Update aosp/master Clang for rebase to r222490.
Change-Id: Ic557ac55e97fbf6ee08771c7b7c3594777b0aefd
diff --git a/docs/AttributeReference.rst b/docs/AttributeReference.rst
index c12f6d8..115a217 100644
--- a/docs/AttributeReference.rst
+++ b/docs/AttributeReference.rst
@@ -236,6 +236,11 @@
"X","","",""
+.. Note:: Some features of this attribute are experimental. The meaning of
+ multiple enable_if attributes on a single declaration is subject to change in
+ a future version of clang. Also, the ABI is not standardized and the name
+ mangling may change in future versions. To avoid that, use asm labels.
+
The ``enable_if`` attribute can be placed on function declarations to control
which overload is selected based on the values of the function's arguments.
When combined with the ``overloadable`` attribute, this feature is also