[all-commits] [llvm/llvm-project] 2c923b: [clang-cl] Expose the /volatile:{iso, ms} choice vi...

[David Majnemer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2c923b88631cda41cbddf58a13ccfb5c04a2fc3c
      https://github.com/llvm/llvm-project/commit/2c923b88631cda41cbddf58a13ccfb5c04a2fc3c
  Author: David Majnemer <david.majnemer at gmail.com>
  Date:   2022-08-23 (Tue, 23 Aug 2022)

  Changed paths:
    M clang/include/clang/Basic/CodeGenOptions.def
    M clang/include/clang/Basic/LangOptions.def
    M clang/include/clang/Driver/Options.td
    M clang/lib/Basic/Targets/OSTargets.cpp
    M clang/lib/CodeGen/CGAtomic.cpp
    M clang/test/Preprocessor/predefined-win-macros.c

  Log Message:
  -----------
  [clang-cl] Expose the /volatile:{iso,ms} choice via _ISO_VOLATILE

MSVC allows interpreting volatile loads and stores, when combined with
/volatile:iso, as having acquire/release semantics. MSVC also exposes a
define, _ISO_VOLATILE, which allows users to enquire if this feature is
enabled or disabled.