Check in LLVM r95781.
diff --git a/lib/CodeGen/CGDecl.cpp b/lib/CodeGen/CGDecl.cpp
new file mode 100644
index 0000000..793a220
--- /dev/null
+++ b/lib/CodeGen/CGDecl.cpp
@@ -0,0 +1,728 @@
+//===--- CGDecl.cpp - Emit LLVM Code for declarations ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This contains code to emit Decl nodes as LLVM code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGDebugInfo.h"
+#include "CodeGenFunction.h"
+#include "CodeGenModule.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/CharUnits.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/CodeGen/CodeGenOptions.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Type.h"
+using namespace clang;
+using namespace CodeGen;
+
+
+void CodeGenFunction::EmitDecl(const Decl &D) {
+ switch (D.getKind()) {
+ default:
+ CGM.ErrorUnsupported(&D, "decl");
+ return;
+ case Decl::ParmVar:
+ assert(0 && "Parmdecls should not be in declstmts!");
+ case Decl::Function: // void X();
+ case Decl::Record: // struct/union/class X;
+ case Decl::Enum: // enum X;
+ case Decl::EnumConstant: // enum ? { X = ? }
+ case Decl::CXXRecord: // struct/union/class X; [C++]
+ case Decl::Using: // using X; [C++]
+ case Decl::UsingShadow:
+ case Decl::UsingDirective: // using namespace X; [C++]
+ case Decl::StaticAssert: // static_assert(X, ""); [C++0x]
+ // None of these decls require codegen support.
+ return;
+
+ case Decl::Var: {
+ const VarDecl &VD = cast<VarDecl>(D);
+ assert(VD.isBlockVarDecl() &&
+ "Should not see file-scope variables inside a function!");
+ return EmitBlockVarDecl(VD);
+ }
+
+ case Decl::Typedef: { // typedef int X;
+ const TypedefDecl &TD = cast<TypedefDecl>(D);
+ QualType Ty = TD.getUnderlyingType();
+
+ if (Ty->isVariablyModifiedType())
+ EmitVLASize(Ty);
+ }
+ }
+}
+
+/// EmitBlockVarDecl - This method handles emission of any variable declaration
+/// inside a function, including static vars etc.
+void CodeGenFunction::EmitBlockVarDecl(const VarDecl &D) {
+ if (D.hasAttr<AsmLabelAttr>())
+ CGM.ErrorUnsupported(&D, "__asm__");
+
+ switch (D.getStorageClass()) {
+ case VarDecl::None:
+ case VarDecl::Auto:
+ case VarDecl::Register:
+ return EmitLocalBlockVarDecl(D);
+ case VarDecl::Static: {
+ llvm::GlobalValue::LinkageTypes Linkage =
+ llvm::GlobalValue::InternalLinkage;
+
+ // If this is a static declaration inside an inline function, it must have
+ // weak linkage so that the linker will merge multiple definitions of it.
+ if (getContext().getLangOptions().CPlusPlus) {
+ if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurFuncDecl)) {
+ if (FD->isInlined())
+ Linkage = llvm::GlobalValue::WeakAnyLinkage;
+ }
+ }
+
+ return EmitStaticBlockVarDecl(D, Linkage);
+ }
+ case VarDecl::Extern:
+ case VarDecl::PrivateExtern:
+ // Don't emit it now, allow it to be emitted lazily on its first use.
+ return;
+ }
+
+ assert(0 && "Unknown storage class");
+}
+
+static std::string GetStaticDeclName(CodeGenFunction &CGF, const VarDecl &D,
+ const char *Separator) {
+ CodeGenModule &CGM = CGF.CGM;
+ if (CGF.getContext().getLangOptions().CPlusPlus)
+ return CGM.getMangledName(&D);
+
+ std::string ContextName;
+ if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CGF.CurFuncDecl))
+ ContextName = CGM.getMangledName(FD);
+ else if (isa<ObjCMethodDecl>(CGF.CurFuncDecl))
+ ContextName = CGF.CurFn->getName();
+ else
+ // FIXME: What about in a block??
