[PATCH] D75348: [DAGCombiner] recognize shuffle (shuffle X, Mask0), Mask --> splat X

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 247285.
spatel marked 4 inline comments as done.
spatel added a comment.

Patch updated:

1. Added shuffle mask legality check.
2. Improved variable names/logic.
3. Added assert for types.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D75348/new/

https://reviews.llvm.org/D75348

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/arm64-dup.ll
  llvm/test/CodeGen/X86/vector-reduce-mul.ll
  llvm/test/CodeGen/X86/x86-interleaved-access.ll

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