diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index fb939daab57..306a7c5590f 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -9959,17 +9959,18 @@ static SDValue lowerVectorShuffle(SDValue Op, const X86Subtarget *Subtarget, ++LowV2Elements; else if (M >= 0) ++LowV1Elements; - if (LowV2Elements > LowV1Elements) - return DAG.getCommutedVectorShuffle(*SVOp); - - int SumV1Indices = 0, SumV2Indices = 0; - for (int i = 0, Size = SVOp->getMask().size(); i < Size; ++i) - if (SVOp->getMask()[i] >= NumElements) - SumV2Indices += i; - else if (SVOp->getMask()[i] >= 0) - SumV1Indices += i; - if (SumV2Indices < SumV1Indices) + if (LowV2Elements > LowV1Elements) { return DAG.getCommutedVectorShuffle(*SVOp); + } else if (LowV2Elements == LowV1Elements) { + int SumV1Indices = 0, SumV2Indices = 0; + for (int i = 0, Size = SVOp->getMask().size(); i < Size; ++i) + if (SVOp->getMask()[i] >= NumElements) + SumV2Indices += i; + else if (SVOp->getMask()[i] >= 0) + SumV1Indices += i; + if (SumV2Indices < SumV1Indices) + return DAG.getCommutedVectorShuffle(*SVOp); + } } // For each vector width, delegate to a specialized lowering routine. |
