[PATCH] D139496: [CMake] Use perf with LBR for clang-bolt (WIP)

[Amir Ayupov via Phabricator via cfe-commits]

Amir created this revision.
Amir added reviewers: bolt, phosek.
Herald added a project: All.
Amir requested review of this revision.
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`perf` provides a faster and easier way to collect BOLT
profile. Generalize CMake handling of applying BOLT to
Clang to allow using perf with or without LBR stacks
for profile collection.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139496

Files:
  clang/CMakeLists.txt
  clang/cmake/caches/BOLT.cmake

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