[all-commits] [llvm/llvm-project] 0eac97: RegisterCoalescer: Remove empty subranges after me...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0eac970fa7478ddf0083dc2a0a5c476ca3bb615a
      https://github.com/llvm/llvm-project/commit/0eac970fa7478ddf0083dc2a0a5c476ca3bb615a
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-13 (Sun, 13 Sep 2026)

  Changed paths:
    M llvm/lib/CodeGen/RegisterCoalescer.cpp
    A llvm/test/CodeGen/AArch64/coalescer-empty-subrange-early-lis.ll

  Log Message:
  -----------
  RegisterCoalescer: Remove empty subranges after merging subranges (#222050)

Merging subranges in joinVirtRegs didn't try to clear empty ranges after
refineSubRanges, manifesting in an assert in overlaps checks later.

Exposed with subregister liveness once LiveIntervals runs before
TwoAddress.

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



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications