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chromium / external / github.com / llvm / llvm-project.git / 1757a235e386be908d5df01bb736085270d31686
commit1757a235e386be908d5df01bb736085270d31686[log] [tgz]
authorMircea Trofin <[email protected]>Wed Mar 19 05:03:26 2025
committerGitHub <[email protected]>Wed Mar 19 05:03:26 2025
tree00fd973131ade0547ca315e32575581b582f9721
parentfd0e20a64bde212c20c269e7c1349d703e8159d5 [diff]
[ctxprof] Make ContextRoot an implementation detail (#131416)

`ContextRoot` `FunctionData` are currently known by the llvm side, which has to instantiate and zero-initialize them. 

This patch makes `FunctionData` the only global value that needs to be known and instantiated by the compiler. On the compiler-rt side, `ContextRoot`s are hung off `FunctionData`, when applicable.

This is for two reasons. First, it is a step towards root autodetection (in a subsequent patch). An autodetection mechanism would instantiate the `ContextRoot` for the detected roots, and then `__llvm_ctx_profile_get_context` would detect that and route to `__llvm_ctx_profile_start_context`.

The second reason is that we will hang off `ContextRoot` more complex datatypes (next patch), and we want to avoid too deep of a coupling between llvm and compiler-rt. Acting as a place to hang related data, `FunctionData` can stay simple - pointers and an (atomic) int (the mutex).
5 files changed
tree: 00fd973131ade0547ca315e32575581b582f9721
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libunwind/
  16. lld/
  17. lldb/
  18. llvm/
  19. llvm-libgcc/
  20. mlir/
  21. offload/
  22. openmp/
  23. polly/
  24. pstl/
  25. runtimes/
  26. third-party/
  27. utils/
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. pyproject.toml
  38. README.md
  39. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

Other components include: the libc++ C++ standard library, the LLD linker, and more.

Getting the Source Code and Building LLVM

Consult the Getting Started with LLVM page for information on building and running LLVM.

For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

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