21 #include "llvm/IR/IntrinsicInst.h" 22 #include "llvm/Support/Format.h" 23 #include "llvm/Transforms/Utils/Cloning.h" 27 using namespace clang;
28 using namespace CodeGen;
31 : CGM(CGM), VTContext(CGM.getContext().getVTableContext()) {}
35 return GetOrCreateLLVMFunction(Name, FnTy, GD,
true,
40 llvm::Function *ThunkFn,
bool ForVTable,
50 ThunkFn->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass);
51 ThunkFn->setDSOLocal(
true);
55 ThunkFn->setComdat(CGM.
getModule().getOrInsertComdat(ThunkFn->getName()));
63 (isa<PointerType>(typeL) && isa<PointerType>(typeR)) ||
64 (isa<ReferenceType>(typeL) && isa<ReferenceType>(typeR))));
74 llvm::BasicBlock *AdjustNull =
nullptr;
75 llvm::BasicBlock *AdjustNotNull =
nullptr;
76 llvm::BasicBlock *AdjustEnd =
nullptr;
86 CGF.
Builder.CreateCondBr(IsNull, AdjustNull, AdjustNotNull);
93 Address(ReturnValue, ClassAlign),
97 CGF.
Builder.CreateBr(AdjustEnd);
99 CGF.
Builder.CreateBr(AdjustEnd);
102 llvm::PHINode *PHI = CGF.
Builder.CreatePHI(ReturnValue->getType(), 2);
103 PHI->addIncoming(ReturnValue, AdjustNotNull);
104 PHI->addIncoming(llvm::Constant::getNullValue(ReturnValue->getType()),
118 llvm::ValueToValueMapTy &VMap) {
120 auto *DIS = Fn->getSubprogram();
123 auto *NewDIS = DIS->replaceWithDistinct(DIS->clone());
124 VMap.MD()[DIS].reset(NewDIS);
128 for (
auto &BB : Fn->getBasicBlockList()) {
130 if (
auto *DII = dyn_cast<llvm::DbgVariableIntrinsic>(&I)) {
131 auto *DILocal = DII->getVariable();
132 if (!DILocal->isResolved())
161 QualType ResultType = FPT->getReturnType();
167 llvm::Function *BaseFn = cast<llvm::Function>(Callee);
170 llvm::ValueToValueMapTy VMap;
175 llvm::Function *NewFn = llvm::CloneFunction(BaseFn, VMap);
176 Fn->replaceAllUsesWith(NewFn);
178 Fn->eraseFromParent();
185 llvm::Function::arg_iterator AI = Fn->arg_begin();
192 llvm::BasicBlock *EntryBB = &Fn->front();
193 llvm::BasicBlock::iterator ThisStore =
194 std::find_if(EntryBB->begin(), EntryBB->end(), [&](llvm::Instruction &I) {
195 return isa<llvm::StoreInst>(I) &&
198 assert(ThisStore != EntryBB->end() &&
199 "Store of this should be in entry block?");
201 Builder.SetInsertPoint(&*ThisStore);
204 ThisStore->setOperand(0, AdjustedThisPtr);
208 for (llvm::BasicBlock &BB : *Fn) {
209 llvm::Instruction *T = BB.getTerminator();
210 if (isa<llvm::ReturnInst>(T)) {
212 T->eraseFromParent();
213 Builder.SetInsertPoint(&BB);
226 bool IsUnprototyped) {
227 assert(!CurGD.getDecl() &&
"CurGD was already set!");
229 CurFuncIsThunk =
true;
239 ResultType = ThisType;
250 if (!IsUnprototyped) {
253 if (isa<CXXDestructorDecl>(MD))
260 StartFunction(
GlobalDecl(), ResultType, Fn, FnInfo, FunctionArgs,
267 CXXThisValue = CXXABIThisValue;
275 CurCodeDecl =
nullptr;
276 CurFuncDecl =
nullptr;
283 bool IsUnprototyped) {
284 assert(isa<CXXMethodDecl>(CurGD.getDecl()) &&
285 "Please use a new CGF for this thunk");
286 const CXXMethodDecl *MD = cast<CXXMethodDecl>(CurGD.getDecl());
