[PATCH] D58874: [DAGCombiner] fold (add (add (xor a, -1), b), 1) -> (sub b, a)

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix added a comment.

It is interesting that instcombine doesn't do this. I would have expected it to be the case. Let me prepare a patch for it.


Repository:
  rL LLVM

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https://reviews.llvm.org/D58874