--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/concepts/abbrev1.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,12 @@
+// PR c++/64969
+// { dg-do compile { target c++14 } }
+// { dg-additional-options "-fconcepts" }
+
+auto f1(auto x) { return *x; }
+decltype(auto) f2(auto x) { return *x; }
+auto f3(auto x) -> int { return *x; }
+
+int i;
+auto r1 = f1(&i);
+auto r2 = f2(&i);
+auto r3 = f3(&i);