clang  13.0.0git
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  assert(isa<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  auto RD = cast<CXXMethodDecl>(CurFuncDecl)->getParent();
138  CXXThisAlignment = CGM.getClassPointerAlignment(RD);
139  }
140 
141  return Address(LoadCXXThis(), 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, memberAlign);
166 }
167 
169  const CXXRecordDecl *DerivedClass, CastExpr::path_const_iterator Start,
172 
173  const ASTContext &Context = getContext();
174  const CXXRecordDecl *RD = DerivedClass;
175 
176  for (CastExpr::path_const_iterator I = Start; I != End; ++I) {
177  const CXXBaseSpecifier *Base = *I;
178  assert(!Base->isVirtual() && "Should not see virtual bases here!");
179 
180  // Get the layout.
181  const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD);
182 
183  const auto *BaseDecl =
184  cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
185 
186  // Add the offset.
187  Offset += Layout.getBaseClassOffset(BaseDecl);
188 
189  RD = BaseDecl;
190  }
191 
192  return Offset;
193 }
194 
195 llvm::Constant *
199  assert(PathBegin != PathEnd && "Base path should not be empty!");
200 
201  CharUnits Offset =
202  computeNonVirtualBaseClassOffset(ClassDecl, PathBegin, PathEnd);
203  if (Offset.isZero())
204  return nullptr;
205 
206  llvm::Type *PtrDiffTy =
207  Types.ConvertType(getContext().getPointerDiffType());
208 
209  return llvm::ConstantInt::get(PtrDiffTy, Offset.getQuantity());
210 }
211 
212 /// Gets the address of a direct base class within a complete object.
213 /// This should only be used for (1) non-virtual bases or (2) virtual bases
214 /// when the type is known to be complete (e.g. in complete destructors).
215 ///
216 /// The object pointed to by 'This' is assumed to be non-null.
217 Address
219  const CXXRecordDecl *Derived,
220  const CXXRecordDecl *Base,
221  bool BaseIsVirtual) {
222  // 'this' must be a pointer (in some address space) to Derived.
223  assert(This.getElementType() == ConvertType(Derived));
224 
225  // Compute the offset of the virtual base.
227  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(Derived);
228  if (BaseIsVirtual)
229  Offset = Layout.getVBaseClassOffset(Base);
230  else
231  Offset = Layout.getBaseClassOffset(Base);
232 
233  // Shift and cast down to the base type.
234  // TODO: for complete types, this should be possible with a GEP.
235  Address V = This;
236  if (!Offset.isZero()) {
239  }
241 
242  return V;
243 }
244 
245 static Address
247  CharUnits nonVirtualOffset,
248  llvm::Value *virtualOffset,
249  const CXXRecordDecl *derivedClass,
250  const CXXRecordDecl *nearestVBase) {
251  // Assert that we have something to do.
252  assert(!nonVirtualOffset.isZero() || virtualOffset != nullptr);
253 
254  // Compute the offset from the static and dynamic components.
255  llvm::Value *baseOffset;
256  if (!nonVirtualOffset.isZero()) {
257  llvm::Type *OffsetType =
258  (CGF.CGM.getTarget().getCXXABI().isItaniumFamily() &&
260  ? CGF.Int32Ty
261  : CGF.PtrDiffTy;
262  baseOffset =
263  llvm::ConstantInt::get(OffsetType, nonVirtualOffset.getQuantity());
264  if (virtualOffset) {
265  baseOffset = CGF.Builder.CreateAdd(virtualOffset, baseOffset);
266  }
267  } else {
268  baseOffset = virtualOffset;
269  }
270 
271  // Apply the base offset.
272  llvm::Value *ptr = addr.getPointer();
273  unsigned AddrSpace = ptr->getType()->getPointerAddressSpace();
274  ptr = CGF.Builder.CreateBitCast(ptr, CGF.Int8Ty->getPointerTo(AddrSpace));
275  ptr = CGF.Builder.CreateInBoundsGEP(CGF.Int8Ty, ptr, baseOffset, "add.ptr");
276 
277  // If we have a virtual component, the alignment of the result will
278  // be relative only to the known alignment of that vbase.
279  CharUnits alignment;
280  if (virtualOffset) {
281  assert(nearestVBase && "virtual offset without vbase?");
282  alignment = CGF.CGM.getVBaseAlignment(addr.getAlignment(),
283  derivedClass, nearestVBase);
284  } else {
285  alignment = addr.getAlignment();
286  }
287  alignment = alignment.alignmentAtOffset(nonVirtualOffset);
288 
289  return Address(ptr, alignment);
290 }
291 
293  Address Value, const CXXRecordDecl *Derived,
295  CastExpr::path_const_iterator PathEnd, bool NullCheckValue,
296  SourceLocation Loc) {
297  assert(PathBegin != PathEnd && "Base path should not be empty!");
298 
299  CastExpr::path_const_iterator Start = PathBegin;
300  const CXXRecordDecl *VBase = nullptr;
301 
302  // Sema has done some convenient canonicalization here: if the
303  // access path involved any virtual steps, the conversion path will
304  // *start* with a step down to the correct virtual base subobject,
305  // and hence will not require any further steps.
306  if ((*Start)->isVirtual()) {
307  VBase = cast<CXXRecordDecl>(
308  (*Start)->getType()->castAs<RecordType>()->getDecl());
309  ++Start;
310  }
311 
312  // Compute the static offset of the ultimate destination within its
313  // allocating subobject (the virtual base, if there is one, or else
314  // the "complete" object that we see).
316  VBase ? VBase : Derived, Start, PathEnd);
317 
318  // If there's a virtual step, we can sometimes "devirtualize" it.
319  // For now, that's limited to when the derived type is final.
320  // TODO: "devirtualize" this for accesses to known-complete objects.
321  if (VBase && Derived->hasAttr<FinalAttr>()) {
322  const ASTRecordLayout &layout = getContext().getASTRecordLayout(Derived);
323  CharUnits vBaseOffset = layout.getVBaseClassOffset(VBase);
324  NonVirtualOffset += vBaseOffset;
325  VBase = nullptr; // we no longer have a virtual step
326  }
327 
328  // Get the base pointer type.
329  llvm::Type *BasePtrTy =
330  ConvertType((PathEnd[-1])->getType())
331  ->getPointerTo(Value.getType()->getPointerAddressSpace());
332 
333  QualType DerivedTy = getContext().getRecordType(Derived);
334  CharUnits DerivedAlign = CGM.getClassPointerAlignment(Derived);
335 
336  // If the static offset is zero and we don't have a virtual step,
337  // just do a bitcast; null checks are unnecessary.
338  if (NonVirtualOffset.isZero() && !VBase) {
339  if (sanitizePerformTypeCheck()) {
340  SanitizerSet SkippedChecks;
341  SkippedChecks.set(SanitizerKind::Null, !NullCheckValue);
342  EmitTypeCheck(TCK_Upcast, Loc, Value.getPointer(),
343  DerivedTy, DerivedAlign, SkippedChecks);
344  }
345  return Builder.CreateBitCast(Value, BasePtrTy);
346  }
347 
348  llvm::BasicBlock *origBB = nullptr;
349  llvm::BasicBlock *endBB = nullptr;
350 
351  // Skip over the offset (and the vtable load) if we're supposed to
352  // null-check the pointer.
353  if (NullCheckValue) {
354  origBB = Builder.GetInsertBlock();
355  llvm::BasicBlock *notNullBB = createBasicBlock("cast.notnull");
356  endBB = createBasicBlock("cast.end");
357 
358  llvm::Value *isNull = Builder.CreateIsNull(Value.getPointer());
359  Builder.CreateCondBr(isNull, endBB, notNullBB);
360  EmitBlock(notNullBB);
361  }
362 
363  if (sanitizePerformTypeCheck()) {
364  SanitizerSet SkippedChecks;
365  SkippedChecks.set(SanitizerKind::Null, true);
367  Value.getPointer(), DerivedTy, DerivedAlign, SkippedChecks);
368  }
369 
370  // Compute the virtual offset.
371  llvm::Value *VirtualOffset = nullptr;
372  if (VBase) {
373  VirtualOffset =
374  CGM.getCXXABI().GetVirtualBaseClassOffset(*this, Value, Derived, VBase);
375  }
376 
377  // Apply both offsets.
378  Value = ApplyNonVirtualAndVirtualOffset(*this, Value, NonVirtualOffset,
379  VirtualOffset, Derived, VBase);
380 
381  // Cast to the destination type.
382  Value = Builder.CreateBitCast(Value, BasePtrTy);
383 
384  // Build a phi if we needed a null check.
385  if (NullCheckValue) {
386  llvm::BasicBlock *notNullBB = Builder.GetInsertBlock();
387  Builder.CreateBr(endBB);
388  EmitBlock(endBB);
389 
390  llvm::PHINode *PHI = Builder.CreatePHI(BasePtrTy, 2, "cast.result");
391  PHI->addIncoming(Value.getPointer(), notNullBB);
392  PHI->addIncoming(llvm::Constant::getNullValue(BasePtrTy), origBB);
393  Value = Address(PHI, Value.getAlignment());
394  }
395 
396  return Value;
397 }
398 
399 Address
401  const CXXRecordDecl *Derived,
404  bool NullCheckValue) {
405  assert(PathBegin != PathEnd && "Base path should not be empty!");
406 
407  QualType DerivedTy =
408  getContext().getCanonicalType(getContext().getTagDeclType(Derived));
409  unsigned AddrSpace =
410  BaseAddr.getPointer()->getType()->getPointerAddressSpace();
411  llvm::Type *DerivedPtrTy = ConvertType(DerivedTy)->getPointerTo(AddrSpace);
412 
413  llvm::Value *NonVirtualOffset =
414  CGM.GetNonVirtualBaseClassOffset(Derived, PathBegin, PathEnd);
415 
416  if (!NonVirtualOffset) {
417  // No offset, we can just cast back.
418  return Builder.CreateBitCast(BaseAddr, DerivedPtrTy);
419  }
420 
421  llvm::BasicBlock *CastNull = nullptr;
422  llvm::BasicBlock *CastNotNull = nullptr;
423  llvm::BasicBlock *CastEnd = nullptr;
424 
425  if (NullCheckValue) {
426  CastNull = createBasicBlock("cast.null");
427  CastNotNull = createBasicBlock("cast.notnull");
428  CastEnd = createBasicBlock("cast.end");
429 
430  llvm::Value *IsNull = Builder.CreateIsNull(BaseAddr.getPointer());
431  Builder.CreateCondBr(IsNull, CastNull, CastNotNull);
432  EmitBlock(CastNotNull);
433  }
434 
435  // Apply the offset.
437  Value = Builder.CreateInBoundsGEP(
438  Int8Ty, Value, Builder.CreateNeg(NonVirtualOffset), "sub.ptr");
439 
440  // Just cast.
441  Value = Builder.CreateBitCast(Value, DerivedPtrTy);
442 
443  // Produce a PHI if we had a null-check.
444  if (NullCheckValue) {
445  Builder.CreateBr(CastEnd);
446  EmitBlock(CastNull);
447  Builder.CreateBr(CastEnd);
448  EmitBlock(CastEnd);
449 
450  llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2);
451  PHI->addIncoming(Value, CastNotNull);
452  PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull);
453  Value = PHI;
454  }
455 
456  return Address(Value, CGM.getClassPointerAlignment(Derived));
457 }
458 
460  bool ForVirtualBase,
461  bool Delegating) {
462  if (!CGM.getCXXABI().NeedsVTTParameter(GD)) {
463  // This constructor/destructor does not need a VTT parameter.
464  return nullptr;
465  }
466 
467  const CXXRecordDecl *RD = cast<CXXMethodDecl>(CurCodeDecl)->getParent();
468  const CXXRecordDecl *Base = cast<CXXMethodDecl>(GD.getDecl())->getParent();
469 
470  llvm::Value *VTT;
471 
472  uint64_t SubVTTIndex;
473 
474  if (Delegating) {
475  // If this is a delegating constructor call, just load the VTT.
476  return LoadCXXVTT();
477  } else if (RD == Base) {
478  // If the record matches the base, this is the complete ctor/dtor
479  // variant calling the base variant in a class with virtual bases.
480  assert(!CGM.getCXXABI().NeedsVTTParameter(CurGD) &&
481  "doing no-op VTT offset in base dtor/ctor?");
482  assert(!ForVirtualBase && "Can't have same class as virtual base!");
483  SubVTTIndex = 0;
484  } else {
485  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
486  CharUnits BaseOffset = ForVirtualBase ?
487  Layout.getVBaseClassOffset(Base) :
488  Layout.getBaseClassOffset(Base);
489 
490  SubVTTIndex =
491  CGM.getVTables().getSubVTTIndex(RD, BaseSubobject(Base, BaseOffset));
492  assert(SubVTTIndex != 0 && "Sub-VTT index must be greater than zero!");
493  }
494 
496  // A VTT parameter was passed to the constructor, use it.
497  VTT = LoadCXXVTT();
498  VTT = Builder.CreateConstInBoundsGEP1_64(VTT, SubVTTIndex);
499  } else {
500  // We're the complete constructor, so get the VTT by name.
501  VTT = CGM.getVTables().GetAddrOfVTT(RD);
502  VTT = Builder.CreateConstInBoundsGEP2_64(VTT, 0, SubVTTIndex);
503  }
504 
505  return VTT;
506 }
507 
508 namespace {
509  /// Call the destructor for a direct base class.
510  struct CallBaseDtor final : EHScopeStack::Cleanup {
511  const CXXRecordDecl *BaseClass;
512  bool BaseIsVirtual;
513  CallBaseDtor(const CXXRecordDecl *Base, bool BaseIsVirtual)
514  : BaseClass(Base), BaseIsVirtual(BaseIsVirtual) {}
515 
516  void Emit(CodeGenFunction &CGF, Flags flags) override {
517  const CXXRecordDecl *DerivedClass =
518  cast<CXXMethodDecl>(CGF.CurCodeDecl)->getParent();
519 
520  const CXXDestructorDecl *D = BaseClass->getDestructor();
521  // We are already inside a destructor, so presumably the object being
522  // destroyed should have the expected type.
523  QualType ThisTy = D->getThisObjectType();
524  Address Addr =
526  DerivedClass, BaseClass,
527  BaseIsVirtual);
528  CGF.EmitCXXDestructorCall(D, Dtor_Base, BaseIsVirtual,
529  /*Delegating=*/false, Addr, ThisTy);
530  }
531  };
532 
533  /// A visitor which checks whether an initializer uses 'this' in a
534  /// way which requires the vtable to be properly set.
535  struct DynamicThisUseChecker : ConstEvaluatedExprVisitor<DynamicThisUseChecker> {
537 
538  bool UsesThis;
539 
540  DynamicThisUseChecker(const ASTContext &C) : super(C), UsesThis(false) {}
541 
542  // Black-list all explicit and implicit references to 'this'.
543  //
544  // Do we need to worry about external references to 'this' derived
545  // from arbitrary code? If so, then anything which runs arbitrary
546  // external code might potentially access the vtable.
547  void VisitCXXThisExpr(const CXXThisExpr *E) { UsesThis = true; }
548  };
549 } // end anonymous namespace
550 
551 static bool BaseInitializerUsesThis(ASTContext &C, const Expr *Init) {
552  DynamicThisUseChecker Checker(C);
553  Checker.Visit(Init);
554  return Checker.UsesThis;
555 }
556 
558  const CXXRecordDecl *ClassDecl,
559  CXXCtorInitializer *BaseInit) {
560  assert(BaseInit->isBaseInitializer() &&
561  "Must have base initializer!");
562 
563  Address ThisPtr = CGF.LoadCXXThisAddress();
564 
565  const Type *BaseType = BaseInit->getBaseClass();
566  const auto *BaseClassDecl =
567  cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
568 
569  bool isBaseVirtual = BaseInit->isBaseVirtual();
570 
571  // If the initializer for the base (other than the constructor
572  // itself) accesses 'this' in any way, we need to initialize the
573  // vtables.
574  if (BaseInitializerUsesThis(CGF.getContext(), BaseInit->getInit()))
575  CGF.InitializeVTablePointers(ClassDecl);
576 
577  // We can pretend to be a complete class because it only matters for
578  // virtual bases, and we only do virtual bases for complete ctors.
579  Address V =
580  CGF.GetAddressOfDirectBaseInCompleteClass(ThisPtr, ClassDecl,
581  BaseClassDecl,
582  isBaseVirtual);
583  AggValueSlot AggSlot =
585  V, Qualifiers(),
589  CGF.getOverlapForBaseInit(ClassDecl, BaseClassDecl, isBaseVirtual));
590 
591  CGF.EmitAggExpr(BaseInit->getInit(), AggSlot);
592 
593  if (CGF.CGM.getLangOpts().Exceptions &&
594  !BaseClassDecl->hasTrivialDestructor())
595  CGF.EHStack.pushCleanup<CallBaseDtor>(EHCleanup, BaseClassDecl,
596  isBaseVirtual);
597 }
598 
600  auto *CD = dyn_cast<CXXConstructorDecl>(D);
601  if (!(CD && CD->isCopyOrMoveConstructor()) &&
603  return false;
604 
605  // We can emit a memcpy for a trivial copy or move constructor/assignment.
606  if (D->isTrivial() && !D->getParent()->mayInsertExtraPadding())
607  return true;
608 
609  // We *must* emit a memcpy for a defaulted union copy or move op.
610  if (D->getParent()->isUnion() && D->isDefaulted())
611  return true;
612 
613  return false;
614 }
615 
617  CXXCtorInitializer *MemberInit,
618  LValue &LHS) {
619  FieldDecl *Field = MemberInit->getAnyMember();
620  if (MemberInit->isIndirectMemberInitializer()) {
621  // If we are initializing an anonymous union field, drill down to the field.
622  IndirectFieldDecl *IndirectField = MemberInit->getIndirectMember();
623  for (const auto *I : IndirectField->chain())
624  LHS = CGF.EmitLValueForFieldInitialization(LHS, cast<FieldDecl>(I));
625  } else {
626  LHS = CGF.EmitLValueForFieldInitialization(LHS, Field);
627  }
628 }
629 
631  const CXXRecordDecl *ClassDecl,
632  CXXCtorInitializer *MemberInit,
633  const CXXConstructorDecl *Constructor,
634  FunctionArgList &Args) {
635  ApplyDebugLocation Loc(CGF, MemberInit->getSourceLocation());
636  assert(MemberInit->isAnyMemberInitializer() &&
637  "Must have member initializer!");
638  assert(MemberInit->getInit() && "Must have initializer!");
639 
640  // non-static data member initializers.
641  FieldDecl *Field = MemberInit->getAnyMember();
642  QualType FieldType = Field->getType();
643 
644  llvm::Value *ThisPtr = CGF.LoadCXXThis();
645  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
646  LValue LHS;
647 
648  // If a base constructor is being emitted, create an LValue that has the
649  // non-virtual alignment.
650  if (CGF.CurGD.getCtorType() == Ctor_Base)
651  LHS = CGF.MakeNaturalAlignPointeeAddrLValue(ThisPtr, RecordTy);
652  else
653  LHS = CGF.MakeNaturalAlignAddrLValue(ThisPtr, RecordTy);
654 
655  EmitLValueForAnyFieldInitialization(CGF, MemberInit, LHS);
656 
657  // Special case: if we are in a copy or move constructor, and we are copying
658  // an array of PODs or classes with trivial copy constructors, ignore the
659  // AST and perform the copy we know is equivalent.
660  // FIXME: This is hacky at best... if we had a bit more explicit information
661  // in the AST, we could generalize it more easily.