+ assert(0 && "Unknown context for block var decl");
+
+ return ContextName + Separator + D.getNameAsString();
+}
+
+llvm::GlobalVariable *
+CodeGenFunction::CreateStaticBlockVarDecl(const VarDecl &D,
+ const char *Separator,
+ llvm::GlobalValue::LinkageTypes Linkage) {
+ QualType Ty = D.getType();
+ assert(Ty->isConstantSizeType() && "VLAs can't be static");
+
+ std::string Name = GetStaticDeclName(*this, D, Separator);
+
+ const llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(Ty);
+ llvm::GlobalVariable *GV =
+ new llvm::GlobalVariable(CGM.getModule(), LTy,
+ Ty.isConstant(getContext()), Linkage,
+ CGM.EmitNullConstant(D.getType()), Name, 0,
+ D.isThreadSpecified(), Ty.getAddressSpace());
+ GV->setAlignment(getContext().getDeclAlign(&D).getQuantity());
+ return GV;
+}
+
+/// AddInitializerToGlobalBlockVarDecl - Add the initializer for 'D' to the
+/// global variable that has already been created for it. If the initializer
+/// has a different type than GV does, this may free GV and return a different
+/// one. Otherwise it just returns GV.
+llvm::GlobalVariable *
+CodeGenFunction::AddInitializerToGlobalBlockVarDecl(const VarDecl &D,
+ llvm::GlobalVariable *GV) {
+ llvm::Constant *Init = CGM.EmitConstantExpr(D.getInit(), D.getType(), this);
+
+ // If constant emission failed, then this should be a C++ static
+ // initializer.
+ if (!Init) {
+ if (!getContext().getLangOptions().CPlusPlus)
+ CGM.ErrorUnsupported(D.getInit(), "constant l-value expression");
+ else {
+ // Since we have a static initializer, this global variable can't
+ // be constant.
+ GV->setConstant(false);
+
+ EmitStaticCXXBlockVarDeclInit(D, GV);
+ }
+ return GV;
+ }
+
+ // The initializer may differ in type from the global. Rewrite
+ // the global to match the initializer. (We have to do this
+ // because some types, like unions, can't be completely represented
+ // in the LLVM type system.)
+ if (GV->getType() != Init->getType()) {
+ llvm::GlobalVariable *OldGV = GV;
+
+ GV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(),
+ OldGV->isConstant(),
+ OldGV->getLinkage(), Init, "",
+ 0, D.isThreadSpecified(),
+ D.getType().getAddressSpace());
+
+ // Steal the name of the old global
+ GV->takeName(OldGV);
+
+ // Replace all uses of the old global with the new global
+ llvm::Constant *NewPtrForOldDecl =
+ llvm::ConstantExpr::getBitCast(GV, OldGV->getType());
+ OldGV->replaceAllUsesWith(NewPtrForOldDecl);
+
+ // Erase the old global, since it is no longer used.
+ OldGV->eraseFromParent();
+ }
+
+ GV->setInitializer(Init);
+ return GV;
+}
+
+void CodeGenFunction::EmitStaticBlockVarDecl(const VarDecl &D,
+ llvm::GlobalValue::LinkageTypes Linkage) {
+ llvm::Value *&DMEntry = LocalDeclMap[&D];
+ assert(DMEntry == 0 && "Decl already exists in localdeclmap!");
+
+ llvm::GlobalVariable *GV = CreateStaticBlockVarDecl(D, ".", Linkage);
+
+ // Store into LocalDeclMap before generating initializer to handle
+ // circular references.
+ DMEntry = GV;
+
+ // Make sure to evaluate VLA bounds now so that we have them for later.
+ //
+ // FIXME: Can this happen?
+ if (D.getType()->isVariablyModifiedType())
+ EmitVLASize(D.getType());
+
+ // If this value has an initializer, emit it.
+ if (D.getInit())
+ GV = AddInitializerToGlobalBlockVarDecl(D, GV);
+
+ // FIXME: Merge attribute handling.
+ if (const AnnotateAttr *AA = D.getAttr<AnnotateAttr>()) {
+ SourceManager &SM = CGM.getContext().getSourceManager();
+ llvm::Constant *Ann =
+ CGM.EmitAnnotateAttr(GV, AA,
+ SM.getInstantiationLineNumber(D.getLocation()));
+ CGM.AddAnnotation(Ann);
+ }
+
+ if (const SectionAttr *SA = D.getAttr<SectionAttr>())
+ GV->setSection(SA->getName());
+
+ if (D.hasAttr<UsedAttr>())
+ CGM.AddUsedGlobal(GV);
+
+ // We may have to cast the constant because of the initializer
+ // mismatch above.
