--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/ref-qual19.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,117 @@
+// PR c++/87109
+// { dg-do run { target c++11 } }
+
+#include <utility>
+
+struct C { int i; };
+struct D { int i; };
+
+struct A {
+  int j;
+  operator C() & { return { 1 }; }
+  operator C() && { return { 2 }; }
+};
+
+struct B : public A {
+  operator D() & { return { 3 }; }
+  operator D() && { return { 4 }; }
+};
+
+C
+f (A a)
+{
+  return a;
+}
+
+C
+f2 (A a)
+{
+  return std::move (a);
+}
+
+C
+f3 ()
+{
+  A a;
+  return a;
+}
+
+C
+f4 ()
+{
+  A a;
+  return std::move (a);
+}
+
+C
+f5 ()
+{
+  return A();
+}
+
+D
+f6 (B b)
+{
+  return b;
+}
+
+D
+f7 (B b)
+{
+  return std::move (b);
+}
+
+D
+f8 ()
+{
+  B b;
+  return b;
+}
+
+D
+f9 ()
+{
+  B b;
+  return std::move (b);
+}
+
+D
+f10 ()
+{
+  return B();
+}
+
+int
+main ()
+{
+  C c1 = f (A());
+  if (c1.i != 2)
+    __builtin_abort ();
+  C c2 = f2 (A());
+  if (c2.i != 2)
+    __builtin_abort ();
+  C c3 = f3 ();
+  if (c3.i != 2)
+    __builtin_abort ();
+  C c4 = f4 ();
+  if (c4.i != 2)
+    __builtin_abort ();
+  C c5 = f5 ();
+  if (c5.i != 2)
+    __builtin_abort ();
+  D c6 = f6 (B());
+  if (c6.i != 4)
+    __builtin_abort ();
+  D c7 = f7 (B());
+  if (c7.i != 4)
+    __builtin_abort ();
+  D c8 = f8 ();
+  if (c8.i != 4)
+    __builtin_abort ();
+  D c9 = f9 ();
+  if (c9.i != 4)
+    __builtin_abort ();
+  D c10 = f10 ();
+  if (c10.i != 4)
+    __builtin_abort ();
+}