291 *
this, LoadCXXThisAddress(), Thunk->
This)
294 if (CurFnInfo->usesInAlloca() || IsUnprototyped) {
301 MD,
"return-adjusting thunk with incomplete parameter type");
304 MD,
"non-trivial argument copy for return-adjusting thunk");
306 EmitMustTailThunk(CurGD, AdjustedThisPtr, Callee);
315 if (isa<CXXDestructorDecl>(MD))
319 unsigned PrefixArgs = CallArgs.size() - 1;
330 assert(CallFnInfo.getRegParm() == CurFnInfo->getRegParm() &&
331 CallFnInfo.isNoReturn() == CurFnInfo->isNoReturn() &&
332 CallFnInfo.getCallingConvention() == CurFnInfo->getCallingConvention());
333 assert(isa<CXXDestructorDecl>(MD) ||
334 similar(CallFnInfo.getReturnInfo(), CallFnInfo.getReturnType(),
335 CurFnInfo->getReturnInfo(), CurFnInfo->getReturnType()));
336 assert(CallFnInfo.arg_size() == CurFnInfo->arg_size());
337 for (
unsigned i = 0, e = CurFnInfo->arg_size();
i != e; ++
i)
338 assert(
similar(CallFnInfo.arg_begin()[
i].info,
339 CallFnInfo.arg_begin()[
i].type,
340 CurFnInfo->arg_begin()[
i].info,
341 CurFnInfo->arg_begin()[
i].type));
356 llvm::CallBase *CallOrInvoke;
358 CallArgs, &CallOrInvoke);
363 else if (llvm::CallInst* Call = dyn_cast<llvm::CallInst>(CallOrInvoke))
364 Call->setTailCallKind(llvm::CallInst::TCK_Tail);
371 AutoreleaseResult =
false;
378 llvm::FunctionCallee Callee) {
384 for (llvm::Argument &A : CurFn->args())
388 const ABIArgInfo &ThisAI = CurFnInfo->arg_begin()->info;
390 const ABIArgInfo &RetAI = CurFnInfo->getReturnInfo();
392 llvm::Type *ThisType = Args[ThisArgNo]->getType();
393 if (ThisType != AdjustedThisPtr->getType())
394 AdjustedThisPtr = Builder.CreateBitCast(AdjustedThisPtr, ThisType);
395 Args[ThisArgNo] = AdjustedThisPtr;
397 assert(ThisAI.
isInAlloca() &&
"this is passed directly or inalloca");
398 Address ThisAddr = GetAddrOfLocalVar(CXXABIThisDecl);
399 llvm::Type *ThisType = ThisAddr.getElementType();
400 if (ThisType != AdjustedThisPtr->getType())
401 AdjustedThisPtr = Builder.CreateBitCast(AdjustedThisPtr, ThisType);
402 Builder.CreateStore(AdjustedThisPtr, ThisAddr);
407 llvm::CallInst *Call = Builder.CreateCall(Callee, Args);
408 Call->setTailCallKind(llvm::CallInst::TCK_MustTail);
412 llvm::AttributeList Attrs;
415 Call->setAttributes(Attrs);
416 Call->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv));
418 if (Call->getType()->isVoidTy())
419 Builder.CreateRetVoid();
421 Builder.CreateRet(Call);
425 EmitBlock(createBasicBlock());
432 bool IsUnprototyped) {
433 StartThunk(Fn, GD, FnInfo, IsUnprototyped);
441 Ty = llvm::StructType::get(getLLVMContext());
449 Callee = llvm::ConstantExpr::getBitCast(Callee, Fn->getType());
452 EmitCallAndReturnForThunk(llvm::FunctionCallee(Fn->getFunctionType(), Callee),
453 &Thunk, IsUnprototyped);
457 bool IsUnprototyped,
bool ForVTable) {
474 llvm::Constant *CodeGenVTables::maybeEmitThunk(
GlobalDecl GD,
484 llvm::raw_svector_ostream Out(Name);
490 llvm::Constant *Thunk = CGM.
