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[X86] Use llvm::isOneConstant (NFC)

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This commit is contained in:
Kazu Hirata 2023-03-22 00:25:13 -07:00
parent 823ddba1b3
commit 1fe6a8a584
1 changed files with 3 additions and 5 deletions
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8
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -56700,11 +56700,9 @@ static SDValue combineScalarToVector(SDNode *N, SelectionDAG &DAG) {
// This occurs frequently in our masked scalar intrinsic code and our
// floating point select lowering with AVX512.
// TODO: SimplifyDemandedBits instead?
if (VT == MVT::v1i1 && Src.getOpcode() == ISD::AND && Src.hasOneUse())
if (auto *C = dyn_cast<ConstantSDNode>(Src.getOperand(1)))
if (C->getAPIntValue().isOne())
return DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v1i1,
Src.getOperand(0));
if (VT == MVT::v1i1 && Src.getOpcode() == ISD::AND && Src.hasOneUse() &&
isOneConstant(Src.getOperand(1)))
return DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v1i1, Src.getOperand(0));
// Combine scalar_to_vector of an extract_vector_elt into an extract_subvec.
if (VT == MVT::v1i1 && Src.getOpcode() == ISD::EXTRACT_VECTOR_ELT &&