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[X86][AVX] Remove redundant EXTRACT_VECTOR_ELT(VBROADCAST(SCALAR())) fold 

Noticed while looking for similar cases to rG931ec74f7a29 - SimplifyDemandedVectorElts and shuffle combining both should handle this now.
This commit is contained in:
Simon Pilgrim 2020-07-07 20:30:16 +01:00
parent bee8cdcabd
commit c00a27752e
1 changed files with 0 additions and 3 deletions
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3
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -38963,9 +38963,6 @@ static SDValue combineExtractWithShuffle(SDNode *N, SelectionDAG &DAG,
// Handle extract(bitcast(broadcast(scalar_value))).
if (X86ISD::VBROADCAST == SrcBC.getOpcode()) {
SDValue SrcOp = SrcBC.getOperand(0);
if (SrcOp.getValueSizeInBits() == VT.getSizeInBits())
return DAG.getBitcast(VT, SrcOp);
EVT SrcOpVT = SrcOp.getValueType();
if (SrcOpVT.isScalarInteger() && VT.isInteger() &&
(SrcOpVT.getSizeInBits() % SrcEltBits) == 0) {