[PATCH] D109194: [InstCombine] Optimize (a & b) | (~a & c)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

This is an alternative bit select pattern - do we know if many backends match this pattern as well as the more common (a & b) | (~a & c) to their bit select instructions (bsl/pcmov/etc.)?

The xor pattern is better on SSE for cases where b and c were both constants, plus its entirely commutable.


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  https://reviews.llvm.org/D109194/new/

https://reviews.llvm.org/D109194