[all-commits] [llvm/llvm-project] 07b439: [X86] combineConcatVectorOps - require free concat...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 07b439605a4cc838a9157f6a948edb0369adeada
      https://github.com/llvm/llvm-project/commit/07b439605a4cc838a9157f6a948edb0369adeada
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-04-11 (Fri, 11 Apr 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx512fp16-frem.ll
    M llvm/test/CodeGen/X86/vector-half-conversions.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-4.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-7.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-8.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-7.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-8.ll

  Log Message:
  -----------
  [X86] combineConcatVectorOps - require free concatenation of at least one operand of UNPCKL\H (#135366)

Stop just replacing 2*UNPCK+INSERT_SUBVECTOR with 2*INSERT_SUBVECTOR+UNPCK

Currently limited to sub-64-bit element cases until we've accounted for the remaining regressions from some build_vector style patterns.



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