[PATCH] D56784: [X86][SSE] Use PSLLDQ/PSRLDQ to mask out zeroable ends of a shuffle

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 184065.
RKSimon added a comment.

rebased and updated comments


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56784/new/

https://reviews.llvm.org/D56784

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/buildvec-extract.ll
  test/CodeGen/X86/vector-shuffle-128-v16.ll
  test/CodeGen/X86/vector-shuffle-128-v8.ll
  test/CodeGen/X86/vector-shuffle-sse4a.ll

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