diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index a12aaa29fc4..88c1c05e1af 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -50,6 +50,10 @@ Non-comprehensive list of changes in this release
   APFloat::isIEEENormal() was renamed to APFloat::isNormal(). This ensures that
   APFloat::isNormal() conforms to IEEE-754R-2008.
 
+* The library call simplification pass has been removed.  Its functionality
+  has been integrated into the instruction combiner and function attribute
+  marking passes.
+
 * ... next change ...
 
 .. NOTE