662  const ConstantArrayType *Array
663  = CGF.getContext().getAsConstantArrayType(FieldType);
664  if (Array && Constructor->isDefaulted() &&
665  Constructor->isCopyOrMoveConstructor()) {
666  QualType BaseElementTy = CGF.getContext().getBaseElementType(Array);
667  CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(MemberInit->getInit());
668  if (BaseElementTy.isPODType(CGF.getContext()) ||
670  unsigned SrcArgIndex =
671  CGF.CGM.getCXXABI().getSrcArgforCopyCtor(Constructor, Args);
672  llvm::Value *SrcPtr
673  = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(Args[SrcArgIndex]));
674  LValue ThisRHSLV = CGF.MakeNaturalAlignAddrLValue(SrcPtr, RecordTy);
675  LValue Src = CGF.EmitLValueForFieldInitialization(ThisRHSLV, Field);
676 
677  // Copy the aggregate.
678  CGF.EmitAggregateCopy(LHS, Src, FieldType, CGF.getOverlapForFieldInit(Field),
679  LHS.isVolatileQualified());
680  // Ensure that we destroy the objects if an exception is thrown later in
681  // the constructor.
682  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
683  if (CGF.needsEHCleanup(dtorKind))
684  CGF.pushEHDestroy(dtorKind, LHS.getAddress(CGF), FieldType);
685  return;
686  }
687  }
688 
689  CGF.EmitInitializerForField(Field, LHS, MemberInit->getInit());
690 }
691 
693  Expr *Init) {
694  QualType FieldType = Field->getType();
695  switch (getEvaluationKind(FieldType)) {
696  case TEK_Scalar:
697  if (LHS.isSimple()) {
698  EmitExprAsInit(Init, Field, LHS, false);
699  } else {
700  RValue RHS = RValue::get(EmitScalarExpr(Init));
701  EmitStoreThroughLValue(RHS, LHS);
702  }
703  break;
704  case TEK_Complex:
705  EmitComplexExprIntoLValue(Init, LHS, /*isInit*/ true);
706  break;
707  case TEK_Aggregate: {
709  LHS, *this, AggValueSlot::IsDestructed,
712  // Checks are made by the code that calls constructor.
714  EmitAggExpr(Init, Slot);
715  break;
716  }
717  }
718 
719  // Ensure that we destroy this object if an exception is thrown
720  // later in the constructor.
721  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
722  if (needsEHCleanup(dtorKind))
723  pushEHDestroy(dtorKind, LHS.getAddress(*this), FieldType);
724 }
725 
726 /// Checks whether the given constructor is a valid subject for the
727 /// complete-to-base constructor delegation optimization, i.e.
728 /// emitting the complete constructor as a simple call to the base
729 /// constructor.
731  const CXXConstructorDecl *Ctor) {
732 
733  // Currently we disable the optimization for classes with virtual
734  // bases because (1) the addresses of parameter variables need to be
735  // consistent across all initializers but (2) the delegate function
736  // call necessarily creates a second copy of the parameter variable.
737  //
738  // The limiting example (purely theoretical AFAIK):
739  // struct A { A(int &c) { c++; } };
740  // struct B : virtual A {
741  // B(int count) : A(count) { printf("%d\n", count); }
742  // };
743  // ...although even this example could in principle be emitted as a
744  // delegation since the address of the parameter doesn't escape.
745  if (Ctor->getParent()->getNumVBases()) {
746  // TODO: white-list trivial vbase initializers. This case wouldn't
747  // be subject to the restrictions below.
748 
749  // TODO: white-list cases where:
750  // - there are no non-reference parameters to the constructor
751  // - the initializers don't access any non-reference parameters
752  // - the initializers don't take the address of non-reference
753  // parameters
754  // - etc.
755  // If we ever add any of the above cases, remember that:
756  // - function-try-blocks will always exclude this optimization
757  // - we need to perform the constructor prologue and cleanup in
758  // EmitConstructorBody.
759 
760  return false;
761  }
762 
763  // We also disable the optimization for variadic functions because
764  // it's impossible to "re-pass" varargs.
765  if (Ctor->getType()->castAs<FunctionProtoType>()->isVariadic())
766  return false;
767 
768  // FIXME: Decide if we can do a delegation of a delegating constructor.
769  if (Ctor->isDelegatingConstructor())
770  return false;
771 
772  return true;
773 }
774 
775 // Emit code in ctor (Prologue==true) or dtor (Prologue==false)
776 // to poison the extra field paddings inserted under
777 // -fsanitize-address-field-padding=1|2.
779  ASTContext &Context = getContext();
780  const CXXRecordDecl *ClassDecl =
781  Prologue ? cast<CXXConstructorDecl>(CurGD.getDecl())->getParent()
782  : cast<CXXDestructorDecl>(CurGD.getDecl())->getParent();
783  if (!ClassDecl->mayInsertExtraPadding()) return;
784 
785  struct SizeAndOffset {
786  uint64_t Size;
787  uint64_t Offset;
788  };
789 
790  unsigned PtrSize = CGM.getDataLayout().getPointerSizeInBits();
791  const ASTRecordLayout &Info = Context.getASTRecordLayout(ClassDecl);
792 
793  // Populate sizes and offsets of fields.
795  for (unsigned i = 0, e = Info.getFieldCount(); i != e; ++i)
796  SSV[i].Offset =
798 
799  size_t NumFields = 0;
800  for (const auto *Field : ClassDecl->fields()) {
801  const FieldDecl *D = Field;
802  auto FieldInfo = Context.getTypeInfoInChars(D->getType());
803  CharUnits FieldSize = FieldInfo.Width;
804  assert(NumFields < SSV.size());
805  SSV[NumFields].Size = D->isBitField() ? 0 : FieldSize.getQuantity();
806  NumFields++;
807  }
808  assert(NumFields == SSV.size());
809  if (SSV.size() <= 1) return;
810 
811  // We will insert calls to __asan_* run-time functions.
812  // LLVM AddressSanitizer pass may decide to inline them later.
813  llvm::Type *Args[2] = {IntPtrTy, IntPtrTy};
814  llvm::FunctionType *FTy =
815  llvm::FunctionType::get(CGM.VoidTy, Args, false);
816  llvm::FunctionCallee F = CGM.CreateRuntimeFunction(
817  FTy, Prologue ? "__asan_poison_intra_object_redzone"
818  : "__asan_unpoison_intra_object_redzone");
819 
820  llvm::Value *ThisPtr = LoadCXXThis();
821  ThisPtr = Builder.CreatePtrToInt(ThisPtr, IntPtrTy);
822  uint64_t TypeSize = Info.getNonVirtualSize().getQuantity();
823  // For each field check if it has sufficient padding,
824  // if so (un)poison it with a call.
825  for (size_t i = 0; i < SSV.size(); i++) {
826  uint64_t AsanAlignment = 8;
827  uint64_t NextField = i == SSV.size() - 1 ? TypeSize : SSV[i + 1].Offset;
828  uint64_t PoisonSize = NextField - SSV[i].Offset - SSV[i].Size;
829  uint64_t EndOffset = SSV[i].Offset + SSV[i].Size;
830  if (PoisonSize < AsanAlignment || !SSV[i].Size ||
831  (NextField % AsanAlignment) != 0)
832  continue;
833  Builder.CreateCall(
834  F, {Builder.CreateAdd(ThisPtr, Builder.getIntN(PtrSize, EndOffset)),
835  Builder.getIntN(PtrSize, PoisonSize)});
836  }
837 }
838 
839 /// EmitConstructorBody - Emits the body of the current constructor.
842  const CXXConstructorDecl *Ctor = cast<CXXConstructorDecl>(CurGD.getDecl());
843  CXXCtorType CtorType = CurGD.getCtorType();
844 
846  CtorType == Ctor_Complete) &&
847  "can only generate complete ctor for this ABI");
848 
849  // Before we go any further, try the complete->base constructor
850  // delegation optimization.
851  if (CtorType == Ctor_Complete && IsConstructorDelegationValid(Ctor) &&
853  EmitDelegateCXXConstructorCall(Ctor, Ctor_Base, Args, Ctor->getEndLoc());
854  return;
855  }
856 
857  const FunctionDecl *Definition = nullptr;
858  Stmt *Body = Ctor->getBody(Definition);
859  assert(Definition == Ctor && "emitting wrong constructor body");
860 
861  // Enter the function-try-block before the constructor prologue if
862  // applicable.
863  bool IsTryBody = (Body && isa<CXXTryStmt>(Body));
864  if (IsTryBody)
865  EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
866 
868 
869  RunCleanupsScope RunCleanups(*this);
870 
871  // TODO: in restricted cases, we can emit the vbase initializers of
872  // a complete ctor and then delegate to the base ctor.
873 
874  // Emit the constructor prologue, i.e. the base and member
875  // initializers.
876  EmitCtorPrologue(Ctor, CtorType, Args);
877 
878  // Emit the body of the statement.
879  if (IsTryBody)
880  EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
881  else if (Body)
882  EmitStmt(Body);
883 
884  // Emit any cleanup blocks associated with the member or base
885  // initializers, which includes (along the exceptional path) the
886  // destructors for those members and bases that were fully
887  // constructed.
888  RunCleanups.ForceCleanup();
889 
890  if (IsTryBody)
891  ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
892 }
893 
894 namespace {
895  /// RAII object to indicate that codegen is copying the value representation
896  /// instead of the object representation. Useful when copying a struct or
897  /// class which has uninitialized members and we're only performing
898  /// lvalue-to-rvalue conversion on the object but not its members.
899  class CopyingValueRepresentation {
900  public:
901  explicit CopyingValueRepresentation(CodeGenFunction &CGF)
902  : CGF(CGF), OldSanOpts(CGF.SanOpts) {
903  CGF.SanOpts.set(SanitizerKind::Bool, false);
904  CGF.SanOpts.set(SanitizerKind::Enum, false);
905  }
906  ~CopyingValueRepresentation() {
907  CGF.SanOpts = OldSanOpts;
908  }
909  private:
910  CodeGenFunction &CGF;
911  SanitizerSet OldSanOpts;
912  };
913 } // end anonymous namespace
914 
915 namespace {
916  class FieldMemcpyizer {
917  public:
918  FieldMemcpyizer(CodeGenFunction &CGF, const CXXRecordDecl *ClassDecl,
919  const VarDecl *SrcRec)
920  : CGF(CGF), ClassDecl(ClassDecl), SrcRec(SrcRec),
921  RecLayout(CGF.getContext().getASTRecordLayout(ClassDecl)),
922  FirstField(nullptr), LastField(nullptr), FirstFieldOffset(0),
923  LastFieldOffset(0), LastAddedFieldIndex(0) {}
924 
925  bool isMemcpyableField(FieldDecl *F) const {
926  // Never memcpy fields when we are adding poisoned paddings.
927  if (CGF.getContext().getLangOpts().SanitizeAddressFieldPadding)
928  return false;
929  Qualifiers Qual = F->getType().getQualifiers();
930  if (Qual.hasVolatile() || Qual.hasObjCLifetime())
931  return false;
932  return true;
933  }
934 
935  void addMemcpyableField(FieldDecl *F) {
936  if (F->isZeroSize(CGF.getContext()))
937  return;
938  if (!FirstField)
939  addInitialField(F);
940  else
941  addNextField(F);
942  }
943 
944  CharUnits getMemcpySize(uint64_t FirstByteOffset) const {
945  ASTContext &Ctx = CGF.getContext();
946  unsigned LastFieldSize =
947  LastField->isBitField()
948  ? LastField->getBitWidthValue(Ctx)
949  : Ctx.toBits(
950  Ctx.getTypeInfoDataSizeInChars(LastField->getType()).Width);
951  uint64_t MemcpySizeBits = LastFieldOffset + LastFieldSize -
952  FirstByteOffset + Ctx.getCharWidth() - 1;
953  CharUnits MemcpySize = Ctx.toCharUnitsFromBits(MemcpySizeBits);
954  return MemcpySize;
955  }
956 
957  void emitMemcpy() {
958  // Give the subclass a chance to bail out if it feels the memcpy isn't
959  // worth it (e.g. Hasn't aggregated enough data).
960  if (!FirstField) {
961  return;
962  }
963 
964  uint64_t FirstByteOffset;
965  if (FirstField->isBitField()) {
966  const CGRecordLayout &RL =
967  CGF.getTypes().getCGRecordLayout(FirstField->getParent());
968  const CGBitFieldInfo &BFInfo = RL.getBitFieldInfo(FirstField);
969  // FirstFieldOffset is not appropriate for bitfields,
970  // we need to use the storage offset instead.
971  FirstByteOffset = CGF.getContext().toBits(BFInfo.StorageOffset);
972  } else {
973  FirstByteOffset = FirstFieldOffset;
974  }
975 
976  CharUnits MemcpySize = getMemcpySize(FirstByteOffset);
977  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
978  Address ThisPtr = CGF.LoadCXXThisAddress();
979  LValue DestLV = CGF.MakeAddrLValue(ThisPtr, RecordTy);
980  LValue Dest = CGF.EmitLValueForFieldInitialization(DestLV, FirstField);
981  llvm::Value *SrcPtr = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(SrcRec));
982  LValue SrcLV = CGF.MakeNaturalAlignAddrLValue(SrcPtr, RecordTy);
983  LValue Src = CGF.EmitLValueForFieldInitialization(SrcLV, FirstField);
984 
985  emitMemcpyIR(
986  Dest.isBitField() ? Dest.getBitFieldAddress() : Dest.getAddress(CGF),
987  Src.isBitField() ? Src.getBitFieldAddress() : Src.getAddress(CGF),
988  MemcpySize);
989  reset();
990  }
991 
992  void reset() {
993  FirstField = nullptr;
994  }
995 
996  protected:
997  CodeGenFunction &CGF;
998  const CXXRecordDecl *ClassDecl;
999 
1000  private:
1001  void emitMemcpyIR(Address DestPtr, Address SrcPtr, CharUnits Size) {
1002  llvm::PointerType *DPT = DestPtr.getType();
1003  llvm::Type *DBP =
1004  llvm::Type::getInt8PtrTy(CGF.getLLVMContext(), DPT->getAddressSpace());
1005  DestPtr = CGF.Builder.CreateBitCast(DestPtr, DBP);
1006 
1007  llvm::PointerType *SPT = SrcPtr.getType();
1008  llvm::Type *SBP =
1009  llvm::Type::getInt8PtrTy(CGF.getLLVMContext(), SPT->getAddressSpace());
1010  SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, SBP);
1011 
1012  CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, Size.getQuantity());
1013  }
1014 
1015  void addInitialField(FieldDecl *F) {
1016  FirstField = F;
1017  LastField = F;
1018  FirstFieldOffset = RecLayout.getFieldOffset(F->getFieldIndex());
1019  LastFieldOffset = FirstFieldOffset;
1020  LastAddedFieldIndex = F->getFieldIndex();
1021  }
1022 
1023  void addNextField(FieldDecl *F) {
1024  // For the most part, the following invariant will hold:
1025  // F->getFieldIndex() == LastAddedFieldIndex + 1
1026  // The one exception is that Sema won't add a copy-initializer for an
1027  // unnamed bitfield, which will show up here as a gap in the sequence.
1028  assert(F->getFieldIndex() >= LastAddedFieldIndex + 1 &&
1029  "Cannot aggregate fields out of order.");
1030  LastAddedFieldIndex = F->getFieldIndex();
1031 
1032  // The 'first' and 'last' fields are chosen by offset, rather than field
1033  // index. This allows the code to support bitfields, as well as regular
1034  // fields.
1035  uint64_t FOffset = RecLayout.getFieldOffset(F->getFieldIndex());
1036  if (FOffset < FirstFieldOffset) {
1037  FirstField = F;
1038  FirstFieldOffset = FOffset;
1039  } else if (FOffset >= LastFieldOffset) {
1040  LastField = F;
1041  LastFieldOffset = FOffset;
1042  }
1043  }
1044 
1045  const VarDecl *SrcRec;
1046  const ASTRecordLayout &RecLayout;
1047  FieldDecl *FirstField;
1048  FieldDecl *LastField;
1049  uint64_t FirstFieldOffset, LastFieldOffset;
1050  unsigned LastAddedFieldIndex;
1051  };
1052 
1053  class ConstructorMemcpyizer : public FieldMemcpyizer {
1054  private:
1055  /// Get source argument for copy constructor. Returns null if not a copy
1056  /// constructor.
1057  static const VarDecl *getTrivialCopySource(CodeGenFunction &CGF,
1058  const CXXConstructorDecl *CD,
1059  FunctionArgList &Args) {
1060  if (CD->isCopyOrMoveConstructor() && CD->isDefaulted())
1061  return Args[CGF.CGM.getCXXABI().getSrcArgforCopyCtor(CD, Args)];
1062  return nullptr;
1063  }
1064 
1065  // Returns true if a CXXCtorInitializer represents a member initialization
1066  // that can be rolled into a memcpy.
1067  bool isMemberInitMemcpyable(CXXCtorInitializer *MemberInit) const {
1068  if (!MemcpyableCtor)
1069  return false;
1070  FieldDecl *Field = MemberInit->getMember();
1071  assert(Field && "No field for member init.");
1072  QualType FieldType = Field->getType();
1073  CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(MemberInit->getInit());
1074 
1075  // Bail out on non-memcpyable, not-trivially-copyable members.
1076  if (!(CE && isMemcpyEquivalentSpecialMember(CE->getConstructor())) &&
1077  !(FieldType.isTriviallyCopyableType(CGF.getContext()) ||
1078  FieldType->isReferenceType()))
1079  return false;
1080 
1081  // Bail out on volatile fields.
1082  if (!isMemcpyableField(Field))
1083  return false;
1084 
1085  // Otherwise we're good.
1086  return true;
1087  }
1088 
1089  public:
1090  ConstructorMemcpyizer(CodeGenFunction &CGF, const CXXConstructorDecl *CD,
1091  FunctionArgList &Args)
1092  : FieldMemcpyizer(CGF, CD->getParent(), getTrivialCopySource(CGF, CD, Args)),
1093  ConstructorDecl(CD),
1094  MemcpyableCtor(CD->isDefaulted() &&
1095  CD->isCopyOrMoveConstructor() &&
1096  CGF.getLangOpts().getGC() == LangOptions::NonGC),
1097  Args(Args) { }
1098 
1099  void addMemberInitializer(CXXCtorInitializer *MemberInit) {
1100  if (isMemberInitMemcpyable(MemberInit)) {
1101  AggregatedInits.push_back(MemberInit);
1102  addMemcpyableField(MemberInit->getMember());
1103  } else {
1104  emitAggregatedInits();
1105  EmitMemberInitializer(CGF, ConstructorDecl->getParent(), MemberInit,
1106  ConstructorDecl, Args);
1107  }
1108  }
1109 
1110  void emitAggregatedInits() {
1111  if (AggregatedInits.size() <= 1) {
1112  // This memcpy is too small to be worthwhile. Fall back on default
1113  // codegen.
1114  if (!AggregatedInits.empty()) {
1115  CopyingValueRepresentation CVR(CGF);
1116  EmitMemberInitializer(CGF, ConstructorDecl->getParent(),
1117  AggregatedInits[0], ConstructorDecl, Args);
1118  AggregatedInits.clear();
1119  }
1120  reset();
1121  return;
1122  }
1123 
1124  pushEHDestructors();
1125  emitMemcpy();
1126  AggregatedInits.clear();
1127  }
1128 
1129  void pushEHDestructors() {
1130  Address ThisPtr = CGF.LoadCXXThisAddress();
1131  QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
1132  LValue LHS = CGF.MakeAddrLValue(ThisPtr, RecordTy);
1133 
1134  for (unsigned i = 0; i < AggregatedInits.size(); ++i) {
1135  CXXCtorInitializer *MemberInit = AggregatedInits[i];
1136  QualType FieldType = MemberInit->getAnyMember()->getType();
1137  QualType::DestructionKind dtorKind = FieldType.isDestructedType();
1138  if (!CGF.needsEHCleanup(dtorKind))
1139  continue;
1140  LValue FieldLHS = LHS;
1141  EmitLValueForAnyFieldInitialization(CGF, MemberInit, FieldLHS);
1142  CGF.pushEHDestroy(dtorKind, FieldLHS.getAddress(CGF), FieldType);
1143  }
1144  }
1145 
1146  void finish() {
1147  emitAggregatedInits();
1148  }
1149 
1150  private:
1151  const CXXConstructorDecl *ConstructorDecl;
1152  bool MemcpyableCtor;
1153  FunctionArgList &Args;
1154  SmallVector<CXXCtorInitializer*, 16> AggregatedInits;
1155  };
1156 
1157  class AssignmentMemcpyizer : public FieldMemcpyizer {
1158  private:
1159  // Returns the memcpyable field copied by the given statement, if one
1160  // exists. Otherwise returns null.
