diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -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 c518b354471..dab97501b85 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -13309,6 +13309,12 @@ static SDValue lowerV4I64VectorShuffle(const SDLoc &DL, ArrayRef<int> Mask, lowerVectorShuffleWithUNPCK(DL, MVT::v4i64, Mask, V1, V2, DAG)) return V; + // Try to create an in-lane repeating shuffle mask and then shuffle the + // the results into the target lanes. + if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( + DL, MVT::v4i64, V1, V2, Mask, Subtarget, DAG)) + return V; + // Try to simplify this by merging 128-bit lanes to enable a lane-based // shuffle. However, if we have AVX2 and either inputs are already in place, // we will be able to shuffle even across lanes the other input in a single |
