[llvm] r284823 - [X86][AVX2] Begun generalizing lowering to VPERMD/VPERMPS in preparation for AVX512 support.
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 21 06:00:48 PDT 2016
Author: rksimon
Date: Fri Oct 21 08:00:47 2016
New Revision: 284823
URL: http://llvm.org/viewvc/llvm-project?rev=284823&view=rev
Log:
[X86][AVX2] Begun generalizing lowering to VPERMD/VPERMPS in preparation for AVX512 support.
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=284823&r1=284822&r2=284823&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Fri Oct 21 08:00:47 2016
@@ -25528,16 +25528,17 @@ static bool combineX86ShuffleChain(Array
any_of(Mask, [](int M) { return M == SM_SentinelZero; });
if (is128BitLaneCrossingShuffleMask(MaskVT, Mask)) {
- // If we have a single input lane-crossing shuffle with 32-bit scalars then
- // lower to VPERMD/VPERMPS.
+ // If we have a single input lane-crossing shuffle then lower to VPERMV.
if (UnaryShuffle && (Depth >= 3 || HasVariableMask) && !MaskContainsZeros &&
Subtarget.hasAVX2() && (MaskVT == MVT::v8f32 || MaskVT == MVT::v8i32)) {
- SDValue VPermIdx[8];
- for (int i = 0; i < 8; ++i)
- VPermIdx[i] = Mask[i] < 0 ? DAG.getUNDEF(MVT::i32)
- : DAG.getConstant(Mask[i], DL, MVT::i32);
+ MVT VPermMaskSVT = MVT::getIntegerVT(MaskEltSizeInBits);
+ SmallVector<SDValue, 8> VPermIdx;
+ for (int M : Mask)
+ VPermIdx.push_back(M < 0 ? DAG.getUNDEF(VPermMaskSVT)
+ : DAG.getConstant(M, DL, VPermMaskSVT));
- SDValue VPermMask = DAG.getBuildVector(MVT::v8i32, DL, VPermIdx);
+ MVT VPermMaskVT = MVT::getVectorVT(VPermMaskSVT, NumMaskElts);
+ SDValue VPermMask = DAG.getBuildVector(VPermMaskVT, DL, VPermIdx);
DCI.AddToWorklist(VPermMask.getNode());
Res = DAG.getBitcast(MaskVT, V1);
DCI.AddToWorklist(Res.getNode());
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