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Add virtual adjustments for this for thunks. 

llvm-svn: 85852
This commit is contained in:
Mike Stump 2009-11-03 02:12:59 +00:00
parent 7861a80346
commit f358972fdc
1 changed files with 30 additions and 2 deletions
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32
clang/lib/CodeGen/CGCXX.cpp
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@ -737,9 +737,38 @@ llvm::Constant *CodeGenFunction::GenerateCovariantThunk(llvm::Function *Fn,
StartFunction(FD, ResultType, Fn, Args, SourceLocation());
// generate body
llvm::Value *Callee = CGM.GetAddrOfFunction(MD);
const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
const llvm::Type *Ty =
CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(MD),
FPT->isVariadic());
llvm::Value *Callee = CGM.GetAddrOfFunction(MD, Ty);
CallArgList CallArgs;
QualType ArgType = MD->getThisType(getContext());
llvm::Value *Arg = Builder.CreateLoad(LocalDeclMap[ThisDecl], "this");
if (v_t) {
const llvm::Type *OrigTy = Arg->getType();
// FIXME: Add this adjustments
const llvm::Type *PtrDiffTy =
ConvertType(getContext().getPointerDiffType());
llvm::Type *Ptr8Ty, *PtrPtr8Ty, *PtrPtrDiffTy;
Ptr8Ty = llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext), 0);
PtrPtr8Ty = llvm::PointerType::get(Ptr8Ty, 0);
PtrPtrDiffTy = llvm::PointerType::get(PtrDiffTy, 0);
llvm::Value *ThisVal = Builder.CreateBitCast(Arg, Ptr8Ty);
Arg = Builder.CreateBitCast(Arg, PtrPtrDiffTy->getPointerTo());
Arg = Builder.CreateLoad(Arg, "vtable");
llvm::Value *VTablePtr = Arg;
assert(v_t % (LLVMPointerWidth/8) == 0 && "vtable entry unaligned");
v_t /= LLVMPointerWidth/8;
Arg = Builder.CreateConstInBoundsGEP1_64(VTablePtr, v_t);
Arg = Builder.CreateLoad(Arg);
Arg = Builder.CreateGEP(ThisVal, Arg);
Arg = Builder.CreateBitCast(Arg, OrigTy);
}
// FIXME: Add this non-virtual adjustment
CallArgs.push_back(std::make_pair(RValue::get(Arg), ArgType));
for (FunctionDecl::param_const_iterator i = MD->param_begin(),
e = MD->param_end();
i != e; ++i) {
@ -748,7 +777,6 @@ llvm::Constant *CodeGenFunction::GenerateCovariantThunk(llvm::Function *Fn,
// llvm::Value *Arg = CGF.GetAddrOfLocalVar(Dst);
Expr *Arg = new (getContext()) DeclRefExpr(D, ArgType, SourceLocation());
// FIXME: Add this adjustments
CallArgs.push_back(std::make_pair(EmitCallArg(Arg, ArgType), ArgType));
}