[PATCH] D152673: [InstCombine] Canonicalize `(X^(X-1)) u{ge, lt} X` as pow2 test

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n created this revision.
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Also hoist the current canoniclizations from `foldICmpEquality` to
keep all the logic in the same place.
https://alive2.llvm.org/ce/z/T8osF6


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152673

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/ispow2.ll

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