[all-commits] [llvm/llvm-project] 300d40: [Clang] Implement the core language parts of P2786...

[cor3ntin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 300d4026f77683aae490361d250a51904dd19ed2
      https://github.com/llvm/llvm-project/commit/300d4026f77683aae490361d250a51904dd19ed2
  Author: cor3ntin <corentinjabot at gmail.com>
  Date:   2025-05-06 (Tue, 06 May 2025)

  Changed paths:
    M clang/docs/LanguageExtensions.rst
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/AST/ASTContext.h
    M clang/include/clang/AST/DeclCXX.h
    M clang/include/clang/AST/Type.h
    M clang/include/clang/Basic/Attr.td
    M clang/include/clang/Basic/Builtins.td
    M clang/include/clang/Basic/DiagnosticParseKinds.td
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Basic/TokenKinds.def
    M clang/include/clang/Parse/Parser.h
    M clang/include/clang/Sema/Sema.h
    M clang/lib/AST/ASTContext.cpp
    M clang/lib/AST/Decl.cpp
    M clang/lib/AST/DeclCXX.cpp
    M clang/lib/AST/Type.cpp
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/Frontend/InitPreprocessor.cpp
    M clang/lib/Parse/ParseDeclCXX.cpp
    M clang/lib/Parse/Parser.cpp
    M clang/lib/Sema/SemaChecking.cpp
    M clang/lib/Sema/SemaDecl.cpp
    M clang/lib/Sema/SemaDeclCXX.cpp
    M clang/lib/Sema/SemaExprCXX.cpp
    A clang/test/CodeGenCXX/cxx2c-trivially-relocatable.cpp
    A clang/test/Parser/cxx2c-trivially-relocatable.cpp
    M clang/test/SemaCXX/attr-trivial-abi.cpp
    A clang/test/SemaCXX/cxx2c-trivially-relocatable.cpp
    M clang/test/SemaCXX/ptrauth-triviality.cpp
    M clang/www/cxx_status.html

  Log Message:
  -----------
  [Clang] Implement the core language parts of P2786 - Trivial relocation (#127636)

This adds

- The parsing of `trivially_relocatable_if_eligible`,
`replaceable_if_eligible` keywords
- `__builtin_trivially_relocate`, implemented in terms of memmove. In
the future this should
- Add the appropriate start/end lifetime markers that llvm does not have
(`start_lifetime_as`)
     - Add support for ptrauth when that's upstreamed

- the `__builtin_is_cpp_trivially_relocatable` and
`__builtin_is_replaceable` traits


Fixes #127609



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