[all-commits] [llvm/llvm-project] 83ca70: X86: Remove stale EFLAGS live range when convertin...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/codegen/x86-convertto3addr-eflags-lis
  Home:   https://github.com/llvm/llvm-project
  Commit: 83ca7067b298d20f79fc4e3184869f033819021a
      https://github.com/llvm/llvm-project/commit/83ca7067b298d20f79fc4e3184869f033819021a
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-09 (Wed, 09 Sep 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86InstrInfo.cpp
    A llvm/test/CodeGen/X86/twoaddr-lea-eflags-liveintervals.ll

  Log Message:
  -----------
  X86: Remove stale EFLAGS live range when converting ADD to LEA

convertToThreeAddress may rewrite an EFLAGS-clobbering ADD into an LEA, which
does not define EFLAGS. hasLiveCondCodeDef guarantees the EFLAGS def was dead, so
drop its LiveIntervals value, otherwise the verifier would fail.

Fixes verifier errors with -early-live-intervals.

Co-authored-by: Claude (Claude-Opus-4.8)


  Commit: b5cdef27f10b6d2a80000e2888b6941c055ab577
      https://github.com/llvm/llvm-project/commit/b5cdef27f10b6d2a80000e2888b6941c055ab577
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-09 (Wed, 09 Sep 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86InstrInfo.cpp
    M llvm/test/CodeGen/X86/twoaddr-lea-eflags-liveintervals.ll

  Log Message:
  -----------
  review feedback


Compare: https://github.com/llvm/llvm-project/compare/bc82f7161dbb...b5cdef27f10b

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