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Fix the handling of va_copy on x86-64. As of llvm-gcc r49920 

llvm-gcc is now lowering va_copy on x86-64, so this completes
the fix for PR2230.

llvm-svn: 49922
This commit is contained in:
Dan Gohman 2008-04-18 20:55:41 +00:00
parent 00bd8d904a
commit ad4071a9e1
1 changed files with 4 additions and 14 deletions
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18
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -4954,26 +4954,16 @@ SDOperand X86TargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG) {
SDOperand X86TargetLowering::LowerVACOPY(SDOperand Op, SelectionDAG &DAG) {
// X86-64 va_list is a struct { i32, i32, i8*, i8* }.
assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
SDOperand Chain = Op.getOperand(0);
SDOperand DstPtr = Op.getOperand(1);
SDOperand SrcPtr = Op.getOperand(2);
const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
SrcPtr = DAG.getLoad(getPointerTy(), Chain, SrcPtr, SrcSV, 0);
Chain = SrcPtr.getValue(1);
for (unsigned i = 0; i < 3; ++i) {
SDOperand Val = DAG.getLoad(MVT::i64, Chain, SrcPtr, SrcSV, 0);
Chain = Val.getValue(1);
Chain = DAG.getStore(Chain, Val, DstPtr, DstSV, 0);
if (i == 2)
break;
SrcPtr = DAG.getNode(ISD::ADD, getPointerTy(), SrcPtr,
DAG.getIntPtrConstant(8));
DstPtr = DAG.getNode(ISD::ADD, getPointerTy(), DstPtr,
DAG.getIntPtrConstant(8));
}
return Chain;
return DAG.getMemcpy(Chain, DstPtr, SrcPtr,
DAG.getIntPtrConstant(24), 8, false,
DstSV, 0, SrcSV, 0);
}
SDOperand