1161  FieldDecl *getMemcpyableField(Stmt *S) {
1162  if (!AssignmentsMemcpyable)
1163  return nullptr;
1164  if (BinaryOperator *BO = dyn_cast<BinaryOperator>(S)) {
1165  // Recognise trivial assignments.
1166  if (BO->getOpcode() != BO_Assign)
1167  return nullptr;
1168  MemberExpr *ME = dyn_cast<MemberExpr>(BO->getLHS());
1169  if (!ME)
1170  return nullptr;
1171  FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl());
1172  if (!Field || !isMemcpyableField(Field))
1173  return nullptr;
1174  Stmt *RHS = BO->getRHS();
1175  if (ImplicitCastExpr *EC = dyn_cast<ImplicitCastExpr>(RHS))
1176  RHS = EC->getSubExpr();
1177  if (!RHS)
1178  return nullptr;
1179  if (MemberExpr *ME2 = dyn_cast<MemberExpr>(RHS)) {
1180  if (ME2->getMemberDecl() == Field)
1181  return Field;
1182  }
1183  return nullptr;
1184  } else if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(S)) {
1185  CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(MCE->getCalleeDecl());
1186  if (!(MD && isMemcpyEquivalentSpecialMember(MD)))
1187  return nullptr;
1188  MemberExpr *IOA = dyn_cast<MemberExpr>(MCE->getImplicitObjectArgument());
1189  if (!IOA)
1190  return nullptr;
1191  FieldDecl *Field = dyn_cast<FieldDecl>(IOA->getMemberDecl());
1192  if (!Field || !isMemcpyableField(Field))
1193  return nullptr;
1194  MemberExpr *Arg0 = dyn_cast<MemberExpr>(MCE->getArg(0));
1195  if (!Arg0 || Field != dyn_cast<FieldDecl>(Arg0->getMemberDecl()))
1196  return nullptr;
1197  return Field;
1198  } else if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
1199  FunctionDecl *FD = dyn_cast<FunctionDecl>(CE->getCalleeDecl());
1200  if (!FD || FD->getBuiltinID() != Builtin::BI__builtin_memcpy)
1201  return nullptr;
1202  Expr *DstPtr = CE->getArg(0);
1203  if (ImplicitCastExpr *DC = dyn_cast<ImplicitCastExpr>(DstPtr))
1204  DstPtr = DC->getSubExpr();
1205  UnaryOperator *DUO = dyn_cast<UnaryOperator>(DstPtr);
1206  if (!DUO || DUO->getOpcode() != UO_AddrOf)
1207  return nullptr;
1208  MemberExpr *ME = dyn_cast<MemberExpr>(DUO->getSubExpr());
1209  if (!ME)
1210  return nullptr;
1211  FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl());
1212  if (!Field || !isMemcpyableField(Field))
1213  return nullptr;
1214  Expr *SrcPtr = CE->getArg(1);
1215  if (ImplicitCastExpr *SC = dyn_cast<ImplicitCastExpr>(SrcPtr))
1216  SrcPtr = SC->getSubExpr();
1217  UnaryOperator *SUO = dyn_cast<UnaryOperator>(SrcPtr);
1218  if (!SUO || SUO->getOpcode() != UO_AddrOf)
1219  return nullptr;
1220  MemberExpr *ME2 = dyn_cast<MemberExpr>(SUO->getSubExpr());
1221  if (!ME2 || Field != dyn_cast<FieldDecl>(ME2->getMemberDecl()))
1222  return nullptr;
1223  return Field;
1224  }
1225 
1226  return nullptr;
1227  }
1228 
1229  bool AssignmentsMemcpyable;
1230  SmallVector<Stmt*, 16> AggregatedStmts;
1231 
1232  public:
1233  AssignmentMemcpyizer(CodeGenFunction &CGF, const CXXMethodDecl *AD,
1234  FunctionArgList &Args)
1235  : FieldMemcpyizer(CGF, AD->getParent(), Args[Args.size() - 1]),
1236  AssignmentsMemcpyable(CGF.getLangOpts().getGC() == LangOptions::NonGC) {
1237  assert(Args.size() == 2);
1238  }
1239 
1240  void emitAssignment(Stmt *S) {
1241  FieldDecl *F = getMemcpyableField(S);
1242  if (F) {
1243  addMemcpyableField(F);
1244  AggregatedStmts.push_back(S);
1245  } else {
1246  emitAggregatedStmts();
1247  CGF.EmitStmt(S);
1248  }
1249  }
1250 
1251  void emitAggregatedStmts() {
1252  if (AggregatedStmts.size() <= 1) {
1253  if (!AggregatedStmts.empty()) {
1254  CopyingValueRepresentation CVR(CGF);
1255  CGF.EmitStmt(AggregatedStmts[0]);
1256  }
1257  reset();
1258  }
1259 
1260  emitMemcpy();
1261  AggregatedStmts.clear();
1262  }
1263 
1264  void finish() {
1265  emitAggregatedStmts();
1266  }
1267  };
1268 } // end anonymous namespace
1269 
1270 static bool isInitializerOfDynamicClass(const CXXCtorInitializer *BaseInit) {
1271  const Type *BaseType = BaseInit->getBaseClass();
1272  const auto *BaseClassDecl =
1273  cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
1274  return BaseClassDecl->isDynamicClass();
1275 }
1276 
1277 /// EmitCtorPrologue - This routine generates necessary code to initialize
1278 /// base classes and non-static data members belonging to this constructor.
1280  CXXCtorType CtorType,
1281  FunctionArgList &Args) {
1282  if (CD->isDelegatingConstructor())
1283  return EmitDelegatingCXXConstructorCall(CD, Args);
1284 
1285  const CXXRecordDecl *ClassDecl = CD->getParent();
1286 
1288  E = CD->init_end();
1289 
1290  // Virtual base initializers first, if any. They aren't needed if:
1291  // - This is a base ctor variant
1292  // - There are no vbases
1293  // - The class is abstract, so a complete object of it cannot be constructed
1294  //
1295  // The check for an abstract class is necessary because sema may not have
1296  // marked virtual base destructors referenced.
1297  bool ConstructVBases = CtorType != Ctor_Base &&
1298  ClassDecl->getNumVBases() != 0 &&
1299  !ClassDecl->isAbstract();
1300 
1301  // In the Microsoft C++ ABI, there are no constructor variants. Instead, the
1302  // constructor of a class with virtual bases takes an additional parameter to
1303  // conditionally construct the virtual bases. Emit that check here.
1304  llvm::BasicBlock *BaseCtorContinueBB = nullptr;
1305  if (ConstructVBases &&
1307  BaseCtorContinueBB =
1308  CGM.getCXXABI().EmitCtorCompleteObjectHandler(*this, ClassDecl);
1309  assert(BaseCtorContinueBB);
1310  }
1311 
1312  llvm::Value *const OldThis = CXXThisValue;
1313  for (; B != E && (*B)->isBaseInitializer() && (*B)->isBaseVirtual(); B++) {
1314  if (!ConstructVBases)
1315  continue;
1316  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1317  CGM.getCodeGenOpts().OptimizationLevel > 0 &&
1319  CXXThisValue = Builder.CreateLaunderInvariantGroup(LoadCXXThis());
1320  EmitBaseInitializer(*this, ClassDecl, *B);
1321  }
1322 
1323  if (BaseCtorContinueBB) {
1324  // Complete object handler should continue to the remaining initializers.
1325  Builder.CreateBr(BaseCtorContinueBB);
1326  EmitBlock(BaseCtorContinueBB);
1327  }
1328 
1329  // Then, non-virtual base initializers.
1330  for (; B != E && (*B)->isBaseInitializer(); B++) {
1331  assert(!(*B)->isBaseVirtual());
1332 
1333  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1334  CGM.getCodeGenOpts().OptimizationLevel > 0 &&
1336  CXXThisValue = Builder.CreateLaunderInvariantGroup(LoadCXXThis());
1337  EmitBaseInitializer(*this, ClassDecl, *B);
1338  }
1339 
1340  CXXThisValue = OldThis;
1341 
1342  InitializeVTablePointers(ClassDecl);
1343 
1344  // And finally, initialize class members.
1346  ConstructorMemcpyizer CM(*this, CD, Args);
1347  for (; B != E; B++) {
1348  CXXCtorInitializer *Member = (*B);
1349  assert(!Member->isBaseInitializer());
1350  assert(Member->isAnyMemberInitializer() &&
1351  "Delegating initializer on non-delegating constructor");
1352  CM.addMemberInitializer(Member);
1353  }
1354  CM.finish();
1355 }
1356 
1357 static bool
1358 FieldHasTrivialDestructorBody(ASTContext &Context, const FieldDecl *Field);
1359 
1360 static bool
1362  const CXXRecordDecl *BaseClassDecl,
1363  const CXXRecordDecl *MostDerivedClassDecl)
1364 {
1365  // If the destructor is trivial we don't have to check anything else.
1366  if (BaseClassDecl->hasTrivialDestructor())
1367  return true;
1368 
1369  if (!BaseClassDecl->getDestructor()->hasTrivialBody())
1370  return false;
1371 
1372  // Check fields.
1373  for (const auto *Field : BaseClassDecl->fields())
1374  if (!FieldHasTrivialDestructorBody(Context, Field))
1375  return false;
1376 
1377  // Check non-virtual bases.
1378  for (const auto &I : BaseClassDecl->bases()) {
1379  if (I.isVirtual())
1380  continue;
1381 
1382  const CXXRecordDecl *NonVirtualBase =
1383  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
1384  if (!HasTrivialDestructorBody(Context, NonVirtualBase,
1385  MostDerivedClassDecl))
1386  return false;
1387  }
1388 
1389  if (BaseClassDecl == MostDerivedClassDecl) {
1390  // Check virtual bases.
1391  for (const auto &I : BaseClassDecl->vbases()) {
1392  const CXXRecordDecl *VirtualBase =
1393  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
1394  if (!HasTrivialDestructorBody(Context, VirtualBase,
1395  MostDerivedClassDecl))
1396  return false;
1397  }
1398  }
1399 
1400  return true;
1401 }
1402 
1403 static bool
1405  const FieldDecl *Field)
1406 {
1407  QualType FieldBaseElementType = Context.getBaseElementType(Field->getType());
1408 
1409  const RecordType *RT = FieldBaseElementType->getAs<RecordType>();
1410  if (!RT)
1411  return true;
1412 
1413  CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
1414 
1415  // The destructor for an implicit anonymous union member is never invoked.
1416  if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion())
1417  return false;
1418 
1419  return HasTrivialDestructorBody(Context, FieldClassDecl, FieldClassDecl);
1420 }
1421 
1422 /// CanSkipVTablePointerInitialization - Check whether we need to initialize
1423 /// any vtable pointers before calling this destructor.
1425  const CXXDestructorDecl *Dtor) {
1426  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1427  if (!ClassDecl->isDynamicClass())
1428  return true;
1429 
1430  if (!Dtor->hasTrivialBody())
1431  return false;
1432 
1433  // Check the fields.
1434  for (const auto *Field : ClassDecl->fields())
1435  if (!FieldHasTrivialDestructorBody(CGF.getContext(), Field))
1436  return false;
1437 
1438  return true;
1439 }
1440 
1441 /// EmitDestructorBody - Emits the body of the current destructor.
1443  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CurGD.getDecl());
1444  CXXDtorType DtorType = CurGD.getDtorType();
1445 
1446  // For an abstract class, non-base destructors are never used (and can't
1447  // be emitted in general, because vbase dtors may not have been validated
1448  // by Sema), but the Itanium ABI doesn't make them optional and Clang may
1449  // in fact emit references to them from other compilations, so emit them
1450  // as functions containing a trap instruction.
1451  if (DtorType != Dtor_Base && Dtor->getParent()->isAbstract()) {
1452  llvm::CallInst *TrapCall = EmitTrapCall(llvm::Intrinsic::trap);
1453  TrapCall->setDoesNotReturn();
1454  TrapCall->setDoesNotThrow();
1455  Builder.CreateUnreachable();
1456  Builder.ClearInsertionPoint();
1457  return;
1458  }
1459 
1460  Stmt *Body = Dtor->getBody();
1461  if (Body)
1463 
1464  // The call to operator delete in a deleting destructor happens
1465  // outside of the function-try-block, which means it's always
1466  // possible to delegate the destructor body to the complete
1467  // destructor. Do so.
1468  if (DtorType == Dtor_Deleting) {
1469  RunCleanupsScope DtorEpilogue(*this);
1471  if (HaveInsertPoint()) {
1472  QualType ThisTy = Dtor->getThisObjectType();
1473  EmitCXXDestructorCall(Dtor, Dtor_Complete, /*ForVirtualBase=*/false,
1474  /*Delegating=*/false, LoadCXXThisAddress(), ThisTy);
1475  }
1476  return;
1477  }
1478 
1479  // If the body is a function-try-block, enter the try before
1480  // anything else.
1481  bool isTryBody = (Body && isa<CXXTryStmt>(Body));
1482  if (isTryBody)
1483  EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
1485 
1486  // Enter the epilogue cleanups.
1487  RunCleanupsScope DtorEpilogue(*this);
1488 
1489  // If this is the complete variant, just invoke the base variant;
1490  // the epilogue will destruct the virtual bases. But we can't do
1491  // this optimization if the body is a function-try-block, because
1492  // we'd introduce *two* handler blocks. In the Microsoft ABI, we
1493  // always delegate because we might not have a definition in this TU.
1494  switch (DtorType) {
1495  case Dtor_Comdat: llvm_unreachable("not expecting a COMDAT");
1496  case Dtor_Deleting: llvm_unreachable("already handled deleting case");
1497 
1498  case Dtor_Complete:
1499  assert((Body || getTarget().getCXXABI().isMicrosoft()) &&
1500  "can't emit a dtor without a body for non-Microsoft ABIs");
1501 
1502  // Enter the cleanup scopes for virtual bases.
1504 
1505  if (!isTryBody) {
1506  QualType ThisTy = Dtor->getThisObjectType();
1507  EmitCXXDestructorCall(Dtor, Dtor_Base, /*ForVirtualBase=*/false,
1508  /*Delegating=*/false, LoadCXXThisAddress(), ThisTy);
1509  break;
1510  }
1511 
1512  // Fallthrough: act like we're in the base variant.
1513  LLVM_FALLTHROUGH;
1514 
1515  case Dtor_Base:
1516  assert(Body);
1517 
1518  // Enter the cleanup scopes for fields and non-virtual bases.
1520 
1521  // Initialize the vtable pointers before entering the body.
1522  if (!CanSkipVTablePointerInitialization(*this, Dtor)) {
1523  // Insert the llvm.launder.invariant.group intrinsic before initializing
1524  // the vptrs to cancel any previous assumptions we might have made.
1525  if (CGM.getCodeGenOpts().StrictVTablePointers &&
1526  CGM.getCodeGenOpts().OptimizationLevel > 0)
1527  CXXThisValue = Builder.CreateLaunderInvariantGroup(LoadCXXThis());
1529  }
1530 
1531  if (isTryBody)
1532  EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
1533  else if (Body)
1534  EmitStmt(Body);
1535  else {
1536  assert(Dtor->isImplicit() && "bodyless dtor not implicit");
1537  // nothing to do besides what's in the epilogue
1538  }
1539  // -fapple-kext must inline any call to this dtor into
1540  // the caller's body.
1541  if (getLangOpts().AppleKext)
1542  CurFn->addFnAttr(llvm::Attribute::AlwaysInline);
1543 
1544  break;
1545  }
1546 
1547  // Jump out through the epilogue cleanups.
1548  DtorEpilogue.ForceCleanup();
1549 
1550  // Exit the try if applicable.
1551  if (isTryBody)
1552  ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
1553 }
1554 
1556  const CXXMethodDecl *AssignOp = cast<CXXMethodDecl>(CurGD.getDecl());
1557  const Stmt *RootS = AssignOp->getBody();
1558  assert(isa<CompoundStmt>(RootS) &&
1559  "Body of an implicit assignment operator should be compound stmt.");
1560  const CompoundStmt *RootCS = cast<CompoundStmt>(RootS);
1561 
1562  LexicalScope Scope(*this, RootCS->getSourceRange());
1563 
1564  incrementProfileCounter(RootCS);
1565  AssignmentMemcpyizer AM(*this, AssignOp, Args);
1566  for (auto *I : RootCS->body())
1567  AM.emitAssignment(I);
1568  AM.finish();
1569 }
1570 
1571 namespace {
1572  llvm::Value *LoadThisForDtorDelete(CodeGenFunction &CGF,
1573  const CXXDestructorDecl *DD) {
1574  if (Expr *ThisArg = DD->getOperatorDeleteThisArg())
1575  return CGF.EmitScalarExpr(ThisArg);
1576  return CGF.LoadCXXThis();
1577  }
1578 
1579  /// Call the operator delete associated with the current destructor.
1580  struct CallDtorDelete final : EHScopeStack::Cleanup {
1581  CallDtorDelete() {}
1582 
1583  void Emit(CodeGenFunction &CGF, Flags flags) override {
1584  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CGF.CurCodeDecl);
1585  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1586  CGF.EmitDeleteCall(Dtor->getOperatorDelete(),
1587  LoadThisForDtorDelete(CGF, Dtor),
1588  CGF.getContext().getTagDeclType(ClassDecl));
1589  }
1590  };
1591 
1592  void EmitConditionalDtorDeleteCall(CodeGenFunction &CGF,
1593  llvm::Value *ShouldDeleteCondition,
1594  bool ReturnAfterDelete) {
1595  llvm::BasicBlock *callDeleteBB = CGF.createBasicBlock("dtor.call_delete");
1596  llvm::BasicBlock *continueBB = CGF.createBasicBlock("dtor.continue");
1597  llvm::Value *ShouldCallDelete
1598  = CGF.Builder.CreateIsNull(ShouldDeleteCondition);
1599  CGF.Builder.CreateCondBr(ShouldCallDelete, continueBB, callDeleteBB);
1600 
1601  CGF.EmitBlock(callDeleteBB);
1602  const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CGF.CurCodeDecl);
1603  const CXXRecordDecl *ClassDecl = Dtor->getParent();
1604  CGF.EmitDeleteCall(Dtor->getOperatorDelete(),
1605  LoadThisForDtorDelete(CGF, Dtor),
1606  CGF.getContext().getTagDeclType(ClassDecl));
1607  assert(Dtor->getOperatorDelete()->isDestroyingOperatorDelete() ==
1608  ReturnAfterDelete &&
1609  "unexpected value for ReturnAfterDelete");
1610  if (ReturnAfterDelete)
1612  else
1613  CGF.Builder.CreateBr(continueBB);
1614 
1615  CGF.EmitBlock(continueBB);
1616  }
1617 
1618  struct CallDtorDeleteConditional final : EHScopeStack::Cleanup {
1619  llvm::Value *ShouldDeleteCondition;
1620 
1621  public:
1622  CallDtorDeleteConditional(llvm::Value *ShouldDeleteCondition)
1623  : ShouldDeleteCondition(ShouldDeleteCondition) {
1624  assert(ShouldDeleteCondition != nullptr);
1625  }
1626 
1627  void Emit(CodeGenFunction &CGF, Flags flags) override {
1628  EmitConditionalDtorDeleteCall(CGF, ShouldDeleteCondition,
1629  /*ReturnAfterDelete*/false);
1630  }
1631  };
1632 
1633  class DestroyField final : public EHScopeStack::Cleanup {
1634  const FieldDecl *field;
1635  CodeGenFunction::Destroyer *destroyer;
1636  bool useEHCleanupForArray;
1637 
1638  public:
1639  DestroyField(const FieldDecl *field, CodeGenFunction::Destroyer *destroyer,
1640  bool useEHCleanupForArray)
1641  : field(field), destroyer(destroyer),
1642  useEHCleanupForArray(useEHCleanupForArray) {}
1643 
1644  void Emit(CodeGenFunction &CGF, Flags flags) override {
1645  // Find the address of the field.
