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authorrdivacky <rdivacky@FreeBSD.org>2010-01-15 15:39:40 +0000
committerrdivacky <rdivacky@FreeBSD.org>2010-01-15 15:39:40 +0000
commita3fa5c7f1b5e2ba4d6ec033dc0e2376326b05824 (patch)
treea6082d4d1d1e9ddaea09a6a04bb4a47da95d642d /lib/CodeGen/CGCXX.cpp
parentbb1e3bc1e0be2b8f891db46457a8943451bf4d8b (diff)
downloadFreeBSD-src-a3fa5c7f1b5e2ba4d6ec033dc0e2376326b05824.zip
FreeBSD-src-a3fa5c7f1b5e2ba4d6ec033dc0e2376326b05824.tar.gz
Update clang to r93512.
Diffstat (limited to 'lib/CodeGen/CGCXX.cpp')
-rw-r--r--lib/CodeGen/CGCXX.cpp671
1 files changed, 0 insertions, 671 deletions
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index cc006d9..4323f84 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -26,269 +26,7 @@
using namespace clang;
using namespace CodeGen;
-RValue CodeGenFunction::EmitCXXMemberCall(const CXXMethodDecl *MD,
- llvm::Value *Callee,
- ReturnValueSlot ReturnValue,
- llvm::Value *This,
- CallExpr::const_arg_iterator ArgBeg,
- CallExpr::const_arg_iterator ArgEnd) {
- assert(MD->isInstance() &&
- "Trying to emit a member call expr on a static method!");
- const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
-
- CallArgList Args;
-
- // Push the this ptr.
- Args.push_back(std::make_pair(RValue::get(This),
- MD->getThisType(getContext())));
-
- // And the rest of the call args
- EmitCallArgs(Args, FPT, ArgBeg, ArgEnd);
-
- QualType ResultType = MD->getType()->getAs<FunctionType>()->getResultType();
- return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args), Callee,
- ReturnValue, Args, MD);
-}
-
-/// canDevirtualizeMemberFunctionCalls - Checks whether virtual calls on given
-/// expr can be devirtualized.
-static bool canDevirtualizeMemberFunctionCalls(const Expr *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<CXXTemporaryObjectExpr>(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;
-}
-
-RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
- ReturnValueSlot ReturnValue) {
- if (isa<BinaryOperator>(CE->getCallee()->IgnoreParens()))
- return EmitCXXMemberPointerCallExpr(CE, ReturnValue);
-
- const MemberExpr *ME = cast<MemberExpr>(CE->getCallee()->IgnoreParens());
- const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl());
-
- if (MD->isStatic()) {
- // The method is static, emit it as we would a regular call.
- llvm::Value *Callee = CGM.GetAddrOfFunction(MD);
- return EmitCall(getContext().getPointerType(MD->getType()), Callee,
- ReturnValue, CE->arg_begin(), CE->arg_end());
- }
-
- const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
-
- const llvm::Type *Ty =
- CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(MD),
- FPT->isVariadic());
- llvm::Value *This;
-
- if (ME->isArrow())
- This = EmitScalarExpr(ME->getBase());
- else {
- LValue BaseLV = EmitLValue(ME->getBase());
- This = BaseLV.getAddress();
- }
-
- if (MD->isCopyAssignment() && MD->isTrivial()) {
- // We don't like to generate the trivial copy assignment operator when
- // it isn't necessary; just produce the proper effect here.
- llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress();
- EmitAggregateCopy(This, RHS, CE->getType());
- return RValue::get(This);
- }
-
- // C++ [class.virtual]p12:
- // Explicit qualification with the scope operator (5.1) suppresses the
- // virtual call mechanism.
- //
- // We also don't emit a virtual call if the base expression has a record type
- // because then we know what the type is.
