[PATCH] D152166: [InstCombine] Expand contractable fmuladd into fmul + fadd

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

Is there a test that shows the actual benefit of this, e..g due to further combines? One potential issue is that (parts of) the cost model won't consider `fadd/fmul` pairs as single instruction, so. there may be negative fallout in things like SLPVectorizer.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D152166/new/

https://reviews.llvm.org/D152166