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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37818 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-06-29 21:44:35 +00:00
parent 96734d741f
commit c45453fa1d
1 changed files with 9 additions and 7 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -1798,6 +1798,7 @@ 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();
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());
@ -1808,6 +1809,7 @@ void SelectionDAGLowering::visitSub(User &I) {
}
}
}
}
if (Ty->isFloatingPoint()) {
if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0)))
if (CFP->isExactlyValue(-0.0)) {