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Implement __builtin_va_copy 

llvm-svn: 46911
This commit is contained in:
Anders Carlsson 2008-02-09 20:26:43 +00:00
parent 2e64d1a50f
commit c0b0e59643
1 changed files with 19 additions and 0 deletions
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19
clang/CodeGen/CGBuiltin.cpp
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@ -125,6 +125,25 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) {
Intrinsic::vastart : Intrinsic::vaend;
return RValue::get(Builder.CreateCall(CGM.getIntrinsic(inst), ArgValue));
}
case Builtin::BI__builtin_va_copy: {
// FIXME: This does not yet handle architectures where va_list is a struct.
Value *DstPtr = EmitScalarExpr(E->getArg(0));
Value *SrcValue = EmitScalarExpr(E->getArg(1));
Value *SrcPtr = CreateTempAlloca(SrcValue->getType(), "dst_ptr");
// FIXME: Volatile
Builder.CreateStore(SrcValue, SrcPtr, false);
const llvm::Type *Type =
llvm::PointerType::getUnqual(llvm::Type::Int8Ty);
DstPtr = Builder.CreateBitCast(DstPtr, Type);
SrcPtr = Builder.CreateBitCast(SrcPtr, Type);
Value *Args[] = { DstPtr, SrcPtr };
return RValue::get(Builder.CreateCall(CGM.getIntrinsic(Intrinsic::vacopy),
&Args[0], &Args[2]));
}
case Builtin::BI__builtin_classify_type: {
APSInt Result(32);
if (!E->isBuiltinClassifyType(Result))