[PATCH] D66071: [X86] Teach lowerV4I32Shuffle to only use broadcasts if the mask has more than one undef element. Prioritize shifts over broadcast in lowerV8I16Shuffle.

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 215757.
craig.topper added a comment.

Rebase


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66071/new/

https://reviews.llvm.org/D66071

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/avg.ll
  llvm/test/CodeGen/X86/avx512-shuffles/partial_permute.ll
  llvm/test/CodeGen/X86/insertelement-shuffle.ll
  llvm/test/CodeGen/X86/shuffle-vs-trunc-512.ll
  llvm/test/CodeGen/X86/sse41.ll
  llvm/test/CodeGen/X86/vector-reduce-add.ll
  llvm/test/CodeGen/X86/vector-shuffle-128-v4.ll
  llvm/test/CodeGen/X86/vector-shuffle-128-v8.ll
  llvm/test/CodeGen/X86/vector-shuffle-512-v16.ll
  llvm/test/CodeGen/X86/vector-shuffle-combining.ll

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