clang  15.0.0git
CGClass.cpp
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1 //===--- CGClass.cpp - Emit LLVM Code for C++ classes -----------*- C++ -*-===//
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 dealing with C++ code generation of classes
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "CGBlocks.h"
14 #include "CGCXXABI.h"
15 #include "CGDebugInfo.h"
16 #include "CGRecordLayout.h"
17 #include "CodeGenFunction.h"
18 #include "TargetInfo.h"
19 #include "clang/AST/Attr.h"
21 #include "clang/AST/CharUnits.h"
22 #include "clang/AST/DeclTemplate.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtCXX.h"
29 #include "llvm/IR/Intrinsics.h"
30 #include "llvm/IR/Metadata.h"
31 #include "llvm/Transforms/Utils/SanitizerStats.h"
32 
33 using namespace clang;
34 using namespace CodeGen;
35 
36 /// Return the best known alignment for an unknown pointer to a
37 /// particular class.
39  if (!RD->hasDefinition())
40  return CharUnits::One(); // Hopefully won't be used anywhere.
41 
42  auto &layout = getContext().getASTRecordLayout(RD);
43 
44  // If the class is final, then we know that the pointer points to an
45  // object of that type and can use the full alignment.
46  if (RD->isEffectivelyFinal())
47  return layout.getAlignment();
48 
49  // Otherwise, we have to assume it could be a subclass.
50  return layout.getNonVirtualAlignment();
51 }
52 
53 /// Return the smallest possible amount of storage that might be allocated
54 /// starting from the beginning of an object of a particular class.
55 ///
56 /// This may be smaller than sizeof(RD) if RD has virtual base classes.
58  if (!RD->hasDefinition())
59  return CharUnits::One();
60 
61  auto &layout = getContext().getASTRecordLayout(RD);
62 
63  // If the class is final, then we know that the pointer points to an
64  // object of that type and can use the full alignment.
65  if (RD->isEffectivelyFinal())
66  return layout.getSize();
67 
68  // Otherwise, we have to assume it could be a subclass.
69  return std::max(layout.getNonVirtualSize(), CharUnits::One());
70 }
71 
72 /// Return the best known alignment for a pointer to a virtual base,
73 /// given the alignment of a pointer to the derived class.
75  const CXXRecordDecl *derivedClass,
76  const CXXRecordDecl *vbaseClass) {
77  // The basic idea here is that an underaligned derived pointer might
78  // indicate an underaligned base pointer.
79 
80  assert(vbaseClass->isCompleteDefinition());
81  auto &baseLayout = getContext().getASTRecordLayout(vbaseClass);
82  CharUnits expectedVBaseAlign = baseLayout.getNonVirtualAlignment();
83 
84  return getDynamicOffsetAlignment(actualDerivedAlign, derivedClass,
85  expectedVBaseAlign);
86 }
87 
90  const CXXRecordDecl *baseDecl,
91  CharUnits expectedTargetAlign) {
92  // If the base is an incomplete type (which is, alas, possible with
93  // member pointers), be pessimistic.
94  if (!baseDecl->isCompleteDefinition())
95  return std::min(actualBaseAlign, expectedTargetAlign);
96 
97  auto &baseLayout = getContext().getASTRecordLayout(baseDecl);
98  CharUnits expectedBaseAlign = baseLayout.getNonVirtualAlignment();
99 
100  // If the class is properly aligned, assume the target offset is, too.
101  //
102  // This actually isn't necessarily the right thing to do --- if the
103  // class is a complete object, but it's only properly aligned for a
104  // base subobject, then the alignments of things relative to it are
105  // probably off as well. (Note that this requires the alignment of
106  // the target to be greater than the NV alignment of the derived
107  // class.)
108  //
109  // However, our approach to this kind of under-alignment can only
110  // ever be best effort; after all, we're never going to propagate
111  // alignments through variables or parameters. Note, in particular,
112  // that constructing a polymorphic type in an address that's less
113  // than pointer-aligned will generally trap in the constructor,
114  // unless we someday add some sort of attribute to change the
115  // assumed alignment of 'this'. So our goal here is pretty much
116  // just to allow the user to explicitly say that a pointer is
117  // under-aligned and then safely access its fields and vtables.
118  if (actualBaseAlign >= expectedBaseAlign) {
119  return expectedTargetAlign;
120  }
121 
122  // Otherwise, we might be offset by an arbitrary multiple of the
123  // actual alignment. The correct adjustment is to take the min of
124  // the two alignments.
125  return std::min(actualBaseAlign, expectedTargetAlign);
126 }
127 
129  assert(CurFuncDecl && "loading 'this' without a func declaration?");
130  auto *MD = cast<CXXMethodDecl>(CurFuncDecl);
131 
132  // Lazily compute CXXThisAlignment.
133  if (CXXThisAlignment.isZero()) {
134  // Just use the best known alignment for the parent.
135  // TODO: if we're currently emitting a complete-object ctor/dtor,
136  // we can always use the complete-object alignment.
137  CXXThisAlignment = CGM.getClassPointerAlignment(MD->getParent());
138  }
139 
140  llvm::Type *Ty = ConvertType(MD->getThisType()->getPointeeType());
141  return Address(LoadCXXThis(), Ty, CXXThisAlignment);
142 }
143 
144 /// Emit the address of a field using a member data pointer.
145 ///
146 /// \param E Only used for emergency diagnostics
147 Address
149  llvm::Value *memberPtr,
150  const MemberPointerType *memberPtrType,
151  LValueBaseInfo *BaseInfo,
152  TBAAAccessInfo *TBAAInfo) {
153  // Ask the ABI to compute the actual address.
154  llvm::Value *ptr =
155  CGM.getCXXABI().EmitMemberDataPointerAddress(*this, E, base,
156  memberPtr, memberPtrType);
157 
158  QualType memberType = memberPtrType->getPointeeType();
159  CharUnits memberAlign =
160  CGM.getNaturalTypeAlignment(memberType, BaseInfo, TBAAInfo);
161  memberAlign =
163  memberPtrType->getClass()->getAsCXXRecordDecl(),
164  memberAlign);
165  return Address(ptr, ConvertTypeForMem(memberPtrType->getPointeeType()),
166  memberAlign);
167 }
168 
170  const CXXRecordDecl *DerivedClass, CastExpr::path_const_iterator Start,
173 
174  const ASTContext &Context = getContext();
175  const CXXRecordDecl *RD = DerivedClass;
176 
177  for (CastExpr::path_const_iterator I = Start; I != End; ++I) {
178  const CXXBaseSpecifier *Base = *I;
179  assert(!Base->isVirtual() && "Should not see virtual bases here!");
180 
181  // Get the layout.
182  const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD);
183 
184  const auto *BaseDecl =
185  cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
186 
187  // Add the offset.
188  Offset += Layout.getBaseClassOffset(BaseDecl);
189 
190  RD = BaseDecl;
191  }
192 
193  return Offset;
194 }
195 
196 llvm::Constant *
200  assert(PathBegin != PathEnd && "Base path should not be empty!");
201 
202  CharUnits Offset =
203  computeNonVirtualBaseClassOffset(ClassDecl, PathBegin, PathEnd);
204  if (Offset.isZero())
205  return nullptr;
206 
207  llvm::Type *PtrDiffTy =
208  Types.ConvertType(getContext().getPointerDiffType());
209 
210  return llvm::ConstantInt::get(PtrDiffTy, Offset.getQuantity());
211 }
212 
213 /// Gets the address of a direct base class within a complete object.
214 /// This should only be used for (1) non-virtual bases or (2) virtual bases
215 /// when the type is known to be complete (e.g. in complete destructors).
216 ///
217 /// The object pointed to by 'This' is assumed to be non-null.
218 Address
220  const CXXRecordDecl *Derived,
221  const CXXRecordDecl *Base,
222  bool BaseIsVirtual) {
223  // 'this' must be a pointer (in some address space) to Derived.
224  assert(This.getElementType() == ConvertType(Derived));
225 
226  // Compute the offset of the virtual base.
228  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(Derived);
229  if (BaseIsVirtual)
230  Offset = Layout.getVBaseClassOffset(Base);
231  else
232  Offset = Layout.getBaseClassOffset(Base);
233 
234  // Shift and cast down to the base type.
235  // TODO: for complete types, this should be possible with a GEP.
236  Address V = This;
237  if (!Offset.isZero()) {
240  }
242 
243  return V;
244 }
245 
246 static Address
248  CharUnits nonVirtualOffset,
249  llvm::Value *virtualOffset,
250  const CXXRecordDecl *derivedClass,
251  const CXXRecordDecl *nearestVBase) {
252  // Assert that we have something to do.
253  assert(!nonVirtualOffset.isZero() || virtualOffset != nullptr);
254 
255  // Compute the offset from the static and dynamic components.
256  llvm::Value *baseOffset;
257  if (!nonVirtualOffset.isZero()) {
258  llvm::Type *OffsetType =
259  (CGF.CGM.getTarget().getCXXABI().isItaniumFamily() &&
261  ? CGF.Int32Ty
262  : CGF.PtrDiffTy;
263  baseOffset =
264  llvm::ConstantInt::get(OffsetType, nonVirtualOffset.getQuantity());
265  if (virtualOffset) {
266  baseOffset = CGF.Builder.CreateAdd(virtualOffset, baseOffset);
267  }
268  } else {
269  baseOffset = virtualOffset;
270  }
271 
272  // Apply the base offset.
273  llvm::Value *ptr = addr.getPointer();
274  unsigned AddrSpace = ptr->getType()->getPointerAddressSpace();
275  ptr = CGF.Builder.CreateBitCast(ptr, CGF.Int8Ty->getPointerTo(AddrSpace));
276  ptr = CGF.Builder.CreateInBoundsGEP(CGF.Int8Ty, ptr, baseOffset, "add.ptr");
277 
278  // If we have a virtual component, the alignment of the result will
279  // be relative only to the known alignment of that vbase.
280  CharUnits alignment;
281  if (virtualOffset) {
282  assert(nearestVBase && "virtual offset without vbase?");
283  alignment = CGF.CGM.getVBaseAlignment(addr.getAlignment(),
284  derivedClass, nearestVBase);
285  } else {
286  alignment = addr.getAlignment();
287  }
288  alignment = alignment.alignmentAtOffset(nonVirtualOffset);
289 
290  return Address(ptr, CGF.Int8Ty, alignment);
291 }
292 
294  Address Value, const CXXRecordDecl *Derived,
296  CastExpr::path_const_iterator PathEnd, bool NullCheckValue,
297  SourceLocation Loc) {
298  assert(PathBegin != PathEnd && "Base path should not be empty!");
299 
300  CastExpr::path_const_iterator Start = PathBegin;
301  const CXXRecordDecl *VBase = nullptr;
302 
303  // Sema has done some convenient canonicalization here: if the
304  // access path involved any virtual steps, the conversion path will
305  // *start* with a step down to the correct virtual base subobject,
306  // and hence will not require any further steps.
307  if ((*Start)->isVirtual()) {
308  VBase = cast<CXXRecordDecl>(
309  (*Start)->getType()->castAs<RecordType>()->getDecl());
310  ++Start;
311  }
312 
313  // Compute the static offset of the ultimate destination within its
314  // allocating subobject (the virtual base, if there is one, or else
315  // the "complete" object that we see).
317  VBase ? VBase : Derived, Start, PathEnd);
318 
319  // If there's a virtual step, we can sometimes "devirtualize" it.
320  // For now, that's limited to when the derived type is final.
321  // TODO: "devirtualize" this for accesses to known-complete objects.
322  if (VBase && Derived->hasAttr<FinalAttr>()) {
323  const ASTRecordLayout &layout = getContext().getASTRecordLayout(Derived);
324  CharUnits vBaseOffset = layout.getVBaseClassOffset(VBase);
325  NonVirtualOffset += vBaseOffset;
326  VBase = nullptr; // we no longer have a virtual step
327  }
328 
329  // Get the base pointer type.
330  llvm::Type *BaseValueTy = ConvertType((PathEnd[-1])->getType());
331  llvm::Type *BasePtrTy =
332  BaseValueTy->getPointerTo(Value.getType()->getPointerAddressSpace());
333 
334  QualType DerivedTy = getContext().getRecordType(Derived);
335  CharUnits DerivedAlign = CGM.getClassPointerAlignment(Derived);
336 
337  // If the static offset is zero and we don't have a virtual step,
338  // just do a bitcast; null checks are unnecessary.
339  if (NonVirtualOffset.isZero() && !VBase) {
340  if (sanitizePerformTypeCheck()) {
341  SanitizerSet SkippedChecks;
342  SkippedChecks.set(SanitizerKind::Null, !NullCheckValue);
343  EmitTypeCheck(TCK_Upcast, Loc, Value.getPointer(),
344  DerivedTy, DerivedAlign, SkippedChecks);
345  }
346  return Builder.CreateElementBitCast(Value, BaseValueTy);
347  }
348 
349  llvm::BasicBlock *origBB = nullptr;
350  llvm::BasicBlock *endBB = nullptr;
351 
352  // Skip over the offset (and the vtable load) if we're supposed to
353  // null-check the pointer.
354  if (NullCheckValue) {
355  origBB = Builder.GetInsertBlock();
356  llvm::BasicBlock *notNullBB = createBasicBlock("cast.notnull");
357  endBB = createBasicBlock("cast.end");
358 
359  llvm::Value *isNull = Builder.CreateIsNull(Value.getPointer());
360  Builder.CreateCondBr(isNull, endBB, notNullBB);
361  EmitBlock(notNullBB);
362  }
363 
364  if (sanitizePerformTypeCheck()) {
365  SanitizerSet SkippedChecks;
366  SkippedChecks.set(SanitizerKind::Null, true);
368  Value.getPointer(), DerivedTy, DerivedAlign, SkippedChecks);
369  }
370 
371  // Compute the virtual offset.
372  llvm::Value *VirtualOffset = nullptr;
373  if (VBase) {
374  VirtualOffset =
375  CGM.getCXXABI().GetVirtualBaseClassOffset(*this, Value, Derived, VBase);
376  }
377 
378  // Apply both offsets.
379  Value = ApplyNonVirtualAndVirtualOffset(*this, Value, NonVirtualOffset,
380  VirtualOffset, Derived, VBase);
381 
382  // Cast to the destination type.
383  Value = Builder.CreateElementBitCast(Value, BaseValueTy);
384 
385  // Build a phi if we needed a null check.
386  if (NullCheckValue) {
387  llvm::BasicBlock *notNullBB = Builder.GetInsertBlock();
388  Builder.CreateBr(endBB);
389  EmitBlock(endBB);
390 
391  llvm::PHINode *PHI = Builder.CreatePHI(BasePtrTy, 2, "cast.result");
392  PHI->addIncoming(Value.getPointer(), notNullBB);
393  PHI->addIncoming(llvm::Constant::getNullValue(BasePtrTy), origBB);
394  Value = Value.withPointer(PHI);
395  }
396 
397  return Value;
398 }
399 
400 Address
402  const CXXRecordDecl *Derived,
405  bool NullCheckValue) {
406  assert(PathBegin != PathEnd && "Base path should not be empty!");
407 
408  QualType DerivedTy =
409  getContext().getCanonicalType(getContext().getTagDeclType(Derived));
410  unsigned AddrSpace = BaseAddr.getAddressSpace();
411  llvm::Type *DerivedValueTy = ConvertType(DerivedTy);
412  llvm::Type *DerivedPtrTy = DerivedValueTy->getPointerTo(AddrSpace);
413 
414  llvm::Value *NonVirtualOffset =
415  CGM.GetNonVirtualBaseClassOffset(Derived, PathBegin, PathEnd);
416 
417  if (!NonVirtualOffset) {
418  // No offset, we can just cast back.
419  return Builder.CreateElementBitCast(BaseAddr, DerivedValueTy);
420  }
421 
422  llvm::BasicBlock *CastNull = nullptr;
423  llvm::BasicBlock *CastNotNull = nullptr;
424  llvm::BasicBlock *CastEnd = nullptr;
425 
426  if (NullCheckValue) {
427  CastNull = createBasicBlock("cast.null");
428  CastNotNull = createBasicBlock("cast.notnull");
429  CastEnd = createBasicBlock("cast.end");
430 
431  llvm::Value *IsNull = Builder.CreateIsNull(BaseAddr.getPointer());
432  Builder.CreateCondBr(IsNull, CastNull, CastNotNull);
433  EmitBlock(CastNotNull);
434  }
435 
436  // Apply the offset.
437  llvm::Value *Value = Builder.CreateBitCast(BaseAddr.getPointer(), Int8PtrTy);
438  Value = Builder.CreateInBoundsGEP(
439  Int8Ty, Value, Builder.CreateNeg(NonVirtualOffset), "sub.ptr");
440 
441  // Just cast.
442  Value = Builder.CreateBitCast(Value, DerivedPtrTy);
443 
444  // Produce a PHI if we had a null-check.
445  if (NullCheckValue) {
446  Builder.CreateBr(CastEnd);
447  EmitBlock(CastNull);
448  Builder.CreateBr(CastEnd);
449  EmitBlock(CastEnd);
450 
451  llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2);
452  PHI->addIncoming(Value, CastNotNull);
453  PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull);
454  Value = PHI;
455  }
456 
457  return Address(Value, DerivedValueTy, CGM.getClassPointerAlignment(Derived));
458 }
459 
461  bool ForVirtualBase,
462  bool Delegating) {
463  if (!CGM.getCXXABI().NeedsVTTParameter(GD)) {
464  // This constructor/destructor does not need a VTT parameter.
465  return nullptr;
466  }
467 
468  const CXXRecordDecl *RD = cast<CXXMethodDecl>(CurCodeDecl)->getParent();
469  const CXXRecordDecl *Base = cast<CXXMethodDecl>(GD.getDecl())->getParent();
470 
471  uint64_t SubVTTIndex;
472 
473  if (Delegating) {
474  // If this is a delegating constructor call, just load the VTT.
475  return LoadCXXVTT();
476  } else if (RD == Base) {
477  // If the record matches the base, this is the complete ctor/dtor
478  // variant calling the base variant in a class with virtual bases.
479  assert(!CGM.getCXXABI().NeedsVTTParameter(CurGD) &&
480  "doing no-op VTT offset in base dtor/ctor?");
481  assert(!ForVirtualBase && "Can't have same class as virtual base!");
482  SubVTTIndex = 0;
483  } else {
484  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
485  CharUnits BaseOffset = ForVirtualBase ?
486  Layout.getVBaseClassOffset(Base) :
487  Layout.getBaseClassOffset(Base);
488 
489  SubVTTIndex =
490  CGM.getVTables().getSubVTTIndex(RD, BaseSubobject(Base, BaseOffset));
491  assert(SubVTTIndex != 0 && "Sub-VTT index must be greater than zero!");
492  }
493 
495  // A VTT parameter was passed to the constructor, use it.
496  llvm::Value *VTT = LoadCXXVTT();
497  return Builder.CreateConstInBoundsGEP1_64(VoidPtrTy, VTT, SubVTTIndex);
498  } else {
499  // We're the complete constructor, so get the VTT by name.
500  llvm::GlobalValue *VTT = CGM.getVTables().GetAddrOfVTT(RD);
501  return Builder.CreateConstInBoundsGEP2_64(
502  VTT->getValueType(), VTT, 0, SubVTTIndex);
503  }
504 }
505 
506 namespace {
507  /// Call the destructor for a direct base class.
508  struct CallBaseDtor final : EHScopeStack::Cleanup {
509  const CXXRecordDecl *BaseClass;
510  bool BaseIsVirtual;
511  CallBaseDtor(const CXXRecordDecl *Base, bool BaseIsVirtual)
512  : BaseClass(Base), BaseIsVirtual(BaseIsVirtual) {}
513 
514  void Emit(CodeGenFunction &CGF, Flags flags) override {
515  const CXXRecordDecl *DerivedClass =
516  cast<CXXMethodDecl>(CGF.CurCodeDecl)->getParent();
517 
518  const CXXDestructorDecl *D = BaseClass->getDestructor();
519  // We are already inside a destructor, so presumably the object being
520  // destroyed should have the expected type.
521  QualType ThisTy = D->getThisObjectType();
522  Address Addr =
524  DerivedClass, BaseClass,
525  BaseIsVirtual);
526  CGF.EmitCXXDestructorCall(D, Dtor_Base, BaseIsVirtual,
527  /*Delegating=*/false, Addr, ThisTy);
528  }
529  };
530 
531  /// A visitor which checks whether an initializer uses 'this' in a
532  /// way which requires the vtable to be properly set.
533  struct DynamicThisUseChecker : ConstEvaluatedExprVisitor<DynamicThisUseChecker> {
535 
536  bool UsesThis;
537 
538  DynamicThisUseChecker(const ASTContext &C) : super(C), UsesThis(false) {}
539 
540  // Black-list all explicit and implicit references to 'this'.
541  //
542  // Do we need to worry about external references to 'this' derived
543  // from arbitrary code? If so, then anything which runs arbitrary
544  // external code might potentially access the vtable.
545  void VisitCXXThisExpr(const CXXThisExpr *E) { UsesThis = true; }
546  };
547 } // end anonymous namespace
548 
549 static bool BaseInitializerUsesThis(ASTContext &C, const Expr *Init) {
550  DynamicThisUseChecker Checker(C);
551  Checker.Visit(Init);
552  return Checker.UsesThis;
553 }
554 
556  const CXXRecordDecl *ClassDecl,
557  CXXCtorInitializer *BaseInit) {
558  assert(BaseInit->isBaseInitializer() &&
559  "Must have base initializer!");
560 
561  Address ThisPtr = CGF.LoadCXXThisAddress();
562 
563  const Type *BaseType = BaseInit->getBaseClass();
564  const auto *BaseClassDecl =
565  cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
566 
567  bool isBaseVirtual = BaseInit->isBaseVirtual();
568 
569  // If the initializer for the base (other than the constructor
570  // itself) accesses 'this' in any way, we need to initialize the
571  // vtables.
572  if (BaseInitializerUsesThis(CGF.getContext(), BaseInit->getInit()))
573  CGF.InitializeVTablePointers(ClassDecl);
574 
575  // We can pretend to be a complete class because it only matters for
576  // virtual bases, and we only do virtual bases for complete ctors.
577  Address V =
578  CGF.GetAddressOfDirectBaseInCompleteClass(ThisPtr, ClassDecl,
579  BaseClassDecl,
580  isBaseVirtual);
581  AggValueSlot AggSlot =
583  V, Qualifiers(),
587  CGF.getOverlapForBaseInit(ClassDecl, BaseClassDecl, isBaseVirtual));
588 
589  CGF.EmitAggExpr(BaseInit->getInit(), AggSlot);
590 
591  if (CGF.CGM.getLangOpts().Exceptions &&
592  !BaseClassDecl->hasTrivialDestructor())
593  CGF.EHStack.pushCleanup<CallBaseDtor>(EHCleanup, BaseClassDecl,
594  isBaseVirtual);
595 }
596 
598  auto *CD = dyn_cast<CXXConstructorDecl>(D);
599  if (!(CD && CD->isCopyOrMoveConstructor()) &&
601  return false;
602 
603  // We can emit a memcpy for a trivial copy or move constructor/assignment.
604  if (D->isTrivial() && !D->getParent()->mayInsertExtraPadding())
605  return true;
606 
607  // We *must* emit a memcpy for a defaulted union copy or move op.
608  if (D->getParent()->isUnion() && D->isDefaulted())
609  return true;
610 
611  return false;
612 }
613 
615  CXXCtorInitializer *MemberInit,
616  LValue &LHS) {
617  FieldDecl *Field = MemberInit->getAnyMember();
618  if (MemberInit->isIndirectMemberInitializer()) {
619  // If we are initializing an anonymous union field, drill down to the field.
620  IndirectFieldDecl *IndirectField = MemberInit->getIndirectMember();
621  for (const auto *I : IndirectField->chain())
622  LHS = CGF.EmitLValueForFieldInitialization(LHS, cast<FieldDecl>(I));
623  } else {
624  LHS = CGF.EmitLValueForFieldInitialization(LHS, Field);
625  }
626 }
627 
629  const CXXRecordDecl *ClassDecl,
630  CXXCtorInitializer *MemberInit,
631  const CXXConstructorDecl *Constructor,
632  FunctionArgList &Args) {
633  ApplyDebugLocation Loc(CGF, MemberInit->getSourceLocation());
634  assert(MemberInit->isAnyMemberInitializer() &&
635  "Must have member initializer!");
636  assert(MemberInit->getInit() && "Must have initializer!");
637 
638  // non-static data member initializers.
639  FieldDecl *Field = MemberInit->getAnyMember();
640  QualType FieldType = Field->getType();
641 
642  llvm::Value *ThisPtr = CGF.LoadCXXThis();
643  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
644  LValue LHS;
645 
646  // If a base constructor is being emitted, create an LValue that has the
647  // non-virtual alignment.