+ //
+ // FIXME: It is really dangerous to store this in the map; if anyone
+ // RAUW's the GV uses of this constant will be invalid.
+ const llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(D.getType());
+ const llvm::Type *LPtrTy =
+ llvm::PointerType::get(LTy, D.getType().getAddressSpace());
+ DMEntry = llvm::ConstantExpr::getBitCast(GV, LPtrTy);
+
+ // Emit global variable debug descriptor for static vars.
+ CGDebugInfo *DI = getDebugInfo();
+ if (DI) {
+ DI->setLocation(D.getLocation());
+ DI->EmitGlobalVariable(static_cast<llvm::GlobalVariable *>(GV), &D);
+ }
+}
+
+unsigned CodeGenFunction::getByRefValueLLVMField(const ValueDecl *VD) const {
+ assert(ByRefValueInfo.count(VD) && "Did not find value!");
+
+ return ByRefValueInfo.find(VD)->second.second;
+}
+
+/// BuildByRefType - This routine changes a __block variable declared as T x
+/// into:
+///
+/// struct {
+/// void *__isa;
+/// void *__forwarding;
+/// int32_t __flags;
+/// int32_t __size;
+/// void *__copy_helper; // only if needed
+/// void *__destroy_helper; // only if needed
+/// char padding[X]; // only if needed
+/// T x;
+/// } x
+///
+const llvm::Type *CodeGenFunction::BuildByRefType(const ValueDecl *D) {
+ std::pair<const llvm::Type *, unsigned> &Info = ByRefValueInfo[D];
+ if (Info.first)
+ return Info.first;
+
+ QualType Ty = D->getType();
+
+ std::vector<const llvm::Type *> Types;
+
+ const llvm::PointerType *Int8PtrTy = llvm::Type::getInt8PtrTy(VMContext);
+
+ llvm::PATypeHolder ByRefTypeHolder = llvm::OpaqueType::get(VMContext);
+
+ // void *__isa;
+ Types.push_back(Int8PtrTy);
+
+ // void *__forwarding;
+ Types.push_back(llvm::PointerType::getUnqual(ByRefTypeHolder));
+
+ // int32_t __flags;
+ Types.push_back(llvm::Type::getInt32Ty(VMContext));
+
+ // int32_t __size;
+ Types.push_back(llvm::Type::getInt32Ty(VMContext));
+
+ bool HasCopyAndDispose = BlockRequiresCopying(Ty);
+ if (HasCopyAndDispose) {
+ /// void *__copy_helper;
+ Types.push_back(Int8PtrTy);
+
+ /// void *__destroy_helper;
+ Types.push_back(Int8PtrTy);
+ }
+
+ bool Packed = false;
+ CharUnits Align = getContext().getDeclAlign(D);
+ if (Align > CharUnits::fromQuantity(Target.getPointerAlign(0) / 8)) {
+ // We have to insert padding.
+
+ // The struct above has 2 32-bit integers.
+ unsigned CurrentOffsetInBytes = 4 * 2;
+
+ // And either 2 or 4 pointers.
+ CurrentOffsetInBytes += (HasCopyAndDispose ? 4 : 2) *
+ CGM.getTargetData().getTypeAllocSize(Int8PtrTy);
+
+ // Align the offset.
+ unsigned AlignedOffsetInBytes =
+ llvm::RoundUpToAlignment(CurrentOffsetInBytes, Align.getQuantity());
+
+ unsigned NumPaddingBytes = AlignedOffsetInBytes - CurrentOffsetInBytes;
+ if (NumPaddingBytes > 0) {
+ const llvm::Type *Ty = llvm::Type::getInt8Ty(VMContext);
+ // FIXME: We need a sema error for alignment larger than the minimum of
+ // the maximal stack alignmint and the alignment of malloc on the system.
+ if (NumPaddingBytes > 1)
+ Ty = llvm::ArrayType::get(Ty, NumPaddingBytes);
+
+ Types.push_back(Ty);
+
+ // We want a packed struct.
