomicExpr
AtomicExpr - Variadic atomic builtins: __atomic_exchange, __atomic_fetch_*, __atomic_load, __atomic_store, and __atomic_compare_exchange_*, for the similarly-named C++11 instructions, and __c11 variants for <stdatomic.h>, and corresponding __opencl_atomic_* for OpenCL 2.0.
Definition: Expr.h:5849
clang::CodeGen::CodeGenFunction::EmitCXXTemporary
void EmitCXXTemporary(const CXXTemporary *Temporary, QualType TempType, Address Ptr)
Emits all the code to cause the given temporary to be cleaned up.
Definition: CGCleanup.cpp:1272
CheckAggExprForMemSetUse
static void CheckAggExprForMemSetUse(AggValueSlot &Slot, const Expr *E, CodeGenFunction &CGF)
CheckAggExprForMemSetUse - If the initializer is large and has a lot of zeros in it, emit a memset and avoid storing the individual zeros.
Definition: CGExprAgg.cpp:1794
llvm::SmallVector
Definition: LLVM.h:35
clang::CodeGen::Address
An aligned address.
Definition: Address.h:24
clang::QualType::isDestructedType
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after...
Definition: Type.h:1174
clang::CodeGen::CodeGenFunction::EmitPointerToDataMemberBinaryExpr
LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E)
Definition: CGExpr.cpp:5045
clang::QualType::isNonTrivialToPrimitiveCopy
PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const
Check if this is a non-trivial type that would cause a C struct transitively containing this type to ...
Definition: Type.cpp:2361
clang::AtomicType
Definition: Type.h:6125
clang::CharacterLiteral
Definition: Expr.h:1530
clang::StmtExpr
StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}).
Definition: Expr.h:3954
clang::TypeInfo
Definition: ASTContext.h:156
clang::CodeGen::LValue::getType
QualType getType() const
Definition: CGValue.h:264
clang::CodeGen::CodeGenFunction::EmitCallExpr
RValue EmitCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue=ReturnValueSlot())
Definition: CGExpr.cpp:4585
Emitter
clang::InitListExpr::getArrayFiller
Expr * getArrayFiller()
If this initializer list initializes an array with more elements than there are initializers in the l...
Definition: Expr.h:4497
clang::QualType::DestructionKind
DestructionKind
Definition: Type.h:1162
clang::ASTContext::hasSameUnqualifiedType
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2345
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::CompoundLiteralExpr::getInitializer
const Expr * getInitializer() const
Definition: Expr.h:3103
clang::BinaryOperator::getLHS
Expr * getLHS() const
Definition: Expr.h:3474
clang::LangOptions::NonGC
Definition: LangOptions.h:57
clang::CodeGen::AggValueSlot::setExternallyDestructed
void setExternallyDestructed(bool destructed=true)
Definition: CGValue.h:554
clang::GenericSelectionExpr
Represents a C11 generic selection.
Definition: Expr.h:5234
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::CGCXXABI::EmitMemberPointerComparison
virtual llvm::Value * EmitMemberPointerComparison(CodeGenFunction &CGF, llvm::Value *L, llvm::Value *R, const MemberPointerType *MPT, bool Inequality)
Emit a comparison between two member pointers. Returns an i1.
Definition: CGCXXABI.cpp:81
clang::CodeGen::RValue::getScalarVal
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:59
clang::QualType::withVolatile
QualType withVolatile() const
Definition: Type.h:834
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::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:280
clang::CodeGen::AggValueSlot::setVolatile
void setVolatile(bool flag)
Definition: CGValue.h:564
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::PredefinedExpr
[C99 6.4.2.2] - A predefined identifier such as func.
Definition: Expr.h:1903
clang::CodeGen::CodeGenFunction::getOverlapForBaseInit
AggValueSlot::Overlap_t getOverlapForBaseInit(const CXXRecordDecl *RD, const CXXRecordDecl *BaseRD, bool IsVirtual)
Determine whether a base class initialization may overlap some other object.
