[PATCH] D91726: [LoopIdiom] 'left-shift until bittest' idiom: support canonical sign bit mask

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 306167.
lebedev.ri marked an inline comment as done.
lebedev.ri added a comment.

Do recurrence analysis afterwards, not when matching backedge condition.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91726/new/

https://reviews.llvm.org/D91726

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

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