- llvm::Value *Callee;
- if (const CXXDestructorDecl *Destructor
- = dyn_cast<CXXDestructorDecl>(MD)) {
- if (Destructor->isTrivial())
- return RValue::get(0);
- if (MD->isVirtual() && !ME->hasQualifier() &&
- !canDevirtualizeMemberFunctionCalls(ME->getBase())) {
- Callee = BuildVirtualCall(Destructor, Dtor_Complete, This, Ty);
- } else {
- Callee = CGM.GetAddrOfFunction(GlobalDecl(Destructor, Dtor_Complete), Ty);
- }
- } else if (MD->isVirtual() && !ME->hasQualifier() &&
- !canDevirtualizeMemberFunctionCalls(ME->getBase())) {
- Callee = BuildVirtualCall(MD, This, Ty);
- } else {
- Callee = CGM.GetAddrOfFunction(MD, Ty);
- }
-
- return EmitCXXMemberCall(MD, Callee, ReturnValue, This,
- CE->arg_begin(), CE->arg_end());
-}
-
-RValue
-CodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
- ReturnValueSlot ReturnValue) {
- const BinaryOperator *BO =
- cast<BinaryOperator>(E->getCallee()->IgnoreParens());
- const Expr *BaseExpr = BO->getLHS();
- const Expr *MemFnExpr = BO->getRHS();
-
- const MemberPointerType *MPT =
- MemFnExpr->getType()->getAs<MemberPointerType>();
- const FunctionProtoType *FPT =
- MPT->getPointeeType()->getAs<FunctionProtoType>();
- const CXXRecordDecl *RD =
- cast<CXXRecordDecl>(MPT->getClass()->getAs<RecordType>()->getDecl());
-
- const llvm::FunctionType *FTy =
- CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(RD, FPT),
- FPT->isVariadic());
-
- const llvm::Type *Int8PtrTy =
- llvm::Type::getInt8Ty(VMContext)->getPointerTo();
-
- // Get the member function pointer.
- llvm::Value *MemFnPtr =
- CreateTempAlloca(ConvertType(MemFnExpr->getType()), "mem.fn");
- EmitAggExpr(MemFnExpr, MemFnPtr, /*VolatileDest=*/false);
-
- // Emit the 'this' pointer.
- llvm::Value *This;
-
- if (BO->getOpcode() == BinaryOperator::PtrMemI)
- This = EmitScalarExpr(BaseExpr);
- else
- This = EmitLValue(BaseExpr).getAddress();
-
- // Adjust it.
- llvm::Value *Adj = Builder.CreateStructGEP(MemFnPtr, 1);
- Adj = Builder.CreateLoad(Adj, "mem.fn.adj");
-
- llvm::Value *Ptr = Builder.CreateBitCast(This, Int8PtrTy, "ptr");
- Ptr = Builder.CreateGEP(Ptr, Adj, "adj");
-
- This = Builder.CreateBitCast(Ptr, This->getType(), "this");
-
- llvm::Value *FnPtr = Builder.CreateStructGEP(MemFnPtr, 0, "mem.fn.ptr");
-
- const llvm::Type *PtrDiffTy = ConvertType(getContext().getPointerDiffType());
-
- llvm::Value *FnAsInt = Builder.CreateLoad(FnPtr, "fn");
-
- // If the LSB in the function pointer is 1, the function pointer points to
- // a virtual function.
- llvm::Value *IsVirtual
- = Builder.CreateAnd(FnAsInt, llvm::ConstantInt::get(PtrDiffTy, 1),
- "and");
-
- IsVirtual = Builder.CreateTrunc(IsVirtual,
- llvm::Type::getInt1Ty(VMContext));
-
- llvm::BasicBlock *FnVirtual = createBasicBlock("fn.virtual");
- llvm::BasicBlock *FnNonVirtual = createBasicBlock("fn.nonvirtual");
- llvm::BasicBlock *FnEnd = createBasicBlock("fn.end");
-
- Builder.CreateCondBr(IsVirtual, FnVirtual, FnNonVirtual);
- EmitBlock(FnVirtual);
-
- const llvm::Type *VTableTy =
- FTy->getPointerTo()->getPointerTo()->getPointerTo();
-
- llvm::Value *VTable = Builder.CreateBitCast(This, VTableTy);
- VTable = Builder.CreateLoad(VTable);
-
- VTable = Builder.CreateGEP(VTable, FnAsInt, "fn");
-
- // Since the function pointer is 1 plus the virtual table offset, we
- // subtract 1 by using a GEP.
- VTable = Builder.CreateConstGEP1_64(VTable, (uint64_t)-1);
-
- llvm::Value *VirtualFn = Builder.CreateLoad(VTable, "virtualfn");
-
- EmitBranch(FnEnd);
- EmitBlock(FnNonVirtual);
-
- // If the function is not virtual, just load the pointer.
