[Release Notes] Add release note for "-fmerge-all-constants"

m-gupta · m-gupta · commit 431d8c39ba74 · 2018-04-06T21:11:09.000Z
Summary: Add note that "-fmerge-all-constants" is not applied as default anymore. Reviewers: rjmccall, rsmith, chandlerc Subscribers: llvm-commits, thakis Differential Revision: https://reviews.llvm.org/D45388 llvm-svn: 329457
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
@@ -58,6 +58,9 @@ Non-comprehensive list of changes in this release
   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
