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diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
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+++ b/clang/lib/CodeGen/CGClass.cpp
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+//===--- CGClass.cpp - Emit LLVM Code for C++ classes ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This contains code dealing with C++ code generation of classes
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGBlocks.h"
+#include "CGDebugInfo.h"
+#include "CodeGenFunction.h"
+#include "clang/AST/CXXInheritance.h"
+#include "clang/AST/EvaluatedExprVisitor.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/AST/StmtCXX.h"
+#include "clang/Frontend/CodeGenOptions.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+static CharUnits
+ComputeNonVirtualBaseClassOffset(ASTContext &Context,
+ const CXXRecordDecl *DerivedClass,
+ CastExpr::path_const_iterator Start,
+ CastExpr::path_const_iterator End) {
+ CharUnits Offset = CharUnits::Zero();
+
+ const CXXRecordDecl *RD = DerivedClass;
+
+ for (CastExpr::path_const_iterator I = Start; I != End; ++I) {
+ const CXXBaseSpecifier *Base = *I;
+ assert(!Base->isVirtual() && "Should not see virtual bases here!");
+
+ // Get the layout.
+ const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD);
+
+ const CXXRecordDecl *BaseDecl =
+ cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl());
+
+ // Add the offset.
+ Offset += Layout.getBaseClassOffset(BaseDecl);
+
+ RD = BaseDecl;
+ }
+
+ return Offset;
+}
+
+llvm::Constant *
+CodeGenModule::GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
+ CastExpr::path_const_iterator PathBegin,
+ CastExpr::path_const_iterator PathEnd) {
+ assert(PathBegin != PathEnd && "Base path should not be empty!");
+
+ CharUnits Offset =
+ ComputeNonVirtualBaseClassOffset(getContext(), ClassDecl,
+ PathBegin, PathEnd);
+ if (Offset.isZero())
+ return 0;
+
+ llvm::Type *PtrDiffTy =
+ Types.ConvertType(getContext().getPointerDiffType());
+
+ return llvm::ConstantInt::get(PtrDiffTy, Offset.getQuantity());
+}
+
+/// Gets the address of a direct base class within a complete object.
+/// This should only be used for (1) non-virtual bases or (2) virtual bases
+/// when the type is known to be complete (e.g. in complete destructors).
+///
+/// The object pointed to by 'This' is assumed to be non-null.
+llvm::Value *
+CodeGenFunction::GetAddressOfDirectBaseInCompleteClass(llvm::Value *This,
+ const CXXRecordDecl *Derived,
+ const CXXRecordDecl *Base,
+ bool BaseIsVirtual) {
+ // 'this' must be a pointer (in some address space) to Derived.
+ assert(This->getType()->isPointerTy() &&
+ cast<llvm::PointerType>(This->getType())->getElementType()
+ == ConvertType(Derived));
+
+ // Compute the offset of the virtual base.
+ CharUnits Offset;
+ const ASTRecordLayout &Layout = getContext().getASTRecordLayout(Derived);
+ if (BaseIsVirtual)
+ Offset = Layout.getVBaseClassOffset(Base);
+ else
+ Offset = Layout.getBaseClassOffset(Base);
+
+ // Shift and cast down to the base type.
+ // TODO: for complete types, this should be possible with a GEP.
+ llvm::Value *V = This;
+ if (Offset.isPositive()) {
+ V = Builder.CreateBitCast(V, Int8PtrTy);
+ V = Builder.CreateConstInBoundsGEP1_64(V, Offset.getQuantity());
+ }
+ V = Builder.CreateBitCast(V, ConvertType(Base)->getPointerTo());
+
+ return V;
+}
+
+static llvm::Value *
+ApplyNonVirtualAndVirtualOffset(CodeGenFunction &CGF, llvm::Value *ThisPtr,
+ CharUnits NonVirtual, llvm::Value *Virtual) {
+ llvm::Type *PtrDiffTy =
+ CGF.ConvertType(CGF.getContext().getPointerDiffType());
+
+ llvm::Value *NonVirtualOffset = 0;
+ if (!NonVirtual.isZero())
+ NonVirtualOffset = llvm::ConstantInt::get(PtrDiffTy,
+ NonVirtual.getQuantity());
+
+ llvm::Value *BaseOffset;
+ if (Virtual) {
+ if (NonVirtualOffset)
+ BaseOffset = CGF.Builder.CreateAdd(Virtual, NonVirtualOffset);
+ else
+ BaseOffset = Virtual;
+ } else
+ BaseOffset = NonVirtualOffset;
+
+ // Apply the base offset.
+ ThisPtr = CGF.Builder.CreateBitCast(ThisPtr, CGF.Int8PtrTy);
+ ThisPtr = CGF.Builder.CreateGEP(ThisPtr, BaseOffset, "add.ptr");
+
+ return ThisPtr;
+}
+
+llvm::Value *
+CodeGenFunction::GetAddressOfBaseClass(llvm::Value *Value,
+ const CXXRecordDecl *Derived,
+ CastExpr::path_const_iterator PathBegin,
+ CastExpr::path_const_iterator PathEnd,
+ bool NullCheckValue) {
+ assert(PathBegin != PathEnd && "Base path should not be empty!");
+
+ CastExpr::path_const_iterator Start = PathBegin;
+ const CXXRecordDecl *VBase = 0;
+
+ // Get the virtual base.
+ if ((*Start)->isVirtual()) {
+ VBase =
+ cast<CXXRecordDecl>((*Start)->getType()->getAs<RecordType>()->getDecl());
+ ++Start;
+ }
+
+ CharUnits NonVirtualOffset =
+ ComputeNonVirtualBaseClassOffset(getContext(), VBase ? VBase : Derived,
+ Start, PathEnd);
+
+ // Get the base pointer type.
+ llvm::Type *BasePtrTy =
+ ConvertType((PathEnd[-1])->getType())->getPointerTo();
+
+ if (NonVirtualOffset.isZero() && !VBase) {
+ // Just cast back.
+ return Builder.CreateBitCast(Value, BasePtrTy);
+ }
+
+ llvm::BasicBlock *CastNull = 0;
+ llvm::BasicBlock *CastNotNull = 0;
+ llvm::BasicBlock *CastEnd = 0;
+
+ if (NullCheckValue) {
+ CastNull = createBasicBlock("cast.null");
+ CastNotNull = createBasicBlock("cast.notnull");
+ CastEnd = createBasicBlock("cast.end");
+
+ llvm::Value *IsNull = Builder.CreateIsNull(Value);
+ Builder.CreateCondBr(IsNull, CastNull, CastNotNull);
+ EmitBlock(CastNotNull);
+ }
+
+ llvm::Value *VirtualOffset = 0;
+
+ if (VBase) {
+ if (Derived->hasAttr<FinalAttr>()) {
+ VirtualOffset = 0;
+
+ const ASTRecordLayout &Layout = getContext().getASTRecordLayout(Derived);
+
+ CharUnits VBaseOffset = Layout.getVBaseClassOffset(VBase);
+ NonVirtualOffset += VBaseOffset;
+ } else
+ VirtualOffset = GetVirtualBaseClassOffset(Value, Derived, VBase);
+ }
+
+ // Apply the offsets.
+ Value = ApplyNonVirtualAndVirtualOffset(*this, Value,
+ NonVirtualOffset,
+ VirtualOffset);
+
+ // Cast back.
+ Value = Builder.CreateBitCast(Value, BasePtrTy);
+
+ if (NullCheckValue) {
+ Builder.CreateBr(CastEnd);
+ EmitBlock(CastNull);
+ Builder.CreateBr(CastEnd);
+ EmitBlock(CastEnd);
+
+ llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2);
+ PHI->addIncoming(Value, CastNotNull);
+ PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()),
+ CastNull);
+ Value = PHI;
+ }
+
+ return Value;
+}
+
+llvm::Value *
+CodeGenFunction::GetAddressOfDerivedClass(llvm::Value *Value,
+ const CXXRecordDecl *Derived,
+ CastExpr::path_const_iterator PathBegin,
+ CastExpr::path_const_iterator PathEnd,
+ bool NullCheckValue) {
+ assert(PathBegin != PathEnd && "Base path should not be empty!");
+
+ QualType DerivedTy =
+ getContext().getCanonicalType(getContext().getTagDeclType(Derived));
+ llvm::Type *DerivedPtrTy = ConvertType(DerivedTy)->getPointerTo();
+
+ llvm::Value *NonVirtualOffset =
+ CGM.GetNonVirtualBaseClassOffset(Derived, PathBegin, PathEnd);
+
+ if (!NonVirtualOffset) {
+ // No offset, we can just cast back.
+ return Builder.CreateBitCast(Value, DerivedPtrTy);
+ }
+
+ llvm::BasicBlock *CastNull = 0;
+ llvm::BasicBlock *CastNotNull = 0;
+ llvm::BasicBlock *CastEnd = 0;
+
+ if (NullCheckValue) {
+ CastNull = createBasicBlock("cast.null");
+ CastNotNull = createBasicBlock("cast.notnull");
+ CastEnd = createBasicBlock("cast.end");
+
+ llvm::Value *IsNull = Builder.CreateIsNull(Value);
+ Builder.CreateCondBr(IsNull, CastNull, CastNotNull);
+ EmitBlock(CastNotNull);
+ }
+
+ // Apply the offset.
+ Value = Builder.CreateBitCast(Value, Int8PtrTy);
+ Value = Builder.CreateGEP(Value, Builder.CreateNeg(NonVirtualOffset),
+ "sub.ptr");
+
+ // Just cast.
