[PATCH] D126775: [x86] fix miscompile from wrongly identified fneg

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon accepted this revision.
RKSimon added a comment.
This revision is now accepted and ready to land.

LGTM - its annoying that we don't see the XOR constants, but the 2 XORs (mostly) demonstrate what's happening - if it folded to a single XOR it'd be trickier.


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https://reviews.llvm.org/D126775