648  if (CGF.CurGD.getCtorType() == Ctor_Base)
649  LHS = CGF.MakeNaturalAlignPointeeAddrLValue(ThisPtr, RecordTy);
650  else
651  LHS = CGF.MakeNaturalAlignAddrLValue(ThisPtr, RecordTy);
652 
653  EmitLValueForAnyFieldInitialization(CGF, MemberInit, LHS);
654 
655  // Special case: if we are in a copy or move constructor, and we are copying
656  // an array of PODs or classes with trivial copy constructors, ignore the
657  // AST and perform the copy we know is equivalent.
658  // FIXME: This is hacky at best... if we had a bit more explicit information
659  // in the AST, we could generalize it more easily.
660  const ConstantArrayType *Array
661  = CGF.getContext().getAsConstantArrayType(FieldType);
662  if (Array && Constructor->isDefaulted() &&
663  Constructor->isCopyOrMoveConstructor()) {
664  QualType BaseElementTy = CGF.getContext().getBaseElementType(Array);
665  CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(MemberInit->getInit());
666  if (BaseElementTy.isPODType(CGF.getContext()) ||
668  unsigned SrcArgIndex =
669  CGF.CGM.getCXXABI().getSrcArgforCopyCtor(Constructor, Args);
670  llvm::Value *SrcPtr
671  = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(Args[SrcArgIndex]));
672  LValue ThisRHSLV = CGF.MakeNaturalAlignAddrLValue(SrcPtr, RecordTy);
673  LValue Src = CGF.EmitLValueForFieldInitialization(ThisRHSLV, Field);
674 
675  // Copy the aggregate.
676  CGF.EmitAggregateCopy(LHS, Src, FieldType, CGF.getOverlapForFieldInit(Field),
677  LHS.isVolatileQualified());
678  // Ensure that we destroy the objects if an exception is thrown later in
679  // the constructor.
680  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
681  if (CGF.needsEHCleanup(dtorKind))
682  CGF.pushEHDestroy(dtorKind, LHS.getAddress(CGF), FieldType);
683  return;
684  }
685  }
686 
687  CGF.EmitInitializerForField(Field, LHS, MemberInit->getInit());
688 }
689 
691  Expr *Init) {
692  QualType FieldType = Field->getType();
693  switch (getEvaluationKind(FieldType)) {
694  case TEK_Scalar:
695  if (LHS.isSimple()) {
696  EmitExprAsInit(Init, Field, LHS, false);
697  } else {
698  RValue RHS = RValue::get(EmitScalarExpr(Init));
699  EmitStoreThroughLValue(RHS, LHS);
700  }
701  break;
702  case TEK_Complex:
703  EmitComplexExprIntoLValue(Init, LHS, /*isInit*/ true);
704  break;
705  case TEK_Aggregate: {
707  LHS, *this, AggValueSlot::IsDestructed,
710  // Checks are made by the code that calls constructor.
712  EmitAggExpr(Init, Slot);
713  break;
714  }
715  }
716 
717  // Ensure that we destroy this object if an exception is thrown
718  // later in the constructor.
719  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
720  if (needsEHCleanup(dtorKind))
721  pushEHDestroy(dtorKind, LHS.getAddress(*this), FieldType);
722 }
723 
724 /// Checks whether the given constructor is a valid subject for the
725 /// complete-to-base constructor delegation optimization, i.e.
726 /// emitting the complete constructor as a simple call to the base
727 /// constructor.
729  const CXXConstructorDecl *Ctor) {
730 
731  // Currently we disable the optimization for classes with virtual
732  // bases because (1) the addresses of parameter variables need to be
733  // consistent across all initializers but (2) the delegate function
734  // call necessarily creates a second copy of the parameter variable.
735  //
736  // The limiting example (purely theoretical AFAIK):
737  // struct A { A(int &c) { c++; } };
738  // struct B : virtual A {
739  // B(int count) : A(count) { printf("%d\n", count); }
740  // };
741  // ...although even this example could in principle be emitted as a
742  // delegation since the address of the parameter doesn't escape.
743  if (Ctor->getParent()->getNumVBases()) {
744  // TODO: white-list trivial vbase initializers. This case wouldn't
745  // be subject to the restrictions below.
746 
747  // TODO: white-list cases where:
748  // - there are no non-reference parameters to the constructor
749  // - the initializers don't access any non-reference parameters
750  // - the initializers don't take the address of non-reference
751  // parameters
752  // - etc.
753  // If we ever add any of the above cases, remember that:
754  // - function-try-blocks will always exclude this optimization
755  // - we need to perform the constructor prologue and cleanup in
756  // EmitConstructorBody.
757 
758  return false;
759  }
760 
761  // We also disable the optimization for variadic functions because
762  // it's impossible to "re-pass" varargs.
763  if (Ctor->getType()->castAs<FunctionProtoType>()->isVariadic())
764  return false;
765 
766  // FIXME: Decide if we can do a delegation of a delegating constructor.
767  if (Ctor->isDelegatingConstructor())
768  return false;
769 
770  return true;
771 }
772 
773 // Emit code in ctor (Prologue==true) or dtor (Prologue==false)
774 // to poison the extra field paddings inserted under
775 // -fsanitize-address-field-padding=1|2.
777  ASTContext &Context = getContext();
778  const CXXRecordDecl *ClassDecl =
779  Prologue ? cast<CXXConstructorDecl>(CurGD.getDecl())->getParent()
780  : cast<CXXDestructorDecl>(CurGD.getDecl())->getParent();
781  if (!ClassDecl->mayInsertExtraPadding()) return;
782 
783  struct SizeAndOffset {
784  uint64_t Size;
785  uint64_t Offset;
786  };
787 
788  unsigned PtrSize = CGM.getDataLayout().getPointerSizeInBits();
789  const ASTRecordLayout &Info = Context.getASTRecordLayout(ClassDecl);
790 
791  // Populate sizes and offsets of fields.
793  for (unsigned i = 0, e = Info.getFieldCount(); i != e; ++i)
794  SSV[i].Offset =
796 
797  size_t NumFields = 0;
798  for (const auto *Field : ClassDecl->fields()) {
799  const FieldDecl *D = Field;
800  auto FieldInfo = Context.getTypeInfoInChars(D->getType());
801  CharUnits FieldSize = FieldInfo.Width;
802  assert(NumFields < SSV.size());
803  SSV[NumFields].Size = D->isBitField() ? 0 : FieldSize.getQuantity();
804  NumFields++;
805  }
806  assert(NumFields == SSV.size());
807  if (SSV.size() <= 1) return;
808 
809  // We will insert calls to __asan_* run-time functions.
810  // LLVM AddressSanitizer pass may decide to inline them later.
811  llvm::Type *Args[2] = {IntPtrTy, IntPtrTy};
812  llvm::FunctionType *FTy =
813  llvm::FunctionType::get(CGM.VoidTy, Args, false);
814  llvm::FunctionCallee F = CGM.CreateRuntimeFunction(
815  FTy, Prologue ? "__asan_poison_intra_object_redzone"
816  : "__asan_unpoison_intra_object_redzone");
817 
818  llvm::Value *ThisPtr = LoadCXXThis();
819  ThisPtr = Builder.CreatePtrToInt(ThisPtr, IntPtrTy);
820  uint64_t TypeSize = Info.getNonVirtualSize().getQuantity();
821  // For each field check if it has sufficient padding,
822  // if so (un)poison it with a call.
823  for (size_t i = 0; i < SSV.size(); i++) {
824  uint64_t AsanAlignment = 8;
825  uint64_t NextField = i == SSV.size() - 1 ? TypeSize : SSV[i + 1].Offset;
826  uint64_t PoisonSize = NextField - SSV[i].Offset - SSV[i].Size;
827  uint64_t EndOffset = SSV[i].Offset + SSV[i].Size;
828  if (PoisonSize < AsanAlignment || !SSV[i].Size ||
829  (NextField % AsanAlignment) != 0)
830  continue;
831  Builder.CreateCall(
832  F, {Builder.CreateAdd(ThisPtr, Builder.getIntN(PtrSize, EndOffset)),
833  Builder.getIntN(PtrSize, PoisonSize)});
834  }
835 }
836 
837 /// EmitConstructorBody - Emits the body of the current constructor.
840  const CXXConstructorDecl *Ctor = cast<CXXConstructorDecl>(CurGD.getDecl());
841  CXXCtorType CtorType = CurGD.getCtorType();
842 
844  CtorType == Ctor_Complete) &&
845  "can only generate complete ctor for this ABI");
846 
847  // Before we go any further, try the complete->base constructor
848  // delegation optimization.
849  if (CtorType == Ctor_Complete && IsConstructorDelegationValid(Ctor) &&
851  EmitDelegateCXXConstructorCall(Ctor, Ctor_Base, Args, Ctor->getEndLoc());
852  return;
853  }
854 
855  const FunctionDecl *Definition = nullptr;
856  Stmt *Body = Ctor->getBody(Definition);
857  assert(Definition == Ctor && "emitting wrong constructor body");
858 
859  // Enter the function-try-block before the constructor prologue if
860  // applicable.
861  bool IsTryBody = (Body && isa<CXXTryStmt>(Body));
862  if (IsTryBody)
863  EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
864 
866 
867  RunCleanupsScope RunCleanups(*this);
868 
869  // TODO: in restricted cases, we can emit the vbase initializers of
870  // a complete ctor and then delegate to the base ctor.
871 
872  // Emit the constructor prologue, i.e. the base and member
873  // initializers.
874  EmitCtorPrologue(Ctor, CtorType, Args);
875 
876  // Emit the body of the statement.
877  if (IsTryBody)
878  EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
879  else if (Body)
880  EmitStmt(Body);
881 
882  // Emit any cleanup blocks associated with the member or base
883  // initializers, which includes (along the exceptional path) the
884  // destructors for those members and bases that were fully
885  // constructed.
886  RunCleanups.ForceCleanup();
887 
888  if (IsTryBody)
889  ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
890 }
891 
892 namespace {
893  /// RAII object to indicate that codegen is copying the value representation
894  /// instead of the object representation. Useful when copying a struct or
895  /// class which has uninitialized members and we're only performing
896  /// lvalue-to-rvalue conversion on the object but not its members.
897  class CopyingValueRepresentation {
898  public:
899  explicit CopyingValueRepresentation(CodeGenFunction &CGF)
900  : CGF(CGF), OldSanOpts(CGF.SanOpts) {
901  CGF.SanOpts.set(SanitizerKind::Bool, false);
902  CGF.SanOpts.set(SanitizerKind::Enum, false);
903  }
904  ~CopyingValueRepresentation() {
905  CGF.SanOpts = OldSanOpts;
906  }
907  private:
908  CodeGenFunction &CGF;
909  SanitizerSet OldSanOpts;
910  };
911 } // end anonymous namespace
912 
913 namespace {
914  class FieldMemcpyizer {
915  public:
916  FieldMemcpyizer(CodeGenFunction &CGF, const CXXRecordDecl *ClassDecl,
917  const VarDecl *SrcRec)
918  : CGF(CGF), ClassDecl(ClassDecl), SrcRec(SrcRec),
919  RecLayout(CGF.getContext().getASTRecordLayout(ClassDecl)),
920  FirstField(nullptr), LastField(nullptr), FirstFieldOffset(0),
921  LastFieldOffset(0), LastAddedFieldIndex(0) {}
922 
923  bool isMemcpyableField(FieldDecl *F) const {
924  // Never memcpy fields when we are adding poisoned paddings.
925  if (CGF.getContext().getLangOpts().SanitizeAddressFieldPadding)
926  return false;
927  Qualifiers Qual = F->getType().getQualifiers();
928  if (Qual.hasVolatile() || Qual.hasObjCLifetime())
929  return false;
930  return true;
931  }
932 
933  void addMemcpyableField(FieldDecl *F) {
934  if (F->isZeroSize(CGF.getContext()))
935  return;
936  if (!FirstField)
937  addInitialField(F);
938  else
939  addNextField(F);
940  }
941 
942  CharUnits getMemcpySize(uint64_t FirstByteOffset) const {
943  ASTContext &Ctx = CGF.getContext();
944  unsigned LastFieldSize =
945  LastField->isBitField()
946  ? LastField->getBitWidthValue(Ctx)
947  : Ctx.toBits(
948  Ctx.getTypeInfoDataSizeInChars(LastField->getType()).Width);
949  uint64_t MemcpySizeBits = LastFieldOffset + LastFieldSize -
950  FirstByteOffset + Ctx.getCharWidth() - 1;
951  CharUnits MemcpySize = Ctx.toCharUnitsFromBits(MemcpySizeBits);
952  return MemcpySize;
953  }
954 
955  void emitMemcpy() {
956  // Give the subclass a chance to bail out if it feels the memcpy isn't
957  // worth it (e.g. Hasn't aggregated enough data).
958  if (!FirstField) {
959  return;
960  }
961 
962  uint64_t FirstByteOffset;
963  if (FirstField->isBitField()) {
964  const CGRecordLayout &RL =
965  CGF.getTypes().getCGRecordLayout(FirstField->getParent());
966  const CGBitFieldInfo &BFInfo = RL.getBitFieldInfo(FirstField);
967  // FirstFieldOffset is not appropriate for bitfields,
968  // we need to use the storage offset instead.
969  FirstByteOffset = CGF.getContext().toBits(BFInfo.StorageOffset);
970  } else {
971  FirstByteOffset = FirstFieldOffset;
972  }
973 
974  CharUnits MemcpySize = getMemcpySize(FirstByteOffset);
975  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
976  Address ThisPtr = CGF.LoadCXXThisAddress();
977  LValue DestLV = CGF.MakeAddrLValue(ThisPtr, RecordTy);
978  LValue Dest = CGF.EmitLValueForFieldInitialization(DestLV, FirstField);
979  llvm::Value *SrcPtr = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(SrcRec));
980  LValue SrcLV = CGF.MakeNaturalAlignAddrLValue(SrcPtr, RecordTy);
981  LValue Src = CGF.EmitLValueForFieldInitialization(SrcLV, FirstField);
982 
983  emitMemcpyIR(
984  Dest.isBitField() ? Dest.getBitFieldAddress() : Dest.getAddress(CGF),
985  Src.isBitField() ? Src.getBitFieldAddress() : Src.getAddress(CGF),
986  MemcpySize);
987  reset();
988  }
989 
990  void reset() {
991  FirstField = nullptr;
992  }
993 
994  protected:
995  CodeGenFunction &CGF;
996  const CXXRecordDecl *ClassDecl;
997 
998  private:
999  void emitMemcpyIR(Address DestPtr, Address SrcPtr, CharUnits Size) {
1000  DestPtr = CGF.Builder.CreateElementBitCast(DestPtr, CGF.Int8Ty);
1001  SrcPtr = CGF.Builder.CreateElementBitCast(SrcPtr, CGF.Int8Ty);
1002  CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, Size.getQuantity());
1003  }
1004 
1005  void addInitialField(FieldDecl *F) {
1006  FirstField = F;
1007  LastField = F;
1008  FirstFieldOffset = RecLayout.getFieldOffset(F->getFieldIndex());
1009  LastFieldOffset = FirstFieldOffset;
1010  LastAddedFieldIndex = F->getFieldIndex();
1011  }
1012 
1013  void addNextField(FieldDecl *F) {
1014  // For the most part, the following invariant will hold:
1015  // F->getFieldIndex() == LastAddedFieldIndex + 1
1016  // The one exception is that Sema won't add a copy-initializer for an
1017  // unnamed bitfield, which will show up here as a gap in the sequence.
1018  assert(F->getFieldIndex() >= LastAddedFieldIndex + 1 &&
1019  "Cannot aggregate fields out of order.");
1020  LastAddedFieldIndex = F->getFieldIndex();
1021 
1022  // The 'first' and 'last' fields are chosen by offset, rather than field
1023  // index. This allows the code to support bitfields, as well as regular
1024  // fields.
1025  uint64_t FOffset = RecLayout.getFieldOffset(F->getFieldIndex());
1026  if (FOffset < FirstFieldOffset) {
1027  FirstField = F;
1028  FirstFieldOffset = FOffset;
1029  } else if (FOffset >= LastFieldOffset) {
1030  LastField = F;
1031  LastFieldOffset = FOffset;
1032  }
1033  }
1034 
1035  const VarDecl *SrcRec;
1036  const ASTRecordLayout &RecLayout;
1037  FieldDecl *FirstField;
1038  FieldDecl *LastField;
1039  uint64_t FirstFieldOffset, LastFieldOffset;
1040  unsigned LastAddedFieldIndex;
1041  };
1042 
1043  class ConstructorMemcpyizer : public FieldMemcpyizer {
1044  private:
1045  /// Get source argument for copy constructor. Returns null if not a copy
1046  /// constructor.
1047  static const VarDecl *getTrivialCopySource(CodeGenFunction &CGF,
1048  const CXXConstructorDecl *CD,
1049  FunctionArgList &Args) {
1050  if (CD->isCopyOrMoveConstructor() && CD->isDefaulted())
1051  return Args[CGF.CGM.getCXXABI().getSrcArgforCopyCtor(CD, Args)];
1052  return nullptr;
1053  }
1054 
1055  // Returns true if a CXXCtorInitializer represents a member initialization
1056  // that can be rolled into a memcpy.
1057  bool isMemberInitMemcpyable(CXXCtorInitializer *MemberInit) const {
1058  if (!MemcpyableCtor)
1059  return false;
1060  FieldDecl *Field = MemberInit->getMember();
1061  assert(Field && "No field for member init.");
1062  QualType FieldType = Field->getType();
1063  CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(MemberInit->getInit());
1064 
1065  // Bail out on non-memcpyable, not-trivially-copyable members.
1066  if (!(CE && isMemcpyEquivalentSpecialMember(CE->getConstructor())) &&
1067  !(FieldType.isTriviallyCopyableType(CGF.getContext()) ||
1068  FieldType->isReferenceType()))
1069  return false;
1070 
1071  // Bail out on volatile fields.
1072  if (!isMemcpyableField(Field))
1073  return false;
1074 
1075  // Otherwise we're good.
1076  return true;
1077  }
1078 
1079  public:
1080  ConstructorMemcpyizer(CodeGenFunction &CGF, const CXXConstructorDecl *CD,
1081  FunctionArgList &Args)
1082  : FieldMemcpyizer(CGF, CD->getParent(), getTrivialCopySource(CGF, CD, Args)),
1083  ConstructorDecl(CD),
1084  MemcpyableCtor(CD->isDefaulted() &&
1085  CD->isCopyOrMoveConstructor() &&
1086  CGF.getLangOpts().getGC() == LangOptions::NonGC),
1087  Args(Args) { }
1088 
1089  void addMemberInitializer(CXXCtorInitializer *MemberInit) {
1090  if (isMemberInitMemcpyable(MemberInit)) {
1091  AggregatedInits.push_back(MemberInit);
1092  addMemcpyableField(MemberInit->getMember());
1093  } else {
1094  emitAggregatedInits();
1095  EmitMemberInitializer(CGF, ConstructorDecl->getParent(), MemberInit,
1096  ConstructorDecl, Args);
1097  }
1098  }
1099 
1100  void emitAggregatedInits() {
1101  if (AggregatedInits.size() <= 1) {
1102  // This memcpy is too small to be worthwhile. Fall back on default
1103  // codegen.
1104  if (!AggregatedInits.empty()) {
1105  CopyingValueRepresentation CVR(CGF);
1106  EmitMemberInitializer(CGF, ConstructorDecl->getParent(),
1107  AggregatedInits[0], ConstructorDecl, Args);
1108  AggregatedInits.clear();
1109  }
1110  reset();
1111  return;
1112  }
1113 
1114  pushEHDestructors();
1115  emitMemcpy();
1116  AggregatedInits.clear();
1117  }
1118 
1119  void pushEHDestructors() {
1120  Address ThisPtr = CGF.LoadCXXThisAddress();
1121  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
1122  LValue LHS = CGF.MakeAddrLValue(ThisPtr, RecordTy);
1123 
1124  for (unsigned i = 0; i < AggregatedInits.size(); ++i) {
1125  CXXCtorInitializer *MemberInit = AggregatedInits[i];
1126  QualType FieldType = MemberInit->getAnyMember()->getType();
1127  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
1128  if (!CGF.needsEHCleanup(dtorKind))
1129  continue;
1130  LValue FieldLHS = LHS;
1131  EmitLValueForAnyFieldInitialization(CGF, MemberInit, FieldLHS);
1132  CGF.pushEHDestroy(dtorKind, FieldLHS.getAddress(CGF), FieldType);
1133  }
1134  }
1135 
1136  void finish() {
1137  emitAggregatedInits();
1138  }
1139 
1140  private:
1141  const CXXConstructorDecl *ConstructorDecl;
1142  bool MemcpyableCtor;
1143  FunctionArgList &Args;
1144  SmallVector<CXXCtorInitializer*, 16> AggregatedInits;
1145  };
1146 
1147  class AssignmentMemcpyizer : public FieldMemcpyizer {
1148  private:
1149  // Returns the memcpyable field copied by the given statement, if one
1150  // exists. Otherwise returns null.
1151  FieldDecl *getMemcpyableField(Stmt *S) {
1152  if (!AssignmentsMemcpyable)
1153  return nullptr;
1154  if (BinaryOperator *BO = dyn_cast<BinaryOperator>(S)) {
1155  // Recognise trivial assignments.
1156  if (BO->getOpcode() != BO_Assign)
1157  return nullptr;
1158  MemberExpr *ME = dyn_cast<MemberExpr>(BO->getLHS());
1159  if (!ME)
1160  return nullptr;
1161  FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl());
1162  if (!Field || !isMemcpyableField(Field))
1163  return nullptr;
1164  Stmt *RHS = BO->getRHS();
1165  if (ImplicitCastExpr *EC = dyn_cast<ImplicitCastExpr>(RHS))
1166  RHS = EC->getSubExpr();
1167  if (!RHS)
1168  return nullptr;
1169  if (MemberExpr *ME2 = dyn_cast<MemberExpr>(RHS)) {
1170  if (ME2->getMemberDecl() == Field)
1171  return Field;
1172  }
1173  return nullptr;
1174  } else if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(S)) {
1175  CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(MCE->getCalleeDecl());
1176  if (!(MD && isMemcpyEquivalentSpecialMember(MD)))
1177  return nullptr;
1178  MemberExpr *IOA = dyn_cast<MemberExpr>(MCE->getImplicitObjectArgument());
1179  if (!IOA)
1180  return nullptr;
1181  FieldDecl *Field = dyn_cast<FieldDecl>(IOA->getMemberDecl());
1182  if (!Field || !isMemcpyableField(Field))
1183  return nullptr;
1184  MemberExpr *Arg0 = dyn_cast<MemberExpr>(MCE->getArg(0));
1185  if (!Arg0 || Field != dyn_cast<FieldDecl>(Arg0->getMemberDecl()))
1186  return nullptr;
1187  return Field;
1188  } else if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
1189  FunctionDecl *FD = dyn_cast<FunctionDecl>(CE->getCalleeDecl());
1190  if (!FD || FD->getBuiltinID() != Builtin::BI__builtin_memcpy)
1191  return nullptr;
1192  Expr *DstPtr = CE->getArg(0);
1193  if (ImplicitCastExpr *DC = dyn_cast<ImplicitCastExpr>(DstPtr))
1194  DstPtr = DC->getSubExpr();
1195  UnaryOperator *DUO = dyn_cast<UnaryOperator>(DstPtr);
1196  if (!DUO || DUO->getOpcode() != UO_AddrOf)
1197  return nullptr;
1198  MemberExpr *ME = dyn_cast<MemberExpr>(DUO->getSubExpr());
1199  if (!ME)
1200  return nullptr;
1201  FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl());
1202  if (!Field || !isMemcpyableField(Field))
1203  return nullptr;
1204  Expr *SrcPtr = CE->getArg(1);
1205  if (ImplicitCastExpr *SC = dyn_cast<ImplicitCastExpr>(SrcPtr))
1206  SrcPtr = SC->getSubExpr();
1207  UnaryOperator *SUO = dyn_cast<UnaryOperator>(SrcPtr);
1208  if (!SUO || SUO->getOpcode() != UO_AddrOf)
1209  return nullptr;
1210  MemberExpr *ME2 = dyn_cast<MemberExpr>(SUO->getSubExpr());
1211  if (!ME2 || Field != dyn_cast<FieldDecl>(ME2->getMemberDecl()))
1212  return nullptr;
1213  return Field;
1214  }
1215 
1216  return nullptr;
1217  }
1218 
1219  bool AssignmentsMemcpyable;
1220  SmallVector<Stmt*, 16> AggregatedStmts;
1221 
1222  public:
1223  AssignmentMemcpyizer(CodeGenFunction &CGF, const CXXMethodDecl *AD,
1224  FunctionArgList &Args)
1225  : FieldMemcpyizer(CGF, AD->getParent(), Args[Args.size() - 1]),
1226  AssignmentsMemcpyable(CGF.getLangOpts().getGC() == LangOptions::NonGC) {
1227  assert(Args.size() == 2);
1228  }
1229 
1230  void emitAssignment(Stmt *S) {
1231  FieldDecl *F = getMemcpyableField(S);
1232  if (F) {
1233  addMemcpyableField(F);
1234  AggregatedStmts.push_back(S);
1235  } else {
1236  emitAggregatedStmts();
1237  CGF.EmitStmt(S);
1238  }
1239  }
1240 
1241  void emitAggregatedStmts() {
1242  if (AggregatedStmts.size() <= 1) {
1243  if (!AggregatedStmts.empty()) {
1244  CopyingValueRepresentation CVR(CGF);
1245  CGF.EmitStmt(AggregatedStmts[0]);
1246  }
1247  reset();
1248  }
1249 
1250  emitMemcpy();
1251  AggregatedStmts.clear();
1252  }
1253 
1254  void finish() {
1255  emitAggregatedStmts();
1256  }
1257  };
1258 } // end anonymous namespace
1259 
1260 static bool isInitializerOfDynamicClass(const CXXCtorInitializer *BaseInit) {
1261  const Type *BaseType = BaseInit->getBaseClass();
1262  const auto *BaseClassDecl =
1263  cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
1264  return BaseClassDecl->isDynamicClass();
1265 }
1266 
1267 /// EmitCtorPrologue - This routine generates necessary code to initialize
1268 /// base classes and non-static data members belonging to this constructor.