+ Value = Builder.CreateBitCast(Value, DerivedPtrTy);
+
+ if (NullCheckValue) {
+ Builder.CreateBr(CastEnd);
+ EmitBlock(CastNull);
+ Builder.CreateBr(CastEnd);
+ EmitBlock(CastEnd);
+
+ llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2);
+ PHI->addIncoming(Value, CastNotNull);
+ PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()),
+ CastNull);
+ Value = PHI;
+ }
+
+ return Value;
+}
+
+/// GetVTTParameter - Return the VTT parameter that should be passed to a
+/// base constructor/destructor with virtual bases.
+static llvm::Value *GetVTTParameter(CodeGenFunction &CGF, GlobalDecl GD,
+ bool ForVirtualBase) {
+ if (!CodeGenVTables::needsVTTParameter(GD)) {
+ // This constructor/destructor does not need a VTT parameter.
+ return 0;
+ }
+
+ const CXXRecordDecl *RD = cast<CXXMethodDecl>(CGF.CurFuncDecl)->getParent();
+ const CXXRecordDecl *Base = cast<CXXMethodDecl>(GD.getDecl())->getParent();
+
+ llvm::Value *VTT;
+
+ uint64_t SubVTTIndex;
+
+ // If the record matches the base, this is the complete ctor/dtor
+ // variant calling the base variant in a class with virtual bases.
+ if (RD == Base) {
+ assert(!CodeGenVTables::needsVTTParameter(CGF.CurGD) &&
+ "doing no-op VTT offset in base dtor/ctor?");
+ assert(!ForVirtualBase && "Can't have same class as virtual base!");
+ SubVTTIndex = 0;
+ } else {
+ const ASTRecordLayout &Layout =
+ CGF.getContext().getASTRecordLayout(RD);
+ CharUnits BaseOffset = ForVirtualBase ?
+ Layout.getVBaseClassOffset(Base) :
+ Layout.getBaseClassOffset(Base);
+
+ SubVTTIndex =
+ CGF.CGM.getVTables().getSubVTTIndex(RD, BaseSubobject(Base, BaseOffset));
+ assert(SubVTTIndex != 0 && "Sub-VTT index must be greater than zero!");
+ }
+
+ if (CodeGenVTables::needsVTTParameter(CGF.CurGD)) {
+ // A VTT parameter was passed to the constructor, use it.
+ VTT = CGF.LoadCXXVTT();
+ VTT = CGF.Builder.CreateConstInBoundsGEP1_64(VTT, SubVTTIndex);
+ } else {
+ // We're the complete constructor, so get the VTT by name.
+ VTT = CGF.CGM.getVTables().GetAddrOfVTT(RD);
+ VTT = CGF.Builder.CreateConstInBoundsGEP2_64(VTT, 0, SubVTTIndex);
+ }
+
+ return VTT;
+}
+
+namespace {
+ /// Call the destructor for a direct base class.
+ struct CallBaseDtor : EHScopeStack::Cleanup {
+ const CXXRecordDecl *BaseClass;
+ bool BaseIsVirtual;
+ CallBaseDtor(const CXXRecordDecl *Base, bool BaseIsVirtual)
+ : BaseClass(Base), BaseIsVirtual(BaseIsVirtual) {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ const CXXRecordDecl *DerivedClass =
+ cast<CXXMethodDecl>(CGF.CurCodeDecl)->getParent();
+
+ const CXXDestructorDecl *D = BaseClass->getDestructor();
+ llvm::Value *Addr =
+ CGF.GetAddressOfDirectBaseInCompleteClass(CGF.LoadCXXThis(),
+ DerivedClass, BaseClass,
+ BaseIsVirtual);
+ CGF.EmitCXXDestructorCall(D, Dtor_Base, BaseIsVirtual, Addr);
+ }
+ };
+
+ /// A visitor which checks whether an initializer uses 'this' in a
+ /// way which requires the vtable to be properly set.
+ struct DynamicThisUseChecker : EvaluatedExprVisitor<DynamicThisUseChecker> {
+ typedef EvaluatedExprVisitor<DynamicThisUseChecker> super;
+
+ bool UsesThis;
+
+ DynamicThisUseChecker(ASTContext &C) : super(C), UsesThis(false) {}
+
+ // Black-list all explicit and implicit references to 'this'.
+ //
+ // Do we need to worry about external references to 'this' derived
+ // from arbitrary code? If so, then anything which runs arbitrary
+ // external code might potentially access the vtable.
+ void VisitCXXThisExpr(CXXThisExpr *E) { UsesThis = true; }
+ };
+}
+
+static bool BaseInitializerUsesThis(ASTContext &C, const Expr *Init) {
+ DynamicThisUseChecker Checker(C);
+ Checker.Visit(const_cast<Expr*>(Init));
+ return Checker.UsesThis;
+}
+
+static void EmitBaseInitializer(CodeGenFunction &CGF,
+ const CXXRecordDecl *ClassDecl,
+ CXXCtorInitializer *BaseInit,
+ CXXCtorType CtorType) {
+ assert(BaseInit->isBaseInitializer() &&
+ "Must have base initializer!");
+
+ llvm::Value *ThisPtr = CGF.LoadCXXThis();
+
+ const Type *BaseType = BaseInit->getBaseClass();
+ CXXRecordDecl *BaseClassDecl =
+ cast<CXXRecordDecl>(BaseType->getAs<RecordType>()->getDecl());
+
+ bool isBaseVirtual = BaseInit->isBaseVirtual();
+
+ // The base constructor doesn't construct virtual bases.
+ if (CtorType == Ctor_Base && isBaseVirtual)
+ return;
+
+ // If the initializer for the base (other than the constructor
+ // itself) accesses 'this' in any way, we need to initialize the
+ // vtables.
+ if (BaseInitializerUsesThis(CGF.getContext(), BaseInit->getInit()))
+ CGF.InitializeVTablePointers(ClassDecl);
+
+ // We can pretend to be a complete class because it only matters for
+ // virtual bases, and we only do virtual bases for complete ctors.
+ llvm::Value *V =
+ CGF.GetAddressOfDirectBaseInCompleteClass(ThisPtr, ClassDecl,
+ BaseClassDecl,
+ isBaseVirtual);
+ CharUnits Alignment = CGF.getContext().getTypeAlignInChars(BaseType);
+ AggValueSlot AggSlot =
+ AggValueSlot::forAddr(V, Alignment, Qualifiers(),
+ AggValueSlot::IsDestructed,
+ AggValueSlot::DoesNotNeedGCBarriers,
+ AggValueSlot::IsNotAliased);
+
+ CGF.EmitAggExpr(BaseInit->getInit(), AggSlot);
+
+ if (CGF.CGM.getLangOpts().Exceptions &&
+ !BaseClassDecl->hasTrivialDestructor())
+ CGF.EHStack.pushCleanup<CallBaseDtor>(EHCleanup, BaseClassDecl,
+ isBaseVirtual);
+}
+
+static void EmitAggMemberInitializer(CodeGenFunction &CGF,
+ LValue LHS,
+ Expr *Init,
+ llvm::Value *ArrayIndexVar,
+ QualType T,
+ ArrayRef<VarDecl *> ArrayIndexes,
+ unsigned Index) {
+ if (Index == ArrayIndexes.size()) {
+ LValue LV = LHS;
+ { // Scope for Cleanups.
+ CodeGenFunction::RunCleanupsScope Cleanups(CGF);
+
+ if (ArrayIndexVar) {
+ // If we have an array index variable, load it and use it as an offset.
+ // Then, increment the value.
+ llvm::Value *Dest = LHS.getAddress();
+ llvm::Value *ArrayIndex = CGF.Builder.CreateLoad(ArrayIndexVar);
+ Dest = CGF.Builder.CreateInBoundsGEP(Dest, ArrayIndex, "destaddress");
+ llvm::Value *Next = llvm::ConstantInt::get(ArrayIndex->getType(), 1);
+ Next = CGF.Builder.CreateAdd(ArrayIndex, Next, "inc");
+ CGF.Builder.CreateStore(Next, ArrayIndexVar);
+
+ // Update the LValue.
+ LV.setAddress(Dest);
+ CharUnits Align = CGF.getContext().getTypeAlignInChars(T);
+ LV.setAlignment(std::min(Align, LV.getAlignment()));
+ }
+
+ if (!CGF.hasAggregateLLVMType(T)) {
+ CGF.EmitScalarInit(Init, /*decl*/ 0, LV, false);
+ } else if (T->isAnyComplexType()) {
+ CGF.EmitComplexExprIntoAddr(Init, LV.getAddress(),
+ LV.isVolatileQualified());
+ } else {
+ AggValueSlot Slot =
+ AggValueSlot::forLValue(LV,
+ AggValueSlot::IsDestructed,
+ AggValueSlot::DoesNotNeedGCBarriers,
+ AggValueSlot::IsNotAliased);
+
+ CGF.EmitAggExpr(Init, Slot);
+ }
+ }
+
+ // Now, outside of the initializer cleanup scope, destroy the backing array
+ // for a std::initializer_list member.
+ CGF.MaybeEmitStdInitializerListCleanup(LV.getAddress(), Init);
+
+ return;
+ }
+
+ const ConstantArrayType *Array = CGF.getContext().getAsConstantArrayType(T);
+ assert(Array && "Array initialization without the array type?");
+ llvm::Value *IndexVar
+ = CGF.GetAddrOfLocalVar(ArrayIndexes[Index]);
+ assert(IndexVar && "Array index variable not loaded");
+
+ // Initialize this index variable to zero.