+ Packed = true;
+ }
+ }
+
+ // T x;
+ Types.push_back(ConvertType(Ty));
+
+ const llvm::Type *T = llvm::StructType::get(VMContext, Types, Packed);
+
+ cast<llvm::OpaqueType>(ByRefTypeHolder.get())->refineAbstractTypeTo(T);
+ CGM.getModule().addTypeName("struct.__block_byref_" + D->getNameAsString(),
+ ByRefTypeHolder.get());
+
+ Info.first = ByRefTypeHolder.get();
+
+ Info.second = Types.size() - 1;
+
+ return Info.first;
+}
+
+/// EmitLocalBlockVarDecl - Emit code and set up an entry in LocalDeclMap for a
+/// variable declaration with auto, register, or no storage class specifier.
+/// These turn into simple stack objects, or GlobalValues depending on target.
+void CodeGenFunction::EmitLocalBlockVarDecl(const VarDecl &D) {
+ QualType Ty = D.getType();
+ bool isByRef = D.hasAttr<BlocksAttr>();
+ bool needsDispose = false;
+ CharUnits Align = CharUnits::Zero();
+ bool IsSimpleConstantInitializer = false;
+
+ llvm::Value *DeclPtr;
+ if (Ty->isConstantSizeType()) {
+ if (!Target.useGlobalsForAutomaticVariables()) {
+
+ // If this value is an array or struct, is POD, and if the initializer is
+ // a staticly determinable constant, try to optimize it.
+ if (D.getInit() && !isByRef &&
+ (Ty->isArrayType() || Ty->isRecordType()) &&
+ Ty->isPODType() &&
+ D.getInit()->isConstantInitializer(getContext())) {
+ // If this variable is marked 'const', emit the value as a global.
+ if (CGM.getCodeGenOpts().MergeAllConstants &&
+ Ty.isConstant(getContext())) {
+ EmitStaticBlockVarDecl(D, llvm::GlobalValue::InternalLinkage);
+ return;
+ }
+
+ IsSimpleConstantInitializer = true;
+ }
+
+ // A normal fixed sized variable becomes an alloca in the entry block.
+ const llvm::Type *LTy = ConvertTypeForMem(Ty);
+ if (isByRef)
+ LTy = BuildByRefType(&D);
+ llvm::AllocaInst *Alloc = CreateTempAlloca(LTy);
+ Alloc->setName(D.getNameAsString());
+
+ Align = getContext().getDeclAlign(&D);
+ if (isByRef)
+ Align = std::max(Align,
+ CharUnits::fromQuantity(Target.getPointerAlign(0) / 8));
+ Alloc->setAlignment(Align.getQuantity());
+ DeclPtr = Alloc;
+ } else {
+ // Targets that don't support recursion emit locals as globals.
+ const char *Class =
+ D.getStorageClass() == VarDecl::Register ? ".reg." : ".auto.";
+ DeclPtr = CreateStaticBlockVarDecl(D, Class,
+ llvm::GlobalValue
+ ::InternalLinkage);
+ }
+
+ // FIXME: Can this happen?
+ if (Ty->isVariablyModifiedType())
+ EmitVLASize(Ty);
+ } else {
+ EnsureInsertPoint();
+
+ if (!DidCallStackSave) {
+ // Save the stack.
+ const llvm::Type *LTy = llvm::Type::getInt8PtrTy(VMContext);
+ llvm::Value *Stack = CreateTempAlloca(LTy, "saved_stack");
+
+ llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::stacksave);
+ llvm::Value *V = Builder.CreateCall(F);
+
+ Builder.CreateStore(V, Stack);
+
+ DidCallStackSave = true;
+
+ {
+ // Push a cleanup block and restore the stack there.
+ DelayedCleanupBlock scope(*this);
+
+ V = Builder.CreateLoad(Stack, "tmp");
+ llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::stackrestore);
+ Builder.CreateCall(F, V);
+ }
+ }
+
+ // Get the element type.
+ const llvm::Type *LElemTy = ConvertTypeForMem(Ty);
+ const llvm::Type *LElemPtrTy =
+ llvm::PointerType::get(LElemTy, D.getType().getAddressSpace());
+
+ llvm::Value *VLASize = EmitVLASize(Ty);
+
+ // Downcast the VLA size expression
+ VLASize = Builder.CreateIntCast(VLASize, llvm::Type::getInt32Ty(VMContext),
+ false, "tmp");
+
+ // Allocate memory for the array.