GetAddrOfThunk(Name, ThunkVTableTy, GD);
507 llvm::Function *ThunkFn = cast<llvm::Function>(Thunk->stripPointerCasts());
508 if (ThunkFn->getFunctionType() != ThunkFnTy) {
509 llvm::GlobalValue *OldThunkFn = ThunkFn;
511 assert(OldThunkFn->isDeclaration() &&
"Shouldn't replace non-declaration");
514 OldThunkFn->setName(StringRef());
520 if (!OldThunkFn->use_empty()) {
521 llvm::Constant *NewPtrForOldDecl =
522 llvm::ConstantExpr::getBitCast(ThunkFn, OldThunkFn->getType());
523 OldThunkFn->replaceAllUsesWith(NewPtrForOldDecl);
527 OldThunkFn->eraseFromParent();
531 bool UseAvailableExternallyLinkage = ForVTable && ABIHasKeyFunctions;
533 if (!ThunkFn->isDeclaration()) {
534 if (!ABIHasKeyFunctions || UseAvailableExternallyLinkage) {
548 ThunkFn->addFnAttr(
"thunk");
552 if (!IsUnprototyped && ThunkFn->isVarArg()) {
558 if (UseAvailableExternallyLinkage)
582 if (!ThunkInfoVector)
585 for (
const ThunkInfo& Thunk : *ThunkInfoVector)
586 maybeEmitThunk(GD, Thunk,
false);
589 void CodeGenVTables::addVTableComponent(
591 unsigned idx, llvm::Constant *rtti,
unsigned &nextVTableThunkIndex) {
594 auto addOffsetConstant = [&](
CharUnits offset) {
595 builder.add(llvm::ConstantExpr::getIntToPtr(
596 llvm::ConstantInt::get(CGM.
PtrDiffTy, offset.getQuantity()),
600 switch (component.getKind()) {
602 return addOffsetConstant(component.getVCallOffset());
605 return addOffsetConstant(component.getVBaseOffset());
608 return addOffsetConstant(component.getOffsetToTop());
611 return builder.add(llvm::ConstantExpr::getBitCast(rtti, CGM.
Int8PtrTy));
619 switch (component.getKind()) {
621 llvm_unreachable(
"Unexpected vtable component kind");
623 GD = component.getFunctionDecl();
642 ? MD->
hasAttr<CUDADeviceAttr>()
643 : (MD->
hasAttr<CUDAHostAttr>() || !MD->
hasAttr<CUDADeviceAttr>());
645 return builder.addNullPointer(CGM.
Int8PtrTy);
649 auto getSpecialVirtualFn = [&](StringRef
name) {
650 llvm::FunctionType *fnTy =
651 llvm::FunctionType::get(CGM.
VoidTy,
false);
652 llvm::Constant *fn = cast<llvm::Constant>(
654 if (
auto f = dyn_cast<llvm::Function>(fn))
655 f->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
656 return llvm::ConstantExpr::getBitCast(fn, CGM.
Int8PtrTy);
659 llvm::Constant *fnPtr;
662 if (cast<CXXMethodDecl>(GD.
getDecl())->isPure()) {
666 fnPtr = PureVirtualFn;
669 }
else if (cast<CXXMethodDecl>(GD.
getDecl())->isDeleted()) {
670 if (!DeletedVirtualFn)
673 fnPtr = DeletedVirtualFn;
676 }
else if (nextVTableThunkIndex < layout.
vtable_thunks().size() &&
678 auto &thunkInfo = layout.
vtable_thunks()[nextVTableThunkIndex].second;
680 nextVTableThunkIndex++;
681 fnPtr = maybeEmitThunk(GD, thunkInfo,
true);
689 fnPtr = llvm::ConstantExpr::getBitCast(fnPtr, CGM.
Int8PtrTy);
695 return builder.addNullPointer(CGM.
