Add IRGen support for return statements in functions with reference 
type.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72459 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/references.cpp b/test/CodeGenCXX/references.cpp
index e5db446..5c5518b 100644
--- a/test/CodeGenCXX/references.cpp
+++ b/test/CodeGenCXX/references.cpp
@@ -75,3 +75,6 @@
   aggregate_reference_return().a = 10;
 }
 
+int& reference_return() {
+  return g;
+}