Google Git
Sign in
llvm / llvm-project / 1e7772abcbe1ccf3fd6f2bdf5216f3dabeb55c94
commit1e7772abcbe1ccf3fd6f2bdf5216f3dabeb55c94[log] [tgz]
authorKrzysztof Parzyszek <Krzysztof.Parzyszek@amd.com>Wed Aug 13 15:53:59 2025 -0500
committerGitHub <noreply@github.com>Wed Aug 13 15:53:59 2025 -0500
tree9f401f6833d487adf27b5c3249e68ad8f9d214c3
parentaf87214b849ba064dbe6dc13972b29cc49662fd2 [diff]
[flang][OpenMP] Reassociate ATOMIC update expressions (#153488)

An atomic update expression of form
  x = x + a + b
is technically illegal, since the right-hand side is parsed as (x+a)+b,
and the atomic variable x should be an argument to the top-level +. When
the type of x is integer, the result of (x+a)+b is guaranteed to be the
same as x+(a+b), so instead of reporting an error, the compiler can
treat (x+a)+b as x+(a+b).

This PR implements this kind of reassociation for integral types, and
for the two arithmetic associative/commutative operators: + and *.

Reinstate PR153098 one more time with fixes for the issues that came up:
- unused variable "lsrc",
- use of ‘outer1’ before deduction of ‘auto’.
5 files changed
tree: 9f401f6833d487adf27b5c3249e68ad8f9d214c3
  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. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. polly/
  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

OpenSSF Scorecard OpenSSF Best Practices libc++

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.

Getting in touch

Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.