re PR c++/87512 (Error: the type ‘const auto’ of ‘constexpr’ variable is not literal)

	PR c++/87512
	* g++.dg/cpp1z/inline-var7.C: New test.

From-SVN: r272512

gcc/testsuite/ChangeLog

+2019-06-20  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/87512
+	* g++.dg/cpp1z/inline-var7.C: New test.
+
 2019-06-20  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/54855

gcc/testsuite/g++.dg/cpp1z/inline-var7.C

+// PR c++/87512
+// { dg-do compile { target c++17 } }
+
+template <int, typename T = int> using enable_if_t = int;
+template<typename T> struct is_pointer { enum { value = 0 }; };
+
+template <typename T>
+inline constexpr auto IsPtr = is_pointer<T>::value;
+
+class Foo;
+class Bar;
+
+template <typename T1, typename T2>
+void foo(T1, T2);
+
+template <typename T>
+enable_if_t<IsPtr<T>> foo(T, Foo);
+
+template <>
+void foo<Bar>(Bar, Bar);