1270  CXXCtorType CtorType,
1271  FunctionArgList &Args) {
1272  if (CD->isDelegatingConstructor())
1273  return EmitDelegatingCXXConstructorCall(CD, Args);
1274 
1275  const CXXRecordDecl *ClassDecl = CD->getParent();
1276 
1278  E = CD->init_end();
1279 
1280  // Virtual base initializers first, if any. They aren't needed if:
1281  // - This is a base ctor variant
1282  // - There are no vbases
1283  // - The class is abstract, so a complete object of it cannot be constructed
1284  //
1285  // The check for an abstract class is necessary because sema may not have
1286  // marked virtual base destructors referenced.
1287  bool ConstructVBases = CtorType != Ctor_Base &&
1288  ClassDecl->getNumVBases() != 0 &&
1289  !ClassDecl->isAbstract();
1290 
1291  // In the Microsoft C++ ABI, there are no constructor variants. Instead, the
1292  // constructor of a class with virtual bases takes an additional parameter to
1293  // conditionally construct the virtual bases. Emit that check here.
1294  llvm::BasicBlock *BaseCtorContinueBB = nullptr;
1295  if (ConstructVBases &&
1297  BaseCtorContinueBB =
1298  CGM.getCXXABI().EmitCtorCompleteObjectHandler(*this, ClassDecl);
1299  assert(BaseCtorContinueBB);
1300  }
1301 
1302  llvm::Value *const OldThis = CXXThisValue;
1303  for (; B != E && (*B)->isBaseInitializer() && (*B)->isBaseVirtual(); B++) {
1304  if (!ConstructVBases)
1305  continue;
1306  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1307  CGM.getCodeGenOpts().OptimizationLevel > 0 &&
1310  EmitBaseInitializer(*this, ClassDecl, *B);
1311  }
1312 
1313  if (BaseCtorContinueBB) {
1314  // Complete object handler should continue to the remaining initializers.
1315  Builder.CreateBr(BaseCtorContinueBB);
1316  EmitBlock(BaseCtorContinueBB);
1317  }
1318 
1319  // Then, non-virtual base initializers.
1320  for (; B != E && (*B)->isBaseInitializer(); B++) {
1321  assert(!(*B)->isBaseVirtual());
1322 
1323  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1324  CGM.getCodeGenOpts().OptimizationLevel > 0 &&
1327  EmitBaseInitializer(*this, ClassDecl, *B);
1328  }
1329 
1330  CXXThisValue = OldThis;
1331 
1332  InitializeVTablePointers(ClassDecl);
1333 
1334  // And finally, initialize class members.
1336  ConstructorMemcpyizer CM(*this, CD, Args);
1337  for (; B != E; B++) {
1338  CXXCtorInitializer *Member = (*B);
1339  assert(!Member->isBaseInitializer());
1340  assert(Member->isAnyMemberInitializer() &&
1341  "Delegating initializer on non-delegating constructor");
1342  CM.addMemberInitializer(Member);
1343  }
1344  CM.finish();
1345 }
1346 
1347 static bool
1348 FieldHasTrivialDestructorBody(ASTContext &Context, const FieldDecl *Field);
1349 
1350 static bool
1352  const CXXRecordDecl *BaseClassDecl,
1353  const CXXRecordDecl *MostDerivedClassDecl)
1354 {
1355  // If the destructor is trivial we don't have to check anything else.
1356  if (BaseClassDecl->hasTrivialDestructor())
1357  return true;
1358 
1359  if (!BaseClassDecl->getDestructor()->hasTrivialBody())
1360  return false;
1361 
1362  // Check fields.
1363  for (const auto *Field : BaseClassDecl->fields())
1364  if (!FieldHasTrivialDestructorBody(Context, Field))
1365  return false;
1366 
1367  // Check non-virtual bases.
1368  for (const auto &I : BaseClassDecl->bases()) {
1369  if (I.isVirtual())
1370  continue;
1371 
1372  const CXXRecordDecl *NonVirtualBase =
1373  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
1374  if (!HasTrivialDestructorBody(Context, NonVirtualBase,
1375  MostDerivedClassDecl))
1376  return false;
1377  }
1378 
1379  if (BaseClassDecl == MostDerivedClassDecl) {
1380  // Check virtual bases.
1381  for (const auto &I : BaseClassDecl->vbases()) {
1382  const CXXRecordDecl *VirtualBase =
1383  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
1384  if (!HasTrivialDestructorBody(Context, VirtualBase,
1385  MostDerivedClassDecl))
1386  return false;
1387  }
1388  }
1389 
1390  return true;
1391 }
1392 
1393 static bool
1395  const FieldDecl *Field)
1396 {
1397  QualType FieldBaseElementType = Context.getBaseElementType(Field->getType());
1398 
1399  const RecordType *RT = FieldBaseElementType->getAs<RecordType>();
1400  if (!RT)
1401  return true;
1402 
1403  CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
1404 
1405  // The destructor for an implicit anonymous union member is never invoked.
1406  if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion())
1407  return false;
1408 
1409  return HasTrivialDestructorBody(Context, FieldClassDecl, FieldClassDecl);
1410 }
1411 
1412 /// CanSkipVTablePointerInitialization - Check whether we need to initialize
1413 /// any vtable pointers before calling this destructor.
1415  const CXXDestructorDecl *Dtor) {
1416  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1417  if (!ClassDecl->isDynamicClass())
1418  return true;
1419 
1420  // For a final class, the vtable pointer is known to already point to the
1421  // class's vtable.
1422  if (ClassDecl->isEffectivelyFinal())
1423  return true;
1424 
1425  if (!Dtor->hasTrivialBody())
1426  return false;
1427 
1428  // Check the fields.
1429  for (const auto *Field : ClassDecl->fields())
1430  if (!FieldHasTrivialDestructorBody(CGF.getContext(), Field))
1431  return false;
1432 
1433  return true;
1434 }
1435 
1436 /// EmitDestructorBody - Emits the body of the current destructor.
1438  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CurGD.getDecl());
1439  CXXDtorType DtorType = CurGD.getDtorType();
1440 
1441  // For an abstract class, non-base destructors are never used (and can't
1442  // be emitted in general, because vbase dtors may not have been validated
1443  // by Sema), but the Itanium ABI doesn't make them optional and Clang may
1444  // in fact emit references to them from other compilations, so emit them
1445  // as functions containing a trap instruction.
1446  if (DtorType != Dtor_Base && Dtor->getParent()->isAbstract()) {
1447  llvm::CallInst *TrapCall = EmitTrapCall(llvm::Intrinsic::trap);
1448  TrapCall->setDoesNotReturn();
1449  TrapCall->setDoesNotThrow();
1450  Builder.CreateUnreachable();
1451  Builder.ClearInsertionPoint();
1452  return;
1453  }
1454 
1455  Stmt *Body = Dtor->getBody();
1456  if (Body)
1458 
1459  // The call to operator delete in a deleting destructor happens
1460  // outside of the function-try-block, which means it's always
1461  // possible to delegate the destructor body to the complete
1462  // destructor. Do so.
1463  if (DtorType == Dtor_Deleting) {
1464  RunCleanupsScope DtorEpilogue(*this);
1466  if (HaveInsertPoint()) {
1467  QualType ThisTy = Dtor->getThisObjectType();
1468  EmitCXXDestructorCall(Dtor, Dtor_Complete, /*ForVirtualBase=*/false,
1469  /*Delegating=*/false, LoadCXXThisAddress(), ThisTy);
1470  }
1471  return;
1472  }
1473 
1474  // If the body is a function-try-block, enter the try before
1475  // anything else.
1476  bool isTryBody = (Body && isa<CXXTryStmt>(Body));
1477  if (isTryBody)
1478  EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
1480 
1481  // Enter the epilogue cleanups.
1482  RunCleanupsScope DtorEpilogue(*this);
1483 
1484  // If this is the complete variant, just invoke the base variant;
1485  // the epilogue will destruct the virtual bases. But we can't do
1486  // this optimization if the body is a function-try-block, because
1487  // we'd introduce *two* handler blocks. In the Microsoft ABI, we
1488  // always delegate because we might not have a definition in this TU.
1489  switch (DtorType) {
1490  case Dtor_Comdat: llvm_unreachable("not expecting a COMDAT");
1491  case Dtor_Deleting: llvm_unreachable("already handled deleting case");
1492 
1493  case Dtor_Complete:
1494  assert((Body || getTarget().getCXXABI().isMicrosoft()) &&
1495  "can't emit a dtor without a body for non-Microsoft ABIs");
1496 
1497  // Enter the cleanup scopes for virtual bases.
1499 
1500  if (!isTryBody) {
1501  QualType ThisTy = Dtor->getThisObjectType();
1502  EmitCXXDestructorCall(Dtor, Dtor_Base, /*ForVirtualBase=*/false,
1503  /*Delegating=*/false, LoadCXXThisAddress(), ThisTy);
1504  break;
1505  }
1506 
1507  // Fallthrough: act like we're in the base variant.
1508  LLVM_FALLTHROUGH;
1509 
1510  case Dtor_Base:
1511  assert(Body);
1512 
1513  // Enter the cleanup scopes for fields and non-virtual bases.
1515 
1516  // Initialize the vtable pointers before entering the body.
1517  if (!CanSkipVTablePointerInitialization(*this, Dtor)) {
1518  // Insert the llvm.launder.invariant.group intrinsic before initializing
1519  // the vptrs to cancel any previous assumptions we might have made.
1520  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1521  CGM.getCodeGenOpts().OptimizationLevel > 0)
1524  }
1525 
1526  if (isTryBody)
1527  EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
1528  else if (Body)
1529  EmitStmt(Body);
1530  else {
1531  assert(Dtor->isImplicit() && "bodyless dtor not implicit");
1532  // nothing to do besides what's in the epilogue
1533  }
1534  // -fapple-kext must inline any call to this dtor into
1535  // the caller's body.
1536  if (getLangOpts().AppleKext)
1537  CurFn->addFnAttr(llvm::Attribute::AlwaysInline);
1538 
1539  break;
1540  }
1541 
1542  // Jump out through the epilogue cleanups.
1543  DtorEpilogue.ForceCleanup();
1544 
1545  // Exit the try if applicable.
1546  if (isTryBody)
1547  ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
1548 }
1549 
1551  const CXXMethodDecl *AssignOp = cast<CXXMethodDecl>(CurGD.getDecl());
1552  const Stmt *RootS = AssignOp->getBody();
1553  assert(isa<CompoundStmt>(RootS) &&
1554  "Body of an implicit assignment operator should be compound stmt.");
1555  const CompoundStmt *RootCS = cast<CompoundStmt>(RootS);
1556 
1557  LexicalScope Scope(*this, RootCS->getSourceRange());
1558 
1559  incrementProfileCounter(RootCS);
1560  AssignmentMemcpyizer AM(*this, AssignOp, Args);
1561  for (auto *I : RootCS->body())
1562  AM.emitAssignment(I);
1563  AM.finish();
1564 }
1565 
1566 namespace {
1567  llvm::Value *LoadThisForDtorDelete(CodeGenFunction &CGF,
1568  const CXXDestructorDecl *DD) {
1569  if (Expr *ThisArg = DD->getOperatorDeleteThisArg())
1570  return CGF.EmitScalarExpr(ThisArg);
1571  return CGF.LoadCXXThis();
1572  }
1573 
1574  /// Call the operator delete associated with the current destructor.
1575  struct CallDtorDelete final : EHScopeStack::Cleanup {
1576  CallDtorDelete() {}
1577 
1578  void Emit(CodeGenFunction &CGF, Flags flags) override {
1579  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CGF.CurCodeDecl);
1580  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1581  CGF.EmitDeleteCall(Dtor->getOperatorDelete(),
1582  LoadThisForDtorDelete(CGF, Dtor),
1583  CGF.getContext().getTagDeclType(ClassDecl));
1584  }
1585  };
1586 
1587  void EmitConditionalDtorDeleteCall(CodeGenFunction &CGF,
1588  llvm::Value *ShouldDeleteCondition,
1589  bool ReturnAfterDelete) {
1590  llvm::BasicBlock *callDeleteBB = CGF.createBasicBlock("dtor.call_delete");
1591  llvm::BasicBlock *continueBB = CGF.createBasicBlock("dtor.continue");
1592  llvm::Value *ShouldCallDelete
1593  = CGF.Builder.CreateIsNull(ShouldDeleteCondition);
1594  CGF.Builder.CreateCondBr(ShouldCallDelete, continueBB, callDeleteBB);
1595 
1596  CGF.EmitBlock(callDeleteBB);
1597  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CGF.CurCodeDecl);
1598  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1599  CGF.EmitDeleteCall(Dtor->getOperatorDelete(),
1600  LoadThisForDtorDelete(CGF, Dtor),
1601  CGF.getContext().getTagDeclType(ClassDecl));
1602  assert(Dtor->getOperatorDelete()->isDestroyingOperatorDelete() ==
1603  ReturnAfterDelete &&
1604  "unexpected value for ReturnAfterDelete");
1605  if (ReturnAfterDelete)
1607  else
1608  CGF.Builder.CreateBr(continueBB);
1609 
1610  CGF.EmitBlock(continueBB);
1611  }
1612 
1613  struct CallDtorDeleteConditional final : EHScopeStack::Cleanup {
1614  llvm::Value *ShouldDeleteCondition;
1615 
1616  public:
1617  CallDtorDeleteConditional(llvm::Value *ShouldDeleteCondition)
1618  : ShouldDeleteCondition(ShouldDeleteCondition) {
1619  assert(ShouldDeleteCondition != nullptr);
1620  }
1621 
1622  void Emit(CodeGenFunction &CGF, Flags flags) override {
1623  EmitConditionalDtorDeleteCall(CGF, ShouldDeleteCondition,
1624  /*ReturnAfterDelete*/false);
1625  }
1626  };
1627 
1628  class DestroyField final : public EHScopeStack::Cleanup {
1629  const FieldDecl *field;
1630  CodeGenFunction::Destroyer *destroyer;
1631  bool useEHCleanupForArray;
1632 
1633  public:
1634  DestroyField(const FieldDecl *field, CodeGenFunction::Destroyer *destroyer,
1635  bool useEHCleanupForArray)
1636  : field(field), destroyer(destroyer),
1637  useEHCleanupForArray(useEHCleanupForArray) {}
1638 
1639  void Emit(CodeGenFunction &CGF, Flags flags) override {
1640  // Find the address of the field.
1641  Address thisValue = CGF.LoadCXXThisAddress();
1642  QualType RecordTy = CGF.getContext().getTagDeclType(field->getParent());
1643  LValue ThisLV = CGF.MakeAddrLValue(thisValue, RecordTy);
1644  LValue LV = CGF.EmitLValueForField(ThisLV, field);
1645  assert(LV.isSimple());
1646 
1647  CGF.emitDestroy(LV.getAddress(CGF), field->getType(), destroyer,
1648  flags.isForNormalCleanup() && useEHCleanupForArray);
1649  }
1650  };
1651 
1652  static void EmitSanitizerDtorCallback(CodeGenFunction &CGF, llvm::Value *Ptr,
1653  CharUnits::QuantityType PoisonSize) {
1654  CodeGenFunction::SanitizerScope SanScope(&CGF);
1655  // Pass in void pointer and size of region as arguments to runtime
1656  // function
1657  llvm::Value *Args[] = {CGF.Builder.CreateBitCast(Ptr, CGF.VoidPtrTy),
1658  llvm::ConstantInt::get(CGF.SizeTy, PoisonSize)};
1659 
1660  llvm::Type *ArgTypes[] = {CGF.VoidPtrTy, CGF.SizeTy};
1661 
1662  llvm::FunctionType *FnType =
1663  llvm::FunctionType::get(CGF.VoidTy, ArgTypes, false);
1664  llvm::FunctionCallee Fn =
1665  CGF.CGM.CreateRuntimeFunction(FnType, "__sanitizer_dtor_callback");
1666  CGF.EmitNounwindRuntimeCall(Fn, Args);
1667  }
1668 
1669  /// Poison base class with a trivial destructor.
1670  struct SanitizeDtorTrivialBase final : EHScopeStack::Cleanup {
1671  const CXXRecordDecl *BaseClass;
1672  bool BaseIsVirtual;
1673  SanitizeDtorTrivialBase(const CXXRecordDecl *Base, bool BaseIsVirtual)
1674  : BaseClass(Base), BaseIsVirtual(BaseIsVirtual) {}
1675 
1676  void Emit(CodeGenFunction &CGF, Flags flags) override {
1677  const CXXRecordDecl *DerivedClass =
1678  cast<CXXMethodDecl>(CGF.CurCodeDecl)->getParent();
1679 
1681  CGF.LoadCXXThisAddress(), DerivedClass, BaseClass, BaseIsVirtual);
1682 
1683  const ASTRecordLayout &BaseLayout =
1684  CGF.getContext().getASTRecordLayout(BaseClass);
1685  CharUnits BaseSize = BaseLayout.getSize();
1686 
1687  if (!BaseSize.isPositive())
1688  return;
1689 
1690  EmitSanitizerDtorCallback(CGF, Addr.getPointer(), BaseSize.getQuantity());
1691 
1692  // Prevent the current stack frame from disappearing from the stack trace.
1693  CGF.CurFn->addFnAttr("disable-tail-calls", "true");
1694  }
1695  };
1696 
1697  class SanitizeDtorFieldRange final : public EHScopeStack::Cleanup {
1698  const CXXDestructorDecl *Dtor;
1699  unsigned StartIndex;
1700  unsigned EndIndex;
1701 
1702  public:
1703  SanitizeDtorFieldRange(const CXXDestructorDecl *Dtor, unsigned StartIndex,
1704  unsigned EndIndex)
1705  : Dtor(Dtor), StartIndex(StartIndex), EndIndex(EndIndex) {}
1706 
1707  // Generate function call for handling object poisoning.
1708  // Disables tail call elimination, to prevent the current stack frame
1709  // from disappearing from the stack trace.
1710  void Emit(CodeGenFunction &CGF, Flags flags) override {
1711  const ASTContext &Context = CGF.getContext();
1712  const ASTRecordLayout &Layout =
1713  Context.getASTRecordLayout(Dtor->getParent());
1714 
1715  // It's a first trivial field so it should be at the begining of a char,
1716  // still round up start offset just in case.
1717  CharUnits PoisonStart = Context.toCharUnitsFromBits(
1718  Layout.getFieldOffset(StartIndex) + Context.getCharWidth() - 1);
1719  llvm::ConstantInt *OffsetSizePtr =
1720  llvm::ConstantInt::get(CGF.SizeTy, PoisonStart.getQuantity());
1721 
1722  llvm::Value *OffsetPtr = CGF.Builder.CreateGEP(
1723  CGF.Int8Ty,
1724  CGF.Builder.CreateBitCast(CGF.LoadCXXThis(), CGF.Int8PtrTy),
1725  OffsetSizePtr);
1726 
1727  CharUnits PoisonEnd;
1728  if (EndIndex >= Layout.getFieldCount()) {
1729  PoisonEnd = Layout.getNonVirtualSize();
1730  } else {
1731  PoisonEnd =
1732  Context.toCharUnitsFromBits(Layout.getFieldOffset(EndIndex));
1733  }
1734  CharUnits PoisonSize = PoisonEnd - PoisonStart;
1735  if (!PoisonSize.isPositive())
1736  return;
1737 
1738  EmitSanitizerDtorCallback(CGF, OffsetPtr, PoisonSize.getQuantity());
1739 
1740  // Prevent the current stack frame from disappearing from the stack trace.
1741  CGF.CurFn->addFnAttr("disable-tail-calls", "true");
1742  }
1743  };
1744 
1745  class SanitizeDtorVTable final : public EHScopeStack::Cleanup {
1746  const CXXDestructorDecl *Dtor;
1747 
1748  public:
1749  SanitizeDtorVTable(const CXXDestructorDecl *Dtor) : Dtor(Dtor) {}
1750 
1751  // Generate function call for handling vtable pointer poisoning.
1752  void Emit(CodeGenFunction &CGF, Flags flags) override {
1753  assert(Dtor->getParent()->isDynamicClass());
1754  (void)Dtor;
1755  ASTContext &Context = CGF.getContext();
1756  // Poison vtable and vtable ptr if they exist for this class.
1757  llvm::Value *VTablePtr = CGF.LoadCXXThis();
1758 
1759  CharUnits::QuantityType PoisonSize =
1761  // Pass in void pointer and size of region as arguments to runtime
1762  // function
1763  EmitSanitizerDtorCallback(CGF, VTablePtr, PoisonSize);
1764  }
1765  };
1766 
1767  class SanitizeDtorCleanupBuilder {
1768  ASTContext &Context;
1769  EHScopeStack &EHStack;
1770  const CXXDestructorDecl *DD;
1771  llvm::Optional<unsigned> StartIndex;
1772 
1773  public:
1774  SanitizeDtorCleanupBuilder(ASTContext &Context, EHScopeStack &EHStack,
1775  const CXXDestructorDecl *DD)
1776  : Context(Context), EHStack(EHStack), DD(DD), StartIndex(llvm::None) {}
1777  void PushCleanupForField(const FieldDecl *Field) {
1778  if (Field->isZeroSize(Context))
1779  return;
1780  unsigned FieldIndex = Field->getFieldIndex();
1781  if (FieldHasTrivialDestructorBody(Context, Field)) {
1782  if (!StartIndex)
1783  StartIndex = FieldIndex;
1784  } else if (StartIndex) {
1785  EHStack.pushCleanup<SanitizeDtorFieldRange>(
1786  NormalAndEHCleanup, DD, StartIndex.getValue(), FieldIndex);
1787  StartIndex = None;
1788  }
1789  }
1790  void End() {
1791  if (StartIndex)
1792  EHStack.pushCleanup<SanitizeDtorFieldRange>(NormalAndEHCleanup, DD,
1793  StartIndex.getValue(), -1);
1794  }
1795  };
1796 } // end anonymous namespace
1797 
1798 /// Emit all code that comes at the end of class's
1799 /// destructor. This is to call destructors on members and base classes
1800 /// in reverse order of their construction.
1801 ///
1802 /// For a deleting destructor, this also handles the case where a destroying
1803 /// operator delete completely overrides the definition.
1805  CXXDtorType DtorType) {
1806  assert((!DD->isTrivial() || DD->hasAttr<DLLExportAttr>()) &&
1807  "Should not emit dtor epilogue for non-exported trivial dtor!");
1808 
1809  // The deleting-destructor phase just needs to call the appropriate
1810  // operator delete that Sema picked up.
1811  if (DtorType == Dtor_Deleting) {
1812  assert(DD->getOperatorDelete() &&
1813  "operator delete missing - EnterDtorCleanups");
1814  if (CXXStructorImplicitParamValue) {
1815  // If there is an implicit param to the deleting dtor, it's a boolean
1816  // telling whether this is a deleting destructor.
1818  EmitConditionalDtorDeleteCall(*this, CXXStructorImplicitParamValue,
1819  /*ReturnAfterDelete*/true);
1820  else
1821  EHStack.pushCleanup<CallDtorDeleteConditional>(
1822  NormalAndEHCleanup, CXXStructorImplicitParamValue);
1823  } else {
1825  const CXXRecordDecl *ClassDecl = DD->getParent();
1827  LoadThisForDtorDelete(*this, DD),
1828  getContext().getTagDeclType(ClassDecl));
1830  } else {
1831  EHStack.pushCleanup<CallDtorDelete>(NormalAndEHCleanup);
1832  }
1833  }
1834  return;
1835  }
1836 
1837  const CXXRecordDecl *ClassDecl = DD->getParent();
1838 
1839  // Unions have no bases and do not call field destructors.
1840  if (ClassDecl->isUnion())
1841  return;
1842 
1843  // The complete-destructor phase just destructs all the virtual bases.
1844  if (DtorType == Dtor_Complete) {
1845  // Poison the vtable pointer such that access after the base
1846  // and member destructors are invoked is invalid.
1847  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1848  SanOpts.has(SanitizerKind::Memory) && ClassDecl->getNumVBases() &&
1849  ClassDecl->isPolymorphic())
1850  EHStack.pushCleanup<SanitizeDtorVTable>(NormalAndEHCleanup, DD);
1851 
1852  // We push them in the forward order so that they'll be popped in
1853  // the reverse order.
