[all-commits] [llvm/llvm-project] 6ec66a: [X86] Move VPERMV3(X, M, Y) -> VPERMV(M, CONCAT(X, Y))...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6ec66a2292a7321811700ce455cf404bdaa67fc0
      https://github.com/llvm/llvm-project/commit/6ec66a2292a7321811700ce455cf404bdaa67fc0
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-04-03 (Thu, 03 Apr 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86] Move VPERMV3(X,M,Y) -> VPERMV(M,CONCAT(X,Y)) fold after general VPERMV3 canonicalization

Pulled out of #133923 - this prevents regressions with SimplifyDemandedVectorEltsForTargetNode exposing VPERMV3(X,M,X) repeated operand patterns which were getting concatenated to wider VPERMV nodes before simpler canonicalizations could clean them up.



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