1646  Address thisValue = CGF.LoadCXXThisAddress();
1647  QualType RecordTy = CGF.getContext().getTagDeclType(field->getParent());
1648  LValue ThisLV = CGF.MakeAddrLValue(thisValue, RecordTy);
1649  LValue LV = CGF.EmitLValueForField(ThisLV, field);
1650  assert(LV.isSimple());
1651 
1652  CGF.emitDestroy(LV.getAddress(CGF), field->getType(), destroyer,
1653  flags.isForNormalCleanup() && useEHCleanupForArray);
1654  }
1655  };
1656 
1657  static void EmitSanitizerDtorCallback(CodeGenFunction &CGF, llvm::Value *Ptr,
1658  CharUnits::QuantityType PoisonSize) {
1659  CodeGenFunction::SanitizerScope SanScope(&CGF);
1660  // Pass in void pointer and size of region as arguments to runtime
1661  // function
1662  llvm::Value *Args[] = {CGF.Builder.CreateBitCast(Ptr, CGF.VoidPtrTy),
1663  llvm::ConstantInt::get(CGF.SizeTy, PoisonSize)};
1664 
1665  llvm::Type *ArgTypes[] = {CGF.VoidPtrTy, CGF.SizeTy};
1666 
1667  llvm::FunctionType *FnType =
1668  llvm::FunctionType::get(CGF.VoidTy, ArgTypes, false);
1669  llvm::FunctionCallee Fn =
1670  CGF.CGM.CreateRuntimeFunction(FnType, "__sanitizer_dtor_callback");
1671  CGF.EmitNounwindRuntimeCall(Fn, Args);
1672  }
1673 
1674  class SanitizeDtorMembers final : public EHScopeStack::Cleanup {
1675  const CXXDestructorDecl *Dtor;
1676 
1677  public:
1678  SanitizeDtorMembers(const CXXDestructorDecl *Dtor) : Dtor(Dtor) {}
1679 
1680  // Generate function call for handling object poisoning.
1681  // Disables tail call elimination, to prevent the current stack frame
1682  // from disappearing from the stack trace.
1683  void Emit(CodeGenFunction &CGF, Flags flags) override {
1684  const ASTRecordLayout &Layout =
1685  CGF.getContext().getASTRecordLayout(Dtor->getParent());
1686 
1687  // Nothing to poison.
1688  if (Layout.getFieldCount() == 0)
1689  return;
1690 
1691  // Prevent the current stack frame from disappearing from the stack trace.
1692  CGF.CurFn->addFnAttr("disable-tail-calls", "true");
1693 
1694  // Construct pointer to region to begin poisoning, and calculate poison
1695  // size, so that only members declared in this class are poisoned.
1696  ASTContext &Context = CGF.getContext();
1697 
1698  const RecordDecl *Decl = Dtor->getParent();
1699  auto Fields = Decl->fields();
1700  auto IsTrivial = [&](const FieldDecl *F) {
1701  return FieldHasTrivialDestructorBody(Context, F);
1702  };
1703 
1704  auto IsZeroSize = [&](const FieldDecl *F) {
1705  return F->isZeroSize(Context);
1706  };
1707 
1708  // Poison blocks of fields with trivial destructors making sure that block
1709  // begin and end do not point to zero-sized fields. They don't have
1710  // correct offsets so can't be used to calculate poisoning range.
1711  for (auto It = Fields.begin(); It != Fields.end();) {
1712  It = std::find_if(It, Fields.end(), [&](const FieldDecl *F) {
1713  return IsTrivial(F) && !IsZeroSize(F);
1714  });
1715  if (It == Fields.end())
1716  break;
1717  auto Start = It++;
1718  It = std::find_if(It, Fields.end(), [&](const FieldDecl *F) {
1719  return !IsTrivial(F) && !IsZeroSize(F);
1720  });
1721 
1722  PoisonMembers(CGF, (*Start)->getFieldIndex(),
1723  It == Fields.end() ? -1 : (*It)->getFieldIndex());
1724  }
1725  }
1726 
1727  private:
1728  /// \param layoutStartOffset index of the ASTRecordLayout field to
1729  /// start poisoning (inclusive)
1730  /// \param layoutEndOffset index of the ASTRecordLayout field to
1731  /// end poisoning (exclusive)
1732  void PoisonMembers(CodeGenFunction &CGF, unsigned layoutStartOffset,
1733  unsigned layoutEndOffset) {
1734  ASTContext &Context = CGF.getContext();
1735  const ASTRecordLayout &Layout =
1736  Context.getASTRecordLayout(Dtor->getParent());
1737 
1738  // It's a first trivia field so it should be at the begining of char,
1739  // still round up start offset just in case.
1740  CharUnits PoisonStart =
1741  Context.toCharUnitsFromBits(Layout.getFieldOffset(layoutStartOffset) +
1742  Context.getCharWidth() - 1);
1743  llvm::ConstantInt *OffsetSizePtr =
1744  llvm::ConstantInt::get(CGF.SizeTy, PoisonStart.getQuantity());
1745 
1746  llvm::Value *OffsetPtr = CGF.Builder.CreateGEP(
1747  CGF.Builder.CreateBitCast(CGF.LoadCXXThis(), CGF.Int8PtrTy),
1748  OffsetSizePtr);
1749 
1750  CharUnits PoisonEnd;
1751  if (layoutEndOffset >= Layout.getFieldCount()) {
1752  PoisonEnd = Layout.getNonVirtualSize();
1753  } else {
1754  PoisonEnd =
1755  Context.toCharUnitsFromBits(Layout.getFieldOffset(layoutEndOffset));
1756  }
1757  CharUnits PoisonSize = PoisonEnd - PoisonStart;
1758  if (!PoisonSize.isPositive())
1759  return;
1760 
1761  EmitSanitizerDtorCallback(CGF, OffsetPtr, PoisonSize.getQuantity());
1762  }
1763  };
1764 
1765  class SanitizeDtorVTable final : public EHScopeStack::Cleanup {
1766  const CXXDestructorDecl *Dtor;
1767 
1768  public:
1769  SanitizeDtorVTable(const CXXDestructorDecl *Dtor) : Dtor(Dtor) {}
1770 
1771  // Generate function call for handling vtable pointer poisoning.
1772  void Emit(CodeGenFunction &CGF, Flags flags) override {
1773  assert(Dtor->getParent()->isDynamicClass());
1774  (void)Dtor;
1775  ASTContext &Context = CGF.getContext();
1776  // Poison vtable and vtable ptr if they exist for this class.
1777  llvm::Value *VTablePtr = CGF.LoadCXXThis();
1778 
1779  CharUnits::QuantityType PoisonSize =
1781  // Pass in void pointer and size of region as arguments to runtime
1782  // function
1783  EmitSanitizerDtorCallback(CGF, VTablePtr, PoisonSize);
1784  }
1785  };
1786 } // end anonymous namespace
1787 
1788 /// Emit all code that comes at the end of class's
1789 /// destructor. This is to call destructors on members and base classes
1790 /// in reverse order of their construction.
1791 ///
1792 /// For a deleting destructor, this also handles the case where a destroying
1793 /// operator delete completely overrides the definition.
1795  CXXDtorType DtorType) {
1796  assert((!DD->isTrivial() || DD->hasAttr<DLLExportAttr>()) &&
1797  "Should not emit dtor epilogue for non-exported trivial dtor!");
1798 
1799  // The deleting-destructor phase just needs to call the appropriate
1800  // operator delete that Sema picked up.
1801  if (DtorType == Dtor_Deleting) {
1802  assert(DD->getOperatorDelete() &&
1803  "operator delete missing - EnterDtorCleanups");
1804  if (CXXStructorImplicitParamValue) {
1805  // If there is an implicit param to the deleting dtor, it's a boolean
1806  // telling whether this is a deleting destructor.
1808  EmitConditionalDtorDeleteCall(*this, CXXStructorImplicitParamValue,
1809  /*ReturnAfterDelete*/true);
1810  else
1811  EHStack.pushCleanup<CallDtorDeleteConditional>(
1812  NormalAndEHCleanup, CXXStructorImplicitParamValue);
1813  } else {
1815  const CXXRecordDecl *ClassDecl = DD->getParent();
1817  LoadThisForDtorDelete(*this, DD),
1818  getContext().getTagDeclType(ClassDecl));
1820  } else {
1821  EHStack.pushCleanup<CallDtorDelete>(NormalAndEHCleanup);
1822  }
1823  }
1824  return;
1825  }
1826 
1827  const CXXRecordDecl *ClassDecl = DD->getParent();
1828 
1829  // Unions have no bases and do not call field destructors.
1830  if (ClassDecl->isUnion())
1831  return;
1832 
1833  // The complete-destructor phase just destructs all the virtual bases.
1834  if (DtorType == Dtor_Complete) {
1835  // Poison the vtable pointer such that access after the base
1836  // and member destructors are invoked is invalid.
1837  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1838  SanOpts.has(SanitizerKind::Memory) && ClassDecl->getNumVBases() &&
1839  ClassDecl->isPolymorphic())
1840  EHStack.pushCleanup<SanitizeDtorVTable>(NormalAndEHCleanup, DD);
1841 
1842  // We push them in the forward order so that they'll be popped in
1843  // the reverse order.
1844  for (const auto &Base : ClassDecl->vbases()) {
1845  auto *BaseClassDecl =
1846  cast<CXXRecordDecl>(Base.getType()->castAs<RecordType>()->getDecl());
1847 
1848  // Ignore trivial destructors.
1849  if (BaseClassDecl->hasTrivialDestructor())
1850  continue;
1851 
1852  EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup,
1853  BaseClassDecl,
1854  /*BaseIsVirtual*/ true);
1855  }
1856 
1857  return;
1858  }
1859 
1860  assert(DtorType == Dtor_Base);
1861  // Poison the vtable pointer if it has no virtual bases, but inherits
1862  // virtual functions.
1863  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1864  SanOpts.has(SanitizerKind::Memory) && !ClassDecl->getNumVBases() &&
1865  ClassDecl->isPolymorphic())
1866  EHStack.pushCleanup<SanitizeDtorVTable>(NormalAndEHCleanup, DD);
1867 
1868  // Destroy non-virtual bases.
1869  for (const auto &Base : ClassDecl->bases()) {
1870  // Ignore virtual bases.
1871  if (Base.isVirtual())
1872  continue;
1873 
1874  CXXRecordDecl *BaseClassDecl = Base.getType()->getAsCXXRecordDecl();
1875 
1876  // Ignore trivial destructors.
1877  if (BaseClassDecl->hasTrivialDestructor())
1878  continue;
1879 
1880  EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup,
1881  BaseClassDecl,
1882  /*BaseIsVirtual*/ false);
1883  }
1884 
1885  // Poison fields such that access after their destructors are
1886  // invoked, and before the base class destructor runs, is invalid.
1887  if (CGM.getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
1888  SanOpts.has(SanitizerKind::Memory))
1889  EHStack.pushCleanup<SanitizeDtorMembers>(NormalAndEHCleanup, DD);
1890 
1891  // Destroy direct fields.
1892  for (const auto *Field : ClassDecl->fields()) {
1893  QualType type = Field->getType();
1894  QualType::DestructionKind dtorKind = type.isDestructedType();
1895  if (!dtorKind) continue;
1896 
1897  // Anonymous union members do not have their destructors called.
1898  const RecordType *RT = type->getAsUnionType();
1899  if (RT && RT->getDecl()->isAnonymousStructOrUnion()) continue;
1900 
1901  CleanupKind cleanupKind = getCleanupKind(dtorKind);
1902  EHStack.pushCleanup<DestroyField>(cleanupKind, Field,
1903  getDestroyer(dtorKind),
1904  cleanupKind & EHCleanup);
1905  }
1906 }
1907 
1908 /// EmitCXXAggrConstructorCall - Emit a loop to call a particular
1909 /// constructor for each of several members of an array.
1910 ///
1911 /// \param ctor the constructor to call for each element
1912 /// \param arrayType the type of the array to initialize
1913 /// \param arrayBegin an arrayType*
1914 /// \param zeroInitialize true if each element should be
1915 /// zero-initialized before it is constructed
1917  const CXXConstructorDecl *ctor, const ArrayType *arrayType,
1918  Address arrayBegin, const CXXConstructExpr *E, bool NewPointerIsChecked,
1919  bool zeroInitialize) {
1920  QualType elementType;
1921  llvm::Value *numElements =
1922  emitArrayLength(arrayType, elementType, arrayBegin);
1923 
1924  EmitCXXAggrConstructorCall(ctor, numElements, arrayBegin, E,
1925  NewPointerIsChecked, zeroInitialize);
1926 }
1927 
1928 /// EmitCXXAggrConstructorCall - Emit a loop to call a particular
1929 /// constructor for each of several members of an array.
1930 ///
1931 /// \param ctor the constructor to call for each element
1932 /// \param numElements the number of elements in the array;
1933 /// may be zero
1934 /// \param arrayBase a T*, where T is the type constructed by ctor
1935 /// \param zeroInitialize true if each element should be
1936 /// zero-initialized before it is constructed
1938  llvm::Value *numElements,
1939  Address arrayBase,
1940  const CXXConstructExpr *E,
1941  bool NewPointerIsChecked,
1942  bool zeroInitialize) {
1943  // It's legal for numElements to be zero. This can happen both
1944  // dynamically, because x can be zero in 'new A[x]', and statically,
1945  // because of GCC extensions that permit zero-length arrays. There
1946  // are probably legitimate places where we could assume that this
1947  // doesn't happen, but it's not clear that it's worth it.
1948  llvm::BranchInst *zeroCheckBranch = nullptr;
1949 
1950  // Optimize for a constant count.
1951  llvm::ConstantInt *constantCount
1952  = dyn_cast<llvm::ConstantInt>(numElements);
1953  if (constantCount) {
1954  // Just skip out if the constant count is zero.
1955  if (constantCount->isZero()) return;
1956 
1957  // Otherwise, emit the check.
1958  } else {
1959  llvm::BasicBlock *loopBB = createBasicBlock("new.ctorloop");
1960  llvm::Value *iszero = Builder.CreateIsNull(numElements, "isempty");
1961  zeroCheckBranch = Builder.CreateCondBr(iszero, loopBB, loopBB);
1962  EmitBlock(loopBB);
1963  }
1964 
1965  // Find the end of the array.
1966  llvm::Type *elementType = arrayBase.getElementType();
1967  llvm::Value *arrayBegin = arrayBase.getPointer();
1968  llvm::Value *arrayEnd = Builder.CreateInBoundsGEP(
1969  elementType, arrayBegin, numElements, "arrayctor.end");
1970 
1971  // Enter the loop, setting up a phi for the current location to initialize.
1972  llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
1973  llvm::BasicBlock *loopBB = createBasicBlock("arrayctor.loop");
1974  EmitBlock(loopBB);
1975  llvm::PHINode *cur = Builder.CreatePHI(arrayBegin->getType(), 2,
1976  "arrayctor.cur");
1977  cur->addIncoming(arrayBegin, entryBB);
1978 
1979  // Inside the loop body, emit the constructor call on the array element.
1980 
1981  // The alignment of the base, adjusted by the size of a single element,
1982  // provides a conservative estimate of the alignment of every element.
1983  // (This assumes we never start tracking offsetted alignments.)
1984  //
1985  // Note that these are complete objects and so we don't need to
1986  // use the non-virtual size or alignment.
1988  CharUnits eltAlignment =
1989  arrayBase.getAlignment()
1990  .alignmentOfArrayElement(getContext().getTypeSizeInChars(type));
1991  Address curAddr = Address(cur, eltAlignment);
1992 
1993  // Zero initialize the storage, if requested.
1994  if (zeroInitialize)
1995  EmitNullInitialization(curAddr, type);
1996 
1997  // C++ [class.temporary]p4:
1998  // There are two contexts in which temporaries are destroyed at a different
1999  // point than the end of the full-expression. The first context is when a
2000  // default constructor is called to initialize an element of an array.
2001  // If the constructor has one or more default arguments, the destruction of
2002  // every temporary created in a default argument expression is sequenced
2003  // before the construction of the next array element, if any.
2004 
2005  {
2006  RunCleanupsScope Scope(*this);
2007 
2008  // Evaluate the constructor and its arguments in a regular
2009  // partial-destroy cleanup.
2010  if (getLangOpts().Exceptions &&
2011  !ctor->getParent()->hasTrivialDestructor()) {
2012  Destroyer *destroyer = destroyCXXObject;
2013  pushRegularPartialArrayCleanup(arrayBegin, cur, type, eltAlignment,
2014  *destroyer);
2015  }
2016  auto currAVS = AggValueSlot::forAddr(
2017  curAddr, type.getQualifiers(), AggValueSlot::IsDestructed,
2020  NewPointerIsChecked ? AggValueSlot::IsSanitizerChecked
2022  EmitCXXConstructorCall(ctor, Ctor_Complete, /*ForVirtualBase=*/false,
2023  /*Delegating=*/false, currAVS, E);
2024  }
2025 
2026  // Go to the next element.
2027  llvm::Value *next = Builder.CreateInBoundsGEP(
2028  elementType, cur, llvm::ConstantInt::get(SizeTy, 1), "arrayctor.next");
2029  cur->addIncoming(next, Builder.GetInsertBlock());
2030 
2031  // Check whether that's the end of the loop.
2032  llvm::Value *done = Builder.CreateICmpEQ(next, arrayEnd, "arrayctor.done");
2033  llvm::BasicBlock *contBB = createBasicBlock("arrayctor.cont");
2034  Builder.CreateCondBr(done, contBB, loopBB);
2035 
2036  // Patch the earlier check to skip over the loop.
2037  if (zeroCheckBranch) zeroCheckBranch->setSuccessor(0, contBB);
2038 
2039  EmitBlock(contBB);
2040 }
2041 
2043  Address addr,
2044  QualType type) {
2045  const RecordType *rtype = type->castAs<RecordType>();
2046  const CXXRecordDecl *record = cast<CXXRecordDecl>(rtype->getDecl());
2047  const CXXDestructorDecl *dtor = record->getDestructor();
2048  assert(!dtor->isTrivial());
2049  CGF.EmitCXXDestructorCall(dtor, Dtor_Complete, /*for vbase*/ false,
2050  /*Delegating=*/false, addr, type);
2051 }
2052 
2054  CXXCtorType Type,
2055  bool ForVirtualBase,
2056  bool Delegating,
2057  AggValueSlot ThisAVS,
2058  const CXXConstructExpr *E) {
2059  CallArgList Args;
2060  Address This = ThisAVS.getAddress();
2061  LangAS SlotAS = ThisAVS.getQualifiers().getAddressSpace();
2062  QualType ThisType = D->getThisType();
2063  LangAS ThisAS = ThisType.getTypePtr()->getPointeeType().getAddressSpace();
2064  llvm::Value *ThisPtr = This.getPointer();
2065 
2066  if (SlotAS != ThisAS) {
2067  unsigned TargetThisAS = getContext().getTargetAddressSpace(ThisAS);
2068  llvm::Type *NewType =
2069  ThisPtr->getType()->getPointerElementType()->getPointerTo(TargetThisAS);
2070  ThisPtr = getTargetHooks().performAddrSpaceCast(*this, This.getPointer(),
2071  ThisAS, SlotAS, NewType);
2072  }
2073 
2074  // Push the this ptr.
