diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 0d781b5fe4f..7ecb3d14855 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -9046,6 +9046,12 @@ static SDValue lowerV8I16VectorShuffle(SDValue Op, SDValue V1, SDValue V2, Mask, Subtarget, DAG)) return V; + // Use dedicated unpack instructions for masks that match their pattern. + if (isShuffleEquivalent(Mask, 0, 8, 1, 9, 2, 10, 3, 11)) + return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, V1, V2); + if (isShuffleEquivalent(Mask, 4, 12, 5, 13, 6, 14, 7, 15)) + return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i16, V1, V2); + if (Subtarget->hasSSE41()) if (SDValue Blend = lowerVectorShuffleAsBlend(DL, MVT::v8i16, V1, V2, Mask, Subtarget, DAG)) |
