[PATCH] D37893: [X86] Prefer VPERMQ over VPERM2F128 for any unary shuffle, not just the ones that can be done with a insertf128

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.

The early out for AVX2 in lowerV2X128VectorShuffle is positioned in a weird spot below some shuffle mask equivalency checks.

But I think we want to allow VPERMQ for any unary shuffle.


https://reviews.llvm.org/D37893

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx-vperm2x128.ll
  test/CodeGen/X86/avx512-shuffles/partial_permute.ll
  test/CodeGen/X86/vector-shuffle-256-v8.ll

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