+ llvm::AllocaInst *VLA =
+ Builder.CreateAlloca(llvm::Type::getInt8Ty(VMContext), VLASize, "vla");
+ VLA->setAlignment(getContext().getDeclAlign(&D).getQuantity());
+
+ DeclPtr = Builder.CreateBitCast(VLA, LElemPtrTy, "tmp");
+ }
+
+ llvm::Value *&DMEntry = LocalDeclMap[&D];
+ assert(DMEntry == 0 && "Decl already exists in localdeclmap!");
+ DMEntry = DeclPtr;
+
+ // Emit debug info for local var declaration.
+ if (CGDebugInfo *DI = getDebugInfo()) {
+ assert(HaveInsertPoint() && "Unexpected unreachable point!");
+
+ DI->setLocation(D.getLocation());
+ if (Target.useGlobalsForAutomaticVariables()) {
+ DI->EmitGlobalVariable(static_cast<llvm::GlobalVariable *>(DeclPtr), &D);
+ } else
+ DI->EmitDeclareOfAutoVariable(&D, DeclPtr, Builder);
+ }
+
+ // If this local has an initializer, emit it now.
+ const Expr *Init = D.getInit();
+
+ // If we are at an unreachable point, we don't need to emit the initializer
+ // unless it contains a label.
+ if (!HaveInsertPoint()) {
+ if (!ContainsLabel(Init))
+ Init = 0;
+ else
+ EnsureInsertPoint();
+ }
+
+ if (Init) {
+ llvm::Value *Loc = DeclPtr;
+ if (isByRef)
+ Loc = Builder.CreateStructGEP(DeclPtr, getByRefValueLLVMField(&D),
+ D.getNameAsString());
+
+ bool isVolatile =
+ getContext().getCanonicalType(D.getType()).isVolatileQualified();
+
+ // If the initializer was a simple constant initializer, we can optimize it
+ // in various ways.
+ if (IsSimpleConstantInitializer) {
+ llvm::Constant *Init = CGM.EmitConstantExpr(D.getInit(),D.getType(),this);
+ assert(Init != 0 && "Wasn't a simple constant init?");
+
+ llvm::Value *AlignVal =
+ llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext),
+ Align.getQuantity());
+ const llvm::Type *IntPtr =
+ llvm::IntegerType::get(VMContext, LLVMPointerWidth);
+ llvm::Value *SizeVal =
+ llvm::ConstantInt::get(IntPtr,
+ getContext().getTypeSizeInChars(Ty).getQuantity());
+
+ const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext);
+ if (Loc->getType() != BP)
+ Loc = Builder.CreateBitCast(Loc, BP, "tmp");
+
+ // If the initializer is all zeros, codegen with memset.
+ if (isa<llvm::ConstantAggregateZero>(Init)) {
+ llvm::Value *Zero =
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(VMContext), 0);
+ Builder.CreateCall4(CGM.getMemSetFn(), Loc, Zero, SizeVal, AlignVal);
+ } else {
+ // Otherwise, create a temporary global with the initializer then
+ // memcpy from the global to the alloca.
+ std::string Name = GetStaticDeclName(*this, D, ".");
+ llvm::GlobalVariable *GV =
+ new llvm::GlobalVariable(CGM.getModule(), Init->getType(), true,
+ llvm::GlobalValue::InternalLinkage,
+ Init, Name, 0, false, 0);
+ GV->setAlignment(Align.getQuantity());
+
+ llvm::Value *SrcPtr = GV;
+ if (SrcPtr->getType() != BP)
+ SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp");
+
+ Builder.CreateCall4(CGM.getMemCpyFn(), Loc, SrcPtr, SizeVal, AlignVal);
+ }
+ } else if (Ty->isReferenceType()) {
+ RValue RV = EmitReferenceBindingToExpr(Init, /*IsInitializer=*/true);
+ EmitStoreOfScalar(RV.getScalarVal(), Loc, false, Ty);
+ } else if (!hasAggregateLLVMType(Init->getType())) {
+ llvm::Value *V = EmitScalarExpr(Init);
+ EmitStoreOfScalar(V, Loc, isVolatile, D.getType());
+ } else if (Init->getType()->isAnyComplexType()) {
+ EmitComplexExprIntoAddr(Init, Loc, isVolatile);
+ } else {
+ EmitAggExpr(Init, Loc, isVolatile);
+ }
+ }
+
+ if (isByRef) {
+ const llvm::PointerType *PtrToInt8Ty = llvm::Type::getInt8PtrTy(VMContext);
+
+ EnsureInsertPoint();
+ llvm::Value *isa_field = Builder.CreateStructGEP(DeclPtr, 0);
+ llvm::Value *forwarding_field = Builder.CreateStructGEP(DeclPtr, 1);
+ llvm::Value *flags_field = Builder.CreateStructGEP(DeclPtr, 2);
+ llvm::Value *size_field = Builder.CreateStructGEP(DeclPtr, 3);
+ llvm::Value *V;
+ int flag = 0;
+ int flags = 0;
+
+ needsDispose = true;
+
+ if (Ty->isBlockPointerType()) {
+ flag |= BLOCK_FIELD_IS_BLOCK;
+ flags |= BLOCK_HAS_COPY_DISPOSE;
+ } else if (BlockRequiresCopying(Ty)) {
+ flag |= BLOCK_FIELD_IS_OBJECT;
+ flags |= BLOCK_HAS_COPY_DISPOSE;
+ }
+
+ // FIXME: Someone double check this.
