[PATCH] D145425: [InstCombine] Transform `(icmp ult/uge (and X, Y), X)` -> `(icmp ne/eq (and X, Y), X)`

[Noah Goldstein via Phabricator via llvm-commits]

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eq/ne are generally easier to reason about elsewhere.

ult -> ne: https://alive2.llvm.org/ce/z/5wxXGt
uge -> eq: https://alive2.llvm.org/ce/z/Dw6kqG


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D145425

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-uge-to-icmp-ule.ll
  llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll
  llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ule-to-icmp-ule.ll
  llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll
  llvm/test/Transforms/InstCombine/icmp-of-and-x.ll

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