+ llvm::Value* Zero
+ = llvm::Constant::getNullValue(
+ CGF.ConvertType(CGF.getContext().getSizeType()));
+ CGF.Builder.CreateStore(Zero, IndexVar);
+
+ // Start the loop with a block that tests the condition.
+ llvm::BasicBlock *CondBlock = CGF.createBasicBlock("for.cond");
+ llvm::BasicBlock *AfterFor = CGF.createBasicBlock("for.end");
+
+ CGF.EmitBlock(CondBlock);
+
+ llvm::BasicBlock *ForBody = CGF.createBasicBlock("for.body");
+ // Generate: if (loop-index < number-of-elements) fall to the loop body,
+ // otherwise, go to the block after the for-loop.
+ uint64_t NumElements = Array->getSize().getZExtValue();
+ llvm::Value *Counter = CGF.Builder.CreateLoad(IndexVar);
+ llvm::Value *NumElementsPtr =
+ llvm::ConstantInt::get(Counter->getType(), NumElements);
+ llvm::Value *IsLess = CGF.Builder.CreateICmpULT(Counter, NumElementsPtr,
+ "isless");
+
+ // If the condition is true, execute the body.
+ CGF.Builder.CreateCondBr(IsLess, ForBody, AfterFor);
+
+ CGF.EmitBlock(ForBody);
+ llvm::BasicBlock *ContinueBlock = CGF.createBasicBlock("for.inc");
+
+ {
+ CodeGenFunction::RunCleanupsScope Cleanups(CGF);
+
+ // Inside the loop body recurse to emit the inner loop or, eventually, the
+ // constructor call.
+ EmitAggMemberInitializer(CGF, LHS, Init, ArrayIndexVar,
+ Array->getElementType(), ArrayIndexes, Index + 1);
+ }
+
+ CGF.EmitBlock(ContinueBlock);
+
+ // Emit the increment of the loop counter.
+ llvm::Value *NextVal = llvm::ConstantInt::get(Counter->getType(), 1);
+ Counter = CGF.Builder.CreateLoad(IndexVar);
+ NextVal = CGF.Builder.CreateAdd(Counter, NextVal, "inc");
+ CGF.Builder.CreateStore(NextVal, IndexVar);
+
+ // Finally, branch back up to the condition for the next iteration.
+ CGF.EmitBranch(CondBlock);
+
+ // Emit the fall-through block.
+ CGF.EmitBlock(AfterFor, true);
+}
+
+namespace {
+ struct CallMemberDtor : EHScopeStack::Cleanup {
+ llvm::Value *V;
+ CXXDestructorDecl *Dtor;
+
+ CallMemberDtor(llvm::Value *V, CXXDestructorDecl *Dtor)
+ : V(V), Dtor(Dtor) {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete, /*ForVirtualBase=*/false,
+ V);
+ }
+ };
+}
+
+static bool hasTrivialCopyOrMoveConstructor(const CXXRecordDecl *Record,
+ bool Moving) {
+ return Moving ? Record->hasTrivialMoveConstructor() :
+ Record->hasTrivialCopyConstructor();
+}
+
+static void EmitMemberInitializer(CodeGenFunction &CGF,
+ const CXXRecordDecl *ClassDecl,
+ CXXCtorInitializer *MemberInit,
+ const CXXConstructorDecl *Constructor,
+ FunctionArgList &Args) {
+ assert(MemberInit->isAnyMemberInitializer() &&
+ "Must have member initializer!");
+ assert(MemberInit->getInit() && "Must have initializer!");
+
+ // non-static data member initializers.
+ FieldDecl *Field = MemberInit->getAnyMember();
+ QualType FieldType = Field->getType();
+
+ llvm::Value *ThisPtr = CGF.LoadCXXThis();
+ QualType RecordTy = CGF.getContext().getTypeDeclType(ClassDecl);
+ LValue LHS;
+
+ // If we are initializing an anonymous union field, drill down to the field.
+ if (MemberInit->isIndirectMemberInitializer()) {
+ LHS = CGF.EmitLValueForAnonRecordField(ThisPtr,
+ MemberInit->getIndirectMember(), 0);
+ FieldType = MemberInit->getIndirectMember()->getAnonField()->getType();
+ } else {
+ LValue ThisLHSLV = CGF.MakeNaturalAlignAddrLValue(ThisPtr, RecordTy);
+ LHS = CGF.EmitLValueForFieldInitialization(ThisLHSLV, Field);
+ }
+
+ // Special case: if we are in a copy or move constructor, and we are copying
+ // an array of PODs or classes with trivial copy constructors, ignore the
+ // AST and perform the copy we know is equivalent.
+ // FIXME: This is hacky at best... if we had a bit more explicit information
+ // in the AST, we could generalize it more easily.
+ const ConstantArrayType *Array
+ = CGF.getContext().getAsConstantArrayType(FieldType);
+ if (Array && Constructor->isImplicitlyDefined() &&
+ Constructor->isCopyOrMoveConstructor()) {
+ QualType BaseElementTy = CGF.getContext().getBaseElementType(Array);
+ const CXXRecordDecl *Record = BaseElementTy->getAsCXXRecordDecl();
+ if (BaseElementTy.isPODType(CGF.getContext()) ||
+ (Record && hasTrivialCopyOrMoveConstructor(Record,
+ Constructor->isMoveConstructor()))) {
+ // Find the source pointer. We knows it's the last argument because
+ // we know we're in a copy constructor.
+ unsigned SrcArgIndex = Args.size() - 1;
+ llvm::Value *SrcPtr
+ = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(Args[SrcArgIndex]));
+ LValue ThisRHSLV = CGF.MakeNaturalAlignAddrLValue(SrcPtr, RecordTy);
+ LValue Src = CGF.EmitLValueForFieldInitialization(ThisRHSLV, Field);
+
+ // Copy the aggregate.
+ CGF.EmitAggregateCopy(LHS.getAddress(), Src.getAddress(), FieldType,
+ LHS.isVolatileQualified());
+ return;
+ }
+ }
+
+ ArrayRef<VarDecl *> ArrayIndexes;
+ if (MemberInit->getNumArrayIndices())
+ ArrayIndexes = MemberInit->getArrayIndexes();
+ CGF.EmitInitializerForField(Field, LHS, MemberInit->getInit(), ArrayIndexes);
+}
+
+void CodeGenFunction::EmitInitializerForField(FieldDecl *Field,
+ LValue LHS, Expr *Init,
+ ArrayRef<VarDecl *> ArrayIndexes) {
+ QualType FieldType = Field->getType();
+ if (!hasAggregateLLVMType(FieldType)) {
+ if (LHS.isSimple()) {
+ EmitExprAsInit(Init, Field, LHS, false);
+ } else {
+ RValue RHS = RValue::get(EmitScalarExpr(Init));
+ EmitStoreThroughLValue(RHS, LHS);
+ }
+ } else if (FieldType->isAnyComplexType()) {
+ EmitComplexExprIntoAddr(Init, LHS.getAddress(), LHS.isVolatileQualified());
+ } else {
+ llvm::Value *ArrayIndexVar = 0;
+ if (ArrayIndexes.size()) {
+ llvm::Type *SizeTy = ConvertType(getContext().getSizeType());
+
+ // The LHS is a pointer to the first object we'll be constructing, as
+ // a flat array.
+ QualType BaseElementTy = getContext().getBaseElementType(FieldType);
+ llvm::Type *BasePtr = ConvertType(BaseElementTy);
+ BasePtr = llvm::PointerType::getUnqual(BasePtr);
+ llvm::Value *BaseAddrPtr = Builder.CreateBitCast(LHS.getAddress(),
+ BasePtr);
+ LHS = MakeAddrLValue(BaseAddrPtr, BaseElementTy);
+
+ // Create an array index that will be used to walk over all of the
+ // objects we're constructing.
+ ArrayIndexVar = CreateTempAlloca(SizeTy, "object.index");
+ llvm::Value *Zero = llvm::Constant::getNullValue(SizeTy);
+ Builder.CreateStore(Zero, ArrayIndexVar);
+
+
+ // Emit the block variables for the array indices, if any.
+ for (unsigned I = 0, N = ArrayIndexes.size(); I != N; ++I)
+ EmitAutoVarDecl(*ArrayIndexes[I]);
+ }
+
+ EmitAggMemberInitializer(*this, LHS, Init, ArrayIndexVar, FieldType,
+ ArrayIndexes, 0);
+
+ if (!CGM.getLangOpts().Exceptions)
+ return;
+
+ // FIXME: If we have an array of classes w/ non-trivial destructors,
+ // we need to destroy in reverse order of construction along the exception
+ // path.
+ const RecordType *RT = FieldType->getAs<RecordType>();
+ if (!RT)
+ return;
+
+ CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
+ if (!RD->hasTrivialDestructor())
+ EHStack.pushCleanup<CallMemberDtor>(EHCleanup, LHS.getAddress(),
+ RD->getDestructor());
+ }
+}
+
+/// Checks whether the given constructor is a valid subject for the
+/// complete-to-base constructor delegation optimization, i.e.
+/// emitting the complete constructor as a simple call to the base
+/// constructor.
+static bool IsConstructorDelegationValid(const CXXConstructorDecl *Ctor) {
+
+ // Currently we disable the optimization for classes with virtual
+ // bases because (1) the addresses of parameter variables need to be
+ // consistent across all initializers but (2) the delegate function
+ // call necessarily creates a second copy of the parameter variable.