+ if (Ty.isObjCGCWeak())
+ flag |= BLOCK_FIELD_IS_WEAK;
+
+ int isa = 0;
+ if (flag&BLOCK_FIELD_IS_WEAK)
+ isa = 1;
+ V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), isa);
+ V = Builder.CreateIntToPtr(V, PtrToInt8Ty, "isa");
+ Builder.CreateStore(V, isa_field);
+
+ Builder.CreateStore(DeclPtr, forwarding_field);
+
+ V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), flags);
+ Builder.CreateStore(V, flags_field);
+
+ const llvm::Type *V1;
+ V1 = cast<llvm::PointerType>(DeclPtr->getType())->getElementType();
+ V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext),
+ CGM.GetTargetTypeStoreSize(V1).getQuantity());
+ Builder.CreateStore(V, size_field);
+
+ if (flags & BLOCK_HAS_COPY_DISPOSE) {
+ BlockHasCopyDispose = true;
+ llvm::Value *copy_helper = Builder.CreateStructGEP(DeclPtr, 4);
+ Builder.CreateStore(BuildbyrefCopyHelper(DeclPtr->getType(), flag,
+ Align.getQuantity()),
+ copy_helper);
+
+ llvm::Value *destroy_helper = Builder.CreateStructGEP(DeclPtr, 5);
+ Builder.CreateStore(BuildbyrefDestroyHelper(DeclPtr->getType(), flag,
+ Align.getQuantity()),
+ destroy_helper);
+ }
+ }
+
+ // Handle CXX destruction of variables.
+ QualType DtorTy(Ty);
+ while (const ArrayType *Array = getContext().getAsArrayType(DtorTy))
+ DtorTy = getContext().getBaseElementType(Array);
+ if (const RecordType *RT = DtorTy->getAs<RecordType>())
+ if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
+ if (!ClassDecl->hasTrivialDestructor()) {
+ const CXXDestructorDecl *D = ClassDecl->getDestructor(getContext());
+ assert(D && "EmitLocalBlockVarDecl - destructor is nul");
+
+ if (const ConstantArrayType *Array =
+ getContext().getAsConstantArrayType(Ty)) {
+ {
+ DelayedCleanupBlock Scope(*this);
+ QualType BaseElementTy = getContext().getBaseElementType(Array);
+ const llvm::Type *BasePtr = ConvertType(BaseElementTy);
+ BasePtr = llvm::PointerType::getUnqual(BasePtr);
+ llvm::Value *BaseAddrPtr =
+ Builder.CreateBitCast(DeclPtr, BasePtr);
+ EmitCXXAggrDestructorCall(D, Array, BaseAddrPtr);
+
+ // Make sure to jump to the exit block.
+ EmitBranch(Scope.getCleanupExitBlock());
+ }
+ if (Exceptions) {
+ EHCleanupBlock Cleanup(*this);
+ QualType BaseElementTy = getContext().getBaseElementType(Array);
+ const llvm::Type *BasePtr = ConvertType(BaseElementTy);
+ BasePtr = llvm::PointerType::getUnqual(BasePtr);
+ llvm::Value *BaseAddrPtr =
+ Builder.CreateBitCast(DeclPtr, BasePtr);
+ EmitCXXAggrDestructorCall(D, Array, BaseAddrPtr);
+ }
+ } else {
+ {
+ DelayedCleanupBlock Scope(*this);
+ EmitCXXDestructorCall(D, Dtor_Complete, DeclPtr);
+
+ // Make sure to jump to the exit block.
