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llvm / llvm-project / 1914184e5c84d5e978512cfe790e3653a02bcb8e
commit1914184e5c84d5e978512cfe790e3653a02bcb8e[log] [tgz]
authorMarina Taylor <marina_taylor@apple.com>Wed May 14 14:21:52 2025 +0100
committerGitHub <noreply@github.com>Wed May 14 14:21:52 2025 +0100
tree6e996b18e883d02aa4c3c55a14acaa273702ffc8
parenta31d7d1a2480708e665bd8556a5f0013f6350322 [diff]
Reland "[ObjCARC][Contract] Optimize bundled RetainRV to ClaimRV" (#139889)

This teaches ObjCARCContract to transform attachedcall bundles
referencing objc_retainAutoreleasedReturnValue to instead reference
objc_claimAutoreleasedReturnValue.

The only distinction between the two is that the latter is required to
be guaranteed to immediately follow the call it's attached to, and, by
construction, the bundles always achieve that by:
- not being separable from the call through IR and the backend
- not getting the marker emitted when claimARV is the attachedcall.

This is enabled only for arm64, arm64e, and arm64_32 on macOS13/iOS16
and related operating systems.

Co-authored-by: Ahmed Bougacha <ahmed@bougacha.org>
7 files changed
tree: 6e996b18e883d02aa4c3c55a14acaa273702ffc8
  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-format-ignore
  30. .clang-tidy
  31. .git-blame-ignore-revs
  32. .gitattributes
  33. .gitignore
  34. .mailmap
  35. CODE_OF_CONDUCT.md
  36. CONTRIBUTING.md
  37. LICENSE.TXT
  38. pyproject.toml
  39. README.md
  40. 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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Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

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