2075  Args.add(RValue::get(ThisPtr), D->getThisType());
2076 
2077  // If this is a trivial constructor, emit a memcpy now before we lose
2078  // the alignment information on the argument.
2079  // FIXME: It would be better to preserve alignment information into CallArg.
2081  assert(E->getNumArgs() == 1 && "unexpected argcount for trivial ctor");
2082 
2083  const Expr *Arg = E->getArg(0);
2084  LValue Src = EmitLValue(Arg);
2085  QualType DestTy = getContext().getTypeDeclType(D->getParent());
2086  LValue Dest = MakeAddrLValue(This, DestTy);
2087  EmitAggregateCopyCtor(Dest, Src, ThisAVS.mayOverlap());
2088  return;
2089  }
2090 
2091  // Add the rest of the user-supplied arguments.
2092  const FunctionProtoType *FPT = D->getType()->castAs<FunctionProtoType>();
2096  EmitCallArgs(Args, FPT, E->arguments(), E->getConstructor(),
2097  /*ParamsToSkip*/ 0, Order);
2098 
2099  EmitCXXConstructorCall(D, Type, ForVirtualBase, Delegating, This, Args,
2100  ThisAVS.mayOverlap(), E->getExprLoc(),
2101  ThisAVS.isSanitizerChecked());
2102 }
2103 
2105  const CXXConstructorDecl *Ctor,
2106  CXXCtorType Type, CallArgList &Args) {
2107  // We can't forward a variadic call.
2108  if (Ctor->isVariadic())
2109  return false;
2110 
2112  // If the parameters are callee-cleanup, it's not safe to forward.
2113  for (auto *P : Ctor->parameters())
2114  if (P->needsDestruction(CGF.getContext()))
2115  return false;
2116 
2117  // Likewise if they're inalloca.
2118  const CGFunctionInfo &Info =
2119  CGF.CGM.getTypes().arrangeCXXConstructorCall(Args, Ctor, Type, 0, 0);
2120  if (Info.usesInAlloca())
2121  return false;
2122  }
2123 
2124  // Anything else should be OK.
2125  return true;
2126 }
2127 
2129  CXXCtorType Type,
2130  bool ForVirtualBase,
2131  bool Delegating,
2132  Address This,
2133  CallArgList &Args,
2134  AggValueSlot::Overlap_t Overlap,
2135  SourceLocation Loc,
2136  bool NewPointerIsChecked) {
2137  const CXXRecordDecl *ClassDecl = D->getParent();
2138 
2139  if (!NewPointerIsChecked)
2141  getContext().getRecordType(ClassDecl), CharUnits::Zero());
2142 
2143  if (D->isTrivial() && D->isDefaultConstructor()) {
2144  assert(Args.size() == 1 && "trivial default ctor with args");
2145  return;
2146  }
2147 
2148  // If this is a trivial constructor, just emit what's needed. If this is a
2149  // union copy constructor, we must emit a memcpy, because the AST does not
2150  // model that copy.
2152  assert(Args.size() == 2 && "unexpected argcount for trivial ctor");
2153 
2154  QualType SrcTy = D->getParamDecl(0)->getType().getNonReferenceType();
2155  Address Src(Args[1].getRValue(*this).getScalarVal(),
2156  CGM.getNaturalTypeAlignment(SrcTy));
2157  LValue SrcLVal = MakeAddrLValue(Src, SrcTy);
2158  QualType DestTy = getContext().getTypeDeclType(ClassDecl);
2159  LValue DestLVal = MakeAddrLValue(This, DestTy);
2160  EmitAggregateCopyCtor(DestLVal, SrcLVal, Overlap);
2161  return;
2162  }
2163 
2164  bool PassPrototypeArgs = true;
2165  // Check whether we can actually emit the constructor before trying to do so.
2166  if (auto Inherited = D->getInheritedConstructor()) {
2167  PassPrototypeArgs = getTypes().inheritingCtorHasParams(Inherited, Type);
2168  if (PassPrototypeArgs && !canEmitDelegateCallArgs(*this, D, Type, Args)) {
2169  EmitInlinedInheritingCXXConstructorCall(D, Type, ForVirtualBase,
2170  Delegating, Args);
2171  return;
2172  }
2173  }
2174 
2175  // Insert any ABI-specific implicit constructor arguments.
2177  CGM.getCXXABI().addImplicitConstructorArgs(*this, D, Type, ForVirtualBase,
2178  Delegating, Args);
2179 
2180  // Emit the call.
2181  llvm::Constant *CalleePtr = CGM.getAddrOfCXXStructor(GlobalDecl(D, Type));
2183  Args, D, Type, ExtraArgs.Prefix, ExtraArgs.Suffix, PassPrototypeArgs);
2184  CGCallee Callee = CGCallee::forDirect(CalleePtr, GlobalDecl(D, Type));
2185  EmitCall(Info, Callee, ReturnValueSlot(), Args, nullptr, Loc);
2186 
2187  // Generate vtable assumptions if we're constructing a complete object
2188  // with a vtable. We don't do this for base subobjects for two reasons:
2189  // first, it's incorrect for classes with virtual bases, and second, we're
2190  // about to overwrite the vptrs anyway.
2191  // We also have to make sure if we can refer to vtable:
2192  // - Otherwise we can refer to vtable if it's safe to speculatively emit.
2193  // FIXME: If vtable is used by ctor/dtor, or if vtable is external and we are
2194  // sure that definition of vtable is not hidden,
2195  // then we are always safe to refer to it.
2196  // FIXME: It looks like InstCombine is very inefficient on dealing with
2197  // assumes. Make assumption loads require -fstrict-vtable-pointers temporarily.
2198  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2199  ClassDecl->isDynamicClass() && Type != Ctor_Base &&
2200  CGM.getCXXABI().canSpeculativelyEmitVTable(ClassDecl) &&
2201  CGM.getCodeGenOpts().StrictVTablePointers)
2202  EmitVTableAssumptionLoads(ClassDecl, This);
2203 }
2204 
2206  const CXXConstructorDecl *D, bool ForVirtualBase, Address This,
2207  bool InheritedFromVBase, const CXXInheritedCtorInitExpr *E) {
2208  CallArgList Args;
2209  CallArg ThisArg(RValue::get(This.getPointer()), D->getThisType());
2210 
2211  // Forward the parameters.
2212  if (InheritedFromVBase &&
2214  // Nothing to do; this construction is not responsible for constructing
2215  // the base class containing the inherited constructor.
2216  // FIXME: Can we just pass undef's for the remaining arguments if we don't
2217  // have constructor variants?
2218  Args.push_back(ThisArg);
2219  } else if (!CXXInheritedCtorInitExprArgs.empty()) {
2220  // The inheriting constructor was inlined; just inject its arguments.
2221  assert(CXXInheritedCtorInitExprArgs.size() >= D->getNumParams() &&
2222  "wrong number of parameters for inherited constructor call");
2223  Args = CXXInheritedCtorInitExprArgs;
2224  Args[0] = ThisArg;
2225  } else {
2226  // The inheriting constructor was not inlined. Emit delegating arguments.
2227  Args.push_back(ThisArg);
2228  const auto *OuterCtor = cast<CXXConstructorDecl>(CurCodeDecl);
2229  assert(OuterCtor->getNumParams() == D->getNumParams());
2230  assert(!OuterCtor->isVariadic() && "should have been inlined");
2231 
2232  for (const auto *Param : OuterCtor->parameters()) {
2233  assert(getContext().hasSameUnqualifiedType(
2234  OuterCtor->getParamDecl(Param->getFunctionScopeIndex())->getType(),
2235  Param->getType()));
2236  EmitDelegateCallArg(Args, Param, E->getLocation());
2237 
2238  // Forward __attribute__(pass_object_size).
2239  if (Param->hasAttr<PassObjectSizeAttr>()) {
2240  auto *POSParam = SizeArguments[Param];
2241  assert(POSParam && "missing pass_object_size value for forwarding");
2242  EmitDelegateCallArg(Args, POSParam, E->getLocation());
2243  }
2244  }
2245  }
2246 
2247  EmitCXXConstructorCall(D, Ctor_Base, ForVirtualBase, /*Delegating*/false,
2249  E->getLocation(), /*NewPointerIsChecked*/true);
2250 }
2251 
2253  const CXXConstructorDecl *Ctor, CXXCtorType CtorType, bool ForVirtualBase,
2254  bool Delegating, CallArgList &Args) {
2255  GlobalDecl GD(Ctor, CtorType);
2257  ApplyInlineDebugLocation DebugScope(*this, GD);
2258  RunCleanupsScope RunCleanups(*this);
2259 
2260  // Save the arguments to be passed to the inherited constructor.
2261  CXXInheritedCtorInitExprArgs = Args;
2262 
2263  FunctionArgList Params;
2264  QualType RetType = BuildFunctionArgList(CurGD, Params);
2265  FnRetTy = RetType;
2266 
2267  // Insert any ABI-specific implicit constructor arguments.
2268  CGM.getCXXABI().addImplicitConstructorArgs(*this, Ctor, CtorType,
2269  ForVirtualBase, Delegating, Args);
2270 
2271  // Emit a simplified prolog. We only need to emit the implicit params.
2272  assert(Args.size() >= Params.size() && "too few arguments for call");
2273  for (unsigned I = 0, N = Args.size(); I != N; ++I) {
2274  if (I < Params.size() && isa<ImplicitParamDecl>(Params[I])) {
2275  const RValue &RV = Args[I].getRValue(*this);
2276  assert(!RV.isComplex() && "complex indirect params not supported");
2277  ParamValue Val = RV.isScalar()
2280  EmitParmDecl(*Params[I], Val, I + 1);
2281  }
2282  }
2283 
2284  // Create a return value slot if the ABI implementation wants one.
2285  // FIXME: This is dumb, we should ask the ABI not to try to set the return
2286  // value instead.
2287  if (!RetType->isVoidType())
2288  ReturnValue = CreateIRTemp(RetType, "retval.inhctor");
2289 
2291  CXXThisValue = CXXABIThisValue;
2292 
2293  // Directly emit the constructor initializers.
2294  EmitCtorPrologue(Ctor, CtorType, Params);
2295 }
2296 
2298  llvm::Value *VTableGlobal =
2300  if (!VTableGlobal)
2301  return;
2302 
2303  // We can just use the base offset in the complete class.
2304  CharUnits NonVirtualOffset = Vptr.Base.getBaseOffset();
2305 
2306  if (!NonVirtualOffset.isZero())
2307  This =
2308  ApplyNonVirtualAndVirtualOffset(*this, This, NonVirtualOffset, nullptr,
2309  Vptr.VTableClass, Vptr.NearestVBase);
2310 
2311  llvm::Value *VPtrValue =
2312  GetVTablePtr(This, VTableGlobal->getType(), Vptr.VTableClass);
2313  llvm::Value *Cmp =
2314  Builder.CreateICmpEQ(VPtrValue, VTableGlobal, "cmp.vtables");
2315  Builder.CreateAssumption(Cmp);
2316 }
2317 
2319  Address This) {
2320  if (CGM.getCXXABI().doStructorsInitializeVPtrs(ClassDecl))
2321  for (const VPtr &Vptr : getVTablePointers(ClassDecl))
2323 }
2324 
2325 void
2327  Address This, Address Src,
2328  const CXXConstructExpr *E) {
2329  const FunctionProtoType *FPT = D->getType()->castAs<FunctionProtoType>();
2330 
2331  CallArgList Args;
2332 
2333  // Push the this ptr.
2334  Args.add(RValue::get(This.getPointer()), D->getThisType());
2335 
2336  // Push the src ptr.
2337  QualType QT = *(FPT->param_type_begin());
2338  llvm::Type *t = CGM.getTypes().ConvertType(QT);
2339  Src = Builder.CreateBitCast(Src, t);
2340  Args.add(RValue::get(Src.getPointer()), QT);
2341 
2342  // Skip over first argument (Src).
2343  EmitCallArgs(Args, FPT, drop_begin(E->arguments(), 1), E->getConstructor(),
2344  /*ParamsToSkip*/ 1);
2345 
2346  EmitCXXConstructorCall(D, Ctor_Complete, /*ForVirtualBase*/false,
2347  /*Delegating*/false, This, Args,
2349  /*NewPointerIsChecked*/false);
2350 }
2351 
2352 void
2354  CXXCtorType CtorType,
2355  const FunctionArgList &Args,
2356  SourceLocation Loc) {
2357  CallArgList DelegateArgs;
2358 
2359  FunctionArgList::const_iterator I = Args.begin(), E = Args.end();
2360  assert(I != E && "no parameters to constructor");
2361 
2362  // this
2364  DelegateArgs.add(RValue::get(This.getPointer()), (*I)->getType());
2365  ++I;
2366 
2367  // FIXME: The location of the VTT parameter in the parameter list is
2368  // specific to the Itanium ABI and shouldn't be hardcoded here.
2370  assert(I != E && "cannot skip vtt parameter, already done with args");
2371  assert((*I)->getType()->isPointerType() &&
2372  "skipping parameter not of vtt type");
2373  ++I;
2374  }
2375 
2376  // Explicit arguments.
2377  for (; I != E; ++I) {
2378  const VarDecl *param = *I;
2379  // FIXME: per-argument source location
2380  EmitDelegateCallArg(DelegateArgs, param, Loc);
2381  }
2382 
2383  EmitCXXConstructorCall(Ctor, CtorType, /*ForVirtualBase=*/false,
2384  /*Delegating=*/true, This, DelegateArgs,
2386  /*NewPointerIsChecked=*/true);
2387 }
2388 
2389 namespace {
2390  struct CallDelegatingCtorDtor final : EHScopeStack::Cleanup {
2391  const CXXDestructorDecl *Dtor;
2392  Address Addr;
2393  CXXDtorType Type;
2394 
2395  CallDelegatingCtorDtor(const CXXDestructorDecl *D, Address Addr,
2396  CXXDtorType Type)
2397  : Dtor(D), Addr(Addr), Type(Type) {}
2398 
2399  void Emit(CodeGenFunction &CGF, Flags flags) override {
2400  // We are calling the destructor from within the constructor.
2401  // Therefore, "this" should have the expected type.
2402  QualType ThisTy = Dtor->getThisObjectType();
2403  CGF.EmitCXXDestructorCall(Dtor, Type, /*ForVirtualBase=*/false,
2404  /*Delegating=*/true, Addr, ThisTy);
2405  }
2406  };
2407 } // end anonymous namespace
2408 
2409 void
2411  const FunctionArgList &Args) {
2412  assert(Ctor->isDelegatingConstructor());
2413 
2414  Address ThisPtr = LoadCXXThisAddress();
2415 
2416  AggValueSlot AggSlot =
2417  AggValueSlot::forAddr(ThisPtr, Qualifiers(),
2423  // Checks are made by the code that calls constructor.
2425 
2426  EmitAggExpr(Ctor->init_begin()[0]->getInit(), AggSlot);
2427 
2428  const CXXRecordDecl *ClassDecl = Ctor->getParent();
2429  if (CGM.getLangOpts().Exceptions && !ClassDecl->hasTrivialDestructor()) {
2430  CXXDtorType Type =
2432 
2433  EHStack.pushCleanup<CallDelegatingCtorDtor>(EHCleanup,
2434  ClassDecl->getDestructor(),
2435  ThisPtr, Type);
2436  }
2437 }
2438 
2440  CXXDtorType Type,
2441  bool ForVirtualBase,
2442  bool Delegating, Address This,
2443  QualType ThisTy) {
2444  CGM.getCXXABI().EmitDestructorCall(*this, DD, Type, ForVirtualBase,
2445  Delegating, This, ThisTy);
2446 }
2447 
2448 namespace {
2449  struct CallLocalDtor final : EHScopeStack::Cleanup {
2450  const CXXDestructorDecl *Dtor;
2451  Address Addr;
2452  QualType Ty;
2453 
2454  CallLocalDtor(const CXXDestructorDecl *D, Address Addr, QualType Ty)
2455  : Dtor(D), Addr(Addr), Ty(Ty) {}
2456 
2457  void Emit(CodeGenFunction &CGF, Flags flags) override {
2459  /*ForVirtualBase=*/false,
2460  /*Delegating=*/false, Addr, Ty);
2461  }
2462  };
2463 } // end anonymous namespace
2464 
2466  QualType T, Address Addr) {
2467  EHStack.pushCleanup<CallLocalDtor>(NormalAndEHCleanup, D, Addr, T);
2468 }
2469 
2471  CXXRecordDecl *ClassDecl = T->getAsCXXRecordDecl();
2472  if (!ClassDecl) return;
2473  if (ClassDecl->hasTrivialDestructor()) return;
2474 
2475  const CXXDestructorDecl *D = ClassDecl->getDestructor();
2476  assert(D && D->isUsed() && "destructor not marked as used!");
2477  PushDestructorCleanup(D, T, Addr);
2478 }
2479 
2481  // Compute the address point.
2482  llvm::Value *VTableAddressPoint =
2484  *this, Vptr.VTableClass, Vptr.Base, Vptr.NearestVBase);
2485 
2486  if (!VTableAddressPoint)
2487  return;
2488 
2489  // Compute where to store the address point.
2490  llvm::Value *VirtualOffset = nullptr;
2491  CharUnits NonVirtualOffset = CharUnits::Zero();
2492 
2493  if (CGM.getCXXABI().isVirtualOffsetNeededForVTableField(*this, Vptr)) {
2494  // We need to use the virtual base offset offset because the virtual base
2495  // might have a different offset in the most derived class.
2496 
2497  VirtualOffset = CGM.getCXXABI().GetVirtualBaseClassOffset(
2498  *this, LoadCXXThisAddress(), Vptr.VTableClass, Vptr.NearestVBase);
2499  NonVirtualOffset = Vptr.OffsetFromNearestVBase;
2500  } else {
2501  // We can just use the base offset in the complete class.
2502  NonVirtualOffset = Vptr.Base.getBaseOffset();
2503  }
2504 
2505  // Apply the offsets.
2506  Address VTableField = LoadCXXThisAddress();
2507 
2508  if (!NonVirtualOffset.isZero() || VirtualOffset)
2509  VTableField = ApplyNonVirtualAndVirtualOffset(
2510  *this, VTableField, NonVirtualOffset, VirtualOffset, Vptr.VTableClass,
2511  Vptr.NearestVBase);
2512 
2513  // Finally, store the address point. Use the same LLVM types as the field to
2514  // support optimization.
