[PATCH] D107009: [WIP][X86] combineX86ShuffleChain(): canonicalize mask elts picking from splats

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I'm starting to think we might be better off tweaking matchShuffleAsBlend (amongst other matchShuffleAs* methods) to make use of IsElementEquivalent which does something similar to this patch but does it as part of the shuffle mask matching - if you can extend it to handle broadcasts with different element widths it should help as much as this.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D107009/new/

https://reviews.llvm.org/D107009