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llvm / llvm-project / 6626e6acfee0d22423e258bdcfc8e54045b0d88d
commit6626e6acfee0d22423e258bdcfc8e54045b0d88d[log] [tgz]
authorKeith Smiley <keithbsmiley@gmail.com>Mon Sep 15 10:32:24 2025 -0700
committerGitHub <noreply@github.com>Mon Sep 15 10:32:24 2025 -0700
tree3023866731546f697ac2c887c691a5ea4ac26dfb
parent488ce6bc486ce5755fb151ce54f1214c7002fe55 [diff]
[bazel] Update tblgen rules to support path-mapping (#158354)

Path mapping is a feature of bazel that allows actions to be
deduplicated across bazel transitions if they are otherwise identical.
This is helpful if you build a binary in N transitions, where the
settings differences are irrelevant to this action. In our case we build
multiple python native extensions transitioning on the python version
they target, and before this change would run each of these actions once
per python version even though the outputs would be identical.

This is a no-op unless `--experimental_output_paths=strip` is passed.

The changes here are just enough to make bazel automatically remap the
paths, which is done by how you use the args object. The core change is
that instead of carrying around paths that have `ctx.bin_dir` hardcoded
in the strings. This is done by mapping them with the output file
object's root path when adding them to the args.

As a side effect this drops the genfiles_dir, but that has been the same
as bin_dir for a long time so hopefully that's a no-op for folks.
1 file changed
tree: 3023866731546f697ac2c887c691a5ea4ac26dfb
  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. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. 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.