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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-12-31 18:59:30 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-12-31 18:59:30 +0000 |
| commit | b0006753741fe0105e85a684e075e431ba772333 (patch) | |
| tree | d9c0749c431e1a9c6868aa3cf4df4cd4f5b31dab /llvm/lib/Target/X86/X86ISelLowering.cpp | |
| parent | bb93578108c522906016fd851d1a8fa63bc048f5 (diff) | |
| download | bcm5719-llvm-b0006753741fe0105e85a684e075e431ba772333.tar.gz bcm5719-llvm-b0006753741fe0105e85a684e075e431ba772333.zip | |
[X86][AVX2] Combine extract(broadcast(scalar_value)) --> scalar_value
As it has a scalar source we don't treat it as a target shuffle so needs special handling.
llvm-svn: 321610
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 19bff03f26a..b8eea1ca2be 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -30923,6 +30923,11 @@ static SDValue combineExtractWithShuffle(SDNode *N, SelectionDAG &DAG, if (SrcSVT == MVT::i1 || !isa<ConstantSDNode>(Idx)) return SDValue(); + // Handle extract(broadcast(scalar_value)), it doesn't matter what index is. + if (X86ISD::VBROADCAST == Src.getOpcode() && + Src.getOperand(0).getValueType() == VT) + return Src.getOperand(0); + // Resolve the target shuffle inputs and mask. SmallVector<int, 16> Mask; SmallVector<SDValue, 2> Ops; |
