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llvm / llvm-project / 61ba60c15416db03872e94217fcc215371caad5d
commit61ba60c15416db03872e94217fcc215371caad5d[log] [tgz]
authorBen Langmuir <blangmuir@apple.com>Fri Sep 06 08:35:30 2024 -0700
committerGitHub <noreply@github.com>Fri Sep 06 08:35:30 2024 -0700
treef68091d10702fcae0d1da73768029fb09efee8e8
parent4af249fe6e81abd137c95bc25f5060ae305134ca [diff]
[orc] Avoid pathological propogation order (#107488)

In certain pathological object files we were getting extremely slow
linking because we were repeatedly propogating dependencies to the same
blocks instead of accumulating as many changes as possible. Change the
order of iteration so that we go through every node in the worklist
before returning to any previous node, reducing the number of expensive
dependency iterations.

In practice, this took one case from 60 seconds to 2 seconds. Note: the
performance is still non-deterministic, because the block order itself
is non-deterministic.

rdar://133734391
1 file changed
tree: f68091d10702fcae0d1da73768029fb09efee8e8
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. offload/
  21. openmp/
  22. polly/
  23. pstl/
  24. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-tidy
  29. .git-blame-ignore-revs
  30. .gitattributes
  31. .gitignore
  32. .mailmap
  33. CODE_OF_CONDUCT.md
  34. CONTRIBUTING.md
  35. LICENSE.TXT
  36. pyproject.toml
  37. README.md
  38. 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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