1854  for (const auto &Base : ClassDecl->vbases()) {
1855  auto *BaseClassDecl =
1856  cast<CXXRecordDecl>(Base.getType()->castAs<RecordType>()->getDecl());
1857 
1858  if (BaseClassDecl->hasTrivialDestructor()) {
1859  // Under SanitizeMemoryUseAfterDtor, poison the trivial base class
1860  // memory. For non-trival base classes the same is done in the class
1861  // destructor.
1862  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1863  SanOpts.has(SanitizerKind::Memory) && !BaseClassDecl->isEmpty())
1864  EHStack.pushCleanup<SanitizeDtorTrivialBase>(NormalAndEHCleanup,
1865  BaseClassDecl,
1866  /*BaseIsVirtual*/ true);
1867  } else {
1868  EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup, BaseClassDecl,
1869  /*BaseIsVirtual*/ true);
1870  }
1871  }
1872 
1873  return;
1874  }
1875 
1876  assert(DtorType == Dtor_Base);
1877  // Poison the vtable pointer if it has no virtual bases, but inherits
1878  // virtual functions.
1879  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1880  SanOpts.has(SanitizerKind::Memory) && !ClassDecl->getNumVBases() &&
1881  ClassDecl->isPolymorphic())
1882  EHStack.pushCleanup<SanitizeDtorVTable>(NormalAndEHCleanup, DD);
1883 
1884  // Destroy non-virtual bases.
1885  for (const auto &Base : ClassDecl->bases()) {
1886  // Ignore virtual bases.
1887  if (Base.isVirtual())
1888  continue;
1889 
1890  CXXRecordDecl *BaseClassDecl = Base.getType()->getAsCXXRecordDecl();
1891 
1892  if (BaseClassDecl->hasTrivialDestructor()) {
1893  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1894  SanOpts.has(SanitizerKind::Memory) && !BaseClassDecl->isEmpty())
1895  EHStack.pushCleanup<SanitizeDtorTrivialBase>(NormalAndEHCleanup,
1896  BaseClassDecl,
1897  /*BaseIsVirtual*/ false);
1898  } else {
1899  EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup, BaseClassDecl,
1900  /*BaseIsVirtual*/ false);
1901  }
1902  }
1903 
1904  // Poison fields such that access after their destructors are
1905  // invoked, and before the base class destructor runs, is invalid.
1906  bool SanitizeFields = CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1907  SanOpts.has(SanitizerKind::Memory);
1908  SanitizeDtorCleanupBuilder SanitizeBuilder(getContext(), EHStack, DD);
1909 
1910  // Destroy direct fields.
1911  for (const auto *Field : ClassDecl->fields()) {
1912  if (SanitizeFields)
1913  SanitizeBuilder.PushCleanupForField(Field);
1914 
1915  QualType type = Field->getType();
1916  QualType::DestructionKind dtorKind = type.isDestructedType();
1917  if (!dtorKind)
1918  continue;
1919 
1920  // Anonymous union members do not have their destructors called.
1921  const RecordType *RT = type->getAsUnionType();
1922  if (RT && RT->getDecl()->isAnonymousStructOrUnion())
1923  continue;
1924 
1925  CleanupKind cleanupKind = getCleanupKind(dtorKind);
1926  EHStack.pushCleanup<DestroyField>(
1927  cleanupKind, Field, getDestroyer(dtorKind), cleanupKind & EHCleanup);
1928  }
1929 
1930  if (SanitizeFields)
1931  SanitizeBuilder.End();
1932 }
1933 
1934 /// EmitCXXAggrConstructorCall - Emit a loop to call a particular
1935 /// constructor for each of several members of an array.
1936 ///
1937 /// \param ctor the constructor to call for each element
1938 /// \param arrayType the type of the array to initialize
1939 /// \param arrayBegin an arrayType*
1940 /// \param zeroInitialize true if each element should be
1941 /// zero-initialized before it is constructed
1943  const CXXConstructorDecl *ctor, const ArrayType *arrayType,
1944  Address arrayBegin, const CXXConstructExpr *E, bool NewPointerIsChecked,
1945  bool zeroInitialize) {
1946  QualType elementType;
1947  llvm::Value *numElements =
1948  emitArrayLength(arrayType, elementType, arrayBegin);
1949 
1950  EmitCXXAggrConstructorCall(ctor, numElements, arrayBegin, E,
1951  NewPointerIsChecked, zeroInitialize);
1952 }
1953 
1954 /// EmitCXXAggrConstructorCall - Emit a loop to call a particular
1955 /// constructor for each of several members of an array.
1956 ///
1957 /// \param ctor the constructor to call for each element
1958 /// \param numElements the number of elements in the array;
1959 /// may be zero
1960 /// \param arrayBase a T*, where T is the type constructed by ctor
1961 /// \param zeroInitialize true if each element should be
1962 /// zero-initialized before it is constructed
1964  llvm::Value *numElements,
1965  Address arrayBase,
1966  const CXXConstructExpr *E,
1967  bool NewPointerIsChecked,
1968  bool zeroInitialize) {
1969  // It's legal for numElements to be zero. This can happen both
1970  // dynamically, because x can be zero in 'new A[x]', and statically,
1971  // because of GCC extensions that permit zero-length arrays. There
1972  // are probably legitimate places where we could assume that this
1973  // doesn't happen, but it's not clear that it's worth it.
1974  llvm::BranchInst *zeroCheckBranch = nullptr;
1975 
1976  // Optimize for a constant count.
1977  llvm::ConstantInt *constantCount
1978  = dyn_cast<llvm::ConstantInt>(numElements);
1979  if (constantCount) {
1980  // Just skip out if the constant count is zero.
1981  if (constantCount->isZero()) return;
1982 
1983  // Otherwise, emit the check.
1984  } else {
1985  llvm::BasicBlock *loopBB = createBasicBlock("new.ctorloop");
1986  llvm::Value *iszero = Builder.CreateIsNull(numElements, "isempty");
1987  zeroCheckBranch = Builder.CreateCondBr(iszero, loopBB, loopBB);
1988  EmitBlock(loopBB);
1989  }
1990 
1991  // Find the end of the array.
1992  llvm::Type *elementType = arrayBase.getElementType();
1993  llvm::Value *arrayBegin = arrayBase.getPointer();
1994  llvm::Value *arrayEnd = Builder.CreateInBoundsGEP(
1995  elementType, arrayBegin, numElements, "arrayctor.end");
1996 
1997  // Enter the loop, setting up a phi for the current location to initialize.
1998  llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
1999  llvm::BasicBlock *loopBB = createBasicBlock("arrayctor.loop");
2000  EmitBlock(loopBB);
2001  llvm::PHINode *cur = Builder.CreatePHI(arrayBegin->getType(), 2,
2002  "arrayctor.cur");
2003  cur->addIncoming(arrayBegin, entryBB);
2004 
2005  // Inside the loop body, emit the constructor call on the array element.
2006 
2007  // The alignment of the base, adjusted by the size of a single element,
2008  // provides a conservative estimate of the alignment of every element.
2009  // (This assumes we never start tracking offsetted alignments.)
2010  //
2011  // Note that these are complete objects and so we don't need to
2012  // use the non-virtual size or alignment.
2014  CharUnits eltAlignment =
2015  arrayBase.getAlignment()
2016  .alignmentOfArrayElement(getContext().getTypeSizeInChars(type));
2017  Address curAddr = Address(cur, elementType, eltAlignment);
2018 
2019  // Zero initialize the storage, if requested.
2020  if (zeroInitialize)
2021  EmitNullInitialization(curAddr, type);
2022 
2023  // C++ [class.temporary]p4:
2024  // There are two contexts in which temporaries are destroyed at a different
2025  // point than the end of the full-expression. The first context is when a
2026  // default constructor is called to initialize an element of an array.
2027  // If the constructor has one or more default arguments, the destruction of
2028  // every temporary created in a default argument expression is sequenced
2029  // before the construction of the next array element, if any.
2030 
2031  {
2032  RunCleanupsScope Scope(*this);
2033 
2034  // Evaluate the constructor and its arguments in a regular
2035  // partial-destroy cleanup.
2036  if (getLangOpts().Exceptions &&
2037  !ctor->getParent()->hasTrivialDestructor()) {
2038  Destroyer *destroyer = destroyCXXObject;
2039  pushRegularPartialArrayCleanup(arrayBegin, cur, type, eltAlignment,
2040  *destroyer);
2041  }
2042  auto currAVS = AggValueSlot::forAddr(
2043  curAddr, type.getQualifiers(), AggValueSlot::IsDestructed,
2046  NewPointerIsChecked ? AggValueSlot::IsSanitizerChecked
2048  EmitCXXConstructorCall(ctor, Ctor_Complete, /*ForVirtualBase=*/false,
2049  /*Delegating=*/false, currAVS, E);
2050  }
2051 
2052  // Go to the next element.
2053  llvm::Value *next = Builder.CreateInBoundsGEP(
2054  elementType, cur, llvm::ConstantInt::get(SizeTy, 1), "arrayctor.next");
2055  cur->addIncoming(next, Builder.GetInsertBlock());
2056 
2057  // Check whether that's the end of the loop.
2058  llvm::Value *done = Builder.CreateICmpEQ(next, arrayEnd, "arrayctor.done");
2059  llvm::BasicBlock *contBB = createBasicBlock("arrayctor.cont");
2060  Builder.CreateCondBr(done, contBB, loopBB);
2061 
2062  // Patch the earlier check to skip over the loop.
2063  if (zeroCheckBranch) zeroCheckBranch->setSuccessor(0, contBB);
2064 
2065  EmitBlock(contBB);
2066 }
2067 
2069  Address addr,
2070  QualType type) {
2071  const RecordType *rtype = type->castAs<RecordType>();
2072  const CXXRecordDecl *record = cast<CXXRecordDecl>(rtype->getDecl());
2073  const CXXDestructorDecl *dtor = record->getDestructor();
2074  assert(!dtor->isTrivial());
2075  CGF.EmitCXXDestructorCall(dtor, Dtor_Complete, /*for vbase*/ false,
2076  /*Delegating=*/false, addr, type);
2077 }
2078 
2080  CXXCtorType Type,
2081  bool ForVirtualBase,
2082  bool Delegating,
2083  AggValueSlot ThisAVS,
2084  const CXXConstructExpr *E) {
2085  CallArgList Args;
2086  Address This = ThisAVS.getAddress();
2087  LangAS SlotAS = ThisAVS.getQualifiers().getAddressSpace();
2088  QualType ThisType = D->getThisType();
2089  LangAS ThisAS = ThisType.getTypePtr()->getPointeeType().getAddressSpace();
2090  llvm::Value *ThisPtr = This.getPointer();
2091 
2092  if (SlotAS != ThisAS) {
2093  unsigned TargetThisAS = getContext().getTargetAddressSpace(ThisAS);
2094  llvm::Type *NewType = llvm::PointerType::getWithSamePointeeType(
2095  This.getType(), TargetThisAS);
2096  ThisPtr = getTargetHooks().performAddrSpaceCast(*this, This.getPointer(),
2097  ThisAS, SlotAS, NewType);
2098  }
2099 
2100  // Push the this ptr.
2101  Args.add(RValue::get(ThisPtr), D->getThisType());
2102 
2103  // If this is a trivial constructor, emit a memcpy now before we lose
2104  // the alignment information on the argument.
2105  // FIXME: It would be better to preserve alignment information into CallArg.
2107  assert(E->getNumArgs() == 1 && "unexpected argcount for trivial ctor");
2108 
2109  const Expr *Arg = E->getArg(0);
2110  LValue Src = EmitLValue(Arg);
2111  QualType DestTy = getContext().getTypeDeclType(D->getParent());
2112  LValue Dest = MakeAddrLValue(This, DestTy);
2113  EmitAggregateCopyCtor(Dest, Src, ThisAVS.mayOverlap());
2114  return;
2115  }
2116 
2117  // Add the rest of the user-supplied arguments.
2118  const FunctionProtoType *FPT = D->getType()->castAs<FunctionProtoType>();
2122  EmitCallArgs(Args, FPT, E->arguments(), E->getConstructor(),
2123  /*ParamsToSkip*/ 0, Order);
2124 
2125  EmitCXXConstructorCall(D, Type, ForVirtualBase, Delegating, This, Args,
2126  ThisAVS.mayOverlap(), E->getExprLoc(),
2127  ThisAVS.isSanitizerChecked());
2128 }
2129 
2131  const CXXConstructorDecl *Ctor,
2132  CXXCtorType Type, CallArgList &Args) {
2133  // We can't forward a variadic call.
2134  if (Ctor->isVariadic())
2135  return false;
2136 
2138  // If the parameters are callee-cleanup, it's not safe to forward.
2139  for (auto *P : Ctor->parameters())
2140  if (P->needsDestruction(CGF.getContext()))
2141  return false;
2142 
2143  // Likewise if they're inalloca.
2144  const CGFunctionInfo &Info =
2145  CGF.CGM.getTypes().arrangeCXXConstructorCall(Args, Ctor, Type, 0, 0);
2146  if (Info.usesInAlloca())
2147  return false;
2148  }
2149 
2150  // Anything else should be OK.
2151  return true;
2152 }
2153 
2155  CXXCtorType Type,
2156  bool ForVirtualBase,
2157  bool Delegating,
2158  Address This,
2159  CallArgList &Args,
2160  AggValueSlot::Overlap_t Overlap,
2161  SourceLocation Loc,
2162  bool NewPointerIsChecked) {
2163  const CXXRecordDecl *ClassDecl = D->getParent();
2164 
2165  if (!NewPointerIsChecked)
2167  getContext().getRecordType(ClassDecl), CharUnits::Zero());
2168 
2169  if (D->isTrivial() && D->isDefaultConstructor()) {
2170  assert(Args.size() == 1 && "trivial default ctor with args");
2171  return;
2172  }
2173 
2174  // If this is a trivial constructor, just emit what's needed. If this is a
2175  // union copy constructor, we must emit a memcpy, because the AST does not
2176  // model that copy.
2178  assert(Args.size() == 2 && "unexpected argcount for trivial ctor");
2179 
2180  QualType SrcTy = D->getParamDecl(0)->getType().getNonReferenceType();
2181  Address Src = Address(Args[1].getRValue(*this).getScalarVal(), ConvertTypeForMem(SrcTy),
2182  CGM.getNaturalTypeAlignment(SrcTy));
2183  LValue SrcLVal = MakeAddrLValue(Src, SrcTy);
2184  QualType DestTy = getContext().getTypeDeclType(ClassDecl);
2185  LValue DestLVal = MakeAddrLValue(This, DestTy);
2186  EmitAggregateCopyCtor(DestLVal, SrcLVal, Overlap);
2187  return;
2188  }
2189 
2190  bool PassPrototypeArgs = true;
2191  // Check whether we can actually emit the constructor before trying to do so.
2192  if (auto Inherited = D->getInheritedConstructor()) {
2193  PassPrototypeArgs = getTypes().inheritingCtorHasParams(Inherited, Type);
2194  if (PassPrototypeArgs && !canEmitDelegateCallArgs(*this, D, Type, Args)) {
2195  EmitInlinedInheritingCXXConstructorCall(D, Type, ForVirtualBase,
2196  Delegating, Args);
2197  return;
2198  }
2199  }
2200 
2201  // Insert any ABI-specific implicit constructor arguments.
2203  CGM.getCXXABI().addImplicitConstructorArgs(*this, D, Type, ForVirtualBase,
2204  Delegating, Args);
2205 
2206  // Emit the call.
2207  llvm::Constant *CalleePtr = CGM.getAddrOfCXXStructor(GlobalDecl(D, Type));
2209  Args, D, Type, ExtraArgs.Prefix, ExtraArgs.Suffix, PassPrototypeArgs);
2210  CGCallee Callee = CGCallee::forDirect(CalleePtr, GlobalDecl(D, Type));
2211  EmitCall(Info, Callee, ReturnValueSlot(), Args, nullptr, false, Loc);
2212 
2213  // Generate vtable assumptions if we're constructing a complete object
2214  // with a vtable. We don't do this for base subobjects for two reasons:
2215  // first, it's incorrect for classes with virtual bases, and second, we're
2216  // about to overwrite the vptrs anyway.
2217  // We also have to make sure if we can refer to vtable:
2218  // - Otherwise we can refer to vtable if it's safe to speculatively emit.
2219  // FIXME: If vtable is used by ctor/dtor, or if vtable is external and we are
2220  // sure that definition of vtable is not hidden,
2221  // then we are always safe to refer to it.
2222  // FIXME: It looks like InstCombine is very inefficient on dealing with
2223  // assumes. Make assumption loads require -fstrict-vtable-pointers temporarily.
2224  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2225  ClassDecl->isDynamicClass() && Type != Ctor_Base &&
2226  CGM.getCXXABI().canSpeculativelyEmitVTable(ClassDecl) &&
2227  CGM.getCodeGenOpts().StrictVTablePointers)
2228  EmitVTableAssumptionLoads(ClassDecl, This);
2229 }
2230 
2232  const CXXConstructorDecl *D, bool ForVirtualBase, Address This,
2233  bool InheritedFromVBase, const CXXInheritedCtorInitExpr *E) {
2234  CallArgList Args;
2235  CallArg ThisArg(RValue::get(This.getPointer()), D->getThisType());
2236 
2237  // Forward the parameters.
2238  if (InheritedFromVBase &&
2240  // Nothing to do; this construction is not responsible for constructing
2241  // the base class containing the inherited constructor.
2242  // FIXME: Can we just pass undef's for the remaining arguments if we don't
2243  // have constructor variants?
2244  Args.push_back(ThisArg);
2245  } else if (!CXXInheritedCtorInitExprArgs.empty()) {
2246  // The inheriting constructor was inlined; just inject its arguments.
2247  assert(CXXInheritedCtorInitExprArgs.size() >= D->getNumParams() &&
2248  "wrong number of parameters for inherited constructor call");
2249  Args = CXXInheritedCtorInitExprArgs;
2250  Args[0] = ThisArg;
2251  } else {
2252  // The inheriting constructor was not inlined. Emit delegating arguments.
2253  Args.push_back(ThisArg);
2254  const auto *OuterCtor = cast<CXXConstructorDecl>(CurCodeDecl);
2255  assert(OuterCtor->getNumParams() == D->getNumParams());
2256  assert(!OuterCtor->isVariadic() && "should have been inlined");
2257 
2258  for (const auto *Param : OuterCtor->parameters()) {
2259  assert(getContext().hasSameUnqualifiedType(
2260  OuterCtor->getParamDecl(Param->getFunctionScopeIndex())->getType(),
2261  Param->getType()));
2262  EmitDelegateCallArg(Args, Param, E->getLocation());
2263 
2264  // Forward __attribute__(pass_object_size).
2265  if (Param->hasAttr<PassObjectSizeAttr>()) {
2266  auto *POSParam = SizeArguments[Param];
2267  assert(POSParam && "missing pass_object_size value for forwarding");
2268  EmitDelegateCallArg(Args, POSParam, E->getLocation());
2269  }
2270  }
2271  }
2272 
2273  EmitCXXConstructorCall(D, Ctor_Base, ForVirtualBase, /*Delegating*/false,
2275  E->getLocation(), /*NewPointerIsChecked*/true);
2276 }
2277 
2279  const CXXConstructorDecl *Ctor, CXXCtorType CtorType, bool ForVirtualBase,
2280  bool Delegating, CallArgList &Args) {
2281  GlobalDecl GD(Ctor, CtorType);
2283  ApplyInlineDebugLocation DebugScope(*this, GD);
2284  RunCleanupsScope RunCleanups(*this);
2285 
2286  // Save the arguments to be passed to the inherited constructor.
2287  CXXInheritedCtorInitExprArgs = Args;
2288 
2289  FunctionArgList Params;
2290  QualType RetType = BuildFunctionArgList(CurGD, Params);
2291  FnRetTy = RetType;
2292 
2293  // Insert any ABI-specific implicit constructor arguments.
2294  CGM.getCXXABI().addImplicitConstructorArgs(*this, Ctor, CtorType,
2295  ForVirtualBase, Delegating, Args);
2296 
2297  // Emit a simplified prolog. We only need to emit the implicit params.
2298  assert(Args.size() >= Params.size() && "too few arguments for call");
2299  for (unsigned I = 0, N = Args.size(); I != N; ++I) {
2300  if (I < Params.size() && isa<ImplicitParamDecl>(Params[I])) {
2301  const RValue &RV = Args[I].getRValue(*this);
2302  assert(!RV.isComplex() && "complex indirect params not supported");
2303  ParamValue Val = RV.isScalar()
2306  EmitParmDecl(*Params[I], Val, I + 1);
2307  }
2308  }
2309 
2310  // Create a return value slot if the ABI implementation wants one.
2311  // FIXME: This is dumb, we should ask the ABI not to try to set the return
2312  // value instead.
2313  if (!RetType->isVoidType())
2314  ReturnValue = CreateIRTemp(RetType, "retval.inhctor");
2315 
2317  CXXThisValue = CXXABIThisValue;
2318 
2319  // Directly emit the constructor initializers.
2320  EmitCtorPrologue(Ctor, CtorType, Params);
2321 }
2322 
2324  llvm::Value *VTableGlobal =
2326  if (!VTableGlobal)
2327  return;
2328 
2329  // We can just use the base offset in the complete class.
2330  CharUnits NonVirtualOffset = Vptr.Base.getBaseOffset();
2331 
2332  if (!NonVirtualOffset.isZero())
2333  This =
2334  ApplyNonVirtualAndVirtualOffset(*this, This, NonVirtualOffset, nullptr,
2335  Vptr.VTableClass, Vptr.NearestVBase);
2336 
2337  llvm::Value *VPtrValue =
2338  GetVTablePtr(This, VTableGlobal->getType(), Vptr.VTableClass);
2339  llvm::Value *Cmp =
2340  Builder.CreateICmpEQ(VPtrValue, VTableGlobal, "cmp.vtables");
2341  Builder.CreateAssumption(Cmp);
2342 }
2343 
2345  Address This) {
2346  if (CGM.getCXXABI().doStructorsInitializeVPtrs(ClassDecl))
2347  for (const VPtr &Vptr : getVTablePointers(ClassDecl))
2349 }
2350 
2351 void
2353  Address This, Address Src,
2354  const CXXConstructExpr *E) {
2355  const FunctionProtoType *FPT = D->getType()->castAs<FunctionProtoType>();
2356 
2357  CallArgList Args;
2358 
2359  // Push the this ptr.
2360  Args.add(RValue::get(This.getPointer()), D->getThisType());
2361 
2362  // Push the src ptr.
2363  QualType QT = *(FPT->param_type_begin());
2364  llvm::Type *t = CGM.getTypes().ConvertType(QT);
2365  llvm::Value *SrcVal = Builder.CreateBitCast(Src.getPointer(), t);
2366  Args.add(RValue::get(SrcVal), QT);
2367 
2368  // Skip over first argument (Src).
2369  EmitCallArgs(Args, FPT, drop_begin(E->arguments(), 1), E->getConstructor(),
2370  /*ParamsToSkip*/ 1);
2371 
2372  EmitCXXConstructorCall(D, Ctor_Complete, /*ForVirtualBase*/false,
2373  /*Delegating*/false, This, Args,
2375  /*NewPointerIsChecked*/false);
2376 }
2377 
2378 void
2380  CXXCtorType CtorType,
2381  const FunctionArgList &Args,
2382  SourceLocation Loc) {
2383  CallArgList DelegateArgs;
2384 
2385  FunctionArgList::const_iterator I = Args.begin(), E = Args.end();
2386  assert(I != E && "no parameters to constructor");
2387 
2388  // this
2390  DelegateArgs.add(RValue::get(This.getPointer()), (*I)->getType());
2391  ++I;
2392 
2393  // FIXME: The location of the VTT parameter in the parameter list is
2394  // specific to the Itanium ABI and shouldn't be hardcoded here.
2396  assert(I != E && "cannot skip vtt parameter, already done with args");
2397  assert((*I)->getType()->isPointerType() &&
2398  "skipping parameter not of vtt type");
2399  ++I;
2400  }
2401 
2402  // Explicit arguments.
2403  for (; I != E; ++I) {
2404  const VarDecl *param = *I;
2405  // FIXME: per-argument source location
2406  EmitDelegateCallArg(DelegateArgs, param, Loc);
2407  }
2408 
2409  EmitCXXConstructorCall(Ctor, CtorType, /*ForVirtualBase=*/false,
2410  /*Delegating=*/true, This, DelegateArgs,
2412  /*NewPointerIsChecked=*/true);
2413 }
2414 
2415 namespace {
2416  struct CallDelegatingCtorDtor final : EHScopeStack::Cleanup {
2417  const CXXDestructorDecl *Dtor;
2418  Address Addr;
2419  CXXDtorType Type;
2420 
2421  CallDelegatingCtorDtor(const CXXDestructorDecl *D, Address Addr,
2422  CXXDtorType Type)
2423  : Dtor(D), Addr(Addr), Type(Type) {}
2424 
2425  void Emit(CodeGenFunction &CGF, Flags flags) override {
2426  // We are calling the destructor from within the constructor.
