[all-commits] [llvm/llvm-project] 503c44: [CycleInfo] Drop GraphTraits and df_iterator. NFC ...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 503c44707051a2c1b804013e40c26714030dfc18
      https://github.com/llvm/llvm-project/commit/503c44707051a2c1b804013e40c26714030dfc18
  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
    M llvm/lib/Transforms/Utils/FixIrreducible.cpp

  Log Message:
  -----------
  [CycleInfo] Drop GraphTraits and df_iterator. NFC (#209847)

depth_first uses SmallPtrSet visited-set, which is pure overhead on a
tree. Replace them with explicit child-stack walks and delete the unused
GraphTraits specializations to prevent misuse.



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