+ //
+ // The limiting example (purely theoretical AFAIK):
+ // struct A { A(int &c) { c++; } };
+ // struct B : virtual A {
+ // B(int count) : A(count) { printf("%d\n", count); }
+ // };
+ // ...although even this example could in principle be emitted as a
+ // delegation since the address of the parameter doesn't escape.
+ if (Ctor->getParent()->getNumVBases()) {
+ // TODO: white-list trivial vbase initializers. This case wouldn't
+ // be subject to the restrictions below.
+
+ // TODO: white-list cases where:
+ // - there are no non-reference parameters to the constructor
+ // - the initializers don't access any non-reference parameters
+ // - the initializers don't take the address of non-reference
+ // parameters
+ // - etc.
+ // If we ever add any of the above cases, remember that:
+ // - function-try-blocks will always blacklist this optimization
+ // - we need to perform the constructor prologue and cleanup in
+ // EmitConstructorBody.
+
+ return false;
+ }
+
+ // We also disable the optimization for variadic functions because
+ // it's impossible to "re-pass" varargs.
+ if (Ctor->getType()->getAs<FunctionProtoType>()->isVariadic())
+ return false;
+
+ // FIXME: Decide if we can do a delegation of a delegating constructor.
+ if (Ctor->isDelegatingConstructor())
+ return false;
+
+ return true;
+}
+
+/// EmitConstructorBody - Emits the body of the current constructor.
+void CodeGenFunction::EmitConstructorBody(FunctionArgList &Args) {
+ const CXXConstructorDecl *Ctor = cast<CXXConstructorDecl>(CurGD.getDecl());
+ CXXCtorType CtorType = CurGD.getCtorType();
+
+ // Before we go any further, try the complete->base constructor
+ // delegation optimization.
+ if (CtorType == Ctor_Complete && IsConstructorDelegationValid(Ctor)) {
+ if (CGDebugInfo *DI = getDebugInfo())
+ DI->EmitLocation(Builder, Ctor->getLocEnd());
+ EmitDelegateCXXConstructorCall(Ctor, Ctor_Base, Args);
+ return;
+ }
+
+ Stmt *Body = Ctor->getBody();
+
+ // Enter the function-try-block before the constructor prologue if
+ // applicable.
+ bool IsTryBody = (Body && isa<CXXTryStmt>(Body));
+ if (IsTryBody)
+ EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
+
+ EHScopeStack::stable_iterator CleanupDepth = EHStack.stable_begin();
+
+ // TODO: in restricted cases, we can emit the vbase initializers of
+ // a complete ctor and then delegate to the base ctor.
+
+ // Emit the constructor prologue, i.e. the base and member
+ // initializers.
+ EmitCtorPrologue(Ctor, CtorType, Args);
+
+ // Emit the body of the statement.
+ if (IsTryBody)
+ EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
+ else if (Body)
+ EmitStmt(Body);
+
+ // Emit any cleanup blocks associated with the member or base
+ // initializers, which includes (along the exceptional path) the
+ // destructors for those members and bases that were fully
+ // constructed.
+ PopCleanupBlocks(CleanupDepth);
+
+ if (IsTryBody)
+ ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
+}
+
+/// EmitCtorPrologue - This routine generates necessary code to initialize
+/// base classes and non-static data members belonging to this constructor.
+void CodeGenFunction::EmitCtorPrologue(const CXXConstructorDecl *CD,
+ CXXCtorType CtorType,
+ FunctionArgList &Args) {
+ if (CD->isDelegatingConstructor())
+ return EmitDelegatingCXXConstructorCall(CD, Args);
+
+ const CXXRecordDecl *ClassDecl = CD->getParent();
+
+ SmallVector<CXXCtorInitializer *, 8> MemberInitializers;
+
+ for (CXXConstructorDecl::init_const_iterator B = CD->init_begin(),
+ E = CD->init_end();
+ B != E; ++B) {
+ CXXCtorInitializer *Member = (*B);
+
+ if (Member->isBaseInitializer()) {
+ EmitBaseInitializer(*this, ClassDecl, Member, CtorType);
+ } else {
+ assert(Member->isAnyMemberInitializer() &&
+ "Delegating initializer on non-delegating constructor");
+ MemberInitializers.push_back(Member);
+ }
+ }
+
+ InitializeVTablePointers(ClassDecl);
+
+ for (unsigned I = 0, E = MemberInitializers.size(); I != E; ++I)
+ EmitMemberInitializer(*this, ClassDecl, MemberInitializers[I], CD, Args);
+}
+
+static bool
+FieldHasTrivialDestructorBody(ASTContext &Context, const FieldDecl *Field);
+
+static bool
+HasTrivialDestructorBody(ASTContext &Context,
+ const CXXRecordDecl *BaseClassDecl,
+ const CXXRecordDecl *MostDerivedClassDecl)
+{
+ // If the destructor is trivial we don't have to check anything else.
+ if (BaseClassDecl->hasTrivialDestructor())
+ return true;
+
+ if (!BaseClassDecl->getDestructor()->hasTrivialBody())
+ return false;
+
+ // Check fields.
+ for (CXXRecordDecl::field_iterator I = BaseClassDecl->field_begin(),
+ E = BaseClassDecl->field_end(); I != E; ++I) {
+ const FieldDecl *Field = *I;
+
+ if (!FieldHasTrivialDestructorBody(Context, Field))
+ return false;
+ }
+
+ // Check non-virtual bases.
+ for (CXXRecordDecl::base_class_const_iterator I =
+ BaseClassDecl->bases_begin(), E = BaseClassDecl->bases_end();
+ I != E; ++I) {
+ if (I->isVirtual())
+ continue;
+
+ const CXXRecordDecl *NonVirtualBase =
+ cast<CXXRecordDecl>(I->getType()->castAs<RecordType>()->getDecl());
+ if (!HasTrivialDestructorBody(Context, NonVirtualBase,
+ MostDerivedClassDecl))
+ return false;
+ }
+
+ if (BaseClassDecl == MostDerivedClassDecl) {
+ // Check virtual bases.
+ for (CXXRecordDecl::base_class_const_iterator I =
+ BaseClassDecl->vbases_begin(), E = BaseClassDecl->vbases_end();
+ I != E; ++I) {
+ const CXXRecordDecl *VirtualBase =
+ cast<CXXRecordDecl>(I->getType()->castAs<RecordType>()->getDecl());
+ if (!HasTrivialDestructorBody(Context, VirtualBase,
+ MostDerivedClassDecl))
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static bool
+FieldHasTrivialDestructorBody(ASTContext &Context,
+ const FieldDecl *Field)
+{
+ QualType FieldBaseElementType = Context.getBaseElementType(Field->getType());
+
+ const RecordType *RT = FieldBaseElementType->getAs<RecordType>();
+ if (!RT)
+ return true;
+
+ CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
+ return HasTrivialDestructorBody(Context, FieldClassDecl, FieldClassDecl);
+}
+
+/// CanSkipVTablePointerInitialization - Check whether we need to initialize
+/// any vtable pointers before calling this destructor.
+static bool CanSkipVTablePointerInitialization(ASTContext &Context,
+ const CXXDestructorDecl *Dtor) {
+ if (!Dtor->hasTrivialBody())
+ return false;
+
+ // Check the fields.
+ const CXXRecordDecl *ClassDecl = Dtor->getParent();
+ for (CXXRecordDecl::field_iterator I = ClassDecl->field_begin(),
+ E = ClassDecl->field_end(); I != E; ++I) {
+ const FieldDecl *Field = *I;
+
+ if (!FieldHasTrivialDestructorBody(Context, Field))
+ return false;
+ }
+
+ return true;
+}
+
+/// EmitDestructorBody - Emits the body of the current destructor.
+void CodeGenFunction::EmitDestructorBody(FunctionArgList &Args) {
+ const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CurGD.getDecl());
+ CXXDtorType DtorType = CurGD.getDtorType();
+
+ // The call to operator delete in a deleting destructor happens
+ // outside of the function-try-block, which means it's always
+ // possible to delegate the destructor body to the complete
+ // destructor. Do so.
+ if (DtorType == Dtor_Deleting) {
+ EnterDtorCleanups(Dtor, Dtor_Deleting);
+ EmitCXXDestructorCall(Dtor, Dtor_Complete, /*ForVirtualBase=*/false,
+ LoadCXXThis());
+ PopCleanupBlock();
+ return;
+ }
+
+ Stmt *Body = Dtor->getBody();
+
+ // If the body is a function-try-block, enter the try before
+ // anything else.
+ bool isTryBody = (Body && isa<CXXTryStmt>(Body));
+ if (isTryBody)
+ EnterCXXTryStmt(*cast<CXXTryStmt>(Body), true);
+
+ // Enter the epilogue cleanups.
+ RunCleanupsScope DtorEpilogue(*this);
+
+ // If this is the complete variant, just invoke the base variant;
+ // the epilogue will destruct the virtual bases. But we can't do
+ // this optimization if the body is a function-try-block, because
+ // we'd introduce *two* handler blocks.
+ switch (DtorType) {
+ case Dtor_Deleting: llvm_unreachable("already handled deleting case");
+
+ case Dtor_Complete:
+ // Enter the cleanup scopes for virtual bases.
+ EnterDtorCleanups(Dtor, Dtor_Complete);
+
+ if (!isTryBody) {
+ EmitCXXDestructorCall(Dtor, Dtor_Base, /*ForVirtualBase=*/false,
+ LoadCXXThis());
+ break;
+ }
+ // Fallthrough: act like we're in the base variant.
