[PATCH] D19228: [X86][AVX2] Prefer VPERMQ/VPERMPD over VPERM2I128/VPERM2F128 for unary shuffles

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: mkuper, andreadb, spatel.
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Using VPERMQ/VPERMPD allows memory folding of the (repeated) input where VPERM2I128/VPERM2F128 can not.

Repository:
  rL LLVM

http://reviews.llvm.org/D19228

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx-vperm2x128.ll
  test/CodeGen/X86/vector-shuffle-256-v16.ll
  test/CodeGen/X86/vector-shuffle-256-v32.ll
  test/CodeGen/X86/vector-shuffle-256-v4.ll
  test/CodeGen/X86/vector-shuffle-256-v8.ll
  test/CodeGen/X86/vector-shuffle-combining.ll

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