[PATCH] D33391: [DAGCombine] fold (add/uaddo (xor a, -1), 1) -> (sub 0, a)

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix added a comment.

This kicks in for fold-pcmpeqd-2.ll . Looking at the assembly, things looks good, but I'm not really sure what this test is testing for, so if someone familiar could advice on what to do, that'd be great. @chandlerc , @dblaikie you worked on that, can you advice ?


https://reviews.llvm.org/D33391