Mention SystemZ in the release notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181328 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 06918d4..3689af1 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -140,6 +140,13 @@
graphics / compute drivers which are developed as part of the `Mesa3D
<http://www.mesa3d.org>`_ project.
+SystemZ/s390x Backend
+---------------------
+
+LLVM and clang now support IBM's z/Architecture. At present this support
+is restricted to GNU/Linux (GNU triplet s390x-linux-gnu) and requires
+z10 or greater.
+
External Open Source Projects Using LLVM 3.3
============================================