Index: include/llvm/ADT/IntrusiveRefCntPtr.h
===================================================================
--- include/llvm/ADT/IntrusiveRefCntPtr.h
+++ include/llvm/ADT/IntrusiveRefCntPtr.h
@@ -69,8 +69,9 @@
 /// refcount, respectively.  When a Release() call decrements the refcount to 0,
 /// the object deletes itself.
 ///
-/// Objects that inherit from RefCountedBase should always be allocated with
-/// operator new.
+/// Don't mix ownership semantics for a given object - only use Retain if you
+/// have exclusive ownership of an object created with 'new', or there are
+/// existing Retained ownerships.
 template <class Derived> class RefCountedBase {
   mutable unsigned RefCount = 0;