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[x86] simplify code; NFC 

We bail out if the types don't match, so it's clearer to
have a single variable to show that common type.
This commit is contained in:
Sanjay Patel 2021-11-10 13:26:16 -05:00
parent 5424fb164a
commit a8abd19b10
1 changed files with 5 additions and 7 deletions
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12
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -45801,10 +45801,8 @@ static SDValue combineAndMaskToShift(SDNode *N, SelectionDAG &DAG,
const X86Subtarget &Subtarget) {
SDValue Op0 = peekThroughBitcasts(N->getOperand(0));
SDValue Op1 = peekThroughBitcasts(N->getOperand(1));
EVT VT0 = Op0.getValueType();
EVT VT1 = Op1.getValueType();
if (VT0 != VT1 || !VT0.isSimple() || !VT0.isInteger())
EVT VT = Op0.getValueType();
if (VT != Op1.getValueType() || !VT.isSimple() || !VT.isInteger())
return SDValue();
APInt SplatVal;
@ -45816,17 +45814,17 @@ static SDValue combineAndMaskToShift(SDNode *N, SelectionDAG &DAG,
if (isBitwiseNot(Op0))
return SDValue();
if (!supportedVectorShiftWithImm(VT0.getSimpleVT(), Subtarget, ISD::SRL))
if (!supportedVectorShiftWithImm(VT.getSimpleVT(), Subtarget, ISD::SRL))
return SDValue();
unsigned EltBitWidth = VT0.getScalarSizeInBits();
unsigned EltBitWidth = VT.getScalarSizeInBits();
if (EltBitWidth != DAG.ComputeNumSignBits(Op0))
return SDValue();
SDLoc DL(N);
unsigned ShiftVal = SplatVal.countTrailingOnes();
SDValue ShAmt = DAG.getTargetConstant(EltBitWidth - ShiftVal, DL, MVT::i8);
SDValue Shift = DAG.getNode(X86ISD::VSRLI, DL, VT0, Op0, ShAmt);
SDValue Shift = DAG.getNode(X86ISD::VSRLI, DL, VT, Op0, ShAmt);
return DAG.getBitcast(N->getValueType(0), Shift);
}