Int8PtrTy);
698 llvm_unreachable(
"Unexpected vtable component kind");
712 llvm::Constant *rtti) {
713 unsigned nextVTableThunkIndex = 0;
718 for (
unsigned i = thisIndex;
i != nextIndex; ++
i) {
719 addVTableComponent(vtableElem, layout,
i, rtti, nextVTableThunkIndex);
721 vtableElem.finishAndAddTo(builder);
725 llvm::GlobalVariable *
729 llvm::GlobalVariable::LinkageTypes
Linkage,
730 VTableAddressPointsMapTy& AddressPoints) {
732 DI->completeClassData(Base.
getBase());
734 std::unique_ptr<VTableLayout> VTLayout(
739 AddressPoints = VTLayout->getAddressPoints();
743 llvm::raw_svector_ostream Out(OutName);
747 StringRef Name = OutName.str();
756 if (Linkage == llvm::GlobalVariable::AvailableExternallyLinkage)
759 unsigned Align = CGM.
getDataLayout().getABITypeAlignment(VTType);
762 llvm::GlobalVariable *VTable =
766 VTable->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
775 components.finishAndSetAsInitializer(VTable);
779 assert(!VTable->isDeclaration() &&
"Shouldn't set properties on declaration");
796 llvm::GlobalVariable::LinkageTypes
804 if (keyFunction && !RD->
hasAttr<DLLImportAttr>()) {
809 keyFunction = cast<CXXMethodDecl>(def);
814 assert((def || CodeGenOpts.OptimizationLevel > 0 ||
816 "Shouldn't query vtable linkage without key function, " 817 "optimizations, or debug info");
818 if (!def && CodeGenOpts.OptimizationLevel > 0)
819 return llvm::GlobalVariable::AvailableExternallyLinkage;
823 llvm::GlobalVariable::LinkOnceODRLinkage :
830 llvm::GlobalVariable::LinkOnceODRLinkage :
835 llvm::GlobalVariable::WeakODRLinkage :
839 llvm_unreachable(
"Should not have been asked to emit this");
848 llvm::GlobalVariable::LinkageTypes DiscardableODRLinkage =
849 llvm::GlobalValue::LinkOnceODRLinkage;
850 llvm::GlobalVariable::LinkageTypes NonDiscardableODRLinkage =
851 llvm::GlobalValue::WeakODRLinkage;
852 if (RD->
hasAttr<DLLExportAttr>()) {
854 DiscardableODRLinkage = NonDiscardableODRLinkage;
855 }
else if (RD->
hasAttr<DLLImportAttr>()) {
857 DiscardableODRLinkage = llvm::GlobalVariable::AvailableExternallyLinkage;
858 NonDiscardableODRLinkage = llvm::GlobalVariable::AvailableExternallyLinkage;
865 return DiscardableODRLinkage;
870 if (getTarget().getCXXABI().isMicrosoft())
871 return DiscardableODRLinkage;
873 ? llvm::GlobalVariable::AvailableExternallyLinkage
877 return NonDiscardableODRLinkage;
880 llvm_unreachable(
"Invalid TemplateSpecializationKind!");
890 VTables.GenerateClassData(theClass);
896 DI->completeClassData(RD);
915 assert(RD->
isDynamicClass() &&
"Non-dynamic classes have no VTable.");
942 return !keyFunction->
hasBody();
961 void CodeGenModule::EmitDeferredVTables() {
965 size_t savedSize = DeferredVTables.size();
970 VTables.GenerateClassData(RD);
971 else if (shouldOpportunisticallyEmitVTables())
972 OpportunisticVTables.push_back(RD);
974 assert(savedSize == DeferredVTables.size() &&
975 "deferred extra vtables during vtable emission?");
976 DeferredVTables.clear();
984 if (RD->
hasAttr<LTOVisibilityPublicAttr>() || RD->
hasAttr<UuidAttr>())
987 if (getTriple().isOSBinFormatCOFF()) {
995 if (getCodeGenOpts().LTOVisibilityPublicStd) {
998 auto *D = cast<Decl>(DC);
1000 if (isa<TranslationUnitDecl>(DC->getRedeclContext())) {
1001 if (
auto *ND = dyn_cast<NamespaceDecl>(D))
1003 if (II->isStr(
"std") || II->isStr(
"stdext"))
1015 if (!getCodeGenOpts().LTOUnit)
1021 typedef std::pair<const CXXRecordDecl *, unsigned> AddressPoint;
1022 std::vector<AddressPoint> AddressPoints;
1024 AddressPoints.push_back(std::make_pair(
1026 AP.second.AddressPointIndex));
1029 llvm::sort(AddressPoints, [
this](
const AddressPoint &AP1,
1030 const AddressPoint &AP2) {
1035 llvm::raw_string_ostream O1(S1);
