[all-commits] [llvm/llvm-project] 3fee8b: [GISel] LegalizationArtifactCombiner: Elide redund...

[Sergei Barannikov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3fee8b346928a24975ebbd6984b583c01ec82955
      https://github.com/llvm/llvm-project/commit/3fee8b346928a24975ebbd6984b583c01ec82955
  Author: Sergei Barannikov <barannikov88 at gmail.com>
  Date:   2024-05-30 (Thu, 30 May 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-min-max.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-select.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-saddo.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-ssubo.mir
    M llvm/test/CodeGen/ARM/GlobalISel/arm-legalize-exts.mir
    M llvm/test/CodeGen/Mips/GlobalISel/legalizer/constants.mir
    M llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/rem_and_div.ll
    M llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/sitofp_and_uitofp.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/jumptable.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-abs-rv32.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-abs-rv64.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-jump-table-brjt-rv64.mir

  Log Message:
  -----------
  [GISel] LegalizationArtifactCombiner: Elide redundant G_SEXT_INREG (#93687)

This is similar to 373c343a, but for targets with zero-or-negative-one
booleans.
The difference in tests is mostly due to G_SEXT_INREG being illegal for
some targets, in which case it gets expanded into G_SHL/G_ASHR pair,
which is not currently optimized by the combiner.



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