[clang][ssaf] Add SARIF transformation-report format (#208327)

Adds the built-in `TransformationReportFormat`, registered under the
file extension `sarif`. The writer drives clang's existing
`SarifDocumentWriter` (`clang/Basic/Sarif.h`) to produce a SARIF 2.1.0
JSON document. The tool driver name is `clang-ssaf`; the long `fullName`
carries the transformation's name.

Token-range `CharSourceRange`s are canonicalized to char ranges via
`clang::Lexer::getAsCharRange` before being attached to results; invalid
ranges (including default-constructed ones) are treated as "no location"
— the writer omits the result's `locations` key rather than fabricating
one. Source edits are not embedded in the report; the writer never emits
a `fix` or `fixes` key.

Anchored via `SSAFSARIFTransformationReportFormatAnchorSource` so static
builds keep the registration.

Assisted-By: Claude Opus 4.7
5 files changed
tree: 1adfed1fe07a04b1af1b93a814dd750d918b013b
  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

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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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