[all-commits] [llvm/llvm-project] 66f4a1: [C23] Use thread_local semantics (#70107)

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 66f4a1399d7de3d38312a5b251d4f8acd75237ca
      https://github.com/llvm/llvm-project/commit/66f4a1399d7de3d38312a5b251d4f8acd75237ca
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2023-10-25 (Wed, 25 Oct 2023)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Parse/ParseDecl.cpp
    A clang/test/CodeGen/thread_local.c
    A clang/test/Sema/thread_local.c

  Log Message:
  -----------
  [C23] Use thread_local semantics (#70107)

When implementing thread_local as a keyword in C23, we accidentally
started using C++11 thread_local semantics when using that keyword
instead of using C11 _Thread_local semantics.

This oversight is fixed by pretending the user wrote _Thread_local
instead. This doesn't have the best behavior in terms of diagnostics,
but it does correct the semantic behavior.

Fixes https://github.com/llvm/llvm-project/issues/70068
Fixes https://github.com/llvm/llvm-project/issues/69167