2427  // Therefore, "this" should have the expected type.
2428  QualType ThisTy = Dtor->getThisObjectType();
2429  CGF.EmitCXXDestructorCall(Dtor, Type, /*ForVirtualBase=*/false,
2430  /*Delegating=*/true, Addr, ThisTy);
2431  }
2432  };
2433 } // end anonymous namespace
2434 
2435 void
2437  const FunctionArgList &Args) {
2438  assert(Ctor->isDelegatingConstructor());
2439 
2440  Address ThisPtr = LoadCXXThisAddress();
2441 
2442  AggValueSlot AggSlot =
2443  AggValueSlot::forAddr(ThisPtr, Qualifiers(),
2449  // Checks are made by the code that calls constructor.
2451 
2452  EmitAggExpr(Ctor->init_begin()[0]->getInit(), AggSlot);
2453 
2454  const CXXRecordDecl *ClassDecl = Ctor->getParent();
2455  if (CGM.getLangOpts().Exceptions && !ClassDecl->hasTrivialDestructor()) {
2456  CXXDtorType Type =
2458 
2459  EHStack.pushCleanup<CallDelegatingCtorDtor>(EHCleanup,
2460  ClassDecl->getDestructor(),
2461  ThisPtr, Type);
2462  }
2463 }
2464 
2466  CXXDtorType Type,
2467  bool ForVirtualBase,
2468  bool Delegating, Address This,
2469  QualType ThisTy) {
2470  CGM.getCXXABI().EmitDestructorCall(*this, DD, Type, ForVirtualBase,
2471  Delegating, This, ThisTy);
2472 }
2473 
2474 namespace {
2475  struct CallLocalDtor final : EHScopeStack::Cleanup {
2476  const CXXDestructorDecl *Dtor;
2477  Address Addr;
2478  QualType Ty;
2479 
2480  CallLocalDtor(const CXXDestructorDecl *D, Address Addr, QualType Ty)
2481  : Dtor(D), Addr(Addr), Ty(Ty) {}
2482 
2483  void Emit(CodeGenFunction &CGF, Flags flags) override {
2485  /*ForVirtualBase=*/false,
2486  /*Delegating=*/false, Addr, Ty);
2487  }
2488  };
2489 } // end anonymous namespace
2490 
2492  QualType T, Address Addr) {
2493  EHStack.pushCleanup<CallLocalDtor>(NormalAndEHCleanup, D, Addr, T);
2494 }
2495 
2497  CXXRecordDecl *ClassDecl = T->getAsCXXRecordDecl();
2498  if (!ClassDecl) return;
2499  if (ClassDecl->hasTrivialDestructor()) return;
2500 
2501  const CXXDestructorDecl *D = ClassDecl->getDestructor();
2502  assert(D && D->isUsed() && "destructor not marked as used!");
2503  PushDestructorCleanup(D, T, Addr);
2504 }
2505 
2507  // Compute the address point.
2508  llvm::Value *VTableAddressPoint =
2510  *this, Vptr.VTableClass, Vptr.Base, Vptr.NearestVBase);
2511 
2512  if (!VTableAddressPoint)
2513  return;
2514 
2515  // Compute where to store the address point.
2516  llvm::Value *VirtualOffset = nullptr;
2517  CharUnits NonVirtualOffset = CharUnits::Zero();
2518 
2519  if (CGM.getCXXABI().isVirtualOffsetNeededForVTableField(*this, Vptr)) {
2520  // We need to use the virtual base offset offset because the virtual base
2521  // might have a different offset in the most derived class.
2522 
2523  VirtualOffset = CGM.getCXXABI().GetVirtualBaseClassOffset(
2524  *this, LoadCXXThisAddress(), Vptr.VTableClass, Vptr.NearestVBase);
2525  NonVirtualOffset = Vptr.OffsetFromNearestVBase;
2526  } else {
2527  // We can just use the base offset in the complete class.
2528  NonVirtualOffset = Vptr.Base.getBaseOffset();
2529  }
2530 
2531  // Apply the offsets.
2532  Address VTableField = LoadCXXThisAddress();
2533  if (!NonVirtualOffset.isZero() || VirtualOffset)
2534  VTableField = ApplyNonVirtualAndVirtualOffset(
2535  *this, VTableField, NonVirtualOffset, VirtualOffset, Vptr.VTableClass,
2536  Vptr.NearestVBase);
2537 
2538  // Finally, store the address point. Use the same LLVM types as the field to
2539  // support optimization.
2540  unsigned GlobalsAS = CGM.getDataLayout().getDefaultGlobalsAddressSpace();
2541  unsigned ProgAS = CGM.getDataLayout().getProgramAddressSpace();
2542  llvm::Type *VTablePtrTy =
2543  llvm::FunctionType::get(CGM.Int32Ty, /*isVarArg=*/true)
2544  ->getPointerTo(ProgAS)
2545  ->getPointerTo(GlobalsAS);
2546  // vtable field is is derived from `this` pointer, therefore they should be in
2547  // the same addr space. Note that this might not be LLVM address space 0.
2548  VTableField = Builder.CreateElementBitCast(VTableField, VTablePtrTy);
2549  VTableAddressPoint = Builder.CreateBitCast(VTableAddressPoint, VTablePtrTy);
2550 
2551  llvm::StoreInst *Store = Builder.CreateStore(VTableAddressPoint, VTableField);
2552  TBAAAccessInfo TBAAInfo = CGM.getTBAAVTablePtrAccessInfo(VTablePtrTy);
2554  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2555  CGM.getCodeGenOpts().StrictVTablePointers)
2557 }
2558 
2561  CodeGenFunction::VPtrsVector VPtrsResult;
2562  VisitedVirtualBasesSetTy VBases;
2564  /*NearestVBase=*/nullptr,
2565  /*OffsetFromNearestVBase=*/CharUnits::Zero(),
2566  /*BaseIsNonVirtualPrimaryBase=*/false, VTableClass, VBases,
2567  VPtrsResult);
2568  return VPtrsResult;
2569 }
2570 
2572  const CXXRecordDecl *NearestVBase,
2573  CharUnits OffsetFromNearestVBase,
2574  bool BaseIsNonVirtualPrimaryBase,
2575  const CXXRecordDecl *VTableClass,
2576  VisitedVirtualBasesSetTy &VBases,
2577  VPtrsVector &Vptrs) {
2578  // If this base is a non-virtual primary base the address point has already
2579  // been set.
2580  if (!BaseIsNonVirtualPrimaryBase) {
2581  // Initialize the vtable pointer for this base.
2582  VPtr Vptr = {Base, NearestVBase, OffsetFromNearestVBase, VTableClass};
2583  Vptrs.push_back(Vptr);
2584  }
2585 
2586  const CXXRecordDecl *RD = Base.getBase();
2587 
2588  // Traverse bases.
2589  for (const auto &I : RD->bases()) {
2590  auto *BaseDecl =
2591  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
2592 
2593  // Ignore classes without a vtable.
2594  if (!BaseDecl->isDynamicClass())
2595  continue;
2596 
2597  CharUnits BaseOffset;
2598  CharUnits BaseOffsetFromNearestVBase;
2599  bool BaseDeclIsNonVirtualPrimaryBase;
2600 
2601  if (I.isVirtual()) {
2602  // Check if we've visited this virtual base before.
2603  if (!VBases.insert(BaseDecl).second)
2604  continue;
2605 
2606  const ASTRecordLayout &Layout =
2607  getContext().getASTRecordLayout(VTableClass);
2608 
2609  BaseOffset = Layout.getVBaseClassOffset(BaseDecl);
2610  BaseOffsetFromNearestVBase = CharUnits::Zero();
2611  BaseDeclIsNonVirtualPrimaryBase = false;
2612  } else {
2613  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
2614 
2615  BaseOffset = Base.getBaseOffset() + Layout.getBaseClassOffset(BaseDecl);
2616  BaseOffsetFromNearestVBase =
2617  OffsetFromNearestVBase + Layout.getBaseClassOffset(BaseDecl);
2618  BaseDeclIsNonVirtualPrimaryBase = Layout.getPrimaryBase() == BaseDecl;
2619  }
2620 
2622  BaseSubobject(BaseDecl, BaseOffset),
2623  I.isVirtual() ? BaseDecl : NearestVBase, BaseOffsetFromNearestVBase,
2624  BaseDeclIsNonVirtualPrimaryBase, VTableClass, VBases, Vptrs);
2625  }
2626 }
2627 
2629  // Ignore classes without a vtable.
2630  if (!RD->isDynamicClass())
2631  return;
2632 
2633  // Initialize the vtable pointers for this class and all of its bases.
2635  for (const VPtr &Vptr : getVTablePointers(RD))
2637 
2638  if (RD->getNumVBases())
2640 }
2641 
2643  llvm::Type *VTableTy,
2644  const CXXRecordDecl *RD) {
2645  Address VTablePtrSrc = Builder.CreateElementBitCast(This, VTableTy);
2646  llvm::Instruction *VTable = Builder.CreateLoad(VTablePtrSrc, "vtable");
2647  TBAAAccessInfo TBAAInfo = CGM.getTBAAVTablePtrAccessInfo(VTableTy);
2648  CGM.DecorateInstructionWithTBAA(VTable, TBAAInfo);
2649 
2650  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2651  CGM.getCodeGenOpts().StrictVTablePointers)
2653 
2654  return VTable;
2655 }
2656 
2657 // If a class has a single non-virtual base and does not introduce or override
2658 // virtual member functions or fields, it will have the same layout as its base.
2659 // This function returns the least derived such class.
2660 //
2661 // Casting an instance of a base class to such a derived class is technically
2662 // undefined behavior, but it is a relatively common hack for introducing member
2663 // functions on class instances with specific properties (e.g. llvm::Operator)
2664 // that works under most compilers and should not have security implications, so
2665 // we allow it by default. It can be disabled with -fsanitize=cfi-cast-strict.
2666 static const CXXRecordDecl *
2668  if (!RD->field_empty())
2669  return RD;
2670 
2671  if (RD->getNumVBases() != 0)
2672  return RD;
2673 
2674  if (RD->getNumBases() != 1)
2675  return RD;
2676 
2677  for (const CXXMethodDecl *MD : RD->methods()) {
2678  if (MD->isVirtual()) {
2679  // Virtual member functions are only ok if they are implicit destructors
2680  // because the implicit destructor will have the same semantics as the
2681  // base class's destructor if no fields are added.
2682  if (isa<CXXDestructorDecl>(MD) && MD->isImplicit())
2683  continue;
2684  return RD;
2685  }
2686  }
2687 
2689  RD->bases_begin()->getType()->getAsCXXRecordDecl());
2690 }
2691 
2693  llvm::Value *VTable,
2694  SourceLocation Loc) {
2695  if (SanOpts.has(SanitizerKind::CFIVCall))
2697  else if (CGM.getCodeGenOpts().WholeProgramVTables &&
2698  // Don't insert type test assumes if we are forcing public std
2699  // visibility.
2701  llvm::Metadata *MD =
2703  llvm::Value *TypeId =
2704  llvm::MetadataAsValue::get(CGM.getLLVMContext(), MD);
2705 
2706  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2707  llvm::Value *TypeTest =
2708  Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::type_test),
2709  {CastedVTable, TypeId});
2710  Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::assume), TypeTest);
2711  }
2712 }
2713 
2715  llvm::Value *VTable,
2716  CFITypeCheckKind TCK,
2717  SourceLocation Loc) {
2718  if (!SanOpts.has(SanitizerKind::CFICastStrict))
2720 
2721  EmitVTablePtrCheck(RD, VTable, TCK, Loc);
2722 }
2723 
2725  bool MayBeNull,
2726  CFITypeCheckKind TCK,
2727  SourceLocation Loc) {
2728  if (!getLangOpts().CPlusPlus)
2729  return;
2730 
2731  auto *ClassTy = T->getAs<RecordType>();
2732  if (!ClassTy)
2733  return;
2734 
2735  const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(ClassTy->getDecl());
2736 
2737  if (!ClassDecl->isCompleteDefinition() || !ClassDecl->isDynamicClass())
2738  return;
2739 
2740  if (!SanOpts.has(SanitizerKind::CFICastStrict))
2741  ClassDecl = LeastDerivedClassWithSameLayout(ClassDecl);
2742 
2743  llvm::BasicBlock *ContBlock = nullptr;
2744 
2745  if (MayBeNull) {
2746  llvm::Value *DerivedNotNull =
2747  Builder.CreateIsNotNull(Derived.getPointer(), "cast.nonnull");
2748 
2749  llvm::BasicBlock *CheckBlock = createBasicBlock("cast.check");
2750  ContBlock = createBasicBlock("cast.cont");
2751 
2752  Builder.CreateCondBr(DerivedNotNull, CheckBlock, ContBlock);
2753 
2754  EmitBlock(CheckBlock);
2755  }
2756 
2757  llvm::Value *VTable;
2758  std::tie(VTable, ClassDecl) =
2759  CGM.getCXXABI().LoadVTablePtr(*this, Derived, ClassDecl);
2760 
2761  EmitVTablePtrCheck(ClassDecl, VTable, TCK, Loc);
2762 
2763  if (MayBeNull) {
2764  Builder.CreateBr(ContBlock);
2765  EmitBlock(ContBlock);
2766  }
2767 }
2768 
2770  llvm::Value *VTable,
2771  CFITypeCheckKind TCK,
2772  SourceLocation Loc) {
2773  if (!CGM.getCodeGenOpts().SanitizeCfiCrossDso &&
2775  return;
2776 
2777  SanitizerMask M;
2778  llvm::SanitizerStatKind SSK;
2779  switch (TCK) {
2780  case CFITCK_VCall:
2781  M = SanitizerKind::CFIVCall;
2782  SSK = llvm::SanStat_CFI_VCall;
2783  break;
2784  case CFITCK_NVCall:
2785  M = SanitizerKind::CFINVCall;
2786  SSK = llvm::SanStat_CFI_NVCall;
2787  break;
2788  case CFITCK_DerivedCast:
2789  M = SanitizerKind::CFIDerivedCast;
2790  SSK = llvm::SanStat_CFI_DerivedCast;
2791  break;
2792  case CFITCK_UnrelatedCast:
2793  M = SanitizerKind::CFIUnrelatedCast;
2794  SSK = llvm::SanStat_CFI_UnrelatedCast;
2795  break;
2796  case CFITCK_ICall:
2797  case CFITCK_NVMFCall:
2798  case CFITCK_VMFCall:
2799  llvm_unreachable("unexpected sanitizer kind");
2800  }
2801 
2803  if (getContext().getNoSanitizeList().containsType(M, TypeName))
2804  return;
2805 
2806  SanitizerScope SanScope(this);
2808 
2809  llvm::Metadata *MD =
2811  llvm::Value *TypeId = llvm::MetadataAsValue::get(getLLVMContext(), MD);
2812 
2813  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2814  llvm::Value *TypeTest = Builder.CreateCall(
2815  CGM.getIntrinsic(llvm::Intrinsic::type_test), {CastedVTable, TypeId});
2816 
2817  llvm::Constant *StaticData[] = {
2818  llvm::ConstantInt::get(Int8Ty, TCK),
2821  };
2822 
2823  auto CrossDsoTypeId = CGM.CreateCrossDsoCfiTypeId(MD);
2824  if (CGM.getCodeGenOpts().SanitizeCfiCrossDso && CrossDsoTypeId) {
2825  EmitCfiSlowPathCheck(M, TypeTest, CrossDsoTypeId, CastedVTable, StaticData);
2826  return;
2827  }
2828 
2829  if (CGM.getCodeGenOpts().SanitizeTrap.has(M)) {
2830  EmitTrapCheck(TypeTest, SanitizerHandler::CFICheckFail);
2831  return;
2832  }
2833 
2834  llvm::Value *AllVtables = llvm::MetadataAsValue::get(
2835  CGM.getLLVMContext(),
2836  llvm::MDString::get(CGM.getLLVMContext(), "all-vtables"));
2837  llvm::Value *ValidVtable = Builder.CreateCall(
2838  CGM.getIntrinsic(llvm::Intrinsic::type_test), {CastedVTable, AllVtables});
2839  EmitCheck(std::make_pair(TypeTest, M), SanitizerHandler::CFICheckFail,
2840  StaticData, {CastedVTable, ValidVtable});
2841 }
2842 
2844  if (!CGM.getCodeGenOpts().WholeProgramVTables ||
2846  return false;
2847 
2848  if (CGM.getCodeGenOpts().VirtualFunctionElimination)
2849  return true;
2850 
2851  if (!SanOpts.has(SanitizerKind::CFIVCall) ||
2852  !CGM.getCodeGenOpts().SanitizeTrap.has(SanitizerKind::CFIVCall))
2853  return false;
2854 
2856  return !getContext().getNoSanitizeList().containsType(SanitizerKind::CFIVCall,
2857  TypeName);
2858 }
2859 
2861  const CXXRecordDecl *RD, llvm::Value *VTable, llvm::Type *VTableTy,
2862  uint64_t VTableByteOffset) {
2863  SanitizerScope SanScope(this);
2864 
2865  EmitSanitizerStatReport(llvm::SanStat_CFI_VCall);
2866 
2867  llvm::Metadata *MD =
2869  llvm::Value *TypeId = llvm::MetadataAsValue::get(CGM.getLLVMContext(), MD);
2870 
2871  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2872  llvm::Value *CheckedLoad = Builder.CreateCall(
2873  CGM.getIntrinsic(llvm::Intrinsic::type_checked_load),
2874  {CastedVTable, llvm::ConstantInt::get(Int32Ty, VTableByteOffset),
2875  TypeId});
2876  llvm::Value *CheckResult = Builder.CreateExtractValue(CheckedLoad, 1);
2877 
2879  if (SanOpts.has(SanitizerKind::CFIVCall) &&
2880  !getContext().getNoSanitizeList().containsType(SanitizerKind::CFIVCall,
2881  TypeName)) {
2882  EmitCheck(std::make_pair(CheckResult, SanitizerKind::CFIVCall),
2883  SanitizerHandler::CFICheckFail, {}, {});
2884  }
2885 
2886  return Builder.CreateBitCast(Builder.CreateExtractValue(CheckedLoad, 0),
2887  VTableTy);
2888 }
2889 
2891  const CXXMethodDecl *callOperator,
2892  CallArgList &callArgs) {
2893  // Get the address of the call operator.
2894  const CGFunctionInfo &calleeFnInfo =
2895  CGM.getTypes().arrangeCXXMethodDeclaration(callOperator);
2896  llvm::Constant *calleePtr =
2897  CGM.GetAddrOfFunction(GlobalDecl(callOperator),
2898  CGM.getTypes().GetFunctionType(calleeFnInfo));
2899 
2900  // Prepare the return slot.
2901  const FunctionProtoType *FPT =
2902  callOperator->getType()->castAs<FunctionProtoType>();
2903  QualType resultType = FPT->getReturnType();
2904  ReturnValueSlot returnSlot;
2905  if (!resultType->isVoidType() &&
2906  calleeFnInfo.getReturnInfo().getKind() == ABIArgInfo::Indirect &&
2907  !hasScalarEvaluationKind(calleeFnInfo.getReturnType()))
2908  returnSlot =
2909  ReturnValueSlot(ReturnValue, resultType.isVolatileQualified(),
2910  /*IsUnused=*/false, /*IsExternallyDestructed=*/true);
2911 
2912  // We don't need to separately arrange the call arguments because
2913  // the call can't be variadic anyway --- it's impossible to forward
2914  // variadic arguments.
2915 
2916  // Now emit our call.
2917  auto callee = CGCallee::forDirect(calleePtr, GlobalDecl(callOperator));
2918  RValue RV = EmitCall(calleeFnInfo, callee, returnSlot, callArgs);
2919 
2920  // If necessary, copy the returned value into the slot.
2921  if (!resultType->isVoidType() && returnSlot.isNull()) {
2922  if (getLangOpts().ObjCAutoRefCount && resultType->isObjCRetainableType()) {
2924  }
2925  EmitReturnOfRValue(RV, resultType);
2926  } else
2928 }
2929 
2931  const BlockDecl *BD = BlockInfo->getBlockDecl();
2932  const VarDecl *variable = BD->capture_begin()->getVariable();
2933  const CXXRecordDecl *Lambda = variable->getType()->getAsCXXRecordDecl();
2934  const CXXMethodDecl *CallOp = Lambda->getLambdaCallOperator();
2935 
2936  if (CallOp->isVariadic()) {
2937  // FIXME: Making this work correctly is nasty because it requires either
2938  // cloning the body of the call operator or making the call operator
2939  // forward.
2940  CGM.ErrorUnsupported(CurCodeDecl, "lambda conversion to variadic function");
2941  return;
2942  }
2943 
2944  // Start building arguments for forwarding call
2945  CallArgList CallArgs;
2946 
2947  QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
2948  Address ThisPtr = GetAddrOfBlockDecl(variable);
2949  CallArgs.add(RValue::get(ThisPtr.getPointer()), ThisType);
2950 
2951  // Add the rest of the parameters.
2952  for (auto param : BD->parameters())
2953  EmitDelegateCallArg(CallArgs, param, param->getBeginLoc());
2954 
2955  assert(!Lambda->isGenericLambda() &&
2956  "generic lambda interconversion to block not implemented");
2957  EmitForwardingCallToLambda(CallOp, CallArgs);
2958 }
2959 
2961  const CXXRecordDecl *Lambda = MD->getParent();
2962 
2963  // Start building arguments for forwarding call
2964  CallArgList CallArgs;
2965 
2966  QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
2967  llvm::Value *ThisPtr = llvm::UndefValue::get(getTypes().ConvertType(ThisType));
2968  CallArgs.add(RValue::get(ThisPtr), ThisType);
2969 
2970  // Add the rest of the parameters.
2971  for (auto Param : MD->parameters())
2972  EmitDelegateCallArg(CallArgs, Param, Param->getBeginLoc());
2973 
2974  const CXXMethodDecl *CallOp = Lambda->getLambdaCallOperator();
2975  // For a generic lambda, find the corresponding call operator specialization
2976  // to which the call to the static-invoker shall be forwarded.
2977  if (Lambda->isGenericLambda()) {
2978  assert(MD->isFunctionTemplateSpecialization());
2980  FunctionTemplateDecl *CallOpTemplate = CallOp->getDescribedFunctionTemplate();
2981  void *InsertPos = nullptr;
2982  FunctionDecl *CorrespondingCallOpSpecialization =
2983  CallOpTemplate->findSpecialization(TAL->asArray(), InsertPos);
2984  assert(CorrespondingCallOpSpecialization);
2985  CallOp = cast<CXXMethodDecl>(CorrespondingCallOpSpecialization);
2986  }
2987  EmitForwardingCallToLambda(CallOp, CallArgs);
2988 }
2989 
2991  if (MD->isVariadic()) {
2992  // FIXME: Making this work correctly is nasty because it requires either
2993  // cloning the body of the call operator or making the call operator forward.
2994  CGM.ErrorUnsupported(MD, "lambda conversion to variadic function");
2995  return;
2996  }
2997 
2999 }
clang::CodeGen::CodeGenFunction::EmitCfiSlowPathCheck
void EmitCfiSlowPathCheck(SanitizerMask Kind, llvm::Value *Cond, llvm::ConstantInt *TypeId, llvm::Value *Ptr, ArrayRef< llvm::Constant * > StaticArgs)
Emit a slow path cross-DSO CFI check which calls __cfi_slowpath if Cond if false.
Definition: CGExpr.cpp:3388
clang::CXXMethodDecl::getThisType
QualType getThisType() const
Return the type of the this pointer.
Definition: DeclCXX.cpp:2452
clang::CodeGen::CodeGenFunction::SanitizerScope
RAII object to set/unset CodeGenFunction::IsSanitizerScope.
Definition: CodeGenFunction.h:524
clang::CodeGen::CodeGenFunction::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T)
Definition: CodeGenFunction.cpp:208
clang::CodeGen::CodeGenFunction::EmitVTablePtrCheckForCall
void EmitVTablePtrCheckForCall(const CXXRecordDecl *RD, llvm::Value *VTable, CFITypeCheckKind TCK, SourceLocation Loc)
EmitVTablePtrCheckForCall - Virtual method MD is being called via VTable.
Definition: CGClass.cpp:2714
clang::GlobalDecl::getDtorType
CXXDtorType getDtorType() const
Definition: GlobalDecl.h:110
clang::CodeGen::CodeGenFunction::destroyCXXObject
static Destroyer destroyCXXObject
Definition: CodeGenFunction.h:2914
clang::FunctionProtoType::param_type_begin
param_type_iterator param_type_begin() const
Definition: Type.h:4267
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:1129
clang::CodeGen::CGRecordLayout::getBitFieldInfo
const CGBitFieldInfo & getBitFieldInfo(const FieldDecl *FD) const
Return the BitFieldInfo that corresponds to the field FD.
