Google Git
Sign in
android / platform / external / opencl / llvm-project / 0ba456fcc6b1c8504f1596f6f5cb2c188a869ac7
commit0ba456fcc6b1c8504f1596f6f5cb2c188a869ac7[log] [tgz]
authorYao Zi <ziyao@disroot.org>Sat Jun 28 16:47:05 2025 +0800
committerGitHub <noreply@github.com>Sat Jun 28 16:47:05 2025 +0800
tree3ec6c27c63745dccd569b7360530a44e95181039
parente34e02128ec5eb89e36a8f0f7307dcbcfecabbee [diff]
[Clang][LoongArch] Match GCC behaviour when parsing FPRs in asm clobbers (#138391)

There're four possible formats to refer a register in inline assembly,

1. Numeric name without dollar sign ("f0")
2. Numeric name with dollar sign ("$f0")
3. ABI name without dollar sign ("fa0")
4. ABI name with dollar sign ("$fa0")

LoongArch GCC accepts 1 and 2 for FPRs before r15-8284[1] and all these
formats after the chagne. But Clang supports only 2 and 4 for FPRs. The
inconsistency has caused compatibility issues, such as QEMU's case[2].

This patch follows 0bbf3ddf5fea ("[Clang][LoongArch] Add GPR alias
handling without `$` prefix") and accepts FPRs without dollar sign
prefixes as well to keep aligned with GCC, avoiding future compatibility
problems.

Link:
https://gcc.gnu.org/cgit/gcc/commit/?id=d0110185eb78f14a8e485f410bee237c9c71548d
[1]
Link:
https://lore.kernel.org/qemu-devel/20250314033150.53268-3-ziyao@disroot.org/
[2]
3 files changed
tree: 3ec6c27c63745dccd569b7360530a44e95181039
  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. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-format-ignore
  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

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.