- llvm::Value *NonVirtualFn = Builder.CreateLoad(FnPtr, "fn");
- NonVirtualFn = Builder.CreateIntToPtr(NonVirtualFn, FTy->getPointerTo());
-
- EmitBlock(FnEnd);
-
- llvm::PHINode *Callee = Builder.CreatePHI(FTy->getPointerTo());
- Callee->reserveOperandSpace(2);
- Callee->addIncoming(VirtualFn, FnVirtual);
- Callee->addIncoming(NonVirtualFn, FnNonVirtual);
-
- CallArgList Args;
-
- QualType ThisType =
- getContext().getPointerType(getContext().getTagDeclType(RD));
-
- // Push the this ptr.
- Args.push_back(std::make_pair(RValue::get(This), ThisType));
-
- // And the rest of the call args
- EmitCallArgs(Args, FPT, E->arg_begin(), E->arg_end());
- QualType ResultType = BO->getType()->getAs<FunctionType>()->getResultType();
- return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args), Callee,
- ReturnValue, Args);
-}
-
-RValue
-CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
- const CXXMethodDecl *MD,
- ReturnValueSlot ReturnValue) {
- assert(MD->isInstance() &&
- "Trying to emit a member call expr on a static method!");
-
- if (MD->isCopyAssignment()) {
- const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(MD->getDeclContext());
- if (ClassDecl->hasTrivialCopyAssignment()) {
- assert(!ClassDecl->hasUserDeclaredCopyAssignment() &&
- "EmitCXXOperatorMemberCallExpr - user declared copy assignment");
- llvm::Value *This = EmitLValue(E->getArg(0)).getAddress();
- llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress();
- QualType Ty = E->getType();
- EmitAggregateCopy(This, Src, Ty);
- return RValue::get(This);
- }
- }
-
- const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
- const llvm::Type *Ty =
- CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(MD),
- FPT->isVariadic());
-
- llvm::Value *This = EmitLValue(E->getArg(0)).getAddress();
-
- llvm::Value *Callee;
- if (MD->isVirtual() && !canDevirtualizeMemberFunctionCalls(E->getArg(0)))
- Callee = BuildVirtualCall(MD, This, Ty);
- else
- Callee = CGM.GetAddrOfFunction(MD, Ty);
-
- return EmitCXXMemberCall(MD, Callee, ReturnValue, This,
- E->arg_begin() + 1, E->arg_end());
-}
llvm::Value *CodeGenFunction::LoadCXXThis() {
assert(isa<CXXMethodDecl>(CurFuncDecl) &&
@@ -302,320 +40,6 @@ llvm::Value *CodeGenFunction::LoadCXXThis() {
return Builder.CreateLoad(LocalDeclMap[CXXThisDecl], "this");
}
-/// EmitCXXAggrConstructorCall - This routine essentially creates a (nested)
-/// for-loop to call the default constructor on individual members of the
-/// array.
-/// 'D' is the default constructor for elements of the array, 'ArrayTy' is the
-/// array type and 'ArrayPtr' points to the beginning fo the array.
-/// It is assumed that all relevant checks have been made by the caller.
-void
-CodeGenFunction::EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
- const ConstantArrayType *ArrayTy,
- llvm::Value *ArrayPtr,
- CallExpr::const_arg_iterator ArgBeg,
- CallExpr::const_arg_iterator ArgEnd) {
-
- const llvm::Type *SizeTy = ConvertType(getContext().getSizeType());
- llvm::Value * NumElements =
- llvm::ConstantInt::get(SizeTy,
- getContext().getConstantArrayElementCount(ArrayTy));
-
- EmitCXXAggrConstructorCall(D, NumElements, ArrayPtr, ArgBeg, ArgEnd);
-}
-
-void
-CodeGenFunction::EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
- llvm::Value *NumElements,
- llvm::Value *ArrayPtr,
- CallExpr::const_arg_iterator ArgBeg,
- CallExpr::const_arg_iterator ArgEnd) {
- const llvm::Type *SizeTy = ConvertType(getContext().getSizeType());
-
- // Create a temporary for the loop index and initialize it with 0.
- llvm::Value *IndexPtr = CreateTempAlloca(SizeTy, "loop.index");
- llvm::Value *Zero = llvm::Constant::getNullValue(SizeTy);
- Builder.CreateStore(Zero, IndexPtr);
-
- // Start the loop with a block that tests the condition.
