[PATCH] D96405: [DAGCombiner] Improve reduceBuildVecToShuffle Performance

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

I wonder if we should be checking if the resulting shuffle is legal, i.e. see `buildLegalVectorShuffle()` and it's uses .


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D96405