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fuchsia / third_party / llvm-project / 38a38bb056951bf50c5af7f7562bcbb834259a39
commit38a38bb056951bf50c5af7f7562bcbb834259a39[log] [tgz]
authorSergio Afonso <safonsof@amd.com>Fri Jul 25 13:52:11 2025 +0100
committerSergio Afonso <safonsof@amd.com>Fri Aug 15 15:50:06 2025 +0100
tree4dfa19eda1add589c517bac53aa069ef7fa3940b
parente57c671e6f164cf8fe6cf16ca950ff5b0cc7421c [diff]
[OpenMPOpt] Make parallel regions reachable from new DeviceRTL loop functions

This patch updates the OpenMP optimization pass to know about the new DeviceRTL
functions for loop constructs.

This change marks these functions as potentially containing parallel regions,
which fixes a current bug with the state machine rewrite optimization. It
previously failed to identify parallel regions located inside of the callbacks
passed to these new DeviceRTL functions, causing the resulting code to skip
executing these parallel regions.

As a result, Generic kernels produced by Flang that contain parallel regions
now work properly.

One known related issue not fixed by this patch is that the presence of calls
to these functions will prevent the SPMD-ization of Generic kernels by
OpenMPOpt. Previously, this was due to assuming there was no parallel region.
This is changed by this patch, but instead we now mark it temporarily as
unsupported in an SPMD context. The reason is that, without additional changes,
code intended for the main thread of the team located outside of the parallel
region would not be guarded properly, resulting in race conditions and
generally invalid behavior.
3 files changed
tree: 4dfa19eda1add589c517bac53aa069ef7fa3940b
  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

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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.

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.