Fix regression I introduced when dynamic_cast-ing to a reference type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/dynamic-cast.cpp b/test/CodeGenCXX/dynamic-cast.cpp
new file mode 100644
index 0000000..aeb2a64
--- /dev/null
+++ b/test/CodeGenCXX/dynamic-cast.cpp
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 %s -emit-llvm-only
+
+struct A { virtual void f(); };
+struct B : A { };
+
+const B& f(A *a) {
+  return dynamic_cast<const B&>(*a);
+}