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[X86] Remove code from combineSext that looks for MVT::i1 after operation legalization which can never happen. 

Type legalization guarantees this to be impossible since MVT::i1 isn't a legal type.

llvm-svn: 321132
This commit is contained in:
Craig Topper 2017-12-20 01:00:01 +00:00
parent b5f53449e4
commit aee3acb9a8
1 changed files with 1 additions and 7 deletions
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8
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -35848,14 +35848,8 @@ static SDValue combineSext(SDNode *N, SelectionDAG &DAG,
if (SDValue NewCMov = combineToExtendCMOV(N, DAG))
return NewCMov;
if (!DCI.isBeforeLegalizeOps()) {
if (InVT == MVT::i1) {
SDValue Zero = DAG.getConstant(0, DL, VT);
SDValue AllOnes = DAG.getAllOnesConstant(DL, VT);
return DAG.getSelect(DL, VT, N0, AllOnes, Zero);
}
if (!DCI.isBeforeLegalizeOps())
return SDValue();
}
if (InVT == MVT::i1 && N0.getOpcode() == ISD::XOR &&
isAllOnesConstant(N0.getOperand(1)) && N0.hasOneUse()) {