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Only do FNEG xform when the vector type is a floating point type. 

llvm-svn: 37818
This commit is contained in:
Evan Cheng 2007-06-29 21:44:35 +00:00
parent cae5d345fb
commit fa68d069ad
1 changed files with 9 additions and 7 deletions
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16
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -1798,13 +1798,15 @@ void SelectionDAGLowering::visitSub(User &I) {
if (ConstantVector *CV = dyn_cast<ConstantVector>(I.getOperand(0))) {
const VectorType *DestTy = cast<VectorType>(I.getType());
const Type *ElTy = DestTy->getElementType();
unsigned VL = DestTy->getNumElements();
std::vector<Constant*> NZ(VL, ConstantFP::get(ElTy, -0.0));
Constant *CNZ = ConstantVector::get(&NZ[0], NZ.size());
if (CV == CNZ) {
SDOperand Op2 = getValue(I.getOperand(1));
setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2));
return;
if (ElTy->isFloatingPoint()) {
unsigned VL = DestTy->getNumElements();
std::vector<Constant*> NZ(VL, ConstantFP::get(ElTy, -0.0));
Constant *CNZ = ConstantVector::get(&NZ[0], NZ.size());
if (CV == CNZ) {
SDOperand Op2 = getValue(I.getOperand(1));
setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2));
return;
}
}
}
}