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some cleanups and get alignments correct for various coerce cases. 

llvm-svn: 109607
This commit is contained in:
Chris Lattner 2010-07-28 18:24:28 +00:00
parent 5dc055350e
commit ff941a666a
1 changed files with 16 additions and 9 deletions
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25
clang/lib/CodeGen/CGCall.cpp
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@ -311,11 +311,10 @@ void CodeGenTypes::GetExpandedTypes(QualType Ty,
"Cannot expand structure with bit-field members.");
QualType FT = FD->getType();
if (CodeGenFunction::hasAggregateLLVMType(FT)) {
if (CodeGenFunction::hasAggregateLLVMType(FT))
GetExpandedTypes(FT, ArgTys, IsRecursive);
} else {
else
ArgTys.push_back(ConvertType(FT, IsRecursive));
}
}
}
@ -759,7 +758,7 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
if (RetAttrs)
PAL.push_back(llvm::AttributeWithIndex::get(0, RetAttrs));
// FIXME: we need to honour command line settings also...
// FIXME: we need to honor command line settings also.
// FIXME: RegParm should be reduced in case of nested functions and/or global
// register variable.
signed RegParm = FI.getRegParm();
@ -945,11 +944,16 @@ void CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI,
continue;
case ABIArgInfo::Coerce: {
// FIXME: This is very wasteful; EmitParmDecl is just going to drop the
// result in a new alloca anyway, so we could just store into that
// directly if we broke the abstraction down more.
llvm::AllocaInst *Alloca = CreateMemTemp(Ty, "coerce");
Alloca->setAlignment(getContext().getDeclAlign(Arg).getQuantity());
// The alignment we need to use is the max of the requested alignment for
// the argument plus the alignment required by our access code below.
unsigned AlignmentToUse =
CGF.CGM.getTargetData().getABITypeAlignment(ArgI.getCoerceToType());
AlignmentToUse = std::max(AlignmentToUse,
(unsigned)getContext().getDeclAlign(Arg).getQuantity());
Alloca->setAlignment(AlignmentToUse);
llvm::Value *V = Alloca;
// If the coerce-to type is a first class aggregate, we flatten it and
@ -1201,7 +1205,10 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
llvm::PointerType::getUnqual(STy));
for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
llvm::Value *EltPtr = Builder.CreateConstGEP2_32(SrcPtr, 0, i);
Args.push_back(Builder.CreateLoad(EltPtr));
llvm::LoadInst *LI = Builder.CreateLoad(EltPtr);
// We don't know what we're loading from.
LI->setAlignment(1);
Args.push_back(LI);
}
} else {
// In the simple case, just pass the coerced loaded value.