diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 839b285b8df..4d090529784 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -9096,11 +9096,16 @@ static SDValue lowerV16I8VectorShuffle(SDValue Op, SDValue V1, SDValue V2, MVT::v16i8, V1, V1); int PostDupI16Shuffle[8] = {-1, -1, -1, -1, -1, -1, -1, -1}; - for (int i = 0; i < 16; i += 2) { - if (Mask[i] != -1) - PostDupI16Shuffle[i / 2] = LaneMap[Mask[i]] - (TargetLo ? 0 : 8); - assert(PostDupI16Shuffle[i / 2] < 8 && "Invalid v8 shuffle mask!"); - } + for (int i = 0; i < 16; ++i) + if (Mask[i] != -1) { + int MappedMask = LaneMap[Mask[i]] - (TargetLo ? 0 : 8); + assert(MappedMask < 8 && "Invalid v8 shuffle mask!"); + if (PostDupI16Shuffle[i / 2] == -1) + PostDupI16Shuffle[i / 2] = MappedMask; + else + assert(PostDupI16Shuffle[i / 2] == MappedMask && + "Conflicting entrties in the original shuffle!"); + } return DAG.getNode( ISD::BITCAST, DL, MVT::v16i8, DAG.getVectorShuffle(MVT::v8i16, DL, |