Definition: CGRecordLayout.h:222
clang::CodeGen::CGBuilderTy::CreateMemCpy
llvm::CallInst * CreateMemCpy(Address Dest, Address Src, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:309
clang::CodeGen::CodeGenFunction::EvaluationOrder::Default
@ Default
! No language constraints on evaluation order.
clang::CXXCtorInitializer::getAnyMember
FieldDecl * getAnyMember() const
Definition: DeclCXX.h:2335
clang::CodeGen::CodeGenTypeCache::SizeTy
llvm::IntegerType * SizeTy
Definition: CodeGenTypeCache.h:50
max
__DEVICE__ int max(int __a, int __b)
Definition: __clang_cuda_math.h:196
clang::Dtor_Base
@ Dtor_Base
Base object dtor.
Definition: ABI.h:36
clang::CodeGen::CodeGenFunction::EmitTrapCall
llvm::CallInst * EmitTrapCall(llvm::Intrinsic::ID IntrID)
Emit a call to trap or debugtrap and attach function attribute "trap-func-name" if specified.
Definition: CGExpr.cpp:3598
clang::FunctionDecl::isDefaulted
bool isDefaulted() const
Whether this function is defaulted.
Definition: Decl.h:2231
clang::CodeGen::CodeGenFunction::EmitLambdaStaticInvokeBody
void EmitLambdaStaticInvokeBody(const CXXMethodDecl *MD)
Definition: CGClass.cpp:2990
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Definition: CGValue.h:154
clang::BlockDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:4287
clang::CXXMethodDecl::getThisObjectType
QualType getThisObjectType() const
Return the type of the object pointed by this.
Definition: DeclCXX.cpp:2463
clang::ASTRecordLayout::getFieldOffset
uint64_t getFieldOffset(unsigned FieldNo) const
getFieldOffset - Get the offset of the given field index, in bits.
Definition: RecordLayout.h:200
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llvm::PointerType * Int8PtrTy
Definition: CodeGenTypeCache.h:57
llvm
YAML serialization mapping.
Definition: Dominators.h:30
clang::CXXConstructorDecl
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2421
clang::CXXBaseSpecifier::getType
QualType getType() const
Retrieves the type of the base class.
Definition: DeclCXX.h:245
clang::ASTContext::getTypeDeclType
QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl *PrevDecl=nullptr) const
Return the unique reference to the type for the specified type declaration.
Definition: ASTContext.h:1569
clang::CXXMethodDecl::isCopyAssignmentOperator
bool isCopyAssignmentOperator() const
Determine whether this is a copy-assignment operator, regardless of whether it was declared implicitl...
Definition: DeclCXX.cpp:2360
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:1956
clang::FunctionDecl::getNumParams
unsigned getNumParams() const
Return the number of parameters this function must have based on its FunctionType.
Definition: Decl.cpp:3442
clang::CodeGen::CodeGenFunction::LoadCXXThis
llvm::Value * LoadCXXThis()
LoadCXXThis - Load the value of 'this'.
Definition: CodeGenFunction.h:2804
clang::CharUnits::alignmentOfArrayElement
CharUnits alignmentOfArrayElement(CharUnits elementSize) const
Given that this is the alignment of the first element of an array, return the minimum alignment of an...
Definition: CharUnits.h:201
clang::CodeGen::CodeGenFunction::EmitVTablePtrCheck
void EmitVTablePtrCheck(const CXXRecordDecl *RD, llvm::Value *VTable, CFITypeCheckKind TCK, SourceLocation Loc)
EmitVTablePtrCheck - Emit a check that VTable is a valid virtual table for RD using llvm....
Definition: CGClass.cpp:2769
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@ TEK_Aggregate
Definition: CodeGenFunction.h:109
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::ASTContext::getCharWidth
uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2289
clang::CodeGen::CodeGenModule::CreateRuntimeFunction
llvm::FunctionCallee CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name, llvm::AttributeList ExtraAttrs=llvm::AttributeList(), bool Local=false, bool AssumeConvergent=false)
Create or return a runtime function declaration with the specified type and name.
Definition: CodeGenModule.cpp:4025
clang::CXXCtorInitializer::getBaseClass
const Type * getBaseClass() const
If this is a base class initializer, returns the type of the base class.
Definition: DeclCXX.cpp:2533
clang::CXXRecordDecl::isEffectivelyFinal
bool isEffectivelyFinal() const
Determine whether it's impossible for a class to be derived from this class.
Definition: DeclCXX.cpp:2021
type
clang::CodeGen::CodeGenFunction::sanitizePerformTypeCheck
bool sanitizePerformTypeCheck() const
Whether any type-checking sanitizers are enabled.
Definition: CGExpr.cpp:668
clang::CodeGen::CodeGenModule::getItaniumVTableContext
ItaniumVTableContext & getItaniumVTableContext()
Definition: CodeGenModule.h:725
clang::CodeGen::CodeGenFunction::EmitCheckSourceLocation
llvm::Constant * EmitCheckSourceLocation(SourceLocation Loc)
Emit a description of a source location in a format suitable for passing to a runtime sanitizer handl...
Definition: CGExpr.cpp:3144
clang::Decl::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:421
clang::CodeGen::ABIArgInfo::getKind
Kind getKind() const
Definition: CGFunctionInfo.h:295
clang::CodeGen::CodeGenFunction::EmitTrapCheck
void EmitTrapCheck(llvm::Value *Checked, SanitizerHandler CheckHandlerID)
Create a basic block that will call the trap intrinsic, and emit a conditional branch to it,...
Definition: CGExpr.cpp:3559
clang::RecordDecl::mayInsertExtraPadding
bool mayInsertExtraPadding(bool EmitRemark=false) const
Whether we are allowed to insert extra padding between fields.
Definition: Decl.cpp:4740
CodeGenFunction.h
clang::CodeGen::CodeGenFunction::MakeNaturalAlignPointeeAddrLValue
LValue MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T)
Given a value of type T* that may not be to a complete object, construct an l-value with the natural ...
Definition: CodeGenFunction.cpp:198
string
string(SUBSTRING ${CMAKE_CURRENT_BINARY_DIR} 0 ${PATH_LIB_START} PATH_HEAD) string(SUBSTRING $
Definition: CMakeLists.txt:22
clang::CodeGen::CodeGenFunction::EmitCall
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee, ReturnValueSlot ReturnValue, const CallArgList &Args, llvm::CallBase **callOrInvoke, bool IsMustTail, SourceLocation Loc)
EmitCall - Generate a call of the given function, expecting the given result type,...
Definition: CGCall.cpp:4687
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:542
clang::CodeGen::CodeGenFunction::CurCodeDecl
const Decl * CurCodeDecl
CurCodeDecl - This is the inner-most code context, which includes blocks.
Definition: CodeGenFunction.h:322
clang::CodeGen::CGCXXABI::LoadVTablePtr
virtual std::pair< llvm::Value *, const CXXRecordDecl * > LoadVTablePtr(CodeGenFunction &CGF, Address This, const CXXRecordDecl *RD)=0
Load a vtable from This, an object of polymorphic type RD, or from one of its virtual bases if it doe...
clang::ItaniumVTableContext::isRelativeLayout
bool isRelativeLayout() const
Definition: VTableBuilder.h:437
clang::CXXConstructExpr::getNumArgs
unsigned getNumArgs() const
Return the number of arguments to the constructor call.
Definition: ExprCXX.h:1608
clang::ConstantArrayType
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2942
clang::FieldDecl::isZeroSize
bool isZeroSize(const ASTContext &Ctx) const
Determine if this field is a subobject of zero size, that is, either a zero-length bit-field or a fie...
Definition: Decl.cpp:4268
clang::CodeGen::AggValueSlot::DoesNotNeedGCBarriers
@ DoesNotNeedGCBarriers
Definition: CGValue.h:554
clang::CodeGen::CodeGenFunction::EmitNounwindRuntimeCall
llvm::CallInst * EmitNounwindRuntimeCall(llvm::FunctionCallee callee, const Twine &name="")
clang::CodeGen::Address::getAlignment
CharUnits getAlignment() const
Return the alignment of this pointer.
Definition: Address.h:120
clang::CodeGen::CodeGenModule::getDynamicOffsetAlignment
CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign, const CXXRecordDecl *Class, CharUnits ExpectedTargetAlign)
Given a class pointer with an actual known alignment, and the expected alignment of an object at a dy...
Definition: CGClass.cpp:89
clang::CodeGen::CodeGenModule::GetAddrOfFunction
llvm::Constant * GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty=nullptr, bool ForVTable=false, bool DontDefer=false, ForDefinition_t IsForDefinition=NotForDefinition)
Return the address of the given function.
Definition: CodeGenModule.cpp:3937
HasTrivialDestructorBody
static bool HasTrivialDestructorBody(ASTContext &Context, const CXXRecordDecl *BaseClassDecl, const CXXRecordDecl *MostDerivedClassDecl)
Definition: CGClass.cpp:1351
clang::CodeGen::CodeGenFunction::EmitSynthesizedCXXCopyCtorCall
void EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D, Address This, Address Src, const CXXConstructExpr *E)
Definition: CGClass.cpp:2352
llvm::SmallVector
Definition: LLVM.h:38
clang::RecordDecl::field_empty
bool field_empty() const
Definition: Decl.h:4135
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6527
clang::FunctionTemplateDecl::findSpecialization
FunctionDecl * findSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the specialization with the provided arguments if it exists, otherwise return the insertion po...
Definition: DeclTemplate.cpp:385
clang::CodeGen::CodeGenModule::HasHiddenLTOVisibility
bool HasHiddenLTOVisibility(const CXXRecordDecl *RD)
Returns whether the given record has hidden LTO visibility and therefore may participate in (single-m...
Definition: CGVTables.cpp:1198
clang::CodeGen::CodeGenFunction::CFITCK_VCall
@ CFITCK_VCall
Definition: CodeGenFunction.h:2295
clang::CodeGen::LValue::getAddress
Address getAddress(CodeGenFunction &CGF) const
Definition: CGValue.h:341
clang::CodeGen::CodeGenFunction::EmitDestructorBody
void EmitDestructorBody(FunctionArgList &Args)
EmitDestructorBody - Emits the body of the current destructor.
Definition: CGClass.cpp:1437
EmitLValueForAnyFieldInitialization
static void EmitLValueForAnyFieldInitialization(CodeGenFunction &CGF, CXXCtorInitializer *MemberInit, LValue &LHS)
Definition: CGClass.cpp:614
EvaluatedExprVisitor.h
clang::QualType::getNonReferenceType
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:6696
clang::CodeGen::CodeGenFunction::emitArrayLength
llvm::Value * emitArrayLength(const ArrayType *arrayType, QualType &baseType, Address &addr)
emitArrayLength - Compute the length of an array, even if it's a VLA, and drill down to the base elem...
Definition: CodeGenFunction.cpp:2057
CXXInheritance.h
clang::Stmt::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:324
clang::CXXConstructorDecl::isDelegatingConstructor
bool isDelegatingConstructor() const
Determine whether this constructor is a delegating constructor.
Definition: DeclCXX.h:2576
CGRecordLayout.h
clang::CharUnits::QuantityType
int64_t QuantityType
Definition: CharUnits.h:40
clang::CodeGen::CGCXXABI::NeedsVTTParameter
virtual bool NeedsVTTParameter(GlobalDecl GD)
Return whether the given global decl needs a VTT parameter.
Definition: CGCXXABI.cpp:322
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:675
clang::TypeDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: Decl.h:3182
clang::ASTContext::getTargetAddressSpace
unsigned getTargetAddressSpace(QualType T) const
Definition: ASTContext.cpp:11998
Attr.h
clang::FunctionDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:2526
AttributeLangSupport::C
@ C
Definition: SemaDeclAttr.cpp:55
clang::ASTRecordLayout::getBaseClassOffset
CharUnits getBaseClassOffset(const CXXRecordDecl *Base) const
getBaseClassOffset - Get the offset, in chars, for the given base class.
Definition: RecordLayout.h:249
clang::SanitizerSet::has
bool has(SanitizerMask K) const
Check if a certain (single) sanitizer is enabled.
Definition: Sanitizers.h:155
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:697
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2855
clang::CodeGen::CGCXXABI::isVirtualOffsetNeededForVTableField
virtual bool isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF, CodeGenFunction::VPtr Vptr)=0
Checks if ABI requires extra virtual offset for vtable field.
clang::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:6789
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:147
clang::TargetInfo::getCXXABI
TargetCXXABI getCXXABI() const
Get the C++ ABI currently in use.
Definition: TargetInfo.h:1233
clang::TargetCXXABI::isItaniumFamily
bool isItaniumFamily() const
Does this ABI generally fall into the Itanium family of ABIs?
Definition: TargetCXXABI.h:124
clang::Decl::isUsed
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required.
Definition: DeclBase.cpp:443
clang::CodeGen::CodeGenVTables::GetAddrOfVTT
llvm::GlobalVariable * GetAddrOfVTT(const CXXRecordDecl *RD)
GetAddrOfVTT - Get the address of the VTT for the given record decl.
Definition: CGVTT.cpp:104
clang::CXXCtorInitializer::isBaseInitializer
bool isBaseInitializer() const
Determine whether this initializer is initializing a base class.
Definition: DeclCXX.h:2261
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:2430
clang::CodeGen::CodeGenModule::getMinimumClassObjectSize
CharUnits getMinimumClassObjectSize(const CXXRecordDecl *CD)
Returns the minimum object size for an object of the given class type (or a class derived from it).
Definition: CGClass.cpp:57
clang::CodeGen::CGBuilderTy::CreateStore
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:97
clang::CodeGen::CodeGenFunction::emitImplicitAssignmentOperatorBody
void emitImplicitAssignmentOperatorBody(FunctionArgList &Args)
Definition: CGClass.cpp:1550
clang::ASTRecordLayout::getSize
CharUnits getSize() const
getSize - Get the record size in characters.
Definition: RecordLayout.h:193
clang::CodeGen::AggValueSlot::mayOverlap
Overlap_t mayOverlap() const
Definition: CGValue.h:643
TargetInfo.h
llvm::Optional< unsigned >
llvm::SmallPtrSet
Definition: ASTContext.h:82
clang::UnaryOperator
UnaryOperator - This represents the unary-expression's (except sizeof and alignof),...
Definition: Expr.h:2163
clang::Ctor_Base
@ Ctor_Base
Base object ctor.
Definition: ABI.h:26
clang::CodeGen::CodeGenModule::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenModule.h:698
clang::Ctor_Complete
@ Ctor_Complete
Complete object ctor.
Definition: ABI.h:25
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:7037
clang::CXXRecordDecl::isGenericLambda
bool isGenericLambda() const
Determine whether this class describes a generic lambda function object (i.e.
Definition: DeclCXX.cpp:1480
clang::FunctionDecl::getTemplateSpecializationArgs
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3890
clang::CodeGen::CodeGenFunction::EmitLambdaDelegatingInvokeBody
void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD)
Definition: CGClass.cpp:2960
clang::CodeGen::CodeGenFunction::HaveInsertPoint
bool HaveInsertPoint() const
HaveInsertPoint - True if an insertion point is defined.
Definition: CodeGenFunction.h:2471
clang::ASTRecordLayout::getPrimaryBase
const CXXRecordDecl * getPrimaryBase() const
getPrimaryBase - Get the primary base for this record.
Definition: RecordLayout.h:234
clang::CodeGen::CodeGenFunction::EmitLValueForField
LValue EmitLValueForField(LValue Base, const FieldDecl *Field)
Definition: CGExpr.cpp:4357
clang::CodeGen::CodeGenFunction::getDestroyer
Destroyer * getDestroyer(QualType::DestructionKind destructionKind)
Definition: CGDecl.cpp:2091
clang::CXXCtorInitializer::isAnyMemberInitializer
bool isAnyMemberInitializer() const
Definition: DeclCXX.h:2269
clang::CodeGen::EHCleanup
@ EHCleanup
Denotes a cleanup that should run when a scope is exited using exceptional control flow (a throw stat...
Definition: EHScopeStack.h:80
clang::CXXInheritedCtorInitExpr::getLocation
SourceLocation getLocation() const LLVM_READONLY
Definition: ExprCXX.h:1702
clang::CXXDestructorDecl::getOperatorDelete
const FunctionDecl * getOperatorDelete() const
Definition: DeclCXX.h:2721
clang::CharUnits::alignmentAtOffset
CharUnits alignmentAtOffset(CharUnits offset) const
Given that this is a non-zero alignment value, what is the alignment at the given offset?
Definition: CharUnits.h:194
clang::CodeGen::CodeGenFunction::EmitDelegateCXXConstructorCall
void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor, CXXCtorType CtorType, const FunctionArgList &Args, SourceLocation Loc)
Definition: CGClass.cpp:2379
clang::CodeGen::CodeGenFunction::EmitARCRetainAutoreleasedReturnValue
llvm::Value * EmitARCRetainAutoreleasedReturnValue(llvm::Value *value)
Retain the given object which is the result of a function call.
Definition: CGObjC.cpp:2387
clang::ento::Store
const void * Store
Store - This opaque type encapsulates an immutable mapping from locations to values.
Definition: StoreRef.h:27
clang::CodeGen::CodeGenFunction::EmitStmt
void EmitStmt(const Stmt *S, ArrayRef< const Attr * > Attrs=None)
EmitStmt - Emit the code for the statement.
Definition: CGStmt.cpp:53
clang::CodeGen::CodeGenModule::computeNonVirtualBaseClassOffset
CharUnits computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass, CastExpr::path_const_iterator Start, CastExpr::path_const_iterator End)
Definition: CGClass.cpp:169
clang::ASTContext::toBits
int64_t toBits(CharUnits CharSize) const
Convert a size in characters to a size in bits.
Definition: ASTContext.cpp:2456
clang::CodeGen::CGFunctionInfo::getReturnType
CanQualType getReturnType() const
Definition: CGFunctionInfo.h:709
End
SourceLocation End
Definition: USRLocFinder.cpp:167
clang::CXXCtorInitializer::getIndirectMember
IndirectFieldDecl * getIndirectMember() const
Definition: DeclCXX.h:2343
clang::CodeGen::CodeGenFunction::EmitExprAsInit
void EmitExprAsInit(const Expr *init, const ValueDecl *D, LValue lvalue, bool capturedByInit)
EmitExprAsInit - Emits the code necessary to initialize a location in memory with the given initializ...
Definition: CGDecl.cpp:1933
clang::CodeGen::CGCXXABI::EmitDestructorCall
virtual void EmitDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This, QualType ThisTy)=0
Emit the destructor call.
clang::CodeGen::CodeGenFunction::EmitInitializerForField
void EmitInitializerForField(FieldDecl *Field, LValue LHS, Expr *Init)
Definition: CGClass.cpp:690
clang::CodeGen::CodeGenFunction::GetVTTParameter
llvm::Value * GetVTTParameter(GlobalDecl GD, bool ForVirtualBase, bool Delegating)
GetVTTParameter - Return the VTT parameter that should be passed to a base constructor/destructor wit...
Definition: CGClass.cpp:460
clang::CodeGen::CallArgList::add
void add(RValue rvalue, QualType type)
Definition: CGCall.h:286
clang::CXXCtorInitializer::isIndirectMemberInitializer
bool isIndirectMemberInitializer() const
Definition: DeclCXX.h:2273
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:2118
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:269
CGDebugInfo.h
CanSkipVTablePointerInitialization
static bool CanSkipVTablePointerInitialization(CodeGenFunction &CGF, const CXXDestructorDecl *Dtor)
CanSkipVTablePointerInitialization - Check whether we need to initialize any vtable pointers before c...
Definition: CGClass.cpp:1414
clang::Dtor_Complete
@ Dtor_Complete
Complete object dtor.
Definition: ABI.h:35
clang::CodeGen::CodeGenTypes::ConvertType
llvm::Type * ConvertType(QualType T)
ConvertType - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:401
clang::CXXRecordDecl::getLambdaCallOperator
CXXMethodDecl * getLambdaCallOperator() const
Retrieve the lambda call operator of the closure type if this is a closure type.
Definition: DeclCXX.cpp:1511
clang::FunctionProtoType::isVariadic
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4230
clang::CXXMethodDecl::isMoveAssignmentOperator
bool isMoveAssignmentOperator() const
Determine whether this is a move assignment operator.
Definition: DeclCXX.cpp:2381
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1500
clang::CodeGen::CodeGenTypeCache::VoidPtrTy
llvm::PointerType * VoidPtrTy
Definition: CodeGenTypeCache.h:56
clang::CodeGen::CodeGenFunction::EmitCXXAggrConstructorCall
void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D, const ArrayType *ArrayTy, Address ArrayPtr, const CXXConstructExpr *E, bool NewPointerIsChecked, bool ZeroInitialization=false)
EmitCXXAggrConstructorCall - Emit a loop to call a particular constructor for each of several members...
Definition: CGClass.cpp:1942
clang::CodeGen::CodeGenFunction::EmitTypeMetadataCodeForVCall
void EmitTypeMetadataCodeForVCall(const CXXRecordDecl *RD, llvm::Value *VTable, SourceLocation Loc)
If whole-program virtual table optimization is enabled, emit an assumption that VTable is a member of...
Definition: CGClass.cpp:2692
clang::CXXCtorInitializer::getSourceLocation
SourceLocation getSourceLocation() const
Determine the source location of the initializer.
Definition: DeclCXX.cpp:2540
clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar
Address GetAddrOfLocalVar(const VarDecl *VD)
GetAddrOfLocalVar - Return the address of a local variable.
Definition: CodeGenFunction.h:2720
Offset
unsigned Offset
Definition: Format.cpp:2553
clang::CodeGen::CodeGenFunction::EmitCXXDestructorCall
void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This, QualType ThisTy)
Definition: CGClass.cpp:2465
clang::GlobalDecl
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:56
EmitMemberInitializer
static void EmitMemberInitializer(CodeGenFunction &CGF, const CXXRecordDecl *ClassDecl, CXXCtorInitializer *MemberInit, const CXXConstructorDecl *Constructor, FunctionArgList &Args)
Definition: CGClass.cpp:628
clang::CodeGen::CodeGenFunction::ShouldEmitVTableTypeCheckedLoad
bool ShouldEmitVTableTypeCheckedLoad(const CXXRecordDecl *RD)
Returns whether we should perform a type checked load when loading a virtual function for virtual cal...
Definition: CGClass.cpp:2843
clang::CodeGen::CodeGenFunction::getOverlapForFieldInit
AggValueSlot::Overlap_t getOverlapForFieldInit(const FieldDecl *FD)
Determine whether a field initialization may overlap some other object.
Definition: CGExprAgg.cpp:2017
clang::CodeGen::CodeGenFunction::EmitSanitizerStatReport
void EmitSanitizerStatReport(llvm::SanitizerStatKind SSK)
Definition: CodeGenFunction.cpp:2594
CodeGenOptions.h
clang::Qualifiers::getAddressSpace
LangAS getAddressSpace() const
Definition: Type.h:363
clang::CodeGen::ReturnValueSlot
ReturnValueSlot - Contains the address where the return value of a function can be stored,...
Definition: CGCall.h:360
clang::FunctionTemplateDecl
Declaration of a template function.
Definition: DeclTemplate.h:979
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6760
V
#define V(N, I)
Definition: ASTContext.h:3176
clang::BlockDecl::capture_begin
capture_const_iterator capture_begin() const
Definition: Decl.h:4330
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:872
min
__DEVICE__ int min(int __a, int __b)
Definition: __clang_cuda_math.h:197
clang::CodeGen::CodeGenFunction::BlockInfo
const CodeGen::CGBlockInfo * BlockInfo
Definition: CodeGenFunction.h:609
clang::CodeGen::CodeGenFunction::VPtr::NearestVBase
const CXXRecordDecl * NearestVBase
Definition: CodeGenFunction.h:2268
clang::CodeGen::TBAAAccessInfo
Definition: CodeGenTBAA.h:41
clang::CodeGen::CodeGenFunction::hasScalarEvaluationKind
static bool hasScalarEvaluationKind(QualType T)
Definition: CodeGenFunction.h:2421
clang::CodeGen::CGCXXABI::initializeHiddenVirtualInheritanceMembers
virtual void initializeHiddenVirtualInheritanceMembers(CodeGenFunction &CGF, const CXXRecordDecl *RD)
Emit the code to initialize hidden members required to handle virtual inheritance,...
Definition: CGCXXABI.h:302
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4647
clang::CodeGen::CodeGenModule::CreateMetadataIdentifierForType
llvm::Metadata * CreateMetadataIdentifierForType(QualType T)
Create a metadata identifier for the given type.
Definition: CodeGenModule.cpp:6633
clang::CodeGen::CodeGenFunction::TCK_UpcastToVirtualBase
@ TCK_UpcastToVirtualBase
Checking the operand of a cast to a virtual base object.
Definition: CodeGenFunction.h:2981
clang::CXXCtorType
CXXCtorType
C++ constructor types.
Definition: ABI.h:24
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1401
clang::CodeGen::CodeGenFunction::EmitVTableTypeCheckedLoad
llvm::Value * EmitVTableTypeCheckedLoad(const CXXRecordDecl *RD, llvm::Value *VTable, llvm::Type *VTableTy, uint64_t VTableByteOffset)
Emit a type checked load from the given vtable.
