[PATCH] D44043: [DAGCombine] Remove AND in SETCC if we can prove they are unneeded

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

Random idea - would a more general approach be for us to compute undefined bits as well as one/zero bits - either adding them to the KnownBits struct or add it separately?


https://reviews.llvm.org/D44043