[PATCH] D76727: [VectorCombine] transform bitcasted shuffle to narrower elements

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 252582.
spatel marked an inline comment as done.
spatel added a comment.

Patch updated:

1. Fix bug in cost calc - types were inverted (the new shuffle is executed in the destination type).
2. Added code comment to explain the cost calc.
3. Added negative tests and test comments.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76727/new/

https://reviews.llvm.org/D76727

Files:
  llvm/lib/Transforms/Vectorize/VectorCombine.cpp
  llvm/test/Transforms/VectorCombine/X86/shuffle.ll

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