diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 54a64052ebb..cd6821c16e8 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -45103,7 +45103,6 @@ static SDValue combineExtractSubvector(SDNode *N, SelectionDAG &DAG, SDValue InVec = N->getOperand(0); SDValue InVecBC = peekThroughBitcasts(InVec); EVT InVecVT = InVec.getValueType(); - EVT InVecBCVT = InVecBC.getValueType(); const TargetLowering &TLI = DAG.getTargetLoweringInfo(); if (Subtarget.hasAVX() && !Subtarget.hasAVX2() && @@ -45147,31 +45146,6 @@ static SDValue combineExtractSubvector(SDNode *N, SelectionDAG &DAG, VT, SDLoc(N), InVec.getNode()->ops().slice(IdxVal, VT.getVectorNumElements())); - // Try to move vector bitcast after extract_subv by scaling extraction index: - // extract_subv (bitcast X), Index --> bitcast (extract_subv X, Index') - // TODO: Move this to DAGCombiner::visitEXTRACT_SUBVECTOR - if (InVec != InVecBC && InVecBCVT.isVector()) { - unsigned SrcNumElts = InVecBCVT.getVectorNumElements(); - unsigned DestNumElts = InVecVT.getVectorNumElements(); - if ((DestNumElts % SrcNumElts) == 0) { - unsigned DestSrcRatio = DestNumElts / SrcNumElts; - if ((VT.getVectorNumElements() % DestSrcRatio) == 0) { - unsigned NewExtNumElts = VT.getVectorNumElements() / DestSrcRatio; - EVT NewExtVT = EVT::getVectorVT(*DAG.getContext(), - InVecBCVT.getScalarType(), NewExtNumElts); - if ((N->getConstantOperandVal(1) % DestSrcRatio) == 0 && - TLI.isOperationLegalOrCustom(ISD::EXTRACT_SUBVECTOR, NewExtVT)) { - unsigned IndexValScaled = N->getConstantOperandVal(1) / DestSrcRatio; - SDLoc DL(N); - SDValue NewIndex = DAG.getIntPtrConstant(IndexValScaled, DL); - SDValue NewExtract = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, NewExtVT, - InVecBC, NewIndex); - return DAG.getBitcast(VT, NewExtract); - } - } - } - } - // If we are extracting from an insert into a zero vector, replace with a // smaller insert into zero if we don't access less than the original // subvector. Don't do this for i1 vectors. |
