[all-commits] [llvm/llvm-project] af4d76: [Support] Reduce globaal variable overhead after #...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: af4d76d909b0df79494ca19b7c289c2a5b18c816
      https://github.com/llvm/llvm-project/commit/af4d76d909b0df79494ca19b7c289c2a5b18c816
  Author: Fangrui Song <i at maskray.me>
  Date:   2025-01-10 (Fri, 10 Jan 2025)

  Changed paths:
    M clang/tools/driver/driver.cpp
    M llvm/include/llvm/Support/Timer.h
    M llvm/lib/Support/Timer.cpp

  Log Message:
  -----------
  [Support] Reduce globaal variable overhead after #121663

* Construct frequently-accessed TimerLock/DefaultTimerGroup early to
  reduce overhead.
* Rename `aquireDefaultGroup` to `acquireTimerGlobals` and restore
  ManagedStatic::claim. https://reviews.llvm.org/D76099

* Drop mtg::. We use internal linkage, so mtg:: is unneeded and might
  mislead users. In addition, llvm/ code almost never introduces a named
  namespace not in llvm::. Drop mtg::.
* Replace some unique_ptr with optional to reduce overhead.
* Switch to `functionName()`.
* Simplify `llvm::initTimerOptions` and `TimerGroup::constructForStatistics()`

Pull Request: https://github.com/llvm/llvm-project/pull/122429



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