[Clang][Doc] Update the release note for clang

Add the support for `atomic compare` and `atomic compare capture` in the
release note of clang.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D129211

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 74505dd..84c7433 100644 (file)
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -592,6 +592,8 @@ ABI Changes in Clang
 
 OpenMP Support in Clang
 -----------------------
+* Added the support for ``atomic compare`` and ``atomic compare capture``
+  (``-fopenmp-version=51`` is required).
 
 ...