+
+ case Dtor_Base:
+ // Enter the cleanup scopes for fields and non-virtual bases.
+ EnterDtorCleanups(Dtor, Dtor_Base);
+
+ // Initialize the vtable pointers before entering the body.
+ if (!CanSkipVTablePointerInitialization(getContext(), Dtor))
+ InitializeVTablePointers(Dtor->getParent());
+
+ if (isTryBody)
+ EmitStmt(cast<CXXTryStmt>(Body)->getTryBlock());
+ else if (Body)
+ EmitStmt(Body);
+ else {
+ assert(Dtor->isImplicit() && "bodyless dtor not implicit");
+ // nothing to do besides what's in the epilogue
+ }
+ // -fapple-kext must inline any call to this dtor into
+ // the caller's body.
+ if (getContext().getLangOpts().AppleKext)
+ CurFn->addFnAttr(llvm::Attribute::AlwaysInline);
+ break;
+ }
+
+ // Jump out through the epilogue cleanups.
+ DtorEpilogue.ForceCleanup();
+
+ // Exit the try if applicable.
+ if (isTryBody)
+ ExitCXXTryStmt(*cast<CXXTryStmt>(Body), true);
+}
+
+namespace {
+ /// Call the operator delete associated with the current destructor.
+ struct CallDtorDelete : EHScopeStack::Cleanup {
+ CallDtorDelete() {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CGF.CurCodeDecl);
+ const CXXRecordDecl *ClassDecl = Dtor->getParent();
+ CGF.EmitDeleteCall(Dtor->getOperatorDelete(), CGF.LoadCXXThis(),
+ CGF.getContext().getTagDeclType(ClassDecl));
+ }
+ };
+
+ class DestroyField : public EHScopeStack::Cleanup {
+ const FieldDecl *field;
+ CodeGenFunction::Destroyer *destroyer;
+ bool useEHCleanupForArray;
+
+ public:
+ DestroyField(const FieldDecl *field, CodeGenFunction::Destroyer *destroyer,
+ bool useEHCleanupForArray)
+ : field(field), destroyer(destroyer),
+ useEHCleanupForArray(useEHCleanupForArray) {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ // Find the address of the field.
+ llvm::Value *thisValue = CGF.LoadCXXThis();
+ QualType RecordTy = CGF.getContext().getTagDeclType(field->getParent());
+ LValue ThisLV = CGF.MakeAddrLValue(thisValue, RecordTy);
+ LValue LV = CGF.EmitLValueForField(ThisLV, field);
+ assert(LV.isSimple());
+
+ CGF.emitDestroy(LV.getAddress(), field->getType(), destroyer,
+ flags.isForNormalCleanup() && useEHCleanupForArray);
+ }
+ };
+}
+
+/// EmitDtorEpilogue - Emit all code that comes at the end of class's
+/// destructor. This is to call destructors on members and base classes
+/// in reverse order of their construction.
+void CodeGenFunction::EnterDtorCleanups(const CXXDestructorDecl *DD,
+ CXXDtorType DtorType) {
+ assert(!DD->isTrivial() &&
+ "Should not emit dtor epilogue for trivial dtor!");
+
+ // The deleting-destructor phase just needs to call the appropriate
+ // operator delete that Sema picked up.
+ if (DtorType == Dtor_Deleting) {
+ assert(DD->getOperatorDelete() &&
+ "operator delete missing - EmitDtorEpilogue");
+ EHStack.pushCleanup<CallDtorDelete>(NormalAndEHCleanup);
+ return;
+ }
+
+ const CXXRecordDecl *ClassDecl = DD->getParent();
+
+ // Unions have no bases and do not call field destructors.
+ if (ClassDecl->isUnion())
+ return;
+
+ // The complete-destructor phase just destructs all the virtual bases.
+ if (DtorType == Dtor_Complete) {
+
+ // We push them in the forward order so that they'll be popped in
+ // the reverse order.
+ for (CXXRecordDecl::base_class_const_iterator I =
+ ClassDecl->vbases_begin(), E = ClassDecl->vbases_end();
+ I != E; ++I) {
+ const CXXBaseSpecifier &Base = *I;
+ CXXRecordDecl *BaseClassDecl
+ = cast<CXXRecordDecl>(Base.getType()->getAs<RecordType>()->getDecl());
+
+ // Ignore trivial destructors.
+ if (BaseClassDecl->hasTrivialDestructor())
+ continue;
+
+ EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup,
+ BaseClassDecl,
+ /*BaseIsVirtual*/ true);
+ }
+
+ return;
+ }
+
+ assert(DtorType == Dtor_Base);
+
+ // Destroy non-virtual bases.
+ for (CXXRecordDecl::base_class_const_iterator I =
+ ClassDecl->bases_begin(), E = ClassDecl->bases_end(); I != E; ++I) {
+ const CXXBaseSpecifier &Base = *I;
+
+ // Ignore virtual bases.
+ if (Base.isVirtual())
+ continue;
+
+ CXXRecordDecl *BaseClassDecl = Base.getType()->getAsCXXRecordDecl();
+
+ // Ignore trivial destructors.
+ if (BaseClassDecl->hasTrivialDestructor())
+ continue;
+
+ EHStack.pushCleanup<CallBaseDtor>(NormalAndEHCleanup,
+ BaseClassDecl,
+ /*BaseIsVirtual*/ false);
+ }
+
+ // Destroy direct fields.
+ SmallVector<const FieldDecl *, 16> FieldDecls;
+ for (CXXRecordDecl::field_iterator I = ClassDecl->field_begin(),
+ E = ClassDecl->field_end(); I != E; ++I) {
+ const FieldDecl *field = *I;
+ QualType type = field->getType();
+ QualType::DestructionKind dtorKind = type.isDestructedType();
+ if (!dtorKind) continue;
+
+ // Anonymous union members do not have their destructors called.
+ const RecordType *RT = type->getAsUnionType();
+ if (RT && RT->getDecl()->isAnonymousStructOrUnion()) continue;
+
+ CleanupKind cleanupKind = getCleanupKind(dtorKind);
+ EHStack.pushCleanup<DestroyField>(cleanupKind, field,
+ getDestroyer(dtorKind),
+ cleanupKind & EHCleanup);
+ }
+}
+
+/// EmitCXXAggrConstructorCall - Emit a loop to call a particular
+/// constructor for each of several members of an array.
+///
+/// \param ctor the constructor to call for each element
+/// \param argBegin,argEnd the arguments to evaluate and pass to the
+/// constructor
+/// \param arrayType the type of the array to initialize
+/// \param arrayBegin an arrayType*
+/// \param zeroInitialize true if each element should be
+/// zero-initialized before it is constructed
+void
+CodeGenFunction::EmitCXXAggrConstructorCall(const CXXConstructorDecl *ctor,
+ const ConstantArrayType *arrayType,
+ llvm::Value *arrayBegin,
+ CallExpr::const_arg_iterator argBegin,
+ CallExpr::const_arg_iterator argEnd,
+ bool zeroInitialize) {
+ QualType elementType;
+ llvm::Value *numElements =
+ emitArrayLength(arrayType, elementType, arrayBegin);
+
+ EmitCXXAggrConstructorCall(ctor, numElements, arrayBegin,
+ argBegin, argEnd, zeroInitialize);
+}
+
+/// EmitCXXAggrConstructorCall - Emit a loop to call a particular
+/// constructor for each of several members of an array.
+///
+/// \param ctor the constructor to call for each element
+/// \param numElements the number of elements in the array;
+/// may be zero
+/// \param argBegin,argEnd the arguments to evaluate and pass to the
+/// constructor
+/// \param arrayBegin a T*, where T is the type constructed by ctor
+/// \param zeroInitialize true if each element should be
+/// zero-initialized before it is constructed
+void
+CodeGenFunction::EmitCXXAggrConstructorCall(const CXXConstructorDecl *ctor,
+ llvm::Value *numElements,
+ llvm::Value *arrayBegin,
+ CallExpr::const_arg_iterator argBegin,
+ CallExpr::const_arg_iterator argEnd,
+ bool zeroInitialize) {
+
+ // It's legal for numElements to be zero. This can happen both
+ // dynamically, because x can be zero in 'new A[x]', and statically,
+ // because of GCC extensions that permit zero-length arrays. There
+ // are probably legitimate places where we could assume that this
+ // doesn't happen, but it's not clear that it's worth it.
+ llvm::BranchInst *zeroCheckBranch = 0;
+
+ // Optimize for a constant count.
+ llvm::ConstantInt *constantCount
+ = dyn_cast<llvm::ConstantInt>(numElements);
+ if (constantCount) {
+ // Just skip out if the constant count is zero.
+ if (constantCount->isZero()) return;
+
+ // Otherwise, emit the check.
+ } else {
+ llvm::BasicBlock *loopBB = createBasicBlock("new.ctorloop");
+ llvm::Value *iszero = Builder.CreateIsNull(numElements, "isempty");
+ zeroCheckBranch = Builder.CreateCondBr(iszero, loopBB, loopBB);
+ EmitBlock(loopBB);
+ }
+
+ // Find the end of the array.
+ llvm::Value *arrayEnd = Builder.CreateInBoundsGEP(arrayBegin, numElements,
+ "arrayctor.end");
+
+ // Enter the loop, setting up a phi for the current location to initialize.
+ llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
+ llvm::BasicBlock *loopBB = createBasicBlock("arrayctor.loop");
+ EmitBlock(loopBB);
+ llvm::PHINode *cur = Builder.CreatePHI(arrayBegin->getType(), 2,
+ "arrayctor.cur");
+ cur->addIncoming(arrayBegin, entryBB);
+
+ // Inside the loop body, emit the constructor call on the array element.
+
+ QualType type = getContext().getTypeDeclType(ctor->getParent());
+
+ // Zero initialize the storage, if requested.
+ if (zeroInitialize)
+ EmitNullInitialization(cur, type);
+
+ // C++ [class.temporary]p4:
+ // There are two contexts in which temporaries are destroyed at a different
+ // point than the end of the full-expression. The first context is when a
+ // default constructor is called to initialize an element of an array.
+ // If the constructor has one or more default arguments, the destruction of
+ // every temporary created in a default argument expression is sequenced
+ // before the construction of the next array element, if any.
+
+ {
+ RunCleanupsScope Scope(*this);
+
+ // Evaluate the constructor and its arguments in a regular
+ // partial-destroy cleanup.
+ if (getLangOpts().Exceptions &&
+ !ctor->getParent()->hasTrivialDestructor()) {
+ Destroyer *destroyer = destroyCXXObject;
+ pushRegularPartialArrayCleanup(arrayBegin, cur, type, *destroyer);
+ }
+
+ EmitCXXConstructorCall(ctor, Ctor_Complete, /*ForVirtualBase=*/ false,
+ cur, argBegin, argEnd);
+ }
+
+ // Go to the next element.
+ llvm::Value *next =
+ Builder.CreateInBoundsGEP(cur, llvm::ConstantInt::get(SizeTy, 1),
+ "arrayctor.next");
+ cur->addIncoming(next, Builder.GetInsertBlock());
+
+ // Check whether that's the end of the loop.
+ llvm::Value *done = Builder.CreateICmpEQ(next, arrayEnd, "arrayctor.done");
+ llvm::BasicBlock *contBB = createBasicBlock("arrayctor.cont");
+ Builder.CreateCondBr(done, contBB, loopBB);
+
+ // Patch the earlier check to skip over the loop.
+ if (zeroCheckBranch) zeroCheckBranch->setSuccessor(0, contBB);
+
+ EmitBlock(contBB);
+}
+
+void CodeGenFunction::destroyCXXObject(CodeGenFunction &CGF,
+ llvm::Value *addr,
+ QualType type) {
+ const RecordType *rtype = type->castAs<RecordType>();
+ const CXXRecordDecl *record = cast<CXXRecordDecl>(rtype->getDecl());
+ const CXXDestructorDecl *dtor = record->getDestructor();
+ assert(!dtor->isTrivial());
+ CGF.EmitCXXDestructorCall(dtor, Dtor_Complete, /*for vbase*/ false,
+ addr);
+}
+
+void
+CodeGenFunction::EmitCXXConstructorCall(const CXXConstructorDecl *D,
+ CXXCtorType Type, bool ForVirtualBase,
+ llvm::Value *This,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd) {
+
+ CGDebugInfo *DI = getDebugInfo();
+ if (DI && CGM.getCodeGenOpts().LimitDebugInfo) {
+ // If debug info for this class has not been emitted then this is the
+ // right time to do so.
+ const CXXRecordDecl *Parent = D->getParent();
+ DI->getOrCreateRecordType(CGM.getContext().getTypeDeclType(Parent),
+ Parent->getLocation());
+ }
+
+ if (D->isTrivial()) {
+ if (ArgBeg == ArgEnd) {
+ // Trivial default constructor, no codegen required.
+ assert(D->isDefaultConstructor() &&
+ "trivial 0-arg ctor not a default ctor");
+ return;
+ }
+
+ assert(ArgBeg + 1 == ArgEnd && "unexpected argcount for trivial ctor");
+ assert(D->isCopyOrMoveConstructor() &&
+ "trivial 1-arg ctor not a copy/move ctor");
+
+ const Expr *E = (*ArgBeg);
+ QualType Ty = E->getType();
+ llvm::Value *Src = EmitLValue(E).getAddress();
+ EmitAggregateCopy(This, Src, Ty);
+ return;
+ }
+
+ llvm::Value *VTT = GetVTTParameter(*this, GlobalDecl(D, Type), ForVirtualBase);
+ llvm::Value *Callee = CGM.GetAddrOfCXXConstructor(D, Type);
+
+ EmitCXXMemberCall(D, Callee, ReturnValueSlot(), This, VTT, ArgBeg, ArgEnd);
+}
+
+void
+CodeGenFunction::EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D,
+ llvm::Value *This, llvm::Value *Src,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd) {
+ if (D->isTrivial()) {
+ assert(ArgBeg + 1 == ArgEnd && "unexpected argcount for trivial ctor");
+ assert(D->isCopyOrMoveConstructor() &&
+ "trivial 1-arg ctor not a copy/move ctor");
+ EmitAggregateCopy(This, Src, (*ArgBeg)->getType());
+ return;
+ }
+ llvm::Value *Callee = CGM.GetAddrOfCXXConstructor(D,
+ clang::Ctor_Complete);
+ assert(D->isInstance() &&
+ "Trying to emit a member call expr on a static method!");
+
+ const FunctionProtoType *FPT = D->getType()->getAs<FunctionProtoType>();
+
+ CallArgList Args;
+
+ // Push the this ptr.
+ Args.add(RValue::get(This), D->getThisType(getContext()));
+
+
+ // Push the src ptr.
+ QualType QT = *(FPT->arg_type_begin());
+ llvm::Type *t = CGM.getTypes().ConvertType(QT);
+ Src = Builder.CreateBitCast(Src, t);
+ Args.add(RValue::get(Src), QT);
+
+ // Skip over first argument (Src).
+ ++ArgBeg;
+ CallExpr::const_arg_iterator Arg = ArgBeg;
+ for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin()+1,
+ E = FPT->arg_type_end(); I != E; ++I, ++Arg) {
+ assert(Arg != ArgEnd && "Running over edge of argument list!");
+ EmitCallArg(Args, *Arg, *I);
+ }
+ // Either we've emitted all the call args, or we have a call to a
+ // variadic function.
+ assert((Arg == ArgEnd || FPT->isVariadic()) &&
+ "Extra arguments in non-variadic function!");
+ // If we still have any arguments, emit them using the type of the argument.
+ for (; Arg != ArgEnd; ++Arg) {
+ QualType ArgType = Arg->getType();
+ EmitCallArg(Args, *Arg, ArgType);
+ }
+
+ EmitCall(CGM.getTypes().arrangeFunctionCall(Args, FPT), Callee,
+ ReturnValueSlot(), Args, D);
+}
+
+void
+CodeGenFunction::EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
+ CXXCtorType CtorType,
+ const FunctionArgList &Args) {
+ CallArgList DelegateArgs;
+
+ FunctionArgList::const_iterator I = Args.begin(), E = Args.end();
+ assert(I != E && "no parameters to constructor");
+
+ // this
+ DelegateArgs.add(RValue::get(LoadCXXThis()), (*I)->getType());
+ ++I;
+
+ // vtt
+ if (llvm::Value *VTT = GetVTTParameter(*this, GlobalDecl(Ctor, CtorType),
+ /*ForVirtualBase=*/false)) {
+ QualType VoidPP = getContext().getPointerType(getContext().VoidPtrTy);
+ DelegateArgs.add(RValue::get(VTT), VoidPP);
+
+ if (CodeGenVTables::needsVTTParameter(CurGD)) {
+ assert(I != E && "cannot skip vtt parameter, already done with args");
+ assert((*I)->getType() == VoidPP && "skipping parameter not of vtt type");
+ ++I;
+ }
+ }
+
+ // Explicit arguments.