- llvm::BasicBlock *CondBlock = createBasicBlock("for.cond");
- llvm::BasicBlock *AfterFor = createBasicBlock("for.end");
-
- EmitBlock(CondBlock);
-
- llvm::BasicBlock *ForBody = createBasicBlock("for.body");
-
- // Generate: if (loop-index < number-of-elements fall to the loop body,
- // otherwise, go to the block after the for-loop.
- llvm::Value *Counter = Builder.CreateLoad(IndexPtr);
- llvm::Value *IsLess = Builder.CreateICmpULT(Counter, NumElements, "isless");
- // If the condition is true, execute the body.
- Builder.CreateCondBr(IsLess, ForBody, AfterFor);
-
- EmitBlock(ForBody);
-
- llvm::BasicBlock *ContinueBlock = createBasicBlock("for.inc");
- // Inside the loop body, emit the constructor call on the array element.
- Counter = Builder.CreateLoad(IndexPtr);
- llvm::Value *Address = Builder.CreateInBoundsGEP(ArrayPtr, Counter,
- "arrayidx");
-
- // 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.
-
- // Keep track of the current number of live temporaries.
- unsigned OldNumLiveTemporaries = LiveTemporaries.size();
-
- EmitCXXConstructorCall(D, Ctor_Complete, Address, ArgBeg, ArgEnd);
-
- // Pop temporaries.
- while (LiveTemporaries.size() > OldNumLiveTemporaries)
- PopCXXTemporary();
-
- EmitBlock(ContinueBlock);
-
- // Emit the increment of the loop counter.
- llvm::Value *NextVal = llvm::ConstantInt::get(SizeTy, 1);
- Counter = Builder.CreateLoad(IndexPtr);
- NextVal = Builder.CreateAdd(Counter, NextVal, "inc");
- Builder.CreateStore(NextVal, IndexPtr);
-
- // Finally, branch back up to the condition for the next iteration.
- EmitBranch(CondBlock);
-
- // Emit the fall-through block.
- EmitBlock(AfterFor, true);
-}
-
-/// EmitCXXAggrDestructorCall - calls the default destructor on array
-/// elements in reverse order of construction.
-void
-CodeGenFunction::EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
- const ArrayType *Array,
- llvm::Value *This) {
- const ConstantArrayType *CA = dyn_cast<ConstantArrayType>(Array);
- assert(CA && "Do we support VLA for destruction ?");
- uint64_t ElementCount = getContext().getConstantArrayElementCount(CA);
-
- const llvm::Type *SizeLTy = ConvertType(getContext().getSizeType());
- llvm::Value* ElementCountPtr = llvm::ConstantInt::get(SizeLTy, ElementCount);
- EmitCXXAggrDestructorCall(D, ElementCountPtr, This);
-}
-
-/// EmitCXXAggrDestructorCall - calls the default destructor on array
-/// elements in reverse order of construction.
-void
-CodeGenFunction::EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
- llvm::Value *UpperCount,
- llvm::Value *This) {
- const llvm::Type *SizeLTy = ConvertType(getContext().getSizeType());
- llvm::Value *One = llvm::ConstantInt::get(SizeLTy, 1);
-
- // Create a temporary for the loop index and initialize it with count of
- // array elements.
- llvm::Value *IndexPtr = CreateTempAlloca(SizeLTy, "loop.index");
-
- // Store the number of elements in the index pointer.
- Builder.CreateStore(UpperCount, IndexPtr);
-
- // Start the loop with a block that tests the condition.
- llvm::BasicBlock *CondBlock = createBasicBlock("for.cond");
- llvm::BasicBlock *AfterFor = createBasicBlock("for.end");
-
- EmitBlock(CondBlock);
-
- llvm::BasicBlock *ForBody = createBasicBlock("for.body");
-
- // Generate: if (loop-index != 0 fall to the loop body,
- // otherwise, go to the block after the for-loop.
- llvm::Value* zeroConstant =
- llvm::Constant::getNullValue(SizeLTy);
- llvm::Value *Counter = Builder.CreateLoad(IndexPtr);
- llvm::Value *IsNE = Builder.CreateICmpNE(Counter, zeroConstant,
- "isne");
- // If the condition is true, execute the body.
- Builder.CreateCondBr(IsNE, ForBody, AfterFor);
-
- EmitBlock(ForBody);
-
- llvm::BasicBlock *ContinueBlock = createBasicBlock("for.inc");
- // Inside the loop body, emit the constructor call on the array element.
