Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -222,6 +222,14 @@
 - Added support for `reduction`-based clauses on `task`-based directives from
   upcoming OpenMP 5.0.
 
+- The LLVM OpenMP runtime `libomp` now supports the OpenMP Tools Interface (OMPT)
+  on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and mac OS. Performance
+  measurements show that the changes result in a slowdown of at most 4 percent
+  in micro-benchmarks. However, if you observe a larger impact on one of your
+  applications, please rebuild the runtime library with `-DLIBOMP_OMPT_SUPPORT=OFF`
+  and file a bug at `LLVM's Bugzilla <https://bugs.llvm.org/` or send a message
+  to the `OpenMP development list <http://lists.llvm.org/cgi-bin/mailman/listinfo/openmp-dev>`.
+
 Internal API Changes
 --------------------