Warn about self-initialization of references.

Initializing a reference with itself, e.g. "int &a = a;" seems like a
very bad idea.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162093 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/stack-addr-ps.cpp b/test/Analysis/stack-addr-ps.cpp
index b21a03d..cbdb143 100644
--- a/test/Analysis/stack-addr-ps.cpp
+++ b/test/Analysis/stack-addr-ps.cpp
@@ -87,6 +87,6 @@
 
 // rdar://11345441
 int* f5() {
-  int& i = i; // expected-warning {{Assigned value is garbage or undefined}} expected-note {{binding reference variable 'i' here}}
+  int& i = i; // expected-warning {{Assigned value is garbage or undefined}} expected-note {{binding reference variable 'i' here}} expected-warning{{variable 'i' is uninitialized when used within its own initialization}}
   return &i; // expected-warning {{address of stack memory associated with local variable 'i' returned}}
 }