[PATCH] D74268: [X86] Add back fmaddsub intrinsics to work towards fixing the strict fp implementation

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I agree that its unlikely we won't lose much combine potential - we could add demanded elts support to simplify to fmadd/fmsub but that isn't that likely tbh.

Can the the fmsubadd variants still safely use the fneg ?

Are we missing AVX512 FMADDSUB_RND variants?


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https://reviews.llvm.org/D74268