[PATCH] D31960: [InstSimplify] fold identity shuffles (recursing if needed)

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 95020.
spatel marked 3 inline comments as done.
spatel added a comment.

Patch updated:

1. Make name more descriptive: "foldIdentityShuffles".
2. Add comment about the per-element limit for recursion.
3. Add TODO about bitcasts.
4. Add test case with an undef mask element - not sure what's best in this case. See earlier example.


https://reviews.llvm.org/D31960

Files:
  lib/Analysis/InstructionSimplify.cpp
  test/Transforms/InstSimplify/shufflevector.ll

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