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Reapply r95393, without the change to CGExpr. I was wrong in assuming that the 

element type always matched the converted LLVM type for ExprType.

llvm-svn: 95596
This commit is contained in:
Daniel Dunbar 2010-02-08 22:53:07 +00:00
parent 99777dd78f
commit 3d33fab7fc
3 changed files with 13 additions and 18 deletions
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20
clang/lib/CodeGen/CGDecl.cpp
View File

@ -703,25 +703,19 @@ void CodeGenFunction::EmitParmDecl(const VarDecl &D, llvm::Value *Arg) {
CanQualType CTy = getContext().getCanonicalType(Ty);
llvm::Value *DeclPtr;
if (!Ty->isConstantSizeType()) {
// Variable sized values always are passed by-reference.
// If this is an aggregate or variable sized value, reuse the input pointer.
if (!Ty->isConstantSizeType() ||
CodeGenFunction::hasAggregateLLVMType(Ty)) {
DeclPtr = Arg;
} else {
// A fixed sized single-value variable becomes an alloca in the entry block.
const llvm::Type *LTy = ConvertTypeForMem(Ty);
if (LTy->isSingleValueType()) {
// TODO: Alignment
DeclPtr = CreateTempAlloca(LTy);
DeclPtr->setName(D.getNameAsString() + llvm::StringRef(".addr"));
// Otherwise, create a temporary to hold the value.
DeclPtr = CreateTempAlloca(ConvertTypeForMem(Ty));
DeclPtr->setName(D.getName() + ".addr");
// Store the initial value into the alloca.
EmitStoreOfScalar(Arg, DeclPtr, CTy.isVolatileQualified(), Ty);
} else {
// Otherwise, if this is an aggregate, just use the input pointer.
DeclPtr = Arg;
}
Arg->setName(D.getNameAsString());
}
Arg->setName(D.getName());
llvm::Value *&DMEntry = LocalDeclMap[&D];
assert(DMEntry == 0 && "Decl already exists in localdeclmap!");

2
clang/lib/CodeGen/CGExpr.cpp
View File

@ -553,6 +553,8 @@ RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) {
cast<llvm::PointerType>(Ptr->getType())->getElementType();
// Simple scalar l-value.
//
// FIXME: We shouldn't have to use isSingleValueType here.
if (EltTy->isSingleValueType())
return RValue::get(EmitLoadOfScalar(Ptr, LV.isVolatileQualified(),
ExprType));

5
clang/lib/CodeGen/CGStmt.cpp
View File

@ -861,14 +861,13 @@ llvm::Value* CodeGenFunction::EmitAsmInput(const AsmStmt &S,
std::string &ConstraintStr) {
llvm::Value *Arg;
if (Info.allowsRegister() || !Info.allowsMemory()) {
const llvm::Type *Ty = ConvertType(InputExpr->getType());
if (Ty->isSingleValueType()) {
if (!CodeGenFunction::hasAggregateLLVMType(InputExpr->getType())) {
Arg = EmitScalarExpr(InputExpr);
} else {
InputExpr = InputExpr->IgnoreParenNoopCasts(getContext());
LValue Dest = EmitLValue(InputExpr);
const llvm::Type *Ty = ConvertType(InputExpr->getType());
uint64_t Size = CGM.getTargetData().getTypeSizeInBits(Ty);
if (Size <= 64 && llvm::isPowerOf2_64(Size)) {
Ty = llvm::IntegerType::get(VMContext, Size);