[all-commits] [llvm/llvm-project] d9f116: [X86] Combine VPERMV3 to VPERMV for i8/i16 (#96414)

Phoebe Wang via All-commits all-commits at lists.llvm.org
Sun Jun 30 01:53:16 PDT 2024


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d9f1166732fa43d558f5a656e8cb2173f07cf5e8
      https://github.com/llvm/llvm-project/commit/d9f1166732fa43d558f5a656e8cb2173f07cf5e8
  Author: Phoebe Wang <phoebe.wang at intel.com>
  Date:   2024-06-30 (Sun, 30 Jun 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx512-shuffles/partial_permute.ll
    M llvm/test/CodeGen/X86/shuffle-vs-trunc-512.ll

  Log Message:
  -----------
  [X86] Combine VPERMV3 to VPERMV for i8/i16 (#96414)

VPERM[I,T]2[B,W] are 3 uops on Skylake and Icelake so we try to use
VPERMV.



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