--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/opt/pr83609.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,28 @@
+// PR middle-end/83609
+// { dg-do compile }
+// { dg-options "-O2 -fno-tree-forwprop" }
+
+template <typename> class B;
+template <> struct B<float>
+{
+  float foo () { return __real__ b; }
+  _Complex float b;
+};
+
+void bar (int);
+
+template <class T>
+void
+baz ()
+{
+  B<T> h;
+  T *a = (T *) &h;
+  a[0] = a[1] = 6;
+  h.foo () ? void () : bar (7);
+}
+
+int
+main ()
+{
+  baz<float> ();
+}