Add a blurb about the attributes changes to the release notes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175075 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 67de9458ebb8cf5ec38223d330e97b01bb1d7f27..2142162ce58a43468aa3f4b2375e758a28788a33 100644 (file)
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -59,6 +59,11 @@ Non-comprehensive list of changes in this release
 
 * We've improved the X86 and ARM cost model.
 
+* The Attributes classes have been completely rewritten and expanded. They now
+  support not only enumerated attributes and alignments, but "string"
+  attributes, which are useful for passing information to code generation. See
+  `How To Use Attributes <HowToUseAttributes.html>`_ for more details.
+
 * ... next change ...
 
 .. NOTE