+ for (; I != E; ++I) {
+ const VarDecl *param = *I;
+ EmitDelegateCallArg(DelegateArgs, param);
+ }
+
+ EmitCall(CGM.getTypes().arrangeCXXConstructorDeclaration(Ctor, CtorType),
+ CGM.GetAddrOfCXXConstructor(Ctor, CtorType),
+ ReturnValueSlot(), DelegateArgs, Ctor);
+}
+
+namespace {
+ struct CallDelegatingCtorDtor : EHScopeStack::Cleanup {
+ const CXXDestructorDecl *Dtor;
+ llvm::Value *Addr;
+ CXXDtorType Type;
+
+ CallDelegatingCtorDtor(const CXXDestructorDecl *D, llvm::Value *Addr,
+ CXXDtorType Type)
+ : Dtor(D), Addr(Addr), Type(Type) {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ CGF.EmitCXXDestructorCall(Dtor, Type, /*ForVirtualBase=*/false,
+ Addr);
+ }
+ };
+}
+
+void
+CodeGenFunction::EmitDelegatingCXXConstructorCall(const CXXConstructorDecl *Ctor,
+ const FunctionArgList &Args) {
+ assert(Ctor->isDelegatingConstructor());
+
+ llvm::Value *ThisPtr = LoadCXXThis();
+
+ QualType Ty = getContext().getTagDeclType(Ctor->getParent());
+ CharUnits Alignment = getContext().getTypeAlignInChars(Ty);
+ AggValueSlot AggSlot =
+ AggValueSlot::forAddr(ThisPtr, Alignment, Qualifiers(),
+ AggValueSlot::IsDestructed,
+ AggValueSlot::DoesNotNeedGCBarriers,
+ AggValueSlot::IsNotAliased);
+
+ EmitAggExpr(Ctor->init_begin()[0]->getInit(), AggSlot);
+
+ const CXXRecordDecl *ClassDecl = Ctor->getParent();
+ if (CGM.getLangOpts().Exceptions && !ClassDecl->hasTrivialDestructor()) {
+ CXXDtorType Type =
+ CurGD.getCtorType() == Ctor_Complete ? Dtor_Complete : Dtor_Base;
+
+ EHStack.pushCleanup<CallDelegatingCtorDtor>(EHCleanup,
+ ClassDecl->getDestructor(),
+ ThisPtr, Type);
+ }
+}
+
+void CodeGenFunction::EmitCXXDestructorCall(const CXXDestructorDecl *DD,
+ CXXDtorType Type,
+ bool ForVirtualBase,
+ llvm::Value *This) {
+ llvm::Value *VTT = GetVTTParameter(*this, GlobalDecl(DD, Type),
+ ForVirtualBase);
+ llvm::Value *Callee = 0;
+ if (getContext().getLangOpts().AppleKext)
+ Callee = BuildAppleKextVirtualDestructorCall(DD, Type,
+ DD->getParent());
+
+ if (!Callee)
+ Callee = CGM.GetAddrOfCXXDestructor(DD, Type);
+
+ EmitCXXMemberCall(DD, Callee, ReturnValueSlot(), This, VTT, 0, 0);
+}
+
+namespace {
+ struct CallLocalDtor : EHScopeStack::Cleanup {
+ const CXXDestructorDecl *Dtor;
+ llvm::Value *Addr;
+
+ CallLocalDtor(const CXXDestructorDecl *D, llvm::Value *Addr)
+ : Dtor(D), Addr(Addr) {}
+
+ void Emit(CodeGenFunction &CGF, Flags flags) {
+ CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete,
+ /*ForVirtualBase=*/false, Addr);
+ }
+ };
+}
+
+void CodeGenFunction::PushDestructorCleanup(const CXXDestructorDecl *D,
+ llvm::Value *Addr) {
+ EHStack.pushCleanup<CallLocalDtor>(NormalAndEHCleanup, D, Addr);
+}
+
+void CodeGenFunction::PushDestructorCleanup(QualType T, llvm::Value *Addr) {
+ CXXRecordDecl *ClassDecl = T->getAsCXXRecordDecl();
+ if (!ClassDecl) return;
+ if (ClassDecl->hasTrivialDestructor()) return;
+
+ const CXXDestructorDecl *D = ClassDecl->getDestructor();
+ assert(D && D->isUsed() && "destructor not marked as used!");
+ PushDestructorCleanup(D, Addr);
+}
+
+llvm::Value *
+CodeGenFunction::GetVirtualBaseClassOffset(llvm::Value *This,
+ const CXXRecordDecl *ClassDecl,
+ const CXXRecordDecl *BaseClassDecl) {
+ llvm::Value *VTablePtr = GetVTablePtr(This, Int8PtrTy);
+ CharUnits VBaseOffsetOffset =
+ CGM.getVTableContext().getVirtualBaseOffsetOffset(ClassDecl, BaseClassDecl);
+
+ llvm::Value *VBaseOffsetPtr =
+ Builder.CreateConstGEP1_64(VTablePtr, VBaseOffsetOffset.getQuantity(),
+ "vbase.offset.ptr");
+ llvm::Type *PtrDiffTy =
+ ConvertType(getContext().getPointerDiffType());
+
+ VBaseOffsetPtr = Builder.CreateBitCast(VBaseOffsetPtr,
+ PtrDiffTy->getPointerTo());
+
+ llvm::Value *VBaseOffset = Builder.CreateLoad(VBaseOffsetPtr, "vbase.offset");
+
+ return VBaseOffset;
+}
+
+void
+CodeGenFunction::InitializeVTablePointer(BaseSubobject Base,
+ const CXXRecordDecl *NearestVBase,
+ CharUnits OffsetFromNearestVBase,
+ llvm::Constant *VTable,
+ const CXXRecordDecl *VTableClass) {
+ const CXXRecordDecl *RD = Base.getBase();
+
+ // Compute the address point.
+ llvm::Value *VTableAddressPoint;
+
+ // Check if we need to use a vtable from the VTT.
+ if (CodeGenVTables::needsVTTParameter(CurGD) &&
+ (RD->getNumVBases() || NearestVBase)) {
+ // Get the secondary vpointer index.
+ uint64_t VirtualPointerIndex =
+ CGM.getVTables().getSecondaryVirtualPointerIndex(VTableClass, Base);
+
+ /// Load the VTT.
+ llvm::Value *VTT = LoadCXXVTT();
+ if (VirtualPointerIndex)
+ VTT = Builder.CreateConstInBoundsGEP1_64(VTT, VirtualPointerIndex);
+
+ // And load the address point from the VTT.
+ VTableAddressPoint = Builder.CreateLoad(VTT);
+ } else {
+ uint64_t AddressPoint =
+ CGM.getVTableContext().getVTableLayout(VTableClass).getAddressPoint(Base);
+ VTableAddressPoint =
+ Builder.CreateConstInBoundsGEP2_64(VTable, 0, AddressPoint);
+ }
+
+ // Compute where to store the address point.
+ llvm::Value *VirtualOffset = 0;
+ CharUnits NonVirtualOffset = CharUnits::Zero();
+
+ if (CodeGenVTables::needsVTTParameter(CurGD) && NearestVBase) {
+ // We need to use the virtual base offset offset because the virtual base
+ // might have a different offset in the most derived class.
+ VirtualOffset = GetVirtualBaseClassOffset(LoadCXXThis(), VTableClass,
+ NearestVBase);
+ NonVirtualOffset = OffsetFromNearestVBase;
+ } else {
+ // We can just use the base offset in the complete class.
+ NonVirtualOffset = Base.getBaseOffset();
+ }
+
+ // Apply the offsets.
+ llvm::Value *VTableField = LoadCXXThis();
+
+ if (!NonVirtualOffset.isZero() || VirtualOffset)
+ VTableField = ApplyNonVirtualAndVirtualOffset(*this, VTableField,
+ NonVirtualOffset,
+ VirtualOffset);
+
+ // Finally, store the address point.
+ llvm::Type *AddressPointPtrTy =
+ VTableAddressPoint->getType()->getPointerTo();
+ VTableField = Builder.CreateBitCast(VTableField, AddressPointPtrTy);
+ llvm::StoreInst *Store = Builder.CreateStore(VTableAddressPoint, VTableField);
+ CGM.DecorateInstruction(Store, CGM.getTBAAInfoForVTablePtr());
+}
+
+void
+CodeGenFunction::InitializeVTablePointers(BaseSubobject Base,
+ const CXXRecordDecl *NearestVBase,
+ CharUnits OffsetFromNearestVBase,
+ bool BaseIsNonVirtualPrimaryBase,
+ llvm::Constant *VTable,
+ const CXXRecordDecl *VTableClass,
+ VisitedVirtualBasesSetTy& VBases) {
+ // If this base is a non-virtual primary base the address point has already
+ // been set.
+ if (!BaseIsNonVirtualPrimaryBase) {
+ // Initialize the vtable pointer for this base.
+ InitializeVTablePointer(Base, NearestVBase, OffsetFromNearestVBase,
+ VTable, VTableClass);
+ }
+
+ const CXXRecordDecl *RD = Base.getBase();
+
+ // Traverse bases.
+ for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
+ E = RD->bases_end(); I != E; ++I) {
+ CXXRecordDecl *BaseDecl
+ = cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());
+
+ // Ignore classes without a vtable.
+ if (!BaseDecl->isDynamicClass())
+ continue;
+
+ CharUnits BaseOffset;
+ CharUnits BaseOffsetFromNearestVBase;
+ bool BaseDeclIsNonVirtualPrimaryBase;
+
+ if (I->isVirtual()) {
+ // Check if we've visited this virtual base before.
+ if (!VBases.insert(BaseDecl))
+ continue;
+
+ const ASTRecordLayout &Layout =
+ getContext().getASTRecordLayout(VTableClass);
+
+ BaseOffset = Layout.getVBaseClassOffset(BaseDecl);
+ BaseOffsetFromNearestVBase = CharUnits::Zero();
+ BaseDeclIsNonVirtualPrimaryBase = false;
+ } else {
+ const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD);
+
+ BaseOffset = Base.getBaseOffset() + Layout.getBaseClassOffset(BaseDecl);
+ BaseOffsetFromNearestVBase =
+ OffsetFromNearestVBase + Layout.getBaseClassOffset(BaseDecl);
+ BaseDeclIsNonVirtualPrimaryBase = Layout.getPrimaryBase() == BaseDecl;
+ }
+
+ InitializeVTablePointers(BaseSubobject(BaseDecl, BaseOffset),
+ I->isVirtual() ? BaseDecl : NearestVBase,
+ BaseOffsetFromNearestVBase,
+ BaseDeclIsNonVirtualPrimaryBase,
+ VTable, VTableClass, VBases);
+ }
+}
+
+void CodeGenFunction::InitializeVTablePointers(const CXXRecordDecl *RD) {
+ // Ignore classes without a vtable.
+ if (!RD->isDynamicClass())
+ return;
+
+ // Get the VTable.
+ llvm::Constant *VTable = CGM.getVTables().GetAddrOfVTable(RD);
+
+ // Initialize the vtable pointers for this class and all of its bases.