+ EmitBranch(Scope.getCleanupExitBlock());
+ }
+ if (Exceptions) {
+ EHCleanupBlock Cleanup(*this);
+ EmitCXXDestructorCall(D, Dtor_Complete, DeclPtr);
+ }
+ }
+ }
+ }
+
+ // Handle the cleanup attribute
+ if (const CleanupAttr *CA = D.getAttr<CleanupAttr>()) {
+ const FunctionDecl *FD = CA->getFunctionDecl();
+
+ llvm::Constant* F = CGM.GetAddrOfFunction(FD);
+ assert(F && "Could not find function!");
+
+ const CGFunctionInfo &Info = CGM.getTypes().getFunctionInfo(FD);
+
+ // In some cases, the type of the function argument will be different from
+ // the type of the pointer. An example of this is
+ // void f(void* arg);
+ // __attribute__((cleanup(f))) void *g;
+ //
+ // To fix this we insert a bitcast here.
+ QualType ArgTy = Info.arg_begin()->type;
+ {
+ DelayedCleanupBlock scope(*this);
+
+ CallArgList Args;
+ Args.push_back(std::make_pair(RValue::get(Builder.CreateBitCast(DeclPtr,
+ ConvertType(ArgTy))),
+ getContext().getPointerType(D.getType())));
+ EmitCall(Info, F, ReturnValueSlot(), Args);
+ }
+ if (Exceptions) {
+ EHCleanupBlock Cleanup(*this);
+
+ CallArgList Args;
+ Args.push_back(std::make_pair(RValue::get(Builder.CreateBitCast(DeclPtr,
+ ConvertType(ArgTy))),
+ getContext().getPointerType(D.getType())));
+ EmitCall(Info, F, ReturnValueSlot(), Args);
+ }
+ }
+
+ if (needsDispose && CGM.getLangOptions().getGCMode() != LangOptions::GCOnly) {
+ {
+ DelayedCleanupBlock scope(*this);
+ llvm::Value *V = Builder.CreateStructGEP(DeclPtr, 1, "forwarding");
+ V = Builder.CreateLoad(V);
+ BuildBlockRelease(V);
+ }
+ // FIXME: Turn this on and audit the codegen
+ if (0 && Exceptions) {
+ EHCleanupBlock Cleanup(*this);
+ llvm::Value *V = Builder.CreateStructGEP(DeclPtr, 1, "forwarding");
+ V = Builder.CreateLoad(V);
+ BuildBlockRelease(V);
+ }
+ }
+}
+
+/// Emit an alloca (or GlobalValue depending on target)
+/// for the specified parameter and set up LocalDeclMap.
+void CodeGenFunction::EmitParmDecl(const VarDecl &D, llvm::Value *Arg) {
+ // FIXME: Why isn't ImplicitParamDecl a ParmVarDecl?
+ assert((isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) &&
+ "Invalid argument to EmitParmDecl");
+ QualType Ty = D.getType();
+ CanQualType CTy = getContext().getCanonicalType(Ty);
+
+ llvm::Value *DeclPtr;
+ // If this is an aggregate or variable sized value, reuse the input pointer.
+ if (!Ty->isConstantSizeType() ||
+ CodeGenFunction::hasAggregateLLVMType(Ty)) {
+ DeclPtr = Arg;
+ } else {
+ // Otherwise, create a temporary to hold the value.
+ DeclPtr = CreateMemTemp(Ty, D.getName() + ".addr");
+
+ // Store the initial value into the alloca.
+ EmitStoreOfScalar(Arg, DeclPtr, CTy.isVolatileQualified(), Ty);
+ }
+ Arg->setName(D.getName());
+
+ llvm::Value *&DMEntry = LocalDeclMap[&D];
+ assert(DMEntry == 0 && "Decl already exists in localdeclmap!");
+ DMEntry = DeclPtr;
+
+ // Emit debug info for param declaration.
+ if (CGDebugInfo *DI = getDebugInfo()) {
+ DI->setLocation(D.getLocation());
+ DI->EmitDeclareOfArgVariable(&D, DeclPtr, Builder);
+ }
+}