1036 getCXXABI().getMangleContext().mangleTypeName(
1037 QualType(AP1.first->getTypeForDecl(), 0), O1);
1041 llvm::raw_string_ostream O2(S2);
1042 getCXXABI().getMangleContext().mangleTypeName(
1043 QualType(AP2.first->getTypeForDecl(), 0), O2);
1051 return AP1.second < AP2.second;
1055 for (
auto AP : AddressPoints) {
1057 AddVTableTypeMetadata(VTable, PointerWidth * AP.second, AP.first);
1063 for (
unsigned I = 0; I != Comps.size(); ++I) {
1066 llvm::Metadata *MD = CreateMetadataIdentifierForVirtualMemPtrType(
1068 Comps[I].getFunctionDecl()->getType(),
1070 VTable->addTypeMetadata((PointerWidth * I).getQuantity(), MD);
const llvm::DataLayout & getDataLayout() const
size_t getNumVTables() const
ReturnValueSlot - Contains the address where the return value of a function can be stored...
static const Decl * getCanonicalDecl(const Decl *D)
Represents a function declaration or definition.
External linkage, which indicates that the entity can be referred to from other translation units...
void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info, llvm::Function *F)
Set the LLVM function attributes (sext, zext, etc).
A (possibly-)qualified type.
bool ReturnTypeUsesSRet(const CGFunctionInfo &FI)
Return true iff the given type uses 'sret' when used as a return type.
CodeGenTypes & getTypes()
const CodeGenOptions & getCodeGenOpts() const
const AddressPointsMapTy & getAddressPoints() const
virtual void EmitReturnFromThunk(CodeGenFunction &CGF, RValue RV, QualType ResultType)
llvm::LLVMContext & getLLVMContext()
CXXDtorType getDtorType() const
virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy, FunctionArgList &Params)=0
Insert any ABI-specific implicit parameters into the parameter list for a function.
The standard implementation of ConstantInitBuilder used in Clang.
CharUnits getClassPointerAlignment(const CXXRecordDecl *CD)
Returns the assumed alignment of an opaque pointer to the given class.
FunctionType - C99 6.7.5.3 - Function Declarators.
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
unsigned getNumVBases() const
Retrieves the number of virtual base classes of this class.
QualType getThisType() const
Return the type of the this pointer.
virtual const ThunkInfoVectorTy * getThunkInfo(GlobalDecl GD)
virtual llvm::Value * performThisAdjustment(CodeGenFunction &CGF, Address This, const ThisAdjustment &TA)=0
void setFunctionLinkage(GlobalDecl GD, llvm::Function *F)
virtual StringRef GetDeletedVirtualCallName()=0
Gets the deleted virtual member call name.
const TargetInfo & getTargetInfo() const
llvm::Function * GenerateVarArgsThunk(llvm::Function *Fn, const CGFunctionInfo &FnInfo, GlobalDecl GD, const ThunkInfo &Thunk)
bool isFuncTypeConvertible(const FunctionType *FT)
isFuncTypeConvertible - Utility to check whether a function type can be converted to an LLVM type (i...
bool HasHiddenLTOVisibility(const CXXRecordDecl *RD)
Returns whether the given record has hidden LTO visibility and therefore may participate in (single-m...
void StartThunk(llvm::Function *Fn, GlobalDecl GD, const CGFunctionInfo &FnInfo, bool IsUnprototyped)
Objects with "hidden" visibility are not seen by the dynamic linker.
const T * getAs() const
Member-template getAs<specific type>'.
Visibility getVisibility() const
CGDebugInfo * getModuleDebugInfo()
bool supportsCOMDAT() const
This class gathers all debug information during compilation and is responsible for emitting to llvm g...
QualType getMemberPointerType(QualType T, const Type *Cls) const
Return the uniqued reference to the type for a member pointer to the specified type in the specified ...
llvm::Value * getPointer() const
Represents a parameter to a function.