Definition: CGExprAgg.cpp:1881
clang::CodeGen::AggValueSlot::ignored
static AggValueSlot ignored()
ignored - Returns an aggregate value slot indicating that the aggregate value is being ignored...
Definition: CGValue.h:501
CompareKind
CompareKind
Definition: CGExprAgg.cpp:915
clang::CodeGen::CodeGenFunction::FieldConstructionScope
A scope within which we are constructing the fields of an object which might use a CXXDefaultInitExpr...
Definition: CodeGenFunction.h:1429
clang::CodeGen::CodeGenFunction::getOrCreateOpaqueLValueMapping
LValue getOrCreateOpaqueLValueMapping(const OpaqueValueExpr *e)
Given an opaque value expression, return its LValue mapping if it exists, otherwise create one...
Definition: CGExpr.cpp:4530
clang::CodeGen::CGBuilderTy::CreateAlignedLoad
llvm::LoadInst * CreateAlignedLoad(llvm::Value *Addr, CharUnits Align, const llvm::Twine &Name="")
Definition: CGBuilder.h:90
type
clang::CodeGen::CodeGenFunction::EmitPseudoObjectLValue
LValue EmitPseudoObjectLValue(const PseudoObjectExpr *e)
Definition: CGExpr.cpp:5177
clang::CXXRecordDecl::hasUserDeclaredConstructor
bool hasUserDeclaredConstructor() const
Determine whether this class has any user-declared constructors.
Definition: DeclCXX.h:747
clang::CoyieldExpr
Represents a &#39;co_yield&#39; expression.
Definition: ExprCXX.h:4786
clang::CXXDefaultArgExpr::getExpr
const Expr * getExpr() const
Definition: ExprCXX.h:1241
clang::cast
U cast(CodeGen::Address addr)
Definition: Address.h:108
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::CodeGenFunction::TCK_Store
Checking the destination of a store. Must be suitably sized and aligned.
Definition: CodeGenFunction.h:2602
clang::ComparisonCategoryInfo::Record
CXXRecordDecl * Record
The declaration for the comparison category type from the standard library.
Definition: ComparisonCategories.h:118
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2833
clang::CodeGen::LValue::isBitField
bool isBitField() const
Definition: CGValue.h:254
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::CallExpr::getCallReturnType
QualType getCallReturnType(const ASTContext &Ctx) const
getCallReturnType - Get the return type of the call expr.
Definition: Expr.cpp:1499
clang::CodeGen::CodeGenFunction::MakeAddrLValue
LValue MakeAddrLValue(Address Addr, QualType T, AlignmentSource Source=AlignmentSource::Type)
Definition: CodeGenFunction.h:2133
clang::DeclContext::specific_decl_iterator
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2053
clang::CodeGen::CodeGenFunction::EmitAggExpr
void EmitAggExpr(const Expr *E, AggValueSlot AS)
EmitAggExpr - Emit the computation of the specified expression of aggregate type. ...
Definition: CGExprAgg.cpp:1839
clang::CodeGen::CodeGenModule::EmitExplicitCastExprType
void EmitExplicitCastExprType(const ExplicitCastExpr *E, CodeGenFunction *CGF=nullptr)
Emit type info if type of an expression is a variably modified type.
Definition: CGExpr.cpp:1023
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::ComplexType
Complex values, per C99 6.2.5p11.
Definition: Type.h:2554
clang::ArraySubscriptExpr
ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting.
Definition: Expr.h:2462
clang::CodeGen::CodeGenFunction::getTypes
CodeGenTypes & getTypes() const
Definition: CodeGenFunction.h:1626
clang::AbstractConditionalOperator
AbstractConditionalOperator - An abstract base class for ConditionalOperator and BinaryConditionalOpe...
Definition: Expr.h:3690
clang::CodeGen::Address::getElementType
llvm::Type * getElementType() const
Return the type of the values stored in this address.
Definition: Address.h:51
clang::ConstantArrayType::getSize
const llvm::APInt & getSize() const
Definition: Type.h:2958
clang::QualType::DK_none
Definition: Type.h:1163
clang::Type::isAtomicType
bool isAtomicType() const
Definition: Type.h:6631
clang::CoawaitExpr
Represents a &#39;co_await&#39; expression.
