[all-commits] [llvm/llvm-project] 21ee27: [Clang] Issue an error when an atomic builtin is c...

[Hendrik Hübner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 21ee27877a87185199d150f9a49f2d3337bad86e
      https://github.com/llvm/llvm-project/commit/21ee27877a87185199d150f9a49f2d3337bad86e
  Author: Hendrik Hübner <117831077+HendrikHuebner at users.noreply.github.com>
  Date:   2024-05-27 (Mon, 27 May 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/lib/Sema/SemaChecking.cpp
    M clang/test/Sema/atomic-ops.c

  Log Message:
  -----------
  [Clang] Issue an error when an atomic builtin is called with a pointer to a zero-size object (#91057)

When an atomic builtin is called with a pointer to an object of size
zero, an arithmetic exception gets thrown because there is a modulo
operation with the objects size in codegen.

Diagnose this in sema instead.

Fixes #90330.



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