--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/decltype12.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,37 @@
+// { dg-do compile { target c++11 } }
+template<typename T, typename U>
+struct is_same
+{
+  static const bool value = false;
+};
+
+template<typename T>
+struct is_same<T, T>
+{
+  static const bool value = true;
+};
+
+int&& f(const int&) {}
+int&& (*fp)(const int&) = f;
+int&& (&fr)(const int&) = f;
+
+struct X { int&& f(const int&); };
+
+int&& (X::*mfp)(const int&) = &X::f;
+
+void g(X& xr, X* xp)
+{
+  int i;
+  static_assert(is_same<decltype(f(i)), int&&>::value, "direct call");
+  static_assert(is_same<decltype(fp(i)), int&&>::value, "pointer");
+  static_assert(is_same<decltype((*fp)(i)), int&&>::value, 
+                "dereferenced pointer");
+  static_assert(is_same<decltype(fr(i)), int&&>::value, 
+                "reference");
+  static_assert(is_same<decltype(xr.f(i)), int&&>::value,
+                "member function call");
+  static_assert(is_same<decltype((xr.*mfp)(i)), int&&>::value, 
+                "member function pointer with .*");
+  static_assert(is_same<decltype((xp->*mfp)(i)), int&&>::value, 
+                "member function pointer with ->*");
+}