[PATCH] D115646: [DAG][TLI][X86][ARM][AArch64] Add `isExtractSubvectorFree` / use it in `foldExtractSubvectorFromShuffleVector()`

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

ping
@RKSimon this removes the hardcoded assumptions that the free extraction is for 0'th subvector specifically, as we've discussed in D104156 <https://reviews.llvm.org/D104156> originally.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D115646/new/

https://reviews.llvm.org/D115646