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
void add(RValue rvalue, QualType type)
CharUnits getBaseOffset() const
getBaseOffset - Returns the base class offset.
uint64_t getPointerWidth(unsigned AddrSpace) const
Return the width of pointers on this target, for the specified address space.
One of these records is kept for each identifier that is lexed.
TargetCXXABI getCXXABI() const
Get the C++ ABI currently in use.
void generateThunk(llvm::Function *Fn, const CGFunctionInfo &FnInfo, GlobalDecl GD, const ThunkInfo &Thunk, bool IsUnprototyped)
Generate a thunk for the given method.
Indirect - Pass the argument indirectly via a hidden pointer with the specified alignment (0 indicate...
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
static bool shouldEmitAvailableExternallyVTable(const CodeGenModule &CGM, const CXXRecordDecl *RD)
bool isReferenceType() const
static void resolveTopLevelMetadata(llvm::Function *Fn, llvm::ValueToValueMapTy &VMap)
This function clones a function's DISubprogram node and enters it into a value map with the intent th...
llvm::Type * getVTableType(const VTableLayout &layout)
Returns the type of a vtable with the given layout.
The this pointer adjustment as well as an optional return adjustment for a thunk. ...
static ApplyDebugLocation CreateArtificial(CodeGenFunction &CGF)
Apply TemporaryLocation if it is valid.
ArrayRef< ParmVarDecl * > parameters() const
virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF)=0
Emit the ABI-specific prolog for the function.
ArrayRef< VTableComponent > vtable_components() const
virtual void emitVTableDefinitions(CodeGenVTables &CGVT, const CXXRecordDecl *RD)=0
Emits the VTable definitions required for the given record type.
CharUnits - This is an opaque type for sizes expressed in character units.
virtual bool hasMostDerivedReturn(GlobalDecl GD) const
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info, CGCalleeInfo CalleeInfo, llvm::AttributeList &Attrs, unsigned &CallingConv, bool AttrOnCallSite)
Get the LLVM attributes and calling convention to use for a particular function type.
ABIArgInfo - Helper class to encapsulate information about how a specific C type should be passed to ...
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...
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
llvm::BasicBlock * createBasicBlock(const Twine &name="", llvm::Function *parent=nullptr, llvm::BasicBlock *before=nullptr)
createBasicBlock - Create an LLVM basic block.
ItaniumVTableContext & getItaniumVTableContext()
static bool shouldEmitVTableThunk(CodeGenModule &CGM, const CXXMethodDecl *MD, bool IsUnprototyped, bool ForVTable)
const CGFunctionInfo & arrangeGlobalDeclaration(GlobalDecl GD)
param_iterator param_begin()
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Represents a prototype with parameter type info, e.g.
bool isDynamicClass() const
ArrayBuilder beginArray(llvm::Type *eltTy=nullptr)
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine whether this particular class is a specialization or instantiation of a class template or m...
RValue - This trivial value class is used to represent the result of an expression that is evaluated...
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
bool isVTableExternal(const CXXRecordDecl *RD)
At this point in the translation unit, does it appear that can we rely on the vtable being defined el...
virtual bool HasThisReturn(GlobalDecl GD) const
Returns true if the given constructor or destructor is one of the kinds that the ABI says returns 'th...
bool hasKeyFunctions() const
Does this ABI use key functions? If so, class data such as the vtable is emitted with strong linkage ...
static void setThunkProperties(CodeGenModule &CGM, const ThunkInfo &Thunk, llvm::Function *ThunkFn, bool ForVTable, GlobalDecl GD)
static bool similar(const ABIArgInfo &infoL, CanQualType typeL, const ABIArgInfo &infoR, CanQualType typeR)
const T * castAs() const
Member-template castAs<specific type>.
static CGCallee forDirect(llvm::Constant *functionPtr, const CGCalleeInfo &abstractInfo=CGCalleeInfo())
Represents a C++ destructor within a class.
virtual bool exportThunk()=0
QualType getTagDeclType(const TagDecl *Decl) const
Return the unique reference to the type for the specified TagDecl (struct/union/class/enum) decl...
virtual StringRef GetPureVirtualCallName()=0
Gets the pure virtual member call function.