- Counter = Builder.CreateLoad(IndexPtr);
- Counter = Builder.CreateSub(Counter, One);
- llvm::Value *Address = Builder.CreateInBoundsGEP(This, Counter, "arrayidx");
- EmitCXXDestructorCall(D, Dtor_Complete, Address);
-
- EmitBlock(ContinueBlock);
-
- // Emit the decrement of the loop counter.
- Counter = Builder.CreateLoad(IndexPtr);
- Counter = Builder.CreateSub(Counter, One, "dec");
- Builder.CreateStore(Counter, IndexPtr);
-
- // Finally, branch back up to the condition for the next iteration.
- EmitBranch(CondBlock);
-
- // Emit the fall-through block.
- EmitBlock(AfterFor, true);
-}
-
-/// GenerateCXXAggrDestructorHelper - Generates a helper function which when
-/// invoked, calls the default destructor on array elements in reverse order of
-/// construction.
-llvm::Constant *
-CodeGenFunction::GenerateCXXAggrDestructorHelper(const CXXDestructorDecl *D,
- const ArrayType *Array,
- llvm::Value *This) {
- FunctionArgList Args;
- ImplicitParamDecl *Dst =
- ImplicitParamDecl::Create(getContext(), 0,
- SourceLocation(), 0,
- getContext().getPointerType(getContext().VoidTy));
- Args.push_back(std::make_pair(Dst, Dst->getType()));
-
- llvm::SmallString<16> Name;
- llvm::raw_svector_ostream(Name) << "__tcf_" << (++UniqueAggrDestructorCount);
- QualType R = getContext().VoidTy;
- const CGFunctionInfo &FI = CGM.getTypes().getFunctionInfo(R, Args);
- const llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI, false);
- llvm::Function *Fn =
- llvm::Function::Create(FTy, llvm::GlobalValue::InternalLinkage,
- Name.str(),
- &CGM.getModule());
- IdentifierInfo *II = &CGM.getContext().Idents.get(Name.str());
- FunctionDecl *FD = FunctionDecl::Create(getContext(),
- getContext().getTranslationUnitDecl(),
- SourceLocation(), II, R, 0,
- FunctionDecl::Static,
- false, true);
- StartFunction(FD, R, Fn, Args, SourceLocation());
- QualType BaseElementTy = getContext().getBaseElementType(Array);
- const llvm::Type *BasePtr = ConvertType(BaseElementTy);
- BasePtr = llvm::PointerType::getUnqual(BasePtr);
- llvm::Value *BaseAddrPtr = Builder.CreateBitCast(This, BasePtr);
- EmitCXXAggrDestructorCall(D, Array, BaseAddrPtr);
- FinishFunction();
- llvm::Type *Ptr8Ty = llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext),
- 0);
- llvm::Constant *m = llvm::ConstantExpr::getBitCast(Fn, Ptr8Ty);
- return m;
-}
-
-void
-CodeGenFunction::EmitCXXConstructorCall(const CXXConstructorDecl *D,
- CXXCtorType Type,
- llvm::Value *This,
- CallExpr::const_arg_iterator ArgBeg,
- CallExpr::const_arg_iterator ArgEnd) {
- if (D->isCopyConstructor()) {
- const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(D->getDeclContext());
- if (ClassDecl->hasTrivialCopyConstructor()) {
- assert(!ClassDecl->hasUserDeclaredCopyConstructor() &&
- "EmitCXXConstructorCall - user declared copy constructor");
- const Expr *E = (*ArgBeg);
- QualType Ty = E->getType();
- llvm::Value *Src = EmitLValue(E).getAddress();
- EmitAggregateCopy(This, Src, Ty);
- return;
- }
- } else if (D->isTrivial()) {
- // FIXME: Track down why we're trying to generate calls to the trivial
- // default constructor!
- return;
- }
-
- llvm::Value *Callee = CGM.GetAddrOfCXXConstructor(D, Type);
-
- EmitCXXMemberCall(D, Callee, ReturnValueSlot(), This, ArgBeg, ArgEnd);
-}
-
-void CodeGenFunction::EmitCXXDestructorCall(const CXXDestructorDecl *DD,
- CXXDtorType Type,
- llvm::Value *This) {
- llvm::Value *Callee = CGM.GetAddrOfCXXDestructor(DD, Type);
-
- CallArgList Args;
-
- // Push the this ptr.