Definition: ExprCXX.h:4699
clang::OpaqueValueExpr::isUnique
bool isUnique() const
Definition: Expr.h:1141
clang::CodeGen::CodeGenTypeCache::Int8PtrTy
llvm::PointerType * Int8PtrTy
Definition: CodeGenTypeCache.h:54
clang::CodeGen::RValue::getAggregatePointer
llvm::Value * getAggregatePointer() const
Definition: CGValue.h:76
clang::SubstNonTypeTemplateParmExpr::getReplacement
Expr * getReplacement() const
Definition: ExprCXX.h:4241
clang::CodeGen::CodeGenFunction::EmitScalarInit
void EmitScalarInit(const Expr *init, const ValueDecl *D, LValue lvalue, bool capturedByInit)
Definition: CGDecl.cpp:743
clang::ASTContext::hasSameType
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2321
clang::InternalLinkage
Internal linkage, which indicates that the entity can be referred to from within the translation unit...
Definition: Linkage.h:31
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:473
clang::CodeGen::AggValueSlot::IsZeroed
Definition: CGValue.h:494
clang::ObjCIvarRefExpr
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:546
clang::CXXDefaultInitExpr
A use of a default initializer in a constructor or in aggregate initialization.
Definition: ExprCXX.h:1279
clang::CodeGen::CodeGenTypeCache::PtrDiffTy
llvm::IntegerType * PtrDiffTy
Definition: CodeGenTypeCache.h:48
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2372
clang::CodeGen::AggValueSlot::mayOverlap
Overlap_t mayOverlap() const
Definition: CGValue.h:599
clang::CodeGen::CodeGenFunction::callCStructCopyConstructor
void callCStructCopyConstructor(LValue Dst, LValue Src)
Definition: CGNonTrivialStruct.cpp:887
EmitCompare
static llvm::Value * EmitCompare(CGBuilderTy &Builder, CodeGenFunction &CGF, const BinaryOperator *E, llvm::Value *LHS, llvm::Value *RHS, CompareKind Kind, const char *NameSuffix="")
Definition: CGExprAgg.cpp:921
DeclCXX.h
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:2836
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::Type::hasSignedIntegerRepresentation
bool hasSignedIntegerRepresentation() const
Determine whether this type has an signed integer representation of some sort, e.g., it is an signed integer type or a vector.
Definition: Type.cpp:1958
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:253
clang::ArrayInitLoopExpr
Represents a loop initializing the elements of an array.
Definition: Expr.h:5027
clang::ChooseExpr
ChooseExpr - GNU builtin-in function __builtin_choose_expr.
Definition: Expr.h:4130
CK_Less
Definition: CGExprAgg.cpp:916
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:233
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::ComparisonCategoryInfo::getEqualOrEquiv
const ValueInfo * getEqualOrEquiv() const
Definition: ComparisonCategories.h:158
clang::ASTRecordLayout::getNonVirtualSize
CharUnits getNonVirtualSize() const
getNonVirtualSize - Get the non-virtual size (in chars) of an object, which is the size of the object...
Definition: RecordLayout.h:202
clang::diag::kind
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:60
clang::StringLiteral
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1711
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2546
clang::CodeGen::ConstantEmitter::finalize
void finalize(llvm::GlobalVariable *global)
Definition: CGExprConstant.cpp:1567
clang::StmtVisitorBase< std::add_pointer, ImplClass, RetTy, ParamTys... >::Visit
RetTy Visit(PTR(Stmt) S, ParamTys... P)
Definition: StmtVisitor.h:43
clang::CodeGen::AggValueSlot::NeedsGCBarriers
Definition: CGValue.h:496
clang::CodeGen::CodeGenModule::getCXXABI
CGCXXABI & getCXXABI() const
Definition: CodeGenModule.h:691
clang::CodeGen::TBAAAccessInfo
Definition: CodeGenTBAA.h:42
clang::CodeGen::CodeGenFunction::hasVolatileMember
bool hasVolatileMember(QualType T)
hasVolatileMember - returns true if aggregate type has a volatile member.
