[libcxx-commits] [clang] [libcxx] [clang] [libc++] fix _Atomic c11 compare exchange does not update expected results (PR #78707)

[via libcxx-commits]

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@@ -0,0 +1,70 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// https://github.com/llvm/llvm-project/issues/30023
+// compare exchange does not work with types of which the size is not a power of 2
+
+// XFAIL: clang-20, clang-21, apple-clang-15, apple-clang-16, apple-clang-17
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huixie90 wrote:

Discussed with @ldionne offline. We agreed to `UNSUPPORTED: clang-22` as suggested with a TODO. once libc++'s CI's docker image is updated with clang with this patch, we can re-enable the test

https://github.com/llvm/llvm-project/pull/78707