Definition: CGClass.cpp:2860
DeclTemplate.h
clang::SanitizerSet
Definition: Sanitizers.h:153
clang::CodeGen::AggValueSlot::IsSanitizerChecked
@ IsSanitizerChecked
Definition: CGValue.h:555
clang::CXXConstructExpr::arguments
arg_range arguments()
Definition: ExprCXX.h:1592
clang::CodeGen::EHScopeStack::Cleanup
Information for lazily generating a cleanup.
Definition: EHScopeStack.h:141
clang::CodeGen::CodeGenModule::getVBaseAlignment
CharUnits getVBaseAlignment(CharUnits DerivedAlign, const CXXRecordDecl *Derived, const CXXRecordDecl *VBase)
Returns the assumed alignment of a virtual base of a class.
Definition: CGClass.cpp:74
clang::CodeGen::CGCXXABI::getVTableAddressPoint
virtual llvm::Constant * getVTableAddressPoint(BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
Get the address point of the vtable for the given base subobject.
clang::ASTContext::getAsConstantArrayType
const ConstantArrayType * getAsConstantArrayType(QualType T) const
Definition: ASTContext.h:2690
clang::CodeGen::CodeGenFunction::emitDestroy
void emitDestroy(Address addr, QualType type, Destroyer *destroyer, bool useEHCleanupForArray)
emitDestroy - Immediately perform the destruction of the given object.
Definition: CGDecl.cpp:2192
clang::CXXRecordDecl::methods
method_range methods() const
Definition: DeclCXX.h:638
clang::FunctionDecl::isTrivial
bool isTrivial() const
Whether this function is "trivial" in some specialized C++ senses.
Definition: Decl.h:2223
clang::BlockDecl
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:4201
clang::QualType::getAddressSpace
LangAS getAddressSpace() const
Return the address space of this type.
Definition: Type.h:6621
clang::CodeGen::LValue::isVolatileQualified
bool isVolatileQualified() const
Definition: CGValue.h:272
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3807
clang::CodeGen::CodeGenModule::getClassPointerAlignment
CharUnits getClassPointerAlignment(const CXXRecordDecl *CD)
Returns the assumed alignment of an opaque pointer to the given class.
Definition: CGClass.cpp:38
getRecordType
static const RecordType * getRecordType(QualType QT)
Checks that the passed in QualType either is of RecordType or points to RecordType.
Definition: SemaDeclAttr.cpp:491
clang::CXXCtorInitializer::getInit
Expr * getInit() const
Get the initializer.
Definition: DeclCXX.h:2391
clang::CodeGen::CodeGenFunction::EmitVTableAssumptionLoad
void EmitVTableAssumptionLoad(const VPtr &vptr, Address This)
Emit assumption that vptr load == global vtable.
Definition: CGClass.cpp:2323
clang::XRayInstrKind::None
constexpr XRayInstrMask None
Definition: XRayInstr.h:38
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
clang::BaseSubobject
Definition: BaseSubobject.h:30
clang::CodeGen::CodeGenFunction::EmitCheck
void EmitCheck(ArrayRef< std::pair< llvm::Value *, SanitizerMask >> Checked, SanitizerHandler Check, ArrayRef< llvm::Constant * > StaticArgs, ArrayRef< llvm::Value * > DynamicArgs)
Create a basic block that will either trap or call a handler function in the UBSan runtime with the p...
Definition: CGExpr.cpp:3278
clang::CodeGen::CGCXXABI::addImplicitConstructorArgs
AddedStructorArgCounts addImplicitConstructorArgs(CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, CallArgList &Args)
Add any ABI-specific implicit arguments needed to call a constructor.
Definition: CGCXXABI.cpp:341
clang::CodeGen::EHScopeStack
A stack of scopes which respond to exceptions, including cleanups and catch blocks.
Definition: EHScopeStack.h:94
clang::CodeGen::LValue::isBitField
bool isBitField() const
Definition: CGValue.h:267
clang::CodeGen::CodeGenModule::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenModule.h:703
clang::CodeGen::Address::getType
llvm::PointerType * getType() const
Return the type of the pointer value.
Definition: Address.h:99
clang::ASTContext::getTypeInfoDataSizeInChars
TypeInfoChars getTypeInfoDataSizeInChars(QualType T) const
Definition: ASTContext.cpp:1838
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:208
clang::FunctionDecl::hasTrivialBody
bool hasTrivialBody() const
Returns whether the function has a trivial body that does not require any specific codegen.
Definition: Decl.cpp:3023
CGFunctionInfo.h
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:53
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2896
clang::CXXDtorType
CXXDtorType
C++ destructor types.
Definition: ABI.h:33
clang::DeclaratorContext::Member
@ Member
clang::MemberPointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2860
clang::CodeGen::TEK_Complex
@ TEK_Complex
Definition: CodeGenFunction.h:108
clang::FunctionDecl::getBody
Stmt * getBody(const FunctionDecl *&Definition) const
Retrieve the body (definition) of the function.
Definition: Decl.cpp:3092
clang::CodeGen::CodeGenFunction::EmitTypeCheck
void EmitTypeCheck(TypeCheckKind TCK, SourceLocation Loc, llvm::Value *V, QualType Type, CharUnits Alignment=CharUnits::Zero(), SanitizerSet SkippedChecks=SanitizerSet(), llvm::Value *ArraySize=nullptr)
Emit a check that V is the address of storage of the appropriate size and alignment for an object of ...
Definition: CGExpr.cpp:675
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:7243
clang::CodeGen::CodeGenFunction::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenFunction.h:2024
clang::CXXRecordDecl::getNumBases
unsigned getNumBases() const
Retrieves the number of base classes of this class.
Definition: DeclCXX.h:590
clang::CodeGen::CGCXXABI::getVTableAddressPointInStructor
virtual llvm::Value * getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD, BaseSubobject Base, const CXXRecordDecl *NearestVBase)=0
Get the address point of the vtable for the given base subobject while building a constructor or a de...
canEmitDelegateCallArgs
static bool canEmitDelegateCallArgs(CodeGenFunction &CGF, const CXXConstructorDecl *Ctor, CXXCtorType Type, CallArgList &Args)
Definition: CGClass.cpp:2130
clang::CodeGen::CodeGenTypeCache::VoidTy
llvm::Type * VoidTy
void
Definition: CodeGenTypeCache.h:34
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Suffix
unsigned Suffix
Definition: CGCXXABI.h:335
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:2393
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:210
clang::CXXConstructorDecl::isCopyOrMoveConstructor
bool isCopyOrMoveConstructor(unsigned &TypeQuals) const
Determine whether this is a copy or move constructor.
Definition: DeclCXX.cpp:2654
clang::CodeGen::CodeGenModule::getTBAAVTablePtrAccessInfo
TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType)
getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an access to a virtual table poi...
Definition: CodeGenModule.cpp:993
clang::CodeGen::CGRecordLayout
CGRecordLayout - This class handles struct and union layout info while lowering AST types to LLVM typ...
Definition: CGRecordLayout.h:121
clang::CharUnits::One
static CharUnits One()
One - Construct a CharUnits quantity of one.
Definition: CharUnits.h:58
clang::index::SymbolKind::Field
@ Field
clang::CXXDestructorDecl
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2688
clang::CodeGen::CodeGenFunction::getCleanupKind
CleanupKind getCleanupKind(QualType::DestructionKind kind)
Definition: CodeGenFunction.h:2090
clang::Qualifiers::hasObjCLifetime
bool hasObjCLifetime() const
Definition: Type.h:336
clang::CodeGen::AggValueSlot::MayOverlap
@ MayOverlap
Definition: CGValue.h:553
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:2075
clang::CodeGen::CodeGenFunction::pushEHDestroy
void pushEHDestroy(QualType::DestructionKind dtorKind, Address addr, QualType type)
pushEHDestroy - Push the standard destructor for the given type as an EH-only cleanup.
Definition: CGDecl.cpp:2108
clang::TypeInfoChars::Width
CharUnits Width
Definition: ASTContext.h:193
clang::ASTContext::getRecordType
QualType getRecordType(const RecordDecl *Decl) const
Definition: ASTContext.cpp:4638
clang::CodeGen::CodeGenTypes::arrangeCXXMethodDeclaration
const CGFunctionInfo & arrangeCXXMethodDeclaration(const CXXMethodDecl *MD)
C++ methods have some special rules and also have implicit parameters.
Definition: CGCall.cpp:292
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:874
clang::CodeGen::CodeGenFunction::PushDestructorCleanup
void PushDestructorCleanup(QualType T, Address Addr)
PushDestructorCleanup - Push a cleanup to call the complete-object destructor of an object of the giv...
Definition: CGClass.cpp:2496
clang::CodeGen::CodeGenTypeCache::PointerWidthInBits
unsigned char PointerWidthInBits
The width of a pointer into the generic address space.
Definition: CodeGenTypeCache.h:92
clang::CXXConstructorDecl::init_end
init_iterator init_end()
Retrieve an iterator past the last initializer.
Definition: DeclCXX.h:2529
clang::Type::getPointeeType
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee.
Definition: Type.cpp:625
clang::CodeGen::CodeGenFunction::CreateIRTemp
Address CreateIRTemp(QualType T, const Twine &Name="tmp")
CreateIRTemp - Create a temporary IR object of the given type, with appropriate alignment.
Definition: CGExpr.cpp:130
clang::CodeGen::CodeGenFunction::GetVTablePtr
llvm::Value * GetVTablePtr(Address This, llvm::Type *VTableTy, const CXXRecordDecl *VTableClass)
GetVTablePtr - Return the Value of the vtable pointer member pointed to by This.
Definition: CGClass.cpp:2642
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's arguments...
Definition: CGClass.cpp:2231
clang::CodeGen::CodeGenModule::getTypes
CodeGenTypes & getTypes()
Definition: CodeGenModule.h:721
clang::CXXConstructExpr::getConstructor
CXXConstructorDecl * getConstructor() const
Get the constructor that this expression will (ultimately) call.
Definition: ExprCXX.h:1532
clang::ASTContext::getCanonicalType
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2508
clang::Type::getAsCXXRecordDecl
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1759
clang::TagDecl::isUnion
bool isUnion() const
Definition: Decl.h:3554
clang::CodeGen::AggValueSlot::IsDestructed
@ IsDestructed
Definition: CGValue.h:551
clang::CXXRecordDecl::bases
base_class_range bases()
Definition: DeclCXX.h:596
clang::CXXCtorInitializer::isBaseVirtual
bool isBaseVirtual() const
Returns whether the base is virtual or not.
Definition: DeclCXX.h:2315
clang::CodeGen::CodeGenFunction::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenFunction.h:2025
clang::CodeGen::CGBitFieldInfo::StorageOffset
CharUnits StorageOffset
The offset of the bitfield storage from the start of the struct.
Definition: CGRecordLayout.h:81
clang::CodeGen::CGBuilderTy::CreateConstInBoundsByteGEP
Address CreateConstInBoundsByteGEP(Address Addr, CharUnits Offset, const llvm::Twine &Name="")
Given a pointer to i8, adjust it by a given constant offset.
Definition: CGBuilder.h:274
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1982
clang::CodeGen::CodeGenFunction::CFITypeCheckKind
CFITypeCheckKind
Definition: CodeGenFunction.h:2294
clang::MemberPointerType::getClass
const Type * getClass() const
Definition: Type.h:2874
clang::CodeGen::ABIArgInfo::Indirect
@ Indirect
Indirect - Pass the argument indirectly via a hidden pointer with the specified alignment (0 indicate...
Definition: CGFunctionInfo.h:49
clang::CharUnits::Zero
static CharUnits Zero()
Zero - Construct a CharUnits quantity of zero.
Definition: CharUnits.h:53
clang::CodeGen::CodeGenTypes::inheritingCtorHasParams
bool inheritingCtorHasParams(const InheritedConstructor &Inherited, CXXCtorType Type)
Determine if a C++ inheriting constructor should have parameters matching those of its inherited cons...
Definition: CGCall.cpp:309
clang::CodeGen::CodeGenFunction::incrementProfileCounter
void incrementProfileCounter(const Stmt *S, llvm::Value *StepV=nullptr)
Increment the profiler's counter for the given statement by StepV.
Definition: CodeGenFunction.h:1523
clang::CodeGen::Address
An aligned address.
Definition: Address.h:74
Base
clang::CodeGen::RValue::isComplex
bool isComplex() const
Definition: CGValue.h:55
clang::CXXInheritedCtorInitExpr
Represents a call to an inherited base class constructor from an inheriting constructor.
Definition: ExprCXX.h:1651
clang::CodeGen::CodeGenFunction::EmitVTableAssumptionLoads
void EmitVTableAssumptionLoads(const CXXRecordDecl *ClassDecl, Address This)
Emit assumption load for all bases.
Definition: CGClass.cpp:2344
isMemcpyEquivalentSpecialMember
static bool isMemcpyEquivalentSpecialMember(const CXXMethodDecl *D)
Definition: CGClass.cpp:597
clang::TagDecl::isCompleteDefinition
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3453
clang::CodeGen::CodeGenFunction::SanOpts
SanitizerSet SanOpts
Sanitizers enabled for this function.
Definition: CodeGenFunction.h:518
clang::CodeGen::CGBuilderTy::CreateGEP
Address CreateGEP(Address Addr, llvm::Value *Index, const llvm::Twine &Name="")
Definition: CGBuilder.h:261
clang::CodeGen::CodeGenFunction::getEvaluationKind
static TypeEvaluationKind getEvaluationKind(QualType T)
getEvaluationKind - Return the TypeEvaluationKind of QualType T.
Definition: CodeGenFunction.cpp:216
clang::CodeGen::CodeGenFunction::EvaluationOrder
EvaluationOrder
Definition: CodeGenFunction.h:4724
clang::CodeGen::CodeGenFunction::TCK_ConstructorCall
@ TCK_ConstructorCall
Checking the 'this' pointer for a constructor call.
Definition: CodeGenFunction.h:2969
clang::CodeGen::Address::getAddressSpace
unsigned getAddressSpace() const
Return the address space that this address resides in.
Definition: Address.h:110
clang::CodeGen::CodeGenFunction::EmitLambdaBlockInvokeBody
void EmitLambdaBlockInvokeBody()
Definition: CGClass.cpp:2930
clang::ast_matchers::arrayType
const AstTypeMatcher< ArrayType > arrayType
Matches all kinds of arrays.
Definition: ASTMatchersInternal.cpp:1034
clang::CodeGen::CodeGenFunction::EmitConstructorBody
void EmitConstructorBody(FunctionArgList &Args)
EmitConstructorBody - Emits the body of the current constructor.
Definition: CGClass.cpp:838
clang::CodeGen::CodeGenFunction::TCK_Upcast
@ TCK_Upcast
Checking the operand of a cast to a base object.
Definition: CodeGenFunction.h:2978
clang::RecordDecl::isAnonymousStructOrUnion
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3974
clang::CodeGen::CodeGenFunction::VPtr::OffsetFromNearestVBase
CharUnits OffsetFromNearestVBase
Definition: CodeGenFunction.h:2269
clang::CXXRecordDecl::vbases
base_class_range vbases()
Definition: DeclCXX.h:613
clang::Decl::isImplicit
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:558
clang::CodeGen::CodeGenFunction::GetAddrOfBlockDecl
Address GetAddrOfBlockDecl(const VarDecl *var)
Definition: CGBlocks.cpp:1251
clang::MemberExpr::getMemberDecl
ValueDecl * getMemberDecl() const
Retrieve the member declaration to which this expression refers.
Definition: Expr.h:3247
clang::CodeGen::CGCallee::forDirect
static CGCallee forDirect(llvm::Constant *functionPtr, const CGCalleeInfo &abstractInfo=CGCalleeInfo())
Definition: CGCall.h:133
clang::interp::Null
bool Null(InterpState &S, CodePtr OpPC)
Definition: Interp.h:820
clang::CodeGen::CodeGenModule::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenModule.h:709
clang::CodeGen::CodeGenFunction::CurGD
GlobalDecl CurGD
CurGD - The GlobalDecl for the current function being compiled.
Definition: CodeGenFunction.h:345
CharUnits.h
clang::CodeGen::CodeGenFunction::EmitDeleteCall
void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr, QualType DeleteTy, llvm::Value *NumElements=nullptr, CharUnits CookieSize=CharUnits())
Definition: CGExprCXX.cpp:1774
clang::ASTRecordLayout::getVBaseClassOffset
CharUnits getVBaseClassOffset(const CXXRecordDecl *VBase) const
getVBaseClassOffset - Get the offset, in chars, for the given base class.
Definition: RecordLayout.h:259
clang::CodeGen::CodeGenTypeCache::Int32Ty
llvm::IntegerType * Int32Ty
Definition: CodeGenTypeCache.h:37
EmitBaseInitializer
static void EmitBaseInitializer(CodeGenFunction &CGF, const CXXRecordDecl *ClassDecl, CXXCtorInitializer *BaseInit)
Definition: CGClass.cpp:555
clang::TemplateArgumentList::asArray
ArrayRef< TemplateArgument > asArray() const
Produce this as an array ref.
Definition: DeclTemplate.h:291
clang::CXXConstructorDecl::isDefaultConstructor
bool isDefaultConstructor() const
Whether this constructor is a default constructor (C++ [class.ctor]p5), which can be used to default-...
Definition: DeclCXX.cpp:2634
clang::CodeGen::CodeGenModule::CreateCrossDsoCfiTypeId
llvm::ConstantInt * CreateCrossDsoCfiTypeId(llvm::Metadata *MD)
Generate a cross-DSO type identifier for MD.
Definition: CodeGenModule.cpp:1637
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:1148
clang::CodeGen::CodeGenTypes::getCGRecordLayout
const CGRecordLayout & getCGRecordLayout(const RecordDecl *)
getCGRecordLayout - Return record layout info for the given record decl.
Definition: CodeGenTypes.cpp:908
clang::CodeGen::CGBitFieldInfo
Structure with information about how a bitfield should be accessed.
Definition: CGRecordLayout.h:65
clang::LangAS
LangAS
Defines the address space values used by the address space qualifier of QualType.
Definition: AddressSpaces.h:25
FieldHasTrivialDestructorBody
static bool FieldHasTrivialDestructorBody(ASTContext &Context, const FieldDecl *Field)
Definition: CGClass.cpp:1394
clang::FunctionDecl::isDestroyingOperatorDelete
bool isDestroyingOperatorDelete() const
Determine whether this is a destroying operator delete.
Definition: Decl.cpp:3261
clang::CodeGen::CodeGenTypes::GetFunctionType
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1613
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:4301
clang::CodeGen::CodeGenModule::getDataLayout
const llvm::DataLayout & getDataLayout() const
Definition: CodeGenModule.h:706
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:7310
clang::CodeGen::CGBuilderTy::CreateLaunderInvariantGroup
Address CreateLaunderInvariantGroup(Address Addr)
Definition: CGBuilder.h:361
clang::CodeGen::ApplyDebugLocation
A scoped helper to set the current debug location to the specified location or preferred location of ...
Definition: CGDebugInfo.h:798
clang::ASTRecordLayout
ASTRecordLayout - This class contains layout information for one RecordDecl, which is a struct/union/...
Definition: RecordLayout.h:38
clang::CodeGen::AggValueSlot::isSanitizerChecked
bool isSanitizerChecked() const
Definition: CGValue.h:647
isInitializerOfDynamicClass
static bool isInitializerOfDynamicClass(const CXXCtorInitializer *BaseInit)
Definition: CGClass.cpp:1260
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:254
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:2035
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:171
clang::CodeGen::CodeGenFunction::EHStack
EHScopeStack EHStack
Definition: CodeGenFunction.h:619
ApplyNonVirtualAndVirtualOffset
static Address ApplyNonVirtualAndVirtualOffset(CodeGenFunction &CGF, Address addr, CharUnits nonVirtualOffset, llvm::Value *virtualOffset, const CXXRecordDecl *derivedClass, const CXXRecordDecl *nearestVBase)
Definition: CGClass.cpp:247
P
StringRef P
Definition: ASTMatchersInternal.cpp:563
clang::CodeGen::LValue::isSimple
bool isSimple() const
Definition: CGValue.h:265
clang::CXXConstructorDecl::init_const_iterator
CXXCtorInitializer *const * init_const_iterator
Iterates through the member/base initializer list.
Definition: DeclCXX.h:2509
clang::CodeGen::CodeGenFunction::MakeNaturalAlignAddrLValue
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T)
Definition: CodeGenFunction.cpp:187
clang::CastExpr::path_const_iterator
const typedef CXXBaseSpecifier *const * path_const_iterator
Definition: Expr.h:3542
clang::CodeGen::CodeGenFunction::getTargetHooks
const TargetCodeGenInfo & getTargetHooks() const
Definition: CodeGenFunction.h:2026
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:574
clang::CodeGen::CodeGenFunction::EmitDelegateCallArg
void EmitDelegateCallArg(CallArgList &args, const VarDecl *param, SourceLocation loc)
EmitDelegateCallArg - We are performing a delegate call; that is, the current function is delegating ...
Definition: CGCall.cpp:3765
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:2468
clang::CodeGen::CodeGenFunction::CFITCK_NVMFCall
@ CFITCK_NVMFCall
Definition: CodeGenFunction.h:2300
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2933
clang::CodeGen::CGCXXABI::doStructorsInitializeVPtrs
virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass)=0
Checks if ABI requires to initialize vptrs for given dynamic class.
clang::CodeGen::CodeGenFunction::VPtr::Base
BaseSubobject Base
Definition: CodeGenFunction.h:2267
clang::syntax::NodeRole::Size
@ Size
false
#define false
Definition: stdbool.h:22
clang::CodeGen::CodeGenFunction::ParamValue::forDirect
static ParamValue forDirect(llvm::Value *value)
Definition: CodeGenFunction.h:3149
clang::CodeGen::CodeGenFunction::EmitDelegatingCXXConstructorCall
void EmitDelegatingCXXConstructorCall(const CXXConstructorDecl *Ctor, const FunctionArgList &Args)
Definition: CGClass.cpp:2436
clang::CXXRecordDecl::getNumVBases
unsigned getNumVBases() const
Retrieves the number of virtual base classes of this class.
Definition: DeclCXX.h:611
clang::CodeGen::Address::getPointer
llvm::Value * getPointer() const
Definition: Address.h:93
clang::CodeGen::CodeGenModule::ErrorUnsupported
void ErrorUnsupported(const Stmt *S, const char *Type)
Print out an error that codegen doesn't support the specified stmt yet.
Definition: CodeGenModule.cpp:1059
BaseInitializerUsesThis
static bool BaseInitializerUsesThis(ASTContext &C, const Expr *Init)
Definition: CGClass.cpp:549
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:231
LeastDerivedClassWithSameLayout
static const CXXRecordDecl * LeastDerivedClassWithSameLayout(const CXXRecordDecl *RD)
Definition: CGClass.cpp:2667
clang::CodeGen::CodeGenFunction::InitializeVTablePointer
void InitializeVTablePointer(const VPtr &vptr)
Initialize the vtable pointer of the given subobject.
Definition: CGClass.cpp:2506
clang::CodeGen::CodeGenTypeCache::PtrDiffTy
llvm::IntegerType * PtrDiffTy
Definition: CodeGenTypeCache.h:51
clang::CharUnits::isZero
bool isZero() const
isZero - Test whether the quantity equals zero.
Definition: CharUnits.h:116
clang::CodeGen::CodeGenModule::getCXXABI
CGCXXABI & getCXXABI() const
Definition: CodeGenModule.h:714
clang::ASTContext::getTagDeclType
QualType getTagDeclType(const TagDecl *Decl) const
Return the unique reference to the type for the specified TagDecl (struct/union/class/enum) decl.
Definition: ASTContext.cpp:5813
clang::CodeGen::CodeGenFunction::EmitParmDecl
void EmitParmDecl(const VarDecl &D, ParamValue Arg, unsigned ArgNo)
EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
Definition: CGDecl.cpp:2443
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3898
clang::CodeGen::AggValueSlot::IsNotAliased
@ IsNotAliased
Definition: CGValue.h:550
clang::CodeGen::CGCXXABI::AddedStructorArgCounts
Similar to AddedStructorArgs, but only notes the number of additional arguments.
Definition: CGCXXABI.h:333
clang::CodeGen::CodeGenModule::HasLTOVisibilityPublicStd
bool HasLTOVisibilityPublicStd(const CXXRecordDecl *RD)
Returns whether the given record has public std LTO visibility and therefore may not participate in (...
Definition: CGVTables.cpp:1178
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1876
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:247
clang::CodeGen::CodeGenModule::GetNonVirtualBaseClassOffset
llvm::Constant * GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl, CastExpr::path_const_iterator PathBegin, CastExpr::path_const_iterator PathEnd)
Returns the offset from a derived class to a class.
