diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 02f92080431..f5557d340f6 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -11721,6 +11721,17 @@ static SDValue lowerV8F64VectorShuffle(const SDLoc &DL, ArrayRef<int> Mask, // Use low duplicate instructions for masks that match their pattern. if (isShuffleEquivalent(V1, V2, Mask, {0, 0, 2, 2, 4, 4, 6, 6})) return DAG.getNode(X86ISD::MOVDDUP, DL, MVT::v8f64, V1); + + if (!is128BitLaneCrossingShuffleMask(MVT::v8f64, Mask)) { + // Non-half-crossing single input shuffles can be lowered with an + // interleaved permutation. + unsigned VPERMILPMask = (Mask[0] == 1) | ((Mask[1] == 1) << 1) | + ((Mask[2] == 3) << 2) | ((Mask[3] == 3) << 3) | + ((Mask[4] == 5) << 4) | ((Mask[5] == 5) << 5) | + ((Mask[6] == 7) << 6) | ((Mask[7] == 7) << 7); + return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v8f64, V1, + DAG.getConstant(VPERMILPMask, DL, MVT::i8)); + } } if (SDValue Shuf128 = |
