[PATCH] D54267: [X86][SSE] Add lowerVectorShuffleAsByteRotateAndPermute (PR39387)

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Does this change the code generated for rgbcmyk here https://godbolt.org/z/cot3xT    I filed the original PR based on what happened from trying to vectorize it for sse4.2 which we don't currently do, but I think the two vblendvbs in the avx2 output are similar.


Repository:
  rL LLVM

https://reviews.llvm.org/D54267