Linkage getLinkage() const
const CXXRecordDecl * getBase() const
getBase - Returns the base class declaration.
bool hasBody(const FunctionDecl *&Definition) const
Returns true if the function has a body.
const CGFunctionInfo & arrangeUnprototypedMustTailThunk(const CXXMethodDecl *MD)
Arrange a thunk that takes 'this' as the first parameter followed by varargs.
DeclContext * getParent()
getParent - Returns the containing DeclContext.
void EmitCallAndReturnForThunk(llvm::FunctionCallee Callee, const ThunkInfo *Thunk, bool IsUnprototyped)
bool isExternallyVisible(Linkage L)
QualType getRecordType(const RecordDecl *Decl) const
const TargetInfo & getTarget() const
This template specialization was implicitly instantiated from a template.
const LangOptions & getLangOpts() const
ASTContext & getContext() const
virtual void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF, GlobalDecl GD, CallArgList &CallArgs)
CallingConv
CallingConv - Specifies the calling convention that a function uses.
GlobalDecl - represents a global declaration.
The l-value was considered opaque, so the alignment was determined from a type.
ArrayRef< VTableThunkTy > vtable_thunks() const
virtual void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, const ThisAdjustment &ThisAdjustment, raw_ostream &)=0
llvm::Constant * GetAddrOfThunk(StringRef Name, llvm::Type *FnTy, GlobalDecl GD)
Get the address of the thunk for the given global decl.
Encodes a location in the source.
QualType getReturnType() const
bool isSRetAfterThis() const
void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const
Set visibility, dllimport/dllexport and dso_local.
const Decl * getDecl() const
MangleContext - Context for tracking state which persists across multiple calls to the C++ name mangl...
Represents a static or instance method of a struct/union/class.
llvm::Constant * GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH=false)
Get the address of the RTTI descriptor for the given type.
CodeGenVTables(CodeGenModule &CGM)
void createVTableInitializer(ConstantStructBuilder &builder, const VTableLayout &layout, llvm::Constant *rtti)
Add vtable components for the given vtable layout to the given global initializer.
void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F)
Set the LLVM function attributes which only apply to a function definition.
virtual void emitVirtualInheritanceTables(const CXXRecordDecl *RD)=0
Emit any tables needed to implement virtual inheritance.
MangleContext & getMangleContext()
Gets the mangle context.
This template specialization was instantiated from a template due to an explicit instantiation defini...
This template specialization was formed from a template-id but has not yet been declared, defined, or instantiated.
llvm::GlobalVariable * GenerateConstructionVTable(const CXXRecordDecl *RD, const BaseSubobject &Base, bool BaseIsVirtual, llvm::GlobalVariable::LinkageTypes Linkage, VTableAddressPointsMapTy &AddressPoints)
GenerateConstructionVTable - Generate a construction vtable for the given base subobject.
FunctionArgList - Type for representing both the decl and type of parameters to a function...
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
void ErrorUnsupported(const Stmt *S, const char *Type)
Print out an error that codegen doesn't support the specified stmt yet.
CGFunctionInfo - Class to encapsulate the information about a function definition.
This class organizes the cross-function state that is used while generating LLVM code.
Dataflow Directional Tag Classes.
ThisAdjustment This
The this pointer adjustment.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine what kind of template instantiation this function represents.
void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable, const VTableLayout &VTLayout)
Emit type metadata for the given vtable using the given layout.
This template specialization was instantiated from a template due to an explicit instantiation declar...
const CXXRecordDecl * getParent() const
Return the parent of this method declaration, which is the class in which this method is defined...
void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params)
Build a parameter variable suitable for 'this'.
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
llvm::Module & getModule() const
void EmitThunks(GlobalDecl GD)
EmitThunks - Emit the associated thunks for the given global decl.
param_iterator param_end()
llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD)
Return the appropriate linkage for the vtable, VTT, and type information of the given class...
static RequiredArgs forPrototypePlus(const FunctionProtoType *prototype, unsigned additional)
Compute the arguments required by the given formal prototype, given that there may be some additional...