2515  unsigned GlobalsAS = CGM.getDataLayout().getDefaultGlobalsAddressSpace();
2516  unsigned ProgAS = CGM.getDataLayout().getProgramAddressSpace();
2517  llvm::Type *VTablePtrTy =
2518  llvm::FunctionType::get(CGM.Int32Ty, /*isVarArg=*/true)
2519  ->getPointerTo(ProgAS)
2520  ->getPointerTo(GlobalsAS);
2522  VTableField, VTablePtrTy->getPointerTo(GlobalsAS));
2523  VTableAddressPoint = Builder.CreatePointerBitCastOrAddrSpaceCast(
2524  VTableAddressPoint, VTablePtrTy);
2525 
2526  llvm::StoreInst *Store = Builder.CreateStore(VTableAddressPoint, VTableField);
2527  TBAAAccessInfo TBAAInfo = CGM.getTBAAVTablePtrAccessInfo(VTablePtrTy);
2529  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2530  CGM.getCodeGenOpts().StrictVTablePointers)
2532 }
2533 
2536  CodeGenFunction::VPtrsVector VPtrsResult;
2537  VisitedVirtualBasesSetTy VBases;
2539  /*NearestVBase=*/nullptr,
2540  /*OffsetFromNearestVBase=*/CharUnits::Zero(),
2541  /*BaseIsNonVirtualPrimaryBase=*/false, VTableClass, VBases,
2542  VPtrsResult);
2543  return VPtrsResult;
2544 }
2545 
2547  const CXXRecordDecl *NearestVBase,
2548  CharUnits OffsetFromNearestVBase,
2549  bool BaseIsNonVirtualPrimaryBase,
2550  const CXXRecordDecl *VTableClass,
2551  VisitedVirtualBasesSetTy &VBases,
2552  VPtrsVector &Vptrs) {
2553  // If this base is a non-virtual primary base the address point has already
2554  // been set.
2555  if (!BaseIsNonVirtualPrimaryBase) {
2556  // Initialize the vtable pointer for this base.
2557  VPtr Vptr = {Base, NearestVBase, OffsetFromNearestVBase, VTableClass};
2558  Vptrs.push_back(Vptr);
2559  }
2560 
2561  const CXXRecordDecl *RD = Base.getBase();
2562 
2563  // Traverse bases.
2564  for (const auto &I : RD->bases()) {
2565  auto *BaseDecl =
2566  cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
2567 
2568  // Ignore classes without a vtable.
2569  if (!BaseDecl->isDynamicClass())
2570  continue;
2571 
2572  CharUnits BaseOffset;
2573  CharUnits BaseOffsetFromNearestVBase;
2574  bool BaseDeclIsNonVirtualPrimaryBase;
2575 
2576  if (I.isVirtual()) {
2577  // Check if we've visited this virtual base before.
2578  if (!VBases.insert(BaseDecl).second)
2579  continue;
2580 
2581  const ASTRecordLayout &Layout =
2582  getContext().getASTRecordLayout(VTableClass);
2583 
2584  BaseOffset = Layout.getVBaseClassOffset(BaseDecl);
2585  BaseOffsetFromNearestVBase = CharUnits::Zero();
2586  BaseDeclIsNonVirtualPrimaryBase = false;
2587  } else {
2588  const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
2589 
2590  BaseOffset = Base.getBaseOffset() + Layout.getBaseClassOffset(BaseDecl);
2591  BaseOffsetFromNearestVBase =
2592  OffsetFromNearestVBase + Layout.getBaseClassOffset(BaseDecl);
2593  BaseDeclIsNonVirtualPrimaryBase = Layout.getPrimaryBase() == BaseDecl;
2594  }
2595 
2597  BaseSubobject(BaseDecl, BaseOffset),
2598  I.isVirtual() ? BaseDecl : NearestVBase, BaseOffsetFromNearestVBase,
2599  BaseDeclIsNonVirtualPrimaryBase, VTableClass, VBases, Vptrs);
2600  }
2601 }
2602 
2604  // Ignore classes without a vtable.
2605  if (!RD->isDynamicClass())
2606  return;
2607 
2608  // Initialize the vtable pointers for this class and all of its bases.
2610  for (const VPtr &Vptr : getVTablePointers(RD))
2612 
2613  if (RD->getNumVBases())
2615 }
2616 
2618  llvm::Type *VTableTy,
2619  const CXXRecordDecl *RD) {
2620  Address VTablePtrSrc = Builder.CreateElementBitCast(This, VTableTy);
2621  llvm::Instruction *VTable = Builder.CreateLoad(VTablePtrSrc, "vtable");
2622  TBAAAccessInfo TBAAInfo = CGM.getTBAAVTablePtrAccessInfo(VTableTy);
2623  CGM.DecorateInstructionWithTBAA(VTable, TBAAInfo);
2624 
2625  if (CGM.getCodeGenOpts().OptimizationLevel > 0 &&
2626  CGM.getCodeGenOpts().StrictVTablePointers)
2628 
2629  return VTable;
2630 }
2631 
2632 // If a class has a single non-virtual base and does not introduce or override
2633 // virtual member functions or fields, it will have the same layout as its base.
2634 // This function returns the least derived such class.
2635 //
2636 // Casting an instance of a base class to such a derived class is technically
2637 // undefined behavior, but it is a relatively common hack for introducing member
2638 // functions on class instances with specific properties (e.g. llvm::Operator)
2639 // that works under most compilers and should not have security implications, so
2640 // we allow it by default. It can be disabled with -fsanitize=cfi-cast-strict.
2641 static const CXXRecordDecl *
2643  if (!RD->field_empty())
2644  return RD;
2645 
2646  if (RD->getNumVBases() != 0)
2647  return RD;
2648 
2649  if (RD->getNumBases() != 1)
2650  return RD;
2651 
2652  for (const CXXMethodDecl *MD : RD->methods()) {
2653  if (MD->isVirtual()) {
2654  // Virtual member functions are only ok if they are implicit destructors
2655  // because the implicit destructor will have the same semantics as the
2656  // base class's destructor if no fields are added.
2657  if (isa<CXXDestructorDecl>(MD) && MD->isImplicit())
2658  continue;
2659  return RD;
2660  }
2661  }
2662 
2664  RD->bases_begin()->getType()->getAsCXXRecordDecl());
2665 }
2666 
2668  llvm::Value *VTable,
2669  SourceLocation Loc) {
2670  if (SanOpts.has(SanitizerKind::CFIVCall))
2672  else if (CGM.getCodeGenOpts().WholeProgramVTables &&
2673  // Don't insert type test assumes if we are forcing public std
2674  // visibility.
2676  llvm::Metadata *MD =
2678  llvm::Value *TypeId =
2679  llvm::MetadataAsValue::get(CGM.getLLVMContext(), MD);
2680 
2681  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2682  llvm::Value *TypeTest =
2683  Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::type_test),
2684  {CastedVTable, TypeId});
2685  Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::assume), TypeTest);
2686  }
2687 }
2688 
2690  llvm::Value *VTable,
2691  CFITypeCheckKind TCK,
2692  SourceLocation Loc) {
2693  if (!SanOpts.has(SanitizerKind::CFICastStrict))
2695 
2696  EmitVTablePtrCheck(RD, VTable, TCK, Loc);
2697 }
2698 
2700  llvm::Value *Derived,
2701  bool MayBeNull,
2702  CFITypeCheckKind TCK,
2703  SourceLocation Loc) {
2704  if (!getLangOpts().CPlusPlus)
2705  return;
2706 
2707  auto *ClassTy = T->getAs<RecordType>();
2708  if (!ClassTy)
2709  return;
2710 
2711  const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(ClassTy->getDecl());
2712 
2713  if (!ClassDecl->isCompleteDefinition() || !ClassDecl->isDynamicClass())
2714  return;
2715 
2716  if (!SanOpts.has(SanitizerKind::CFICastStrict))
2717  ClassDecl = LeastDerivedClassWithSameLayout(ClassDecl);
2718 
2719  llvm::BasicBlock *ContBlock = nullptr;
2720 
2721  if (MayBeNull) {
2722  llvm::Value *DerivedNotNull =
2723  Builder.CreateIsNotNull(Derived, "cast.nonnull");
2724 
2725  llvm::BasicBlock *CheckBlock = createBasicBlock("cast.check");
2726  ContBlock = createBasicBlock("cast.cont");
2727 
2728  Builder.CreateCondBr(DerivedNotNull, CheckBlock, ContBlock);
2729 
2730  EmitBlock(CheckBlock);
2731  }
2732 
2733  llvm::Value *VTable;
2734  std::tie(VTable, ClassDecl) = CGM.getCXXABI().LoadVTablePtr(
2735  *this, Address(Derived, getPointerAlign()), ClassDecl);
2736 
2737  EmitVTablePtrCheck(ClassDecl, VTable, TCK, Loc);
2738 
2739  if (MayBeNull) {
2740  Builder.CreateBr(ContBlock);
2741  EmitBlock(ContBlock);
2742  }
2743 }
2744 
2746  llvm::Value *VTable,
2747  CFITypeCheckKind TCK,
2748  SourceLocation Loc) {
2749  if (!CGM.getCodeGenOpts().SanitizeCfiCrossDso &&
2751  return;
2752 
2753  SanitizerMask M;
2754  llvm::SanitizerStatKind SSK;
2755  switch (TCK) {
2756  case CFITCK_VCall:
2757  M = SanitizerKind::CFIVCall;
2758  SSK = llvm::SanStat_CFI_VCall;
2759  break;
2760  case CFITCK_NVCall:
2761  M = SanitizerKind::CFINVCall;
2762  SSK = llvm::SanStat_CFI_NVCall;
2763  break;
2764  case CFITCK_DerivedCast:
2765  M = SanitizerKind::CFIDerivedCast;
2766  SSK = llvm::SanStat_CFI_DerivedCast;
2767  break;
2768  case CFITCK_UnrelatedCast:
2769  M = SanitizerKind::CFIUnrelatedCast;
2770  SSK = llvm::SanStat_CFI_UnrelatedCast;
2771  break;
2772  case CFITCK_ICall:
2773  case CFITCK_NVMFCall:
2774  case CFITCK_VMFCall:
2775  llvm_unreachable("unexpected sanitizer kind");
2776  }
2777 
2779  if (getContext().getNoSanitizeList().containsType(M, TypeName))
2780  return;
2781 
2782  SanitizerScope SanScope(this);
2784 
2785  llvm::Metadata *MD =
2787  llvm::Value *TypeId = llvm::MetadataAsValue::get(getLLVMContext(), MD);
2788 
2789  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2790  llvm::Value *TypeTest = Builder.CreateCall(
2791  CGM.getIntrinsic(llvm::Intrinsic::type_test), {CastedVTable, TypeId});
2792 
2793  llvm::Constant *StaticData[] = {
2794  llvm::ConstantInt::get(Int8Ty, TCK),
2797  };
2798 
2799  auto CrossDsoTypeId = CGM.CreateCrossDsoCfiTypeId(MD);
2800  if (CGM.getCodeGenOpts().SanitizeCfiCrossDso && CrossDsoTypeId) {
2801  EmitCfiSlowPathCheck(M, TypeTest, CrossDsoTypeId, CastedVTable, StaticData);
2802  return;
2803  }
2804 
2805  if (CGM.getCodeGenOpts().SanitizeTrap.has(M)) {
2806  EmitTrapCheck(TypeTest, SanitizerHandler::CFICheckFail);
2807  return;
2808  }
2809 
2810  llvm::Value *AllVtables = llvm::MetadataAsValue::get(
2811  CGM.getLLVMContext(),
2812  llvm::MDString::get(CGM.getLLVMContext(), "all-vtables"));
2813  llvm::Value *ValidVtable = Builder.CreateCall(
2814  CGM.getIntrinsic(llvm::Intrinsic::type_test), {CastedVTable, AllVtables});
2815  EmitCheck(std::make_pair(TypeTest, M), SanitizerHandler::CFICheckFail,
2816  StaticData, {CastedVTable, ValidVtable});
2817 }
2818 
2820  if (!CGM.getCodeGenOpts().WholeProgramVTables ||
2822  return false;
2823 
2824  if (CGM.getCodeGenOpts().VirtualFunctionElimination)
2825  return true;
2826 
2827  if (!SanOpts.has(SanitizerKind::CFIVCall) ||
2828  !CGM.getCodeGenOpts().SanitizeTrap.has(SanitizerKind::CFIVCall))
2829  return false;
2830 
2832  return !getContext().getNoSanitizeList().containsType(SanitizerKind::CFIVCall,
2833  TypeName);
2834 }
2835 
2837  const CXXRecordDecl *RD, llvm::Value *VTable, uint64_t VTableByteOffset) {
2838  SanitizerScope SanScope(this);
2839 
2840  EmitSanitizerStatReport(llvm::SanStat_CFI_VCall);
2841 
2842  llvm::Metadata *MD =
2844  llvm::Value *TypeId = llvm::MetadataAsValue::get(CGM.getLLVMContext(), MD);
2845 
2846  llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
2847  llvm::Value *CheckedLoad = Builder.CreateCall(
2848  CGM.getIntrinsic(llvm::Intrinsic::type_checked_load),
2849  {CastedVTable, llvm::ConstantInt::get(Int32Ty, VTableByteOffset),
2850  TypeId});
2851  llvm::Value *CheckResult = Builder.CreateExtractValue(CheckedLoad, 1);
2852 
2854  if (SanOpts.has(SanitizerKind::CFIVCall) &&
2855  !getContext().getNoSanitizeList().containsType(SanitizerKind::CFIVCall,
2856  TypeName)) {
2857  EmitCheck(std::make_pair(CheckResult, SanitizerKind::CFIVCall),
2858  SanitizerHandler::CFICheckFail, {}, {});
2859  }
2860 
2861  return Builder.CreateBitCast(
2862  Builder.CreateExtractValue(CheckedLoad, 0),
2863  cast<llvm::PointerType>(VTable->getType())->getElementType());
2864 }
2865 
2867  const CXXMethodDecl *callOperator,
2868  CallArgList &callArgs) {
2869  // Get the address of the call operator.
2870  const CGFunctionInfo &calleeFnInfo =
2871  CGM.getTypes().arrangeCXXMethodDeclaration(callOperator);
2872  llvm::Constant *calleePtr =
2873  CGM.GetAddrOfFunction(GlobalDecl(callOperator),
2874  CGM.getTypes().GetFunctionType(calleeFnInfo));
2875 
2876  // Prepare the return slot.
2877  const FunctionProtoType *FPT =
2878  callOperator->getType()->castAs<FunctionProtoType>();
2879  QualType resultType = FPT->getReturnType();
2880  ReturnValueSlot returnSlot;
2881  if (!resultType->isVoidType() &&
2882  calleeFnInfo.getReturnInfo().getKind() == ABIArgInfo::Indirect &&
2883  !hasScalarEvaluationKind(calleeFnInfo.getReturnType()))
2884  returnSlot =
2885  ReturnValueSlot(ReturnValue, resultType.isVolatileQualified(),
2886  /*IsUnused=*/false, /*IsExternallyDestructed=*/true);
2887 
2888  // We don't need to separately arrange the call arguments because
2889  // the call can't be variadic anyway --- it's impossible to forward
2890  // variadic arguments.
2891 
2892  // Now emit our call.
2893  auto callee = CGCallee::forDirect(calleePtr, GlobalDecl(callOperator));
2894  RValue RV = EmitCall(calleeFnInfo, callee, returnSlot, callArgs);
2895 
2896  // If necessary, copy the returned value into the slot.
2897  if (!resultType->isVoidType() && returnSlot.isNull()) {
2898  if (getLangOpts().ObjCAutoRefCount && resultType->isObjCRetainableType()) {
2900  }
2901  EmitReturnOfRValue(RV, resultType);
2902  } else
2904 }
2905 
2907  const BlockDecl *BD = BlockInfo->getBlockDecl();
2908  const VarDecl *variable = BD->capture_begin()->getVariable();
2909  const CXXRecordDecl *Lambda = variable->getType()->getAsCXXRecordDecl();
2910  const CXXMethodDecl *CallOp = Lambda->getLambdaCallOperator();
2911 
2912  if (CallOp->isVariadic()) {
2913  // FIXME: Making this work correctly is nasty because it requires either
2914  // cloning the body of the call operator or making the call operator
2915  // forward.
2916  CGM.ErrorUnsupported(CurCodeDecl, "lambda conversion to variadic function");
2917  return;
2918  }
2919 
2920  // Start building arguments for forwarding call
2921  CallArgList CallArgs;
2922 
2923  QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
2924  Address ThisPtr = GetAddrOfBlockDecl(variable);
2925  CallArgs.add(RValue::get(ThisPtr.getPointer()), ThisType);
2926 
2927  // Add the rest of the parameters.
2928  for (auto param : BD->parameters())
2929  EmitDelegateCallArg(CallArgs, param, param->getBeginLoc());
2930 
2931  assert(!Lambda->isGenericLambda() &&
2932  "generic lambda interconversion to block not implemented");
2933  EmitForwardingCallToLambda(CallOp, CallArgs);
2934 }
2935 
2937  const CXXRecordDecl *Lambda = MD->getParent();
2938 
2939  // Start building arguments for forwarding call
2940  CallArgList CallArgs;
2941 
2942  QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
2943  llvm::Value *ThisPtr = llvm::UndefValue::get(getTypes().ConvertType(ThisType));
2944  CallArgs.add(RValue::get(ThisPtr), ThisType);
2945 
2946  // Add the rest of the parameters.
2947  for (auto Param : MD->parameters())
2948  EmitDelegateCallArg(CallArgs, Param, Param->getBeginLoc());
2949 
2950  const CXXMethodDecl *CallOp = Lambda->getLambdaCallOperator();
2951  // For a generic lambda, find the corresponding call operator specialization
2952  // to which the call to the static-invoker shall be forwarded.
2953  if (Lambda->isGenericLambda()) {
2954  assert(MD->isFunctionTemplateSpecialization());
2956  FunctionTemplateDecl *CallOpTemplate = CallOp->getDescribedFunctionTemplate();
2957  void *InsertPos = nullptr;
2958  FunctionDecl *CorrespondingCallOpSpecialization =
2959  CallOpTemplate->findSpecialization(TAL->asArray(), InsertPos);
2960  assert(CorrespondingCallOpSpecialization);
2961  CallOp = cast<CXXMethodDecl>(CorrespondingCallOpSpecialization);
2962  }
2963  EmitForwardingCallToLambda(CallOp, CallArgs);
2964 }
2965 
2967  if (MD->isVariadic()) {
2968  // FIXME: Making this work correctly is nasty because it requires either
2969  // cloning the body of the call operator or making the call operator forward.
2970  CGM.ErrorUnsupported(MD, "lambda conversion to variadic function");
2971  return;
2972  }
2973 
2975 }
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:3297
clang::CodeGen::CodeGenFunction::EmitVTableTypeCheckedLoad
llvm::Value * EmitVTableTypeCheckedLoad(const CXXRecordDecl *RD, llvm::Value *VTable, uint64_t VTableByteOffset)
Emit a type checked load from the given vtable.
Definition: CGClass.cpp:2836
clang::CXXMethodDecl::getThisType
QualType getThisType() const
Return the type of the this pointer.
Definition: DeclCXX.cpp:2468
clang::CodeGen::CodeGenFunction::SanitizerScope
RAII object to set/unset CodeGenFunction::IsSanitizerScope.
Definition: CodeGenFunction.h:489
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:2689
clang::GlobalDecl::getDtorType
CXXDtorType getDtorType() const
Definition: GlobalDecl.h:109
clang::CodeGen::CodeGenFunction::destroyCXXObject
static Destroyer destroyCXXObject
Definition: CodeGenFunction.h:2834
clang::FunctionProtoType::param_type_begin
param_type_iterator param_type_begin() const
Definition: Type.h:4249
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:216
clang::CodeGen::CGBuilderTy::CreateMemCpy
llvm::CallInst * CreateMemCpy(Address Dest, Address Src, llvm::Value *Size, bool IsVolatile=false)
Definition: CGBuilder.h:285
clang::CodeGen::CodeGenFunction::EvaluationOrder::Default
@ Default
! No language constraints on evaluation order.
clang::CXXCtorInitializer::getAnyMember
FieldDecl * getAnyMember() const
Definition: DeclCXX.h:2304
clang::CodeGen::CodeGenTypeCache::SizeTy
llvm::IntegerType * SizeTy
Definition: CodeGenTypeCache.h:50
max
__DEVICE__ int max(int __a, int __b)
Definition: __clang_cuda_math.h:194
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:3506
clang::FunctionDecl::isDefaulted
bool isDefaulted() const
Whether this function is defaulted.