- Args.push_back(std::make_pair(RValue::get(This),
- DD->getThisType(getContext())));
-
- // Add a VTT parameter if necessary.
- // FIXME: This should not be a dummy null parameter!
- if (Type == Dtor_Base && DD->getParent()->getNumVBases() != 0) {
- QualType T = getContext().getPointerType(getContext().VoidPtrTy);
-
- Args.push_back(std::make_pair(RValue::get(CGM.EmitNullConstant(T)), T));
- }
-
- // FIXME: We should try to share this code with EmitCXXMemberCall.
-
- QualType ResultType = DD->getType()->getAs<FunctionType>()->getResultType();
- EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args), Callee,
- ReturnValueSlot(), Args, DD);
-}
-
-void
-CodeGenFunction::EmitCXXConstructExpr(llvm::Value *Dest,
- const CXXConstructExpr *E) {
- assert(Dest && "Must have a destination!");
- const CXXConstructorDecl *CD = E->getConstructor();
- const ConstantArrayType *Array =
- getContext().getAsConstantArrayType(E->getType());
- // For a copy constructor, even if it is trivial, must fall thru so
- // its argument is code-gen'ed.
- if (!CD->isCopyConstructor()) {
- QualType InitType = E->getType();
- if (Array)
- InitType = getContext().getBaseElementType(Array);
- const CXXRecordDecl *RD =
- cast<CXXRecordDecl>(InitType->getAs<RecordType>()->getDecl());
- if (RD->hasTrivialConstructor())
- return;
- }
- // Code gen optimization to eliminate copy constructor and return
- // its first argument instead.
- if (getContext().getLangOptions().ElideConstructors && E->isElidable()) {
- const Expr *Arg = E->getArg(0);
-
- if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Arg)) {
- assert((ICE->getCastKind() == CastExpr::CK_NoOp ||
- ICE->getCastKind() == CastExpr::CK_ConstructorConversion ||
- ICE->getCastKind() == CastExpr::CK_UserDefinedConversion) &&
- "Unknown implicit cast kind in constructor elision");
- Arg = ICE->getSubExpr();
- }
-
- if (const CXXFunctionalCastExpr *FCE = dyn_cast<CXXFunctionalCastExpr>(Arg))
- Arg = FCE->getSubExpr();
-
- if (const CXXBindTemporaryExpr *BindExpr =
- dyn_cast<CXXBindTemporaryExpr>(Arg))
- Arg = BindExpr->getSubExpr();
-
- EmitAggExpr(Arg, Dest, false);
- return;
- }
- if (Array) {
- QualType BaseElementTy = getContext().getBaseElementType(Array);
- const llvm::Type *BasePtr = ConvertType(BaseElementTy);
- BasePtr = llvm::PointerType::getUnqual(BasePtr);
- llvm::Value *BaseAddrPtr =
- Builder.CreateBitCast(Dest, BasePtr);
-
- EmitCXXAggrConstructorCall(CD, Array, BaseAddrPtr,
- E->arg_begin(), E->arg_end());
- }
- else
- // Call the constructor.
