[PATCH] D136582: [InstCombine] fold sub pattern to and

[chenglin.bi via Phabricator via llvm-commits]

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`C - ((C3 -nuw X) & C2) --> X & C2` 
when:
`((C2 & C3) == C)` && `(C3 - C + 1) is Pow2`

https://alive2.llvm.org/ce/z/V4-4YP

Fix: #58523


https://reviews.llvm.org/D136582

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
  llvm/test/Transforms/InstCombine/sub.ll

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