[PATCH] D99427: [LoopIdiomRecognize] Teach CTLZ/CTTZ idiom recognition to handle not being able to find a pre-loop check for the input being 0.

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 333734.
craig.topper added a comment.

Add phase ordering test.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99427/new/

https://reviews.llvm.org/D99427

Files:
  llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
  llvm/test/Transforms/LoopIdiom/X86/ctlz.ll
  llvm/test/Transforms/PhaseOrdering/X86/ctlz-loop.ll

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