[PATCH] D91038: [LoopIdiom] Introduce 'left-shift until bittest' idiom

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 309874.
lebedev.ri added a comment.

Rebased. Small tidyups.

Originally, i allowed the wrong instruction to liveout - in my motivational example
i need `%x.next` to liveout, but i allowed only %x.curr.
So let's just allow both of them to liveout.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91038/new/

https://reviews.llvm.org/D91038

Files:
  llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
  llvm/test/Transforms/LoopIdiom/X86/left-shift-until-bittest.ll

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