[all-commits] [llvm/llvm-project] 7cef6a: [CycleInfo] Number cycles and move the exit-block ...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7cef6a72a1641cf3841b401782c4434635bf3d73
      https://github.com/llvm/llvm-project/commit/7cef6a72a1641cf3841b401782c4434635bf3d73
  Author: Fangrui Song <i at maskray.me>
  Date:   2026-07-15 (Wed, 15 Jul 2026)

  Changed paths:
    M llvm/include/llvm/ADT/GenericCycleImpl.h
    M llvm/include/llvm/ADT/GenericCycleInfo.h

  Log Message:
  -----------
  [CycleInfo] Number cycles and move the exit-block cache to GenericCycleInfo. NFC

Assign each cycle a preorder ID in layoutBlocks's Euler-tour walk and
move the caches into a lazily allocated table indexed by ID, shrinking
sizeof(GenericCycle) from 128 to 80. appendEntry/setSingleEntry no
longer invalidate: the exit-block set does not depend on entries. Delete
the unused GenericCycle::clear.

Aided by Claude Fable 5

Pull Request: https://github.com/llvm/llvm-project/pull/209666



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