[all-commits] [llvm/llvm-project] 6ac687: [X86] Add test coverage for #137422 (#182832)

[Simon Pilgrim via All-commits]

  Branch: refs/heads/release/22.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 6ac68778a76e1c0ab62b3cc8ac555f349bf62048
      https://github.com/llvm/llvm-project/commit/6ac68778a76e1c0ab62b3cc8ac555f349bf62048
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-06-01 (Mon, 01 Jun 2026)

  Changed paths:
    M llvm/test/CodeGen/X86/vector-shuffle-512-v64.ll

  Log Message:
  -----------
  [X86] Add test coverage for #137422 (#182832)

(cherry picked from commit 0e3a96d0ec01e3575674d72c4e23bf98affdca28)


  Commit: c43c9b426055a78abbd3f7751865b6fb0d717fff
      https://github.com/llvm/llvm-project/commit/c43c9b426055a78abbd3f7751865b6fb0d717fff
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-06-01 (Mon, 01 Jun 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-512-v64.ll

  Log Message:
  -----------
  [X86] lowerV64I8Shuffle - prefer VPERMV3 byte shuffles to OR(PSHUFB,PSHUFB) on VBMI targets (#182852)

Minor improvement for #137422

(cherry picked from commit 8f5880d3ae4e5dfc748985d90e5413671028aa3e)


  Commit: 6db0725886bb9fafab67f2eb362d4b84354fe7de
      https://github.com/llvm/llvm-project/commit/6db0725886bb9fafab67f2eb362d4b84354fe7de
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-06-01 (Mon, 01 Jun 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-512-v64.ll

  Log Message:
  -----------
  [X86] lowerV64I8Shuffle - avoid lowerShuffleAsRepeatedMaskAndLanePermute call on VBMI targets (#183109)

Shuffle combining fails to fold the inner shuffles first, but luckily the LanePermuteAnd* methods are enough if we have VPERMB as a fallback

Fixes #137422

(cherry picked from commit 1b9fea021840f17c41ea980300d0fc45e7285909)


Compare: https://github.com/llvm/llvm-project/compare/ad9524f38657...6db0725886bb

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