[PATCH] D125588: [MachineCombiner] Improve MachineCombiner's cost model

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

Thanks - do you have AArch64 numbers? The MachineCombiner does seem to be used on X86, but to a much smaller degree than on AArch64 where there are many more patterns.  The reassociation might be useful, but it is the converting madd to mul+add and the fmla changes that are more worrying.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D125588/new/

https://reviews.llvm.org/D125588