Index: llvm/trunk/docs/ReleaseNotes.rst
===================================================================
--- llvm/trunk/docs/ReleaseNotes.rst
+++ llvm/trunk/docs/ReleaseNotes.rst
@@ -88,6 +88,21 @@
   ``llvm/Config/llvm-config.h``.  If you used this macro, use the compiler-set
   ``_WIN32`` instead which is set exactly when ``LLVM_ON_WIN32`` used to be set.
 
+* The ``DEBUG`` macro has been renamed to ``LLVM_DEBUG``. The interface remains
+  the same.  If you used this macro you need to migrate to the new one, you can
+  do this with the following bash command:
+
+.. code-block:: bash
+
+    git grep -l 'DEBUG' | xargs perl -pi -e 's/\bDEBUG\s?\(/LLVM_DEBUG(/g'
+
+  Additionally, you can clang-format your code to make it easier to integrate
+  future changes locally.  This can be done with the following bash command:
+
+.. code-block:: bash
+
+    git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM
+
 * Note..
 
 .. NOTE