Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -58,6 +58,9 @@
   information available in LLVM to statically predict the performance of
   machine code for a specific CPU.
 
+* The optimization flag to merge constants (-fmerge-all-constants) is no longer
+  applied by default.
+
 * Note..
 
 .. NOTE