Add a blurb about the new ExecutionDepsFix pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145220 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index e987172..e3b3bae 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -941,7 +941,10 @@
 <li>The code generator now supports vector "select" operations on vector
     comparisons, turning them into various optimized code sequences (e.g.
     using the SSE4/AVX "blend" instructions).</li>
-<li>XXX: Domain fixing pass is now target independent (ExecutionDepsFix pass). (Jakob)</li>
+<li>The SSE execution domain fix pass and the ARM NEON move fix pass have been
+    merged to a target independent execution dependency fix pass.  Targets can
+    override the <code>getExecutionDomain</code> and
+    <code>setExecutionDomain</code> hooks to use it.</li>
 </ul>
 </div>