[PATCH] D123629: [InstCombine] Fold memrchr calls with a constant character.

[Martin Sebor via Phabricator via llvm-commits]

msebor updated this revision to Diff 422638.
msebor added a comment.

Simplify folding when `Len` is constant and handle subset of cases when it isn't.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D123629/new/

https://reviews.llvm.org/D123629

Files:
  llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
  llvm/test/Transforms/InstCombine/memrchr-3.ll

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