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Implement lowering of va_arg in clang directly. (This is 32-bit X86 only for now).

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llvm-svn: 58681
This commit is contained in:
Anders Carlsson
2008-11-04 05:30:00 +00:00
parent 4961890c07
commit 13abd7e98b
4 changed files with 55 additions and 4 deletions
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8
clang/lib/CodeGen/CGExprAgg.cpp
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@@ -256,10 +256,14 @@ void AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) {
void AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) {
llvm::Value *ArgValue = CGF.EmitLValue(VE->getSubExpr()).getAddress();
llvm::Value *V = Builder.CreateVAArg(ArgValue, CGF.ConvertType(VE->getType()));
llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType());
if (!ArgPtr)
CGF.ErrorUnsupported(VE, "aggregate va_arg expression");
if (DestPtr)
// FIXME: volatility
Builder.CreateStore(V, DestPtr);
CGF.EmitAggregateCopy(DestPtr, ArgPtr, VE->getType());
}
void AggExprEmitter::EmitNonConstInit(InitListExpr *E) {