Definition: CodeGenFunction.h:2323
clang::CodeGen::CodeGenFunction::EmitAggregateCopy
void EmitAggregateCopy(LValue Dest, LValue Src, QualType EltTy, AggValueSlot::Overlap_t MayOverlap, bool isVolatile=false)
EmitAggregateCopy - Emit an aggregate copy.
Definition: CGExprAgg.cpp:1902
clang::LambdaExpr::capture_init_end
capture_init_iterator capture_init_end()
Retrieve the iterator pointing one past the last initialization argument for this lambda expression...
Definition: ExprCXX.h:1975
clang::CXXRewrittenBinaryOperator
A rewritten comparison expression that was originally written using operator syntax.
Definition: ExprCXX.h:273
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1171
clang::CodeGen::RValue::get
static RValue get(llvm::Value *V)
Definition: CGValue.h:86
clang::TagDecl::isUnion
bool isUnion() const
Definition: Decl.h:3407
clang::BinaryOperator::getRHS
Expr * getRHS() const
Definition: Expr.h:3476
clang::LambdaExpr::const_capture_init_iterator
Expr *const * const_capture_init_iterator
Const iterator that walks over the capture initialization arguments.
Definition: ExprCXX.h:1949
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6504
clang::RecordDecl::hasObjectMember
bool hasObjectMember() const
Definition: Decl.h:3829
clang::CodeGen::CodeGenFunction::EmitLifetimeEnd
void EmitLifetimeEnd(llvm::Value *Size, llvm::Value *Addr)
Definition: CGDecl.cpp:1306
clang::CodeGen::TEK_Scalar
Definition: CodeGenFunction.h:106
clang::ASTContext::getTypeSizeInChars
CharUnits getTypeSizeInChars(QualType T) const
Return the size of the specified (complete) type T, in characters.
Definition: ASTContext.cpp:2383
clang::InitListExpr::getInitializedFieldInUnion
FieldDecl * getInitializedFieldInUnion()
If this initializes a union, specifies which field in the union to initialize.
Definition: Expr.h:4515
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:630
clang::CodeGen::CGBuilderTy
Definition: CGBuilder.h:44
clang::CodeGen::RValue::getAggregate
static RValue getAggregate(Address addr, bool isVolatile=false)
Definition: CGValue.h:107
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:167
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:258
clang::CodeGen::AggValueSlot::asRValue
RValue asRValue() const
Definition: CGValue.h:607
clang::CodeGen::CodeGenFunction::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenFunction.h:1640
clang::ASTContext::getTargetAddressSpace
unsigned getTargetAddressSpace(QualType T) const
Definition: ASTContext.h:2557
clang::ComparisonCategoryInfo::getUnordered
const ValueInfo * getUnordered() const
Definition: ComparisonCategories.h:167
clang::MaterializeTemporaryExpr::getSubExpr
Expr * getSubExpr() const
Retrieve the temporary-generating subexpression whose value will be materialized into a glvalue...
Definition: ExprCXX.h:4436
clang::ArrayInitLoopExpr::getArraySize
llvm::APInt getArraySize() const
Definition: Expr.h:5051
clang::ConstantArrayType
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2935
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
clang::ImplicitValueInitExpr
Represents an implicitly-generated value initialization of an object of a given type.
Definition: Expr.h:5117
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::CodeGen::CodeGenFunction::pushIrregularPartialArrayCleanup
void pushIrregularPartialArrayCleanup(llvm::Value *arrayBegin, Address arrayEndPointer, QualType elementType, CharUnits elementAlignment, Destroyer *destroyer)
pushIrregularPartialArrayCleanup - Push an EH cleanup to destroy already-constructed elements of the ...
Definition: CGDecl.cpp:2280
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
ConstantEmitter.h
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::ASTContext::getSizeType
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
Definition: ASTContext.cpp:5254
clang::ASTContext::CompCategories
ComparisonCategories CompCategories
Types and expressions required to build C++2a three-way comparisons using operator<=>, including the values return by builtin <=> operators.
Definition: ASTContext.h:2055