Definition: Decl.h:2180
clang::CodeGen::CodeGenFunction::EmitLambdaStaticInvokeBody
void EmitLambdaStaticInvokeBody(const CXXMethodDecl *MD)
Definition: CGClass.cpp:2966
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Definition: CGValue.h:150
clang::BlockDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:4196
clang::CXXMethodDecl::getThisObjectType
QualType getThisObjectType() const
Return the type of the object pointed by this.
Definition: DeclCXX.cpp:2479
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uint64_t getFieldOffset(unsigned FieldNo) const
getFieldOffset - Get the offset of the given field index, in bits.
Definition: RecordLayout.h:200
clang::CodeGen::CodeGenTypeCache::Int8PtrTy
llvm::PointerType * Int8PtrTy
Definition: CodeGenTypeCache.h:57
clang::CXXConstructorDecl
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2390
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:1453
clang::CXXMethodDecl::isCopyAssignmentOperator
bool isCopyAssignmentOperator() const
Determine whether this is a copy-assignment operator, regardless of whether it was declared implicitl...
Definition: DeclCXX.cpp:2376
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:1873
clang::FunctionDecl::getNumParams
unsigned getNumParams() const
Return the number of parameters this function must have based on its FunctionType.
Definition: Decl.cpp:3321
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llvm::Value * LoadCXXThis()
LoadCXXThis - Load the value of 'this'.
Definition: CodeGenFunction.h:2724
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:2745
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@ TEK_Aggregate
Definition: CodeGenFunction.h:115
clang::CodeGen::RValue
RValue - This trivial value class is used to represent the result of an expression that is evaluated.
Definition: CGValue.h:39
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uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2162
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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:3682
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const Type * getBaseClass() const
If this is a base class initializer, returns the type of the base class.
Definition: DeclCXX.cpp:2549
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bool isEffectivelyFinal() const
Determine whether it's impossible for a class to be derived from this class.
Definition: DeclCXX.cpp:2034
type
clang::CodeGen::CodeGenFunction::sanitizePerformTypeCheck
bool sanitizePerformTypeCheck() const
Whether any type-checking sanitizers are enabled.
Definition: CGExpr.cpp:670
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ItaniumVTableContext & getItaniumVTableContext()
Definition: CodeGenModule.h:730
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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:3053
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SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:426
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Kind getKind() const
Definition: CGFunctionInfo.h:285
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:3467
clang::RecordDecl::mayInsertExtraPadding
bool mayInsertExtraPadding(bool EmitRemark=false) const
Whether we are allowed to insert extra padding between fields.
Definition: Decl.cpp:4593
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:208
string
string(SUBSTRING ${CMAKE_CURRENT_BINARY_DIR} 0 ${PATH_LIB_START} PATH_HEAD) string(SUBSTRING $
Definition: CMakeLists.txt:22
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:547
clang::CodeGen::CodeGenFunction::CurCodeDecl
const Decl * CurCodeDecl
CurCodeDecl - This is the inner-most code context, which includes blocks.
Definition: CodeGenFunction.h:323
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:436
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:2916
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:4147
clang::CodeGen::AggValueSlot::DoesNotNeedGCBarriers
@ DoesNotNeedGCBarriers
Definition: CGValue.h:528
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:66
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:3602
HasTrivialDestructorBody
static bool HasTrivialDestructorBody(ASTContext &Context, const CXXRecordDecl *BaseClassDecl, const CXXRecordDecl *MostDerivedClassDecl)
Definition: CGClass.cpp:1361
clang::CodeGen::CodeGenFunction::EmitSynthesizedCXXCopyCtorCall
void EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D, Address This, Address Src, const CXXConstructExpr *E)
Definition: CGClass.cpp:2326
llvm::SmallVector
Definition: LLVM.h:38
clang::RecordDecl::field_empty
bool field_empty() const
Definition: Decl.h:4044
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:89
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6447
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:336
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:1210
clang::CodeGen::CodeGenFunction::CFITCK_VCall
@ CFITCK_VCall
Definition: CodeGenFunction.h:2216
clang::CodeGen::LValue::getAddress
Address getAddress(CodeGenFunction &CGF) const
Definition: CGValue.h:329
clang::CodeGen::CodeGenFunction::EmitDestructorBody
void EmitDestructorBody(FunctionArgList &Args)
EmitDestructorBody - Emits the body of the current destructor.
Definition: CGClass.cpp:1442
EmitLValueForAnyFieldInitialization
static void EmitLValueForAnyFieldInitialization(CodeGenFunction &CGF, CXXCtorInitializer *MemberInit, LValue &LHS)
Definition: CGClass.cpp:616
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:6616
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:1974
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:2544
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:278
clang::CodeGen::CodeGenTypeCache::getPointerAlign
CharUnits getPointerAlign() const
Definition: CodeGenTypeCache.h:111
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:661
clang::TypeDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: Decl.h:3119
Attr.h
clang::FunctionDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:2471
AttributeLangSupport::C
@ C
Definition: SemaDeclAttr.cpp:52
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:154
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:702
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2792
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:6186
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:145
clang::TargetInfo::getCXXABI
TargetCXXABI getCXXABI() const
Get the C++ ABI currently in use.
Definition: TargetInfo.h:1171
clang::TargetCXXABI::isItaniumFamily
bool isItaniumFamily() const
Does this ABI generally fall into the Itanium family of ABIs?
Definition: TargetCXXABI.h:148
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:2231
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:2346
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:95
clang::CodeGen::CodeGenFunction::emitImplicitAssignmentOperatorBody
void emitImplicitAssignmentOperatorBody(FunctionArgList &Args)
Definition: CGClass.cpp:1555
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:631
TargetInfo.h
llvm::SmallPtrSet
Definition: ASTContext.h:81
clang::UnaryOperator
UnaryOperator - This represents the unary-expression's (except sizeof and alignof),...
Definition: Expr.h:2093
clang::Ctor_Base
@ Ctor_Base
Base object ctor.
Definition: ABI.h:26
clang::CodeGen::CodeGenModule::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenModule.h:703
clang::Ctor_Complete
@ Ctor_Complete
Complete object ctor.
Definition: ABI.h:25
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:6951
clang::CXXRecordDecl::isGenericLambda
bool isGenericLambda() const
Determine whether this class describes a generic lambda function object (i.e.
Definition: DeclCXX.cpp:1470
clang::FunctionDecl::getTemplateSpecializationArgs
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3769
clang::CodeGen::CodeGenFunction::EmitLambdaDelegatingInvokeBody
void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD)
Definition: CGClass.cpp:2936
clang::CodeGen::CodeGenFunction::HaveInsertPoint
bool HaveInsertPoint() const
HaveInsertPoint - True if an insertion point is defined.
Definition: CodeGenFunction.h:2387
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:4262
clang::CodeGen::CodeGenFunction::getDestroyer
Destroyer * getDestroyer(QualType::DestructionKind destructionKind)
Definition: CGDecl.cpp:2074
clang::CXXCtorInitializer::isAnyMemberInitializer
bool isAnyMemberInitializer() const
Definition: DeclCXX.h:2239
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:2690
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:2353
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:2379
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:50
clang::CodeGen::CodeGenModule::computeNonVirtualBaseClassOffset
CharUnits computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass, CastExpr::path_const_iterator Start, CastExpr::path_const_iterator End)
Definition: CGClass.cpp:168
clang::ASTContext::toBits
int64_t toBits(CharUnits CharSize) const
Convert a size in characters to a size in bits.
Definition: ASTContext.cpp:2405
clang::CodeGen::CGFunctionInfo::getReturnType
CanQualType getReturnType() const
Definition: CGFunctionInfo.h:687
End
SourceLocation End
Definition: USRLocFinder.cpp:167
clang::CXXCtorInitializer::getIndirectMember
IndirectFieldDecl * getIndirectMember() const
Definition: DeclCXX.h:2312
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:1916
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:692
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:459
clang::CodeGen::CallArgList::add
void add(RValue rvalue, QualType type)
Definition: CGCall.h:288
clang::CXXCtorInitializer::isIndirectMemberInitializer
bool isIndirectMemberInitializer() const
Definition: DeclCXX.h:2243
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:2061
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:274
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:1424
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:395
clang::CXXRecordDecl::getLambdaCallOperator
CXXMethodDecl * getLambdaCallOperator() const
Retrieve the lambda call operator of the closure type if this is a closure type.
Definition: DeclCXX.cpp:1501
clang::CodeGen::CGBuilderTy::CreateBitCast
Address CreateBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:151
clang::FunctionProtoType::isVariadic
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4212
clang::CXXMethodDecl::isMoveAssignmentOperator
bool isMoveAssignmentOperator() const
Determine whether this is a move assignment operator.
Definition: DeclCXX.cpp:2397
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1478
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:1916
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:2667
clang::CXXCtorInitializer::getSourceLocation
SourceLocation getSourceLocation() const
Determine the source location of the initializer.
Definition: DeclCXX.cpp:2556
clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar
Address GetAddrOfLocalVar(const VarDecl *VD)
GetAddrOfLocalVar - Return the address of a local variable.
Definition: CodeGenFunction.h:2640
Offset
unsigned Offset
Definition: Format.cpp:2151
clang::CodeGen::CodeGenFunction::EmitCXXDestructorCall
void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This, QualType ThisTy)
Definition: CGClass.cpp:2439
clang::GlobalDecl
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:55
EmitMemberInitializer
static void EmitMemberInitializer(CodeGenFunction &CGF, const CXXRecordDecl *ClassDecl, CXXCtorInitializer *MemberInit, const CXXConstructorDecl *Constructor, FunctionArgList &Args)
Definition: CGClass.cpp:630
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:2819
clang::CodeGen::CodeGenFunction::getOverlapForFieldInit
AggValueSlot::Overlap_t getOverlapForFieldInit(const FieldDecl *FD)
Determine whether a field initialization may overlap some other object.
Definition: CGExprAgg.cpp:2007
clang::CodeGen::CodeGenFunction::EmitSanitizerStatReport
void EmitSanitizerStatReport(llvm::SanitizerStatKind SSK)
Definition: CodeGenFunction.cpp:2504
CodeGenOptions.h
clang::Qualifiers::getAddressSpace
LangAS getAddressSpace() const
Definition: Type.h:361
clang::CodeGen::ReturnValueSlot
ReturnValueSlot - Contains the address where the return value of a function can be stored,...
Definition: CGCall.h:362
clang::FunctionTemplateDecl
Declaration of a template function.
Definition: DeclTemplate.h:973
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6680
V
#define V(N, I)
Definition: ASTContext.h:3018
clang::BlockDecl::capture_begin
capture_const_iterator capture_begin() const
Definition: Decl.h:4239
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:812
min
__DEVICE__ int min(int __a, int __b)
Definition: __clang_cuda_math.h:195
clang::CodeGen::CodeGenFunction::BlockInfo
const CodeGen::CGBlockInfo * BlockInfo
Definition: CodeGenFunction.h:551
clang::CodeGen::CodeGenFunction::VPtr::NearestVBase
const CXXRecordDecl * NearestVBase
Definition: CodeGenFunction.h:2189
clang::CodeGen::TBAAAccessInfo
Definition: CodeGenTBAA.h:42
clang::CodeGen::CodeGenFunction::hasScalarEvaluationKind
static bool hasScalarEvaluationKind(QualType T)
Definition: CodeGenFunction.h:2337
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:288
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4608
clang::CodeGen::CodeGenModule::CreateMetadataIdentifierForType
llvm::Metadata * CreateMetadataIdentifierForType(QualType T)
Create a metadata identifier for the given type.
Definition: CodeGenModule.cpp:6171
clang::CodeGen::CodeGenFunction::TCK_UpcastToVirtualBase
@ TCK_UpcastToVirtualBase
Checking the operand of a cast to a virtual base object.
Definition: CodeGenFunction.h:2896
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:1398
DeclTemplate.h
clang::SanitizerSet
Definition: Sanitizers.h:152
clang::CodeGen::AggValueSlot::IsSanitizerChecked
@ IsSanitizerChecked
Definition: CGValue.h:529
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:2534
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:2175
clang::CXXRecordDecl::methods
method_range methods() const
Definition: DeclCXX.h:630
clang::FunctionDecl::isTrivial
bool isTrivial() const
Whether this function is "trivial" in some specialized C++ senses.
Definition: Decl.h:2172
clang::BlockDecl
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:4110
clang::QualType::getAddressSpace
LangAS getAddressSpace() const
Return the address space of this type.
Definition: Type.h:6541
clang::CodeGen::LValue::isVolatileQualified
bool isVolatileQualified() const
Definition: CGValue.h:260
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3727
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:479
clang::CXXCtorInitializer::getInit
Expr * getInit() const
Get the initializer.
Definition: DeclCXX.h:2360
clang::CodeGen::CodeGenFunction::EmitVTableAssumptionLoad
void EmitVTableAssumptionLoad(const VPtr &vptr, Address This)
Emit assumption that vptr load == global vtable.
Definition: CGClass.cpp:2297
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:3187
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:297
clang::CodeGen::CGBuilderTy::CreatePointerBitCastOrAddrSpaceCast
Address CreatePointerBitCastOrAddrSpaceCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:173
clang::CodeGen::LValue::isBitField
bool isBitField() const
Definition: CGValue.h:255
clang::CodeGen::CodeGenModule::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenModule.h:708
clang::CodeGen::Address::getType
llvm::PointerType * getType() const
Return the type of the pointer value.
Definition: Address.h:43
clang::ASTContext::getTypeInfoDataSizeInChars
TypeInfoChars getTypeInfoDataSizeInChars(QualType T) const
Definition: ASTContext.cpp:1804
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:187
clang::FunctionDecl::hasTrivialBody
bool hasTrivialBody() const
Returns whether the function has a trivial body that does not require any specific codegen.
Definition: Decl.cpp:2911
CGFunctionInfo.h
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:48
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2870
clang::CXXDtorType
CXXDtorType
C++ destructor types.
Definition: ABI.h:33
clang::DeclaratorContext::Member
@ Member
clang::MemberPointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2834
clang::CodeGen::TEK_Complex
@ TEK_Complex
Definition: CodeGenFunction.h:114
clang::FunctionDecl::getBody
Stmt * getBody(const FunctionDecl *&Definition) const
Retrieve the body (definition) of the function.
Definition: Decl.cpp:2980
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:677
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:7153
clang::CodeGen::CodeGenFunction::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenFunction.h:1945
clang::CXXRecordDecl::getNumBases
unsigned getNumBases() const
Retrieves the number of base classes of this class.
Definition: DeclCXX.h:582
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:2104
clang::CodeGen::CodeGenTypeCache::VoidTy
llvm::Type * VoidTy
void
Definition: CodeGenTypeCache.h:34
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Suffix
unsigned Suffix
Definition: CGCXXABI.h:321
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:2370
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:2671
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:839
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:2656
clang::CodeGen::CodeGenFunction::getCleanupKind
CleanupKind getCleanupKind(QualType::DestructionKind kind)
Definition: CodeGenFunction.h:2011
clang::Qualifiers::hasObjCLifetime
bool hasObjCLifetime() const
Definition: Type.h:334
clang::CodeGen::AggValueSlot::MayOverlap
@ MayOverlap
Definition: CGValue.h:527
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:1996
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:2091
clang::TypeInfoChars::Width
CharUnits Width
Definition: ASTContext.h:176
clang::ASTContext::getRecordType
QualType getRecordType(const RecordDecl *Decl) const
Definition: ASTContext.cpp:4526
clang::CodeGen::CodeGenTypes::arrangeCXXMethodDeclaration
const CGFunctionInfo & arrangeCXXMethodDeclaration(const CXXMethodDecl *MD)
C++ methods have some special rules and also have implicit parameters.
Definition: CGCall.cpp:282
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:844
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:2470
clang::CodeGen::CodeGenTypeCache::PointerWidthInBits
unsigned char PointerWidthInBits
The width of a pointer into the generic address space.
Definition: CodeGenTypeCache.h:86
clang::CXXConstructorDecl::init_end
init_iterator init_end()
Retrieve an iterator past the last initializer.
Definition: DeclCXX.h:2497
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:141
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:2617
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:2205
clang::CodeGen::CodeGenModule::getTypes
CodeGenTypes & getTypes()
Definition: CodeGenModule.h:726
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:2375
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:1753
clang::TagDecl::isUnion
bool isUnion() const
Definition: Decl.h:3473
clang::CodeGen::AggValueSlot::IsDestructed
@ IsDestructed
Definition: CGValue.h:525
clang::CXXRecordDecl::bases
base_class_range bases()
Definition: DeclCXX.h:588
clang::CXXCtorInitializer::isBaseVirtual
bool isBaseVirtual() const
Returns whether the base is virtual or not.
Definition: DeclCXX.h:2284
clang::CodeGen::CodeGenFunction::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenFunction.h:1946
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:254
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1903
clang::CodeGen::CodeGenFunction::CFITypeCheckKind
CFITypeCheckKind
Definition: CodeGenFunction.h:2215
clang::MemberPointerType::getClass
const Type * getClass() const
Definition: Type.h:2848
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:299
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:1464
clang::CodeGen::Address
An aligned address.
Definition: Address.h:24
Base
clang::CodeGen::RValue::isComplex
bool isComplex() const
Definition: CGValue.h:53
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:2318
isMemcpyEquivalentSpecialMember
static bool isMemcpyEquivalentSpecialMember(const CXXMethodDecl *D)
Definition: CGClass.cpp:599
clang::TagDecl::isCompleteDefinition
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3390
clang::CodeGen::CodeGenFunction::SanOpts
SanitizerSet SanOpts
Sanitizers enabled for this function.
Definition: CodeGenFunction.h:483
clang::CodeGen::CodeGenFunction::getEvaluationKind
static TypeEvaluationKind getEvaluationKind(QualType T)
getEvaluationKind - Return the TypeEvaluationKind of QualType T.
Definition: CodeGenFunction.cpp:225
clang::CodeGen::CodeGenFunction::EvaluationOrder
EvaluationOrder
Definition: CodeGenFunction.h:4618
clang::CodeGen::CodeGenFunction::TCK_ConstructorCall
@ TCK_ConstructorCall
Checking the 'this' pointer for a constructor call.
Definition: CodeGenFunction.h:2884
clang::CodeGen::CodeGenFunction::EmitLambdaBlockInvokeBody
void EmitLambdaBlockInvokeBody()
Definition: CGClass.cpp:2906
clang::ast_matchers::arrayType
const AstTypeMatcher< ArrayType > arrayType
Matches all kinds of arrays.
Definition: ASTMatchersInternal.cpp:1018
clang::CodeGen::CodeGenFunction::EmitConstructorBody
void EmitConstructorBody(FunctionArgList &Args)
EmitConstructorBody - Emits the body of the current constructor.
Definition: CGClass.cpp:840
clang::CodeGen::CodeGenFunction::TCK_Upcast
@ TCK_Upcast
Checking the operand of a cast to a base object.
Definition: CodeGenFunction.h:2893
clang::RecordDecl::isAnonymousStructOrUnion
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3889
clang::CodeGen::CodeGenFunction::VPtr::OffsetFromNearestVBase
CharUnits OffsetFromNearestVBase
Definition: CodeGenFunction.h:2190
clang::CXXRecordDecl::vbases
base_class_range vbases()
Definition: DeclCXX.h:605
clang::Decl::isImplicit
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:563
clang::CodeGen::CodeGenFunction::GetAddrOfBlockDecl
Address GetAddrOfBlockDecl(const VarDecl *var)
Definition: CGBlocks.cpp:1245
clang::CodeGen::CodeGenFunction::EmitCall
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee, ReturnValueSlot ReturnValue, const CallArgList &Args, llvm::CallBase **callOrInvoke, SourceLocation Loc)
EmitCall - Generate a call of the given function, expecting the given result type,...
