[PATCH] D81491: [InstCombine] reassociate FP diff of sums into sum of diffs

[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 as long as the fast math flags are OK.

I'm not sure if the integer add equivalent combine would be useful (yet)? It probably wouldn't help with PSAD cases tbh.


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