[all-commits] [llvm/llvm-project] daa9ec: [X86] combineConcatVectorOps - concat(roti(x, i), ro...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: daa9ecff7ea3ed9a99fd5b486516495655259971
      https://github.com/llvm/llvm-project/commit/daa9ecff7ea3ed9a99fd5b486516495655259971
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-06-12 (Fri, 12 Jun 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512f.ll

  Log Message:
  -----------
  [X86] combineConcatVectorOps - concat(roti(x,i),roti(y,i)) -> roti(concat(x,y),i) on non-vlx targets (#203528)

128/256-bit rotates are widened in tablegen, we don't need to limit
these to VLX targets - any AVX512 target can perform these

We already have test coverage to ensure 128-bit XOP rotates don't get
concatenated to 256-bit



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