- EmitCXXConstructorCall(CD, Ctor_Complete, Dest,
- E->arg_begin(), E->arg_end());
-}
-
void CodeGenModule::EmitCXXConstructors(const CXXConstructorDecl *D) {
EmitGlobal(GlobalDecl(D, Ctor_Complete));
EmitGlobal(GlobalDecl(D, Ctor_Base));
@@ -1001,33 +425,6 @@ CodeGenModule::BuildCovariantThunk(const GlobalDecl &GD, bool Extern,
return m;
}
-llvm::Value *
-CodeGenFunction::GetVirtualCXXBaseClassOffset(llvm::Value *This,
- const CXXRecordDecl *ClassDecl,
- const CXXRecordDecl *BaseClassDecl) {
- const llvm::Type *Int8PtrTy =
- llvm::Type::getInt8Ty(VMContext)->getPointerTo();
-
- llvm::Value *VTablePtr = Builder.CreateBitCast(This,
- Int8PtrTy->getPointerTo());
- VTablePtr = Builder.CreateLoad(VTablePtr, "vtable");
-
- int64_t VBaseOffsetIndex =
- CGM.getVtableInfo().getVirtualBaseOffsetIndex(ClassDecl, BaseClassDecl);
-
- llvm::Value *VBaseOffsetPtr =
- Builder.CreateConstGEP1_64(VTablePtr, VBaseOffsetIndex, "vbase.offset.ptr");
- const llvm::Type *PtrDiffTy =
- ConvertType(getContext().getPointerDiffType());
-
- VBaseOffsetPtr = Builder.CreateBitCast(VBaseOffsetPtr,
- PtrDiffTy->getPointerTo());
-
- llvm::Value *VBaseOffset = Builder.CreateLoad(VBaseOffsetPtr, "vbase.offset");
-
- return VBaseOffset;
-}
-
static llvm::Value *BuildVirtualCall(CodeGenFunction &CGF, uint64_t VtableIndex,
llvm::Value *This, const llvm::Type *Ty) {
Ty = Ty->getPointerTo()->getPointerTo()->getPointerTo();
@@ -1058,71 +455,3 @@ CodeGenFunction::BuildVirtualCall(const CXXDestructorDecl *DD, CXXDtorType Type,
return ::BuildVirtualCall(*this, VtableIndex, This, Ty);
}
-
-void CodeGenFunction::InitializeVtablePtrs(const CXXRecordDecl *ClassDecl) {
- if (!ClassDecl->isDynamicClass())
- return;
-
- llvm::Constant *Vtable = CGM.getVtableInfo().getVtable(ClassDecl);
- CodeGenModule::AddrSubMap_t& AddressPoints =
- *(*CGM.AddressPoints[ClassDecl])[ClassDecl];
- llvm::Value *ThisPtr = LoadCXXThis();
- const ASTRecordLayout &Layout = getContext().getASTRecordLayout(ClassDecl);
-
- // Store address points for virtual bases
- 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());
- uint64_t Offset = Layout.getVBaseClassOffset(BaseClassDecl);
- InitializeVtablePtrsRecursive(BaseClassDecl, Vtable, AddressPoints,
- ThisPtr, Offset);
- }
-
- // Store address points for non-virtual bases and current class
- InitializeVtablePtrsRecursive(ClassDecl, Vtable, AddressPoints, ThisPtr, 0);
-}
-
-void CodeGenFunction::InitializeVtablePtrsRecursive(
- const CXXRecordDecl *ClassDecl,
- llvm::Constant *Vtable,
- CodeGenModule::AddrSubMap_t& AddressPoints,
- llvm::Value *ThisPtr,
- uint64_t Offset) {
- if (!ClassDecl->isDynamicClass())
- return;
-
- // Store address points for non-virtual bases
- const ASTRecordLayout &Layout = getContext().getASTRecordLayout(ClassDecl);
- for (CXXRecordDecl::base_class_const_iterator I =
- ClassDecl->bases_begin(), E = ClassDecl->bases_end(); I != E; ++I) {
- const CXXBaseSpecifier &Base = *I;
- if (Base.isVirtual())
- continue;
- CXXRecordDecl *BaseClassDecl
- = cast<CXXRecordDecl>(Base.getType()->getAs<RecordType>()->getDecl());
- uint64_t NewOffset = Offset + Layout.getBaseClassOffset(BaseClassDecl);
- InitializeVtablePtrsRecursive(BaseClassDecl, Vtable, AddressPoints,
- ThisPtr, NewOffset);
- }
-
- // Compute the address point
- assert(AddressPoints.count(std::make_pair(ClassDecl, Offset)) &&
- "Missing address point for class");
- uint64_t AddressPoint = AddressPoints[std::make_pair(ClassDecl, Offset)];
- llvm::Value *VtableAddressPoint =
- Builder.CreateConstInBoundsGEP2_64(Vtable, 0, AddressPoint);
-
- // Compute the address to store the address point
- const llvm::Type *Int8PtrTy = llvm::Type::getInt8PtrTy(CGM.getLLVMContext());
- llvm::Value *VtableField = Builder.CreateBitCast(ThisPtr, Int8PtrTy);
- VtableField = Builder.CreateConstInBoundsGEP1_64(VtableField, Offset/8);
- const llvm::Type *AddressPointPtrTy =
- VtableAddressPoint->getType()->getPointerTo();
- VtableField = Builder.CreateBitCast(VtableField, AddressPointPtrTy);
-
- // Store address point
- Builder.CreateStore(VtableAddressPoint, VtableField);
-}
-
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