Definition: CGClass.cpp:197
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:4127
clang::CodeGen::CodeGenFunction::EmitAsanPrologueOrEpilogue
void EmitAsanPrologueOrEpilogue(bool Prologue)
Definition: CGClass.cpp:776
clang::CodeGen::CGBlockInfo::getBlockDecl
const BlockDecl * getBlockDecl() const
Definition: CGBlocks.h:310
clang::CodeGen::CodeGenModule::getVTables
CodeGenVTables & getVTables()
Definition: CodeGenModule.h:723
Value
Value
Definition: UninitializedValues.cpp:102
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:1993
clang::CodeGen::CodeGenFunction::CFITCK_DerivedCast
@ CFITCK_DerivedCast
Definition: CodeGenFunction.h:2297
clang::CodeGen::CodeGenFunction::LexicalScope
Definition: CodeGenFunction.h:931
clang::CXXConstructorDecl::getInheritedConstructor
InheritedConstructor getInheritedConstructor() const
Get the constructor that this inheriting constructor is based on.
Definition: DeclCXX.h:2661
clang::CodeGen::CodeGenFunction::BuildFunctionArgList
QualType BuildFunctionArgList(GlobalDecl GD, FunctionArgList &Args)
Definition: CodeGenFunction.cpp:1279
clang::CodeGen::CGFunctionInfo::usesInAlloca
bool usesInAlloca() const
Return true if this function uses inalloca arguments.
Definition: CGFunctionInfo.h:725
clang::CodeGen::CodeGenFunction::VPtr::VTableClass
const CXXRecordDecl * VTableClass
Definition: CodeGenFunction.h:2270
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:587
clang::CodeGen::CGCallee
All available information about a concrete callee.
Definition: CGCall.h:63
clang::CodeGen::FunctionArgList
FunctionArgList - Type for representing both the decl and type of parameters to a function.
Definition: CGCall.h:356
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:2360
clang::CodeGen::CGFunctionInfo::getReturnInfo
ABIArgInfo & getReturnInfo()
Definition: CGFunctionInfo.h:711
clang::QualType::DestructionKind
DestructionKind
Definition: Type.h:1210
clang::CodeGen::CodeGenFunction::getTypes
CodeGenTypes & getTypes() const
Definition: CodeGenFunction.h:1981
clang::CXXConstructorDecl::init_begin
init_iterator init_begin()
Retrieve an iterator to the first initializer.
Definition: DeclCXX.h:2520
clang::CodeGen::AggValueSlot
An aggregate value slot.
Definition: CGValue.h:491
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:212
clang::Qualifiers::hasVolatile
bool hasVolatile() const
Definition: Type.h:269
clang::Dtor_Comdat
@ Dtor_Comdat
The COMDAT used for dtors.
Definition: ABI.h:37
clang::CodeGen::CodeGenFunction::EmitForwardingCallToLambda
void EmitForwardingCallToLambda(const CXXMethodDecl *LambdaCallOperator, CallArgList &CallArgs)
Definition: CGClass.cpp:2890
clang::CodeGen::CodeGenFunction::EmitCXXConstructorCall
void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, AggValueSlot ThisAVS, const CXXConstructExpr *E)
Definition: CGClass.cpp:2079
clang::TemplateArgumentList
A template argument list.
Definition: DeclTemplate.h:237
TargetBuiltins.h
clang::CodeGen::NormalAndEHCleanup
@ NormalAndEHCleanup
Definition: EHScopeStack.h:86
clang::NamedDecl::getQualifiedNameAsString
std::string getQualifiedNameAsString() const
Definition: Decl.cpp:1605
clang::CodeGen::CodeGenFunction::LoadCXXVTT
llvm::Value * LoadCXXVTT()
LoadCXXVTT - Load the VTT parameter to base constructors/destructors have virtual bases.
Definition: CodeGenFunction.h:2814
clang::CodeGen::CodeGenVTables::getSubVTTIndex
uint64_t getSubVTTIndex(const CXXRecordDecl *RD, BaseSubobject Base)
getSubVTTIndex - Return the index of the sub-VTT for the base class of the given record decl.
Definition: CGVTT.cpp:128
clang::TargetCXXABI::hasConstructorVariants
bool hasConstructorVariants() const
Does this ABI have different entrypoints for complete-object and base-subobject constructors?
Definition: TargetCXXABI.h:196
clang::CodeGen::Address::getElementType
llvm::Type * getElementType() const
Return the type of the values stored in this address.
Definition: Address.h:104
clang::CodeGen::CodeGenFunction::MakeAddrLValue
LValue MakeAddrLValue(Address Addr, QualType T, AlignmentSource Source=AlignmentSource::Type)
Definition: CodeGenFunction.h:2492
clang::CXXRecordDecl::hasTrivialDestructor
bool hasTrivialDestructor() const
Determine whether this class has a trivial destructor (C++ [class.dtor]p3)
Definition: DeclCXX.h:1321
clang::CodeGen::CodeGenModule::DecorateInstructionWithTBAA
void DecorateInstructionWithTBAA(llvm::Instruction *Inst, TBAAAccessInfo TBAAInfo)
DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
Definition: CodeGenModule.cpp:1040
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:165
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,...
Definition: CGExprScalar.cpp:4869
clang::CXXRecordDecl::getDestructor
CXXDestructorDecl * getDestructor() const
Returns the destructor decl for this class.
Definition: DeclCXX.cpp:1888
clang::CodeGen::CodeGenFunction::EmitVTablePtrCheckForCast
void EmitVTablePtrCheckForCast(QualType T, Address Derived, bool MayBeNull, CFITypeCheckKind TCK, SourceLocation Loc)
Derived is the presumed address of an object of type T after a cast.
Definition: CGClass.cpp:2724
clang::LangOptions
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:78
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2844
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:546
clang::CodeGen::AggValueSlot::Overlap_t
Overlap_t
Definition: CGValue.h:553
CGCXXABI.h
clang::CodeGen::CodeGenFunction::FnRetTy
QualType FnRetTy
Definition: CodeGenFunction.h:324
clang::CXXThisExpr
Represents the this expression in C++.
Definition: ExprCXX.h:1142
clang::CodeGen::CGCXXABI::EmitMemberDataPointerAddress
virtual llvm::Value * EmitMemberDataPointerAddress(CodeGenFunction &CGF, const Expr *E, Address Base, llvm::Value *MemPtr, const MemberPointerType *MPT)
Calculate an l-value from an object and a data member pointer.
Definition: CGCXXABI.cpp:58
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:261
clang::interp::This
bool This(InterpState &S, CodePtr OpPC)
Definition: Interp.h:829
clang::DeclaratorContext::TypeName
@ TypeName
clang::CodeGen::TEK_Scalar
@ TEK_Scalar
Definition: CodeGenFunction.h:107
CGBlocks.h
clang::CodeGen::CodeGenFunction::CFITCK_NVCall
@ CFITCK_NVCall
Definition: CodeGenFunction.h:2296
clang::CodeGen::CodeGenFunction::CurFn
llvm::Function * CurFn
Definition: CodeGenFunction.h:325
clang::CodeGen::CleanupKind
CleanupKind
Definition: EHScopeStack.h:77
clang::UnaryOperator::getSubExpr
Expr * getSubExpr() const
Definition: Expr.h:2210
clang
Definition: CalledOnceCheck.h:17
clang::IndirectFieldDecl
Represents a field injected from an anonymous union/struct into the parent scope.
Definition: Decl.h:3109
clang::CXXCtorInitializer::getMember
FieldDecl * getMember() const
If this is a member initializer, returns the declaration of the non-static data member being initiali...
Definition: DeclCXX.h:2329
clang::CodeGen::CGCXXABI::EmitCtorCompleteObjectHandler
virtual llvm::BasicBlock * EmitCtorCompleteObjectHandler(CodeGenFunction &CGF, const CXXRecordDecl *RD)
Definition: CGCXXABI.cpp:299
clang::CodeGen::RValue::get
static RValue get(llvm::Value *V)
Definition: CGValue.h:89
clang::CodeGen::CodeGenFunction::EmitCallArgs
void EmitCallArgs(CallArgList &Args, PrototypeWrapper Prototype, llvm::iterator_range< CallExpr::const_arg_iterator > ArgRange, AbstractCallee AC=AbstractCallee(), unsigned ParamsToSkip=0, EvaluationOrder Order=EvaluationOrder::Default)
EmitCallArgs - Emit call arguments for a function.
Definition: CGCall.cpp:4146
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2451
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:2056
clang::CodeGenOptions::SanitizeTrap
SanitizerSet SanitizeTrap
Set of sanitizer checks that trap rather than diagnose.
Definition: CodeGenOptions.h:353
clang::CodeGen::CodeGenFunction::EvaluationOrder::ForceLeftToRight
@ ForceLeftToRight
! Language semantics require left-to-right evaluation.
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:69
clang::UnaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:2205
clang::CodeGen::AggValueSlot::getAddress
Address getAddress() const
Definition: CGValue.h:627
clang::CodeGen::CGCXXABI::canSpeculativelyEmitVTable
virtual bool canSpeculativelyEmitVTable(const CXXRecordDecl *RD) const =0
Determine whether it's possible to emit a vtable for RD, even though we do not know that the vtable h...
clang::CodeGen::CodeGenFunction::RunCleanupsScope::ForceCleanup
void ForceCleanup(std::initializer_list< llvm::Value ** > ValuesToReload={})
Force the emission of cleanups now, instead of waiting until this object is destroyed.
Definition: CodeGenFunction.h:917
clang::CodeGen::CodeGenTypeCache::IntPtrTy
llvm::IntegerType * IntPtrTy
Definition: CodeGenTypeCache.h:49
clang::CodeGen::CodeGenModule::getNaturalTypeAlignment
CharUnits getNaturalTypeAlignment(QualType T, LValueBaseInfo *BaseInfo=nullptr, TBAAAccessInfo *TBAAInfo=nullptr, bool forPointeeType=false)
Definition: CodeGenModule.cpp:6735
clang::CXXRecordDecl::bases_begin
base_class_iterator bases_begin()
Definition: DeclCXX.h:603
clang::CodeGen::CodeGenFunction::ParamValue
Definition: CodeGenFunction.h:3142
clang::transformer::callArgs
RangeSelector callArgs(std::string ID)
Definition: RangeSelector.cpp:298
clang::CXXBaseSpecifier
Represents a base class of a C++ class.
Definition: DeclCXX.h:146
clang::CXXRecordDecl::hasDefinition
bool hasDefinition() const
Definition: DeclCXX.h:549
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3822
clang::CodeGen::CGCXXABI::EmitInstanceFunctionProlog
virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF)=0
Emit the ABI-specific prolog for the function.
clang::CodeGen::RValue::getScalarVal
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:61
clang::ConstEvaluatedExprVisitor
ConstEvaluatedExprVisitor - This class visits 'const Expr *'s.
Definition: EvaluatedExprVisitor.h:137
clang::CodeGen::CodeGenFunction::EnterCXXTryStmt
void EnterCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock=false)
Definition: CGException.cpp:617
clang::ASTRecordLayout::getFieldCount
unsigned getFieldCount() const
getFieldCount - Get the number of fields in the layout.
Definition: RecordLayout.h:196
clang::CXXRecordDecl::isAbstract
bool isAbstract() const
Determine whether this class has a pure virtual function.
Definition: DeclCXX.h:1176
clang::CodeGen::AggValueSlot::getQualifiers
Qualifiers getQualifiers() const
Definition: CGValue.h:602
clang::GlobalDecl::getCtorType
CXXCtorType getCtorType() const
Definition: GlobalDecl.h:105
clang::Dtor_Deleting
@ Dtor_Deleting
Deleting dtor.
Definition: ABI.h:34
clang::CodeGen::CodeGenFunction::getVTablePointers
VPtrsVector getVTablePointers(const CXXRecordDecl *VTableClass)
Definition: CGClass.cpp:2560
clang::CodeGen::CodeGenFunction::GetAddressOfBaseClass
Address GetAddressOfBaseClass(Address Value, const CXXRecordDecl *Derived, CastExpr::path_const_iterator PathBegin, CastExpr::path_const_iterator PathEnd, bool NullCheckValue, SourceLocation Loc)
GetAddressOfBaseClass - This function will add the necessary delta to the load of 'this' and returns ...
Definition: CGClass.cpp:293
clang::CodeGen::CodeGenFunction::EmitInlinedInheritingCXXConstructorCall
void EmitInlinedInheritingCXXConstructorCall(const CXXConstructorDecl *Ctor, CXXCtorType CtorType, bool ForVirtualBase, bool Delegating, CallArgList &Args)
Emit a call to an inheriting constructor (that is, one that invokes a constructor inherited from a ba...
Definition: CGClass.cpp:2278
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Prefix
unsigned Prefix
Definition: CGCXXABI.h:334
clang::FunctionDecl::isVariadic
bool isVariadic() const
Whether this function is variadic.
Definition: Decl.cpp:2980
clang::CodeGen::RValue::isScalar
bool isScalar() const
Definition: CGValue.h:54
clang::ASTRecordLayout::getAlignment
CharUnits getAlignment() const
getAlignment - Get the record alignment in characters.
Definition: RecordLayout.h:182
clang::CodeGen::CodeGenFunction::Destroyer
void Destroyer(CodeGenFunction &CGF, Address addr, QualType ty)
Definition: CodeGenFunction.h:2034
clang::CompoundStmt::body
body_range body()
Definition: Stmt.h:1436
clang::SanitizerSet::set
void set(SanitizerMask K, bool Value)
Enable or disable a certain (single) sanitizer.
Definition: Sanitizers.h:164
clang::CodeGen::CGCXXABI::GetVirtualBaseClassOffset
virtual llvm::Value * GetVirtualBaseClassOffset(CodeGenFunction &CGF, Address This, const CXXRecordDecl *ClassDecl, const CXXRecordDecl *BaseClassDecl)=0
clang::CodeGen::CodeGenFunction::VPtr
Struct with all information about dynamic [sub]class needed to set vptr.
Definition: CodeGenFunction.h:2266
clang::ASTContext::getASTRecordLayout
const ASTRecordLayout & getASTRecordLayout(const RecordDecl *D) const
Get or compute information about the layout of the specified record (struct/union/class) D,...
Definition: RecordLayoutBuilder.cpp:3268
clang::NoSanitizeList::containsType
bool containsType(SanitizerMask Mask, StringRef MangledTypeName, StringRef Category=StringRef()) const
Definition: NoSanitizeList.cpp:35
clang::GlobalDecl::getDecl
const Decl * getDecl() const
Definition: GlobalDecl.h:103
clang::BaseSubobject::getBaseOffset
CharUnits getBaseOffset() const
getBaseOffset - Returns the base class offset.
Definition: BaseSubobject.h:46
clang::ImplicitCastExpr
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3619
clang::CodeGen::CodeGenFunction::EmitCtorPrologue
void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type, FunctionArgList &Args)
EmitCtorPrologue - This routine generates necessary code to initialize base classes and non-static da...
Definition: CGClass.cpp:1269
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:3164
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:1305
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6500
clang::CXXRecordDecl::isDynamicClass
bool isDynamicClass() const
Definition: DeclCXX.h:562
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4657
clang::ASTContext::getPointerType
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
Definition: ASTContext.cpp:3260
clang::CodeGen::TargetCodeGenInfo::performAddrSpaceCast
virtual llvm::Value * performAddrSpaceCast(CodeGen::CodeGenFunction &CGF, llvm::Value *V, LangAS SrcAddr, LangAS DestAddr, llvm::Type *DestTy, bool IsNonNull=false) const
Perform address space cast of an expression of pointer type.
Definition: TargetInfo.cpp:501
clang::CXXRecordDecl::isPolymorphic
bool isPolymorphic() const
Whether this class is polymorphic (C++ [class.virtual]), which means that the class contains or inher...
Definition: DeclCXX.h:1169
clang::TargetCXXABI::areArgsDestroyedLeftToRightInCallee
bool areArgsDestroyedLeftToRightInCallee() const
Are arguments to a call destroyed left to right in the callee? This is a fundamental language change,...
Definition: TargetCXXABI.h:190
clang::CharUnits
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
clang::ASTContext::getTypeInfoInChars
TypeInfoChars getTypeInfoInChars(const Type *T) const
Definition: ASTContext.cpp:1874
clang::FunctionDecl::isFunctionTemplateSpecialization
bool isFunctionTemplateSpecialization() const
Determine whether this function is a function template specialization.
Definition: Decl.h:2709
clang::CXXConstructExpr::getArg
Expr * getArg(unsigned Arg)
Return the specified argument.
Definition: ExprCXX.h:1611
clang::CodeGen::CodeGenFunction::FieldConstructionScope
A scope within which we are constructing the fields of an object which might use a CXXDefaultInitExpr...
Definition: CodeGenFunction.h:1600
clang::CodeGen::CodeGenFunction::GetAddressOfDerivedClass
Address GetAddressOfDerivedClass(Address Value, const CXXRecordDecl *Derived, CastExpr::path_const_iterator PathBegin, CastExpr::path_const_iterator PathEnd, bool NullCheckValue)
Definition: CGClass.cpp:401
clang::CodeGen::CodeGenFunction::ParamValue::forIndirect
static ParamValue forIndirect(Address addr)
Definition: CodeGenFunction.h:3152
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:219
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:685
clang::CodeGen::CallArg
Definition: CGCall.h:217
clang::FunctionDecl::getBuiltinID
unsigned getBuiltinID(bool ConsiderWrapperFunctions=false) const
Returns a value indicating whether this function corresponds to a builtin function.
Definition: Decl.cpp:3382
clang::CodeGen::CodeGenFunction::InlinedInheritingConstructorScope
Definition: CodeGenFunction.h:1660
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::CodeGen::CodeGenFunction::LoadCXXThisAddress
Address LoadCXXThisAddress()
Definition: CGClass.cpp:128
clang::IndirectFieldDecl::chain
ArrayRef< NamedDecl * > chain() const
Definition: Decl.h:3131
clang::CodeGen::CodeGenModule::getAddrOfCXXStructor
llvm::Constant * getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo=nullptr, llvm::FunctionType *FnType=nullptr, bool DontDefer=false, ForDefinition_t IsForDefinition=NotForDefinition)
Return the address of the constructor/destructor of the given type.
Definition: CodeGenModule.h:1026
clang::CXXConstructExpr::isListInitialization
bool isListInitialization() const
Whether this constructor call was written as list-initialization.
Definition: ExprCXX.h:1551
clang::FunctionDecl::getDescribedFunctionTemplate
FunctionTemplateDecl * getDescribedFunctionTemplate() const
Retrieves the function template that is described by this function declaration.
Definition: Decl.cpp:3773
clang::CodeGen::CodeGenFunction::IsConstructorDelegationValid
static bool IsConstructorDelegationValid(const CXXConstructorDecl *Ctor)
Checks whether the given constructor is a valid subject for the complete-to-base constructor delegati...
Definition: CGClass.cpp:728
clang::CodeGen::ReturnValueSlot::isNull
bool isNull() const
Definition: CGCall.h:376
clang::CodeGen::CodeGenFunction::EmitBranchThroughCleanup
void EmitBranchThroughCleanup(JumpDest Dest)
EmitBranchThroughCleanup - Emit a branch from the current insert block through the normal cleanup han...
Definition: CGCleanup.cpp:1087
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:1222
clang::CodeGen::CodeGenTypeCache::Int8Ty
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
Definition: CodeGenTypeCache.h:37
clang::CXXCtorInitializer
Represents a C++ base or member initializer.
Definition: DeclCXX.h:2192
clang::CodeGen::CodeGenModule::getIntrinsic
llvm::Function * getIntrinsic(unsigned IID, ArrayRef< llvm::Type * > Tys=None)
Definition: CodeGenModule.cpp:5299
clang::CodeGen::AggValueSlot::IsNotSanitizerChecked
@ IsNotSanitizerChecked
Definition: CGValue.h:555
clang::FunctionDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2503
clang::CodeGen::CodeGenModule::DecorateInstructionWithInvariantGroup
void DecorateInstructionWithInvariantGroup(llvm::Instruction *I, const CXXRecordDecl *RD)
Adds !invariant.barrier !tag to instruction.
Definition: CodeGenModule.cpp:1046
clang::CodeGen::CodeGenFunction::EnterDtorCleanups
void EnterDtorCleanups(const CXXDestructorDecl *Dtor, CXXDtorType Type)
EnterDtorCleanups - Enter the cleanups necessary to complete the given phase of destruction for a des...
Definition: CGClass.cpp:1804
clang::CodeGen::CallArgList
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:262
clang::CodeGen::CodeGenTypes::arrangeCXXConstructorCall
const CGFunctionInfo & arrangeCXXConstructorCall(const CallArgList &Args, const CXXConstructorDecl *D, CXXCtorType CtorKind, unsigned ExtraPrefixArgs, unsigned ExtraSuffixArgs, bool PassProtoArgs=true)
Arrange a call to a C++ method, passing the given arguments.
Definition: CGCall.cpp:403
clang::CodeGen::CodeGenFunction::CFITCK_UnrelatedCast
@ CFITCK_UnrelatedCast
Definition: CodeGenFunction.h:2298
clang::CodeGen::CodeGenFunction::EmitAggregateCopyCtor
void EmitAggregateCopyCtor(LValue Dest, LValue Src, AggValueSlot::Overlap_t MayOverlap)
Definition: CodeGenFunction.h:2703
clang::CodeGen::CodeGenFunction::CFITCK_VMFCall
@ CFITCK_VMFCall
Definition: CodeGenFunction.h:2301
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1872
clang::CodeGen::AggValueSlot::IsNotZeroed
@ IsNotZeroed
Definition: CGValue.h:552
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2801
clang::ASTContext::getNoSanitizeList
const NoSanitizeList & getNoSanitizeList() const
Definition: ASTContext.h:796
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:544
StmtCXX.h
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:4526
clang::CodeGen::CodeGenFunction::InitializeVTablePointers
void InitializeVTablePointers(const CXXRecordDecl *ClassDecl)
Definition: CGClass.cpp:2628
clang::CXXConstructExpr
Represents a call to a C++ constructor.
Definition: ExprCXX.h:1460
clang::CodeGen::CodeGenFunction::ReturnBlock
JumpDest ReturnBlock
ReturnBlock - Unified return block.
Definition: CodeGenFunction.h:352
clang::CodeGen::CodeGenModule::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenModule.h:715
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:786
clang::CharUnits::isPositive
bool isPositive() const
isPositive - Test whether the quantity is greater than zero.
Definition: CharUnits.h:122
clang::CXXMemberCallExpr
Represents a call to a member function that may be written either with member call syntax (e....
Definition: ExprCXX.h:177
clang::CharUnits::getQuantity
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
clang::CodeGen::CodeGenFunction::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenFunction.h:1995
clang::SanitizerMask
Definition: Sanitizers.h:30
clang::CXXMethodDecl::isVirtual
bool isVirtual() const
Definition: DeclCXX.h:2012
clang::CodeGen::ApplyInlineDebugLocation
A scoped helper to set the current debug location to an inlined location.
Definition: CGDebugInfo.h:853
clang::CodeGen::CodeGenFunction::EmitCXXMemberDataPointerAddress
Address EmitCXXMemberDataPointerAddress(const Expr *E, Address base, llvm::Value *memberPtr, const MemberPointerType *memberPtrType, LValueBaseInfo *BaseInfo=nullptr, TBAAAccessInfo *TBAAInfo=nullptr)
Emit the address of a field using a member data pointer.
Definition: CGClass.cpp:148
RecordLayout.h
clang::CodeGen::CodeGenFunction::CurFuncDecl
const Decl * CurFuncDecl
CurFuncDecl - Holds the Decl for the current outermost non-closure context.
Definition: CodeGenFunction.h:320
clang::CodeGen::RValue::getAggregateAddress
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:73
clang::CodeGen::CodeGenFunction::EmitCheckTypeDescriptor
llvm::Constant * EmitCheckTypeDescriptor(QualType T)
Emit a description of a type in a format suitable for passing to a runtime sanitizer handler.
Definition: CGExpr.cpp:3063
clang::CodeGen::CodeGenFunction::ExitCXXTryStmt
void ExitCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock=false)
Definition: CGException.cpp:1186
clang::CodeGen::CGBuilderTy::CreateLoad
llvm::LoadInst * CreateLoad(Address Addr, const llvm::Twine &Name="")
Definition: CGBuilder.h:69
clang::CodeGen::LValue::getBitFieldAddress
Address getBitFieldAddress() const
Definition: CGValue.h:390
clang::CXXMethodDecl::getParent
const CXXRecordDecl * getParent() const
Return the parent of this method declaration, which is the class in which this method is defined.
Definition: DeclCXX.h:2083
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1968
clang::CodeGen::CodeGenFunction::ReturnValue
Address ReturnValue
ReturnValue - The temporary alloca to hold the return value.
Definition: CodeGenFunction.h:356
clang::CodeGen::CodeGenFunction::CFITCK_ICall
@ CFITCK_ICall
Definition: CodeGenFunction.h:2299
clang::CodeGen::CGCXXABI::getSrcArgforCopyCtor
virtual size_t getSrcArgforCopyCtor(const CXXConstructorDecl *, FunctionArgList &Args) const =0
clang::CodeGen::AggValueSlot::DoesNotOverlap
@ DoesNotOverlap
Definition: CGValue.h:553
clang::CXXDestructorDecl::getOperatorDeleteThisArg
Expr * getOperatorDeleteThisArg() const
Definition: DeclCXX.h:2725