LinkageInfo getLinkageAndVisibility() const
Determines the linkage and visibility of this entity.
StructBuilder beginStruct(llvm::StructType *structTy=nullptr)
This template specialization was declared or defined by an explicit specialization (C++ [temp...
llvm::PointerType * Int8PtrTy
static bool shouldEmitVTableAtEndOfTranslationUnit(CodeGenModule &CGM, const CXXRecordDecl *RD)
Given that we're currently at the end of the translation unit, and we've emitted a reference to the v...
void GenerateClassData(const CXXRecordDecl *RD)
GenerateClassData - Generate all the class data required to be generated upon definition of a KeyFunc...
ReturnAdjustment Return
The return adjustment.
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.
Internal linkage, which indicates that the entity can be referred to from within the translation unit...
llvm::FunctionCallee CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name, llvm::AttributeList ExtraAttrs=llvm::AttributeList(), bool Local=false)
Create or return a runtime function declaration with the specified type and name. ...
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
bool isInlined() const
Determine whether this function should be inlined, because it is either marked "inline" or "constexpr...
llvm::Type * GetFunctionTypeForVTable(GlobalDecl GD)
GetFunctionTypeForVTable - Get the LLVM function type for use in a vtable, given a CXXMethodDecl...
llvm::IntegerType * PtrDiffTy
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
static RValue PerformReturnAdjustment(CodeGenFunction &CGF, QualType ResultType, RValue RV, const ThunkInfo &Thunk)
const CXXMethodDecl * getCurrentKeyFunction(const CXXRecordDecl *RD)
Get our current best idea for the key function of the given record decl, or nullptr if there isn't on...
Represents a C++ struct/union/class.
virtual void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk, raw_ostream &)=0
A helper class of ConstantInitBuilder, used for building constant struct initializers.
size_t getVTableSize(size_t i) const
bool isMicrosoft() const
Is this ABI an MSVC-compatible ABI?
A pointer to the deleting destructor.
CGCXXABI & getCXXABI() const
llvm::GlobalVariable * CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty, llvm::GlobalValue::LinkageTypes Linkage, unsigned Alignment)
Will return a global variable of the given type.
static Decl::Kind getKind(const Decl *D)
static RValue get(llvm::Value *V)
virtual llvm::Value * performReturnAdjustment(CodeGenFunction &CGF, Address Ret, const ReturnAdjustment &RA)=0
static ApplyDebugLocation CreateEmpty(CodeGenFunction &CGF)
Set the IRBuilder to not attach debug locations.
CodeGenVTables & getVTables()
void EmitMustTailThunk(GlobalDecl GD, llvm::Value *AdjustedThisPtr, llvm::FunctionCallee Callee)
Emit a musttail call for a thunk with a potentially adjusted this pointer.
CallArgList - Type for representing both the value and type of arguments in a call.
const CGFunctionInfo & arrangeCXXMethodCall(const CallArgList &args, const FunctionProtoType *type, RequiredArgs required, unsigned numPrefixArgs)
Arrange a call to a C++ method, passing the given arguments.
const LangOptions & getLangOpts() const
A pointer to the complete destructor.
A helper class of ConstantInitBuilder, used for building constant array initializers.
size_t getVTableOffset(size_t i) const
An entry that is never used.
virtual void setThunkLinkage(llvm::Function *Thunk, bool ForVTable, GlobalDecl GD, bool ReturnAdjustment)=0
SourceLocation getLocation() const
bool isExternallyVisible() const
void EmitVTable(CXXRecordDecl *Class)
This is a callback from Sema to tell us that a particular vtable is required to be emitted in this tr...
static OMPLinearClause * Create(const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc, OpenMPLinearClauseKind Modifier, SourceLocation ModifierLoc, SourceLocation ColonLoc, SourceLocation EndLoc, ArrayRef< Expr *> VL, ArrayRef< Expr *> PL, ArrayRef< Expr *> IL, Expr *Step, Expr *CalcStep, Stmt *PreInit, Expr *PostUpdate)
Creates clause with a list of variables VL and a linear step Step.
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.