[PATCH] D124763: [InstCombine] Fold A + (B & ~A) to A | B

[Nikita Popov via Phabricator via llvm-commits]

nikic updated this revision to Diff 426434.
nikic added a comment.

Implement as part of `haveNoCommonBitsSet()` instead.

The second pattern (canonical form for constants) doesn't get fully folded in this case, so this will require an additional `or` fold. But that seems like something we'd want to do anyway.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D124763/new/

https://reviews.llvm.org/D124763

Files:
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/test/Transforms/InstCombine/add.ll

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