+ VisitedVirtualBasesSetTy VBases;
+ InitializeVTablePointers(BaseSubobject(RD, CharUnits::Zero()),
+ /*NearestVBase=*/0,
+ /*OffsetFromNearestVBase=*/CharUnits::Zero(),
+ /*BaseIsNonVirtualPrimaryBase=*/false,
+ VTable, RD, VBases);
+}
+
+llvm::Value *CodeGenFunction::GetVTablePtr(llvm::Value *This,
+ llvm::Type *Ty) {
+ llvm::Value *VTablePtrSrc = Builder.CreateBitCast(This, Ty->getPointerTo());
+ llvm::Instruction *VTable = Builder.CreateLoad(VTablePtrSrc, "vtable");
+ CGM.DecorateInstruction(VTable, CGM.getTBAAInfoForVTablePtr());
+ return VTable;
+}
+
+static const CXXRecordDecl *getMostDerivedClassDecl(const Expr *Base) {
+ const Expr *E = Base;
+
+ while (true) {
+ E = E->IgnoreParens();
+ if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
+ if (CE->getCastKind() == CK_DerivedToBase ||
+ CE->getCastKind() == CK_UncheckedDerivedToBase ||
+ CE->getCastKind() == CK_NoOp) {
+ E = CE->getSubExpr();
+ continue;
+ }
+ }
+
+ break;
+ }
+
+ QualType DerivedType = E->getType();
+ if (const PointerType *PTy = DerivedType->getAs<PointerType>())
+ DerivedType = PTy->getPointeeType();
+
+ return cast<CXXRecordDecl>(DerivedType->castAs<RecordType>()->getDecl());
+}
+
+// FIXME: Ideally Expr::IgnoreParenNoopCasts should do this, but it doesn't do
+// quite what we want.
+static const Expr *skipNoOpCastsAndParens(const Expr *E) {
+ while (true) {
+ if (const ParenExpr *PE = dyn_cast<ParenExpr>(E)) {
+ E = PE->getSubExpr();
+ continue;
+ }
+
+ if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
+ if (CE->getCastKind() == CK_NoOp) {
+ E = CE->getSubExpr();
+ continue;
+ }
+ }
+ if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
+ if (UO->getOpcode() == UO_Extension) {
+ E = UO->getSubExpr();
+ continue;
+ }
+ }
+ return E;
+ }
+}
+
+/// canDevirtualizeMemberFunctionCall - Checks whether the given virtual member
+/// function call on the given expr can be devirtualized.
+static bool canDevirtualizeMemberFunctionCall(const Expr *Base,
+ const CXXMethodDecl *MD) {
+ // If the most derived class is marked final, we know that no subclass can
+ // override this member function and so we can devirtualize it. For example:
+ //
+ // struct A { virtual void f(); }
+ // struct B final : A { };
+ //
+ // void f(B *b) {
+ // b->f();
+ // }
+ //
+ const CXXRecordDecl *MostDerivedClassDecl = getMostDerivedClassDecl(Base);
+ if (MostDerivedClassDecl->hasAttr<FinalAttr>())
+ return true;
+
+ // If the member function is marked 'final', we know that it can't be
+ // overridden and can therefore devirtualize it.
+ if (MD->hasAttr<FinalAttr>())
+ return true;
+
+ // Similarly, if the class itself is marked 'final' it can't be overridden
+ // and we can therefore devirtualize the member function call.
+ if (MD->getParent()->hasAttr<FinalAttr>())
+ return true;
+
+ Base = skipNoOpCastsAndParens(Base);
+ if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) {
+ if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) {
+ // This is a record decl. We know the type and can devirtualize it.
+ return VD->getType()->isRecordType();
+ }
+
+ return false;
+ }
+
+ // We can always devirtualize calls on temporary object expressions.
+ if (isa<CXXConstructExpr>(Base))
+ return true;
+
+ // And calls on bound temporaries.
+ if (isa<CXXBindTemporaryExpr>(Base))
+ return true;
+
+ // Check if this is a call expr that returns a record type.
+ if (const CallExpr *CE = dyn_cast<CallExpr>(Base))
+ return CE->getCallReturnType()->isRecordType();
+
+ // We can't devirtualize the call.
+ return false;
+}
+
+static bool UseVirtualCall(ASTContext &Context,
+ const CXXOperatorCallExpr *CE,
+ const CXXMethodDecl *MD) {
+ if (!MD->isVirtual())
+ return false;
+
+ // When building with -fapple-kext, all calls must go through the vtable since
+ // the kernel linker can do runtime patching of vtables.
+ if (Context.getLangOpts().AppleKext)
+ return true;
+
+ return !canDevirtualizeMemberFunctionCall(CE->getArg(0), MD);
+}
+
+llvm::Value *
+CodeGenFunction::EmitCXXOperatorMemberCallee(const CXXOperatorCallExpr *E,
+ const CXXMethodDecl *MD,
+ llvm::Value *This) {
+ llvm::FunctionType *fnType =
+ CGM.getTypes().GetFunctionType(
+ CGM.getTypes().arrangeCXXMethodDeclaration(MD));
+
+ if (UseVirtualCall(getContext(), E, MD))
+ return BuildVirtualCall(MD, This, fnType);
+
+ return CGM.GetAddrOfFunction(MD, fnType);
+}
+
+void CodeGenFunction::EmitForwardingCallToLambda(const CXXRecordDecl *Lambda,
+ CallArgList &CallArgs) {
+ // Lookup the call operator
+ DeclarationName Name
+ = getContext().DeclarationNames.getCXXOperatorName(OO_Call);
+ DeclContext::lookup_const_result Calls = Lambda->lookup(Name);
+ CXXMethodDecl *CallOperator = cast<CXXMethodDecl>(*Calls.first++);
+ const FunctionProtoType *FPT =
+ CallOperator->getType()->getAs<FunctionProtoType>();
+ QualType ResultType = FPT->getResultType();
+
+ // Get the address of the call operator.
+ GlobalDecl GD(CallOperator);
+ const CGFunctionInfo &CalleeFnInfo =
+ CGM.getTypes().arrangeFunctionCall(ResultType, CallArgs, FPT->getExtInfo(),
+ RequiredArgs::forPrototypePlus(FPT, 1));
+ llvm::Type *Ty = CGM.getTypes().GetFunctionType(CalleeFnInfo);
+ llvm::Value *Callee = CGM.GetAddrOfFunction(GD, Ty);
+
+ // Determine whether we have a return value slot to use.
+ ReturnValueSlot Slot;
+ if (!ResultType->isVoidType() &&
+ CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect &&
+ hasAggregateLLVMType(CurFnInfo->getReturnType()))
+ Slot = ReturnValueSlot(ReturnValue, ResultType.isVolatileQualified());
+
+ // Now emit our call.
+ RValue RV = EmitCall(CalleeFnInfo, Callee, Slot, CallArgs, CallOperator);
+
+ // Forward the returned value
+ if (!ResultType->isVoidType() && Slot.isNull())
+ EmitReturnOfRValue(RV, ResultType);
+}
+
+void CodeGenFunction::EmitLambdaBlockInvokeBody() {
+ const BlockDecl *BD = BlockInfo->getBlockDecl();
+ const VarDecl *variable = BD->capture_begin()->getVariable();
+ const CXXRecordDecl *Lambda = variable->getType()->getAsCXXRecordDecl();
+
+ // Start building arguments for forwarding call
+ CallArgList CallArgs;
+
+ QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
+ llvm::Value *ThisPtr = GetAddrOfBlockDecl(variable, false);
+ CallArgs.add(RValue::get(ThisPtr), ThisType);
+
+ // Add the rest of the parameters.
+ for (BlockDecl::param_const_iterator I = BD->param_begin(),
+ E = BD->param_end(); I != E; ++I) {
+ ParmVarDecl *param = *I;
+ EmitDelegateCallArg(CallArgs, param);
+ }
+
+ EmitForwardingCallToLambda(Lambda, CallArgs);
+}
+
+void CodeGenFunction::EmitLambdaToBlockPointerBody(FunctionArgList &Args) {
+ if (cast<CXXMethodDecl>(CurFuncDecl)->isVariadic()) {
+ // FIXME: Making this work correctly is nasty because it requires either
+ // cloning the body of the call operator or making the call operator forward.
+ CGM.ErrorUnsupported(CurFuncDecl, "lambda conversion to variadic function");
+ return;
+ }
+
+ EmitFunctionBody(Args);
+}
+
+void CodeGenFunction::EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD) {
+ const CXXRecordDecl *Lambda = MD->getParent();
+
+ // Start building arguments for forwarding call
+ CallArgList CallArgs;
+
+ QualType ThisType = getContext().getPointerType(getContext().getRecordType(Lambda));
+ llvm::Value *ThisPtr = llvm::UndefValue::get(getTypes().ConvertType(ThisType));
+ CallArgs.add(RValue::get(ThisPtr), ThisType);
+
+ // Add the rest of the parameters.
+ for (FunctionDecl::param_const_iterator I = MD->param_begin(),
+ E = MD->param_end(); I != E; ++I) {
+ ParmVarDecl *param = *I;
+ EmitDelegateCallArg(CallArgs, param);
+ }
+
+ EmitForwardingCallToLambda(Lambda, CallArgs);
+}
+
+void CodeGenFunction::EmitLambdaStaticInvokeFunction(const CXXMethodDecl *MD) {
+ if (MD->isVariadic()) {
+ // FIXME: Making this work correctly is nasty because it requires either
+ // cloning the body of the call operator or making the call operator forward.
+ CGM.ErrorUnsupported(MD, "lambda conversion to variadic function");
+ return;
+ }
+
+ EmitLambdaDelegatingInvokeBody(MD);
+}