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| author | Chandler Carruth <chandlerc@gmail.com> | 2014-11-12 10:05:18 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2014-11-12 10:05:18 +0000 |
| commit | 0c922fcec566d74045af5e09becfe1d251e04040 (patch) | |
| tree | 3d9aac41b67e014e9a2c5854675bcfefc6bc401e /llvm/lib | |
| parent | 9b70a919dbc5d4bd938103446cc1445ab7da9095 (diff) | |
| download | bcm5719-llvm-0c922fcec566d74045af5e09becfe1d251e04040.tar.gz bcm5719-llvm-0c922fcec566d74045af5e09becfe1d251e04040.zip | |
[x86] Start improving the matching of unpck instructions based on test
cases from Halide folks. This initial step was extracted from
a prototype change by Clay Wood to try and address regressions found
with Halide and the new vector shuffle lowering.
llvm-svn: 221779
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)) |
