[all-commits] [llvm/llvm-project] e2510b: [clang] SourceManager: Cache offsets for LastFileI...

[Haojian Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e2510b189dae1a18c1e84ea69c99ff417950e03a
      https://github.com/llvm/llvm-project/commit/e2510b189dae1a18c1e84ea69c99ff417950e03a
  Author: Haojian Wu <hokein.wu at gmail.com>
  Date:   2025-07-04 (Fri, 04 Jul 2025)

  Changed paths:
    M clang/include/clang/Basic/SourceManager.h
    M clang/lib/Basic/SourceManager.cpp

  Log Message:
  -----------
  [clang] SourceManager: Cache offsets for LastFileIDLookup to speed up getFileID (#146782)

`getFileID` is a hot method. By caching the offset range in
`LastFileIDLookup`, we can more quickly check whether a given offset
falls within it, avoiding calling `isOffsetInFileID`.

https://llvm-compile-time-tracker.com/compare.php?from=0588e8188c647460b641b09467fe6b13a8d510d5&to=64843a500f0191b79a8109da9acd7e80d961c7a3&stat=instructions:u



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