Definition: CGCall.cpp:4558
clang::MemberExpr::getMemberDecl
ValueDecl * getMemberDecl() const
Retrieve the member declaration to which this expression refers.
Definition: Expr.h:3169
clang::CodeGen::CGCallee::forDirect
static CGCallee forDirect(llvm::Constant *functionPtr, const CGCalleeInfo &abstractInfo=CGCalleeInfo())
Definition: CGCall.h:135
clang::interp::Null
bool Null(InterpState &S, CodePtr OpPC)
Definition: Interp.h:818
clang::CodeGen::CodeGenModule::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenModule.h:714
clang::CodeGen::CodeGenFunction::CurGD
GlobalDecl CurGD
CurGD - The GlobalDecl for the current function being compiled.
Definition: CodeGenFunction.h:343
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:1775
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:557
clang::ASTContext::getTargetAddressSpace
unsigned getTargetAddressSpace(QualType T) const
Definition: ASTContext.h:2625
clang::TemplateArgumentList::asArray
ArrayRef< TemplateArgument > asArray() const
Produce this as an array ref.
Definition: DeclTemplate.h:289
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:2651
clang::CodeGen::CodeGenModule::CreateCrossDsoCfiTypeId
llvm::ConstantInt * CreateCrossDsoCfiTypeId(llvm::Metadata *MD)
Generate a cross-DSO type identifier for MD.
Definition: CodeGenModule.cpp:1446
clang::CodeGen::CodeGenTypes::getCGRecordLayout
const CGRecordLayout & getCGRecordLayout(const RecordDecl *)
getCGRecordLayout - Return record layout info for the given record decl.
Definition: CodeGenTypes.cpp:874
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:1404
clang::FunctionDecl::isDestroyingOperatorDelete
bool isDestroyingOperatorDelete() const
Determine whether this is a destroying operator delete.
Definition: Decl.cpp:3147
clang::CodeGen::CodeGenTypes::GetFunctionType
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1580
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:4180
clang::CodeGen::CodeGenModule::getDataLayout
const llvm::DataLayout & getDataLayout() const
Definition: CodeGenModule.h:711
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:7218
clang::CodeGen::ApplyDebugLocation
A scoped helper to set the current debug location to the specified location or preferred location of ...
Definition: CGDebugInfo.h:739
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:635
isInitializerOfDynamicClass
static bool isInitializerOfDynamicClass(const CXXCtorInitializer *BaseInit)
Definition: CGClass.cpp:1270
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:2025
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:167
clang::CodeGen::CodeGenFunction::EHStack
EHScopeStack EHStack
Definition: CodeGenFunction.h:561
ApplyNonVirtualAndVirtualOffset
static Address ApplyNonVirtualAndVirtualOffset(CodeGenFunction &CGF, Address addr, CharUnits nonVirtualOffset, llvm::Value *virtualOffset, const CXXRecordDecl *derivedClass, const CXXRecordDecl *nearestVBase)
Definition: CGClass.cpp:246
P
StringRef P
Definition: ASTMatchersInternal.cpp:563
clang::CodeGen::LValue::isSimple
bool isSimple() const
Definition: CGValue.h:253
clang::CXXConstructorDecl::init_const_iterator
CXXCtorInitializer *const * init_const_iterator
Iterates through the member/base initializer list.
Definition: DeclCXX.h:2477
clang::CodeGen::CodeGenFunction::MakeNaturalAlignAddrLValue
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T)
Definition: CodeGenFunction.cpp:197
clang::CastExpr::path_const_iterator
const typedef CXXBaseSpecifier *const * path_const_iterator
Definition: Expr.h:3465
clang::CodeGen::CodeGenFunction::getTargetHooks
const TargetCodeGenInfo & getTargetHooks() const
Definition: CodeGenFunction.h:1947
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:548
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:3642
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:2441
clang::CodeGen::CodeGenFunction::CFITCK_NVMFCall
@ CFITCK_NVMFCall
Definition: CodeGenFunction.h:2221
clang::CodeGen::CodeGenFunction::EmitVTablePtrCheckForCast
void EmitVTablePtrCheckForCast(QualType T, llvm::Value *Derived, bool MayBeNull, CFITypeCheckKind TCK, SourceLocation Loc)
Derived is the presumed address of an object of type T after a cast.
Definition: CGClass.cpp:2699
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2870
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:2188
clang::syntax::NodeRole::Size
@ Size
false
#define false
Definition: stdbool.h:17
clang::CodeGen::CodeGenFunction::ParamValue::forDirect
static ParamValue forDirect(llvm::Value *value)
Definition: CodeGenFunction.h:3062
clang::CodeGen::CodeGenFunction::EmitDelegatingCXXConstructorCall
void EmitDelegatingCXXConstructorCall(const CXXConstructorDecl *Ctor, const FunctionArgList &Args)
Definition: CGClass.cpp:2410
clang::CXXRecordDecl::getNumVBases
unsigned getNumVBases() const
Retrieves the number of virtual base classes of this class.
Definition: DeclCXX.h:603
clang::CodeGen::Address::getPointer
llvm::Value * getPointer() const
Definition: Address.h:37
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:905
BaseInitializerUsesThis
static bool BaseInitializerUsesThis(ASTContext &C, const Expr *Init)
Definition: CGClass.cpp:551
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:235
LeastDerivedClassWithSameLayout
static const CXXRecordDecl * LeastDerivedClassWithSameLayout(const CXXRecordDecl *RD)
Definition: CGClass.cpp:2642
clang::CodeGen::CodeGenFunction::InitializeVTablePointer
void InitializeVTablePointer(const VPtr &vptr)
Initialize the vtable pointer of the given subobject.
Definition: CGClass.cpp:2480
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:719
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:5609
clang::CodeGen::CodeGenFunction::EmitParmDecl
void EmitParmDecl(const VarDecl &D, ParamValue Arg, unsigned ArgNo)
EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
Definition: CGDecl.cpp:2420
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3880
clang::CodeGen::AggValueSlot::IsNotAliased
@ IsNotAliased
Definition: CGValue.h:524
clang::CodeGen::CGCXXABI::AddedStructorArgCounts
Similar to AddedStructorArgs, but only notes the number of additional arguments.
Definition: CGCXXABI.h:319
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:1190
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1860
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:228
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:196
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:4036
clang::CodeGen::CodeGenFunction::EmitAsanPrologueOrEpilogue
void EmitAsanPrologueOrEpilogue(bool Prologue)
Definition: CGClass.cpp:778
clang::CodeGen::CGBlockInfo::getBlockDecl
const BlockDecl * getBlockDecl() const
Definition: CGBlocks.h:276
clang::CodeGen::CodeGenModule::getVTables
CodeGenVTables & getVTables()
Definition: CodeGenModule.h:728
Value
Value
Definition: UninitializedValues.cpp:102
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:89
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:1983
clang::CodeGen::CodeGenFunction::CFITCK_DerivedCast
@ CFITCK_DerivedCast
Definition: CodeGenFunction.h:2218
clang::CodeGen::CodeGenFunction::LexicalScope
Definition: CodeGenFunction.h:871
clang::CXXConstructorDecl::getInheritedConstructor
InheritedConstructor getInheritedConstructor() const
Get the constructor that this inheriting constructor is based on.
Definition: DeclCXX.h:2629
clang::CodeGen::CodeGenFunction::BuildFunctionArgList
QualType BuildFunctionArgList(GlobalDecl GD, FunctionArgList &Args)
Definition: CodeGenFunction.cpp:1241
clang::CodeGen::CGFunctionInfo::usesInAlloca
bool usesInAlloca() const
Return true if this function uses inalloca arguments.
Definition: CGFunctionInfo.h:703
clang::CodeGen::CodeGenFunction::VPtr::VTableClass
const CXXRecordDecl * VTableClass
Definition: CodeGenFunction.h:2191
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:575
clang::CodeGen::CGCallee
All available information about a concrete callee.
Definition: CGCall.h:67
clang::CodeGen::FunctionArgList
FunctionArgList - Type for representing both the decl and type of parameters to a function.
Definition: CGCall.h:358
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:2333
clang::CodeGen::CGFunctionInfo::getReturnInfo
ABIArgInfo & getReturnInfo()
Definition: CGFunctionInfo.h:689
clang::QualType::DestructionKind
DestructionKind
Definition: Type.h:1190
clang::CodeGen::CodeGenFunction::getTypes
CodeGenTypes & getTypes() const
Definition: CodeGenFunction.h:1902
clang::CXXConstructorDecl::init_begin
init_iterator init_begin()
Retrieve an iterator to the first initializer.
Definition: DeclCXX.h:2488
clang::CodeGen::AggValueSlot
An aggregate value slot.
Definition: CGValue.h:471
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:221
clang::Qualifiers::hasVolatile
bool hasVolatile() const
Definition: Type.h:267
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:2866
clang::CodeGen::CodeGenFunction::EmitCXXConstructorCall
void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, AggValueSlot ThisAVS, const CXXConstructExpr *E)
Definition: CGClass.cpp:2053
clang::TemplateArgumentList
A template argument list.
Definition: DeclTemplate.h:235
TargetBuiltins.h
clang::CodeGen::NormalAndEHCleanup
@ NormalAndEHCleanup
Definition: EHScopeStack.h:86
clang::NamedDecl::getQualifiedNameAsString
std::string getQualifiedNameAsString() const
Definition: Decl.cpp:1543
clang::CodeGen::CodeGenFunction::LoadCXXVTT
llvm::Value * LoadCXXVTT()
LoadCXXVTT - Load the VTT parameter to base constructors/destructors have virtual bases.
Definition: CodeGenFunction.h:2734
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:234
clang::CodeGen::Address::getElementType
llvm::Type * getElementType() const
Return the type of the values stored in this address.
Definition: Address.h:51
clang::CodeGen::CodeGenFunction::MakeAddrLValue
LValue MakeAddrLValue(Address Addr, QualType T, AlignmentSource Source=AlignmentSource::Type)
Definition: CodeGenFunction.h:2408
clang::CXXRecordDecl::hasTrivialDestructor
bool hasTrivialDestructor() const
Determine whether this class has a trivial destructor (C++ [class.dtor]p3)
Definition: DeclCXX.h:1310
clang::CodeGen::CodeGenModule::DecorateInstructionWithTBAA
void DecorateInstructionWithTBAA(llvm::Instruction *Inst, TBAAAccessInfo TBAAInfo)
DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
Definition: CodeGenModule.cpp:886
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:166
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:4791
clang::CXXRecordDecl::getDestructor
CXXDestructorDecl * getDestructor() const
Returns the destructor decl for this class.
Definition: DeclCXX.cpp:1878
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:58
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2818
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:527
clang::CodeGen::AggValueSlot::Overlap_t
Overlap_t
Definition: CGValue.h:527
CGCXXABI.h
clang::CodeGen::CodeGenFunction::FnRetTy
QualType FnRetTy
Definition: CodeGenFunction.h:325
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:59
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:266
clang::interp::This
bool This(InterpState &S, CodePtr OpPC)
Definition: Interp.h:827
clang::DeclaratorContext::TypeName
@ TypeName
clang::CodeGen::TEK_Scalar
@ TEK_Scalar
Definition: CodeGenFunction.h:113
CGBlocks.h
clang::CodeGen::CodeGenFunction::CFITCK_NVCall
@ CFITCK_NVCall
Definition: CodeGenFunction.h:2217
clang::CodeGen::CodeGenFunction::CurFn
llvm::Function * CurFn
Definition: CodeGenFunction.h:326
clang::CodeGen::CleanupKind
CleanupKind
Definition: EHScopeStack.h:77
clang::UnaryOperator::getSubExpr
Expr * getSubExpr() const
Definition: Expr.h:2140
clang
Dataflow Directional Tag Classes.
Definition: CalledOnceCheck.h:17
clang::IndirectFieldDecl
Represents a field injected from an anonymous union/struct into the parent scope.
Definition: Decl.h:3046
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:2298
clang::CodeGen::CGCXXABI::EmitCtorCompleteObjectHandler
virtual llvm::BasicBlock * EmitCtorCompleteObjectHandler(CodeGenFunction &CGF, const CXXRecordDecl *RD)
Definition: CGCXXABI.cpp:255
clang::CodeGen::RValue::get
static RValue get(llvm::Value *V)
Definition: CGValue.h:86
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:4024
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2400
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:2046
clang::CodeGenOptions::SanitizeTrap
SanitizerSet SanitizeTrap
Set of sanitizer checks that trap rather than diagnose.
Definition: CodeGenOptions.h:350
clang::CodeGen::CodeGenFunction::EvaluationOrder::ForceLeftToRight
@ ForceLeftToRight
! Language semantics require left-to-right evaluation.
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:68
clang::UnaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:2135
clang::CodeGen::AggValueSlot::getAddress
Address getAddress() const
Definition: CGValue.h:615
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:857
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:6273
clang::CXXRecordDecl::bases_begin
base_class_iterator bases_begin()
Definition: DeclCXX.h:595
clang::CodeGen::CodeGenFunction::ParamValue
Definition: CodeGenFunction.h:3057
clang::transformer::callArgs
RangeSelector callArgs(std::string ID)
Definition: RangeSelector.cpp:289
clang::CXXBaseSpecifier
Represents a base class of a C++ class.
Definition: DeclCXX.h:146
clang::CXXRecordDecl::hasDefinition
bool hasDefinition() const
Definition: DeclCXX.h:541
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3804
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:59
clang::ConstEvaluatedExprVisitor
ConstEvaluatedExprVisitor - This class visits 'const Expr *'s.
Definition: EvaluatedExprVisitor.h:120
clang::CodeGen::CodeGenFunction::EnterCXXTryStmt
void EnterCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock=false)
Definition: CGException.cpp:584
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:1165
clang::CodeGen::AggValueSlot::getQualifiers
Qualifiers getQualifiers() const
Definition: CGValue.h:590
clang::GlobalDecl::getCtorType
CXXCtorType getCtorType() const
Definition: GlobalDecl.h:104
clang::Dtor_Deleting
@ Dtor_Deleting
Deleting dtor.
Definition: ABI.h:34
clang::CodeGen::CodeGenFunction::getVTablePointers
VPtrsVector getVTablePointers(const CXXRecordDecl *VTableClass)
Definition: CGClass.cpp:2535
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:292
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:2252
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Prefix
unsigned Prefix
Definition: CGCXXABI.h:320
clang::FunctionDecl::isVariadic
bool isVariadic() const
Whether this function is variadic.
Definition: Decl.cpp:2868
clang::CodeGen::RValue::isScalar
bool isScalar() const
Definition: CGValue.h:52
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:1955
clang::CompoundStmt::body
body_range body()
Definition: Stmt.h:1431
clang::SanitizerSet::set
void set(SanitizerMask K, bool Value)
Enable or disable a certain (single) sanitizer.
Definition: Sanitizers.h:163
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:2187
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:3189
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:102
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:3542
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:1279
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:3086
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:1286
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6420
clang::CXXRecordDecl::isDynamicClass
bool isDynamicClass() const
Definition: DeclCXX.h:554
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4618
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:3179
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:467
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:1158
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:228
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:1840
clang::FunctionDecl::isFunctionTemplateSpecialization
bool isFunctionTemplateSpecialization() const
Determine whether this function is a function template specialization.
Definition: Decl.h:2646
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:1541
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:400
clang::CodeGen::CodeGenFunction::ParamValue::forIndirect
static ParamValue forIndirect(Address addr)
Definition: CodeGenFunction.h:3065
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:218
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:655
clang::CodeGen::CallArg
Definition: CGCall.h:219
clang::FunctionDecl::getBuiltinID
unsigned getBuiltinID(bool ConsiderWrapperFunctions=false) const
Returns a value indicating whether this function corresponds to a builtin function.
Definition: Decl.cpp:3263
clang::CodeGen::CodeGenFunction::InlinedInheritingConstructorScope
Definition: CodeGenFunction.h:1601
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:3068
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:1022
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:3652
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:730
clang::CodeGen::ReturnValueSlot::isNull
bool isNull() const
Definition: CGCall.h:378
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:1045
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:1202
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:2162
clang::CodeGen::CodeGenModule::getIntrinsic
llvm::Function * getIntrinsic(unsigned IID, ArrayRef< llvm::Type * > Tys=None)
Definition: CodeGenModule.cpp:4937
clang::CodeGen::AggValueSlot::IsNotSanitizerChecked
@ IsNotSanitizerChecked
Definition: CGValue.h:529
clang::FunctionDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2448
clang::CodeGen::CodeGenModule::DecorateInstructionWithInvariantGroup
void DecorateInstructionWithInvariantGroup(llvm::Instruction *I, const CXXRecordDecl *RD)
Adds !invariant.barrier !tag to instruction.
Definition: CodeGenModule.cpp:892
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:1794
clang::CodeGen::CallArgList
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:264
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:393
clang::CodeGen::CodeGenFunction::CFITCK_UnrelatedCast
@ CFITCK_UnrelatedCast
Definition: CodeGenFunction.h:2219
clang::CodeGen::CodeGenFunction::EmitAggregateCopyCtor
void EmitAggregateCopyCtor(LValue Dest, LValue Src, AggValueSlot::Overlap_t MayOverlap)
Definition: CodeGenFunction.h:2623
clang::CodeGen::CodeGenFunction::CFITCK_VMFCall
@ CFITCK_VMFCall
Definition: CodeGenFunction.h:2222
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1821
clang::CodeGen::AggValueSlot::IsNotZeroed
@ IsNotZeroed
Definition: CGValue.h:526
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3816
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2730
clang::ASTContext::getNoSanitizeList
const NoSanitizeList & getNoSanitizeList() const
Definition: ASTContext.h:719
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:520
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:4432
clang::CodeGen::CodeGenFunction::InitializeVTablePointers
void InitializeVTablePointers(const CXXRecordDecl *ClassDecl)
Definition: CGClass.cpp:2603
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:350
clang::CodeGen::CodeGenModule::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenModule.h:720
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:709
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:1916
clang::SanitizerMask
Definition: Sanitizers.h:30
clang::CXXMethodDecl::isVirtual
bool isVirtual() const
Definition: DeclCXX.h:1982
clang::CodeGen::ApplyInlineDebugLocation
A scoped helper to set the current debug location to an inlined location.
Definition: CGDebugInfo.h:794
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:321
clang::CodeGen::RValue::getAggregateAddress
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:71
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:2972
clang::CodeGen::CodeGenFunction::ExitCXXTryStmt
void ExitCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock=false)
Definition: CGException.cpp:1149
clang::CodeGen::CGBuilderTy::CreateLoad
llvm::LoadInst * CreateLoad(Address Addr, const llvm::Twine &Name="")
Definition: CGBuilder.h:68
clang::CodeGen::LValue::getBitFieldAddress
Address getBitFieldAddress() const
Definition: CGValue.h:377
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:2053
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1937
clang::CodeGen::CodeGenFunction::ReturnValue
Address ReturnValue
ReturnValue - The temporary alloca to hold the return value.
Definition: CodeGenFunction.h:354
clang::CodeGen::CodeGenFunction::CFITCK_ICall
@ CFITCK_ICall
Definition: CodeGenFunction.h:2220
clang::CodeGen::CGCXXABI::getSrcArgforCopyCtor
virtual size_t getSrcArgforCopyCtor(const CXXConstructorDecl *, FunctionArgList &Args) const =0
clang::CodeGen::AggValueSlot::DoesNotOverlap
@ DoesNotOverlap
Definition: CGValue.h:527
clang::CXXDestructorDecl::getOperatorDeleteThisArg
Expr * getOperatorDeleteThisArg() const
Definition: DeclCXX.h:2694