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[TargetLowering] Use isOneConstant to simplify some code. NFC

This commit is contained in:
Craig Topper 2021-01-22 19:15:31 -08:00
parent dd922bc2a6
commit 147c0c263d
1 changed files with 2 additions and 5 deletions
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7
llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -3780,8 +3780,7 @@ SDValue TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1,
(N0.getOpcode() == ISD::AND &&
N0.getOperand(0).getOpcode() == ISD::XOR &&
N0.getOperand(1) == N0.getOperand(0).getOperand(1))) &&
isa<ConstantSDNode>(N0.getOperand(1)) &&
cast<ConstantSDNode>(N0.getOperand(1))->isOne()) {
isOneConstant(N0.getOperand(1))) {
// If this is (X^1) == 0/1, swap the RHS and eliminate the xor. We
// can only do this if the top bits are known zero.
unsigned BitWidth = N0.getValueSizeInBits();
@ -3825,9 +3824,7 @@ SDValue TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1,
return DAG.getSetCC(dl, VT, XorLHS, XorRHS, Cond);
}
}
if (Op0.getOpcode() == ISD::AND &&
isa<ConstantSDNode>(Op0.getOperand(1)) &&
cast<ConstantSDNode>(Op0.getOperand(1))->isOne()) {
if (Op0.getOpcode() == ISD::AND && isOneConstant(Op0.getOperand(1))) {
// If this is (X&1) == / != 1, normalize it to (X&1) != / == 0.
if (Op0.getValueType().bitsGT(VT))
Op0 = DAG.getNode(ISD::AND, dl, VT,