[all-commits] [llvm/llvm-project] fd8096: [MIR] Serialize/Deserialize MachineInstr::LRSplit ...

[Quentin Colombet via All-commits]

  Branch: refs/heads/users/qcolombet/split-from-02
  Home:   https://github.com/llvm/llvm-project
  Commit: fd8096bb1fe700db8506f1a00a9cf9505afdc8fe
      https://github.com/llvm/llvm-project/commit/fd8096bb1fe700db8506f1a00a9cf9505afdc8fe
  Author: Quentin Colombet <quentin.colombet at gmail.com>
  Date:   2026-06-12 (Fri, 12 Jun 2026)

  Changed paths:
    M llvm/lib/CodeGen/MIRParser/MILexer.cpp
    M llvm/lib/CodeGen/MIRParser/MILexer.h
    M llvm/lib/CodeGen/MIRParser/MIParser.cpp
    M llvm/lib/CodeGen/MIRPrinter.cpp
    M llvm/lib/CodeGen/MachineInstr.cpp
    M llvm/test/CodeGen/AArch64/nested-iv-regalloc.mir
    M llvm/test/CodeGen/AMDGPU/branch-folding-implicit-def-subreg.ll
    M llvm/test/CodeGen/AMDGPU/bug-undef-spilled-agpr.mir
    M llvm/test/CodeGen/AMDGPU/dead_bundle.mir
    M llvm/test/CodeGen/AMDGPU/extend-phi-subrange-not-in-parent.mir
    M llvm/test/CodeGen/AMDGPU/greedy-global-heuristic.mir
    M llvm/test/CodeGen/AMDGPU/inflate-reg-class-vgpr-mfma-to-agpr-negative-tests.mir
    M llvm/test/CodeGen/AMDGPU/inflate-reg-class-vgpr-mfma-to-av-with-load-source.mir
    M llvm/test/CodeGen/AMDGPU/inflate-reg-class-vgpr-mfma-to-av.mir
    M llvm/test/CodeGen/AMDGPU/inflated-reg-class-snippet-copy-use-after-free.mir
    M llvm/test/CodeGen/AMDGPU/infloop-subrange-spill-inspect-subrange.mir
    M llvm/test/CodeGen/AMDGPU/infloop-subrange-spill.mir
    M llvm/test/CodeGen/AMDGPU/partial-regcopy-and-spill-missed-at-regalloc.ll
    M llvm/test/CodeGen/AMDGPU/ra-inserted-scalar-instructions.mir
    M llvm/test/CodeGen/AMDGPU/ran-out-of-sgprs-allocation-failure.mir
    M llvm/test/CodeGen/AMDGPU/regalloc-fail-unsatisfiable-overlapping-tuple-hints.mir
    M llvm/test/CodeGen/AMDGPU/regalloc-undef-copy-fold.mir
    M llvm/test/CodeGen/AMDGPU/split-liverange-overlapping-copies.mir
    M llvm/test/CodeGen/AMDGPU/splitkit-copy-bundle.mir
    M llvm/test/CodeGen/AMDGPU/splitkit-copy-live-lanes.mir
    M llvm/test/CodeGen/AMDGPU/splitkit-do-not-undo-subclass-split-with-remat.mir
    M llvm/test/CodeGen/AMDGPU/splitkit.mir
    M llvm/test/CodeGen/AMDGPU/swdev502267-use-after-free-last-chance-recoloring-alloc-succeeds.mir
    A llvm/test/CodeGen/MIR/AMDGPU/lr-split-flag.mir
    M llvm/test/CodeGen/RISCV/pr176001.ll
    M llvm/test/CodeGen/X86/AMX/amx-greedy-ra-spill-shape.ll
    M llvm/test/CodeGen/X86/apx/foldmemory.mir
    M llvm/test/CodeGen/X86/statepoint-invoke-ra-enter-at-end.mir
    M llvm/test/CodeGen/X86/statepoint-invoke-ra-inline-spiller.mir
    M llvm/test/CodeGen/X86/statepoint-invoke-ra.mir
    M llvm/test/DebugInfo/MIR/X86/dvl-livedebugvars-movements.mir
    M llvm/test/DebugInfo/MIR/X86/dvl-livedebugvars-stackptr.mir
    M llvm/utils/UpdateTestChecks/mir.py

  Log Message:
  -----------
  [MIR] Serialize/Deserialize MachineInstr::LRSplit attribute

The LRSplit MachineInstr flag is set by SplitKit on copies inserted for
live-range splitting.
Until now the flag had no MIR-text representation.

This patch fixes that so that it gets easier to reproduce/capture issues
that involves SplitKit.

Round-trip coverage in
llvm/test/CodeGen/MIR/AMDGPU/lr-split-flag.mir.



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