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[X86] combineOrShiftToFunnelShift - remove shift by immediate handling. 

Now that D75114 has landed, DAGCombiner handles this case so the code is redundant.
This commit is contained in:
Simon Pilgrim 2020-03-12 11:46:28 +00:00
parent 3f8e714e2f
commit 4689eae820
1 changed files with 0 additions and 4 deletions
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4
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -41626,10 +41626,6 @@ static SDValue combineOrShiftToFunnelShift(SDNode *N, SelectionDAG &DAG,
ShAmt1Op1 == ShAmt0)
return GetFunnelShift(Op0, Op1, ShAmt0);
}
} else if (auto *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
auto *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
if (ShAmt0C && (ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue()) == Bits)
return GetFunnelShift(Op0, Op1, ShAmt0);
} else if (ShAmt1.getOpcode() == ISD::XOR) {
SDValue Mask = ShAmt1.getOperand(1);
if (auto *MaskC = dyn_cast<ConstantSDNode>(Mask)) {