--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp1y/builtin_FUNCTION.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,42 @@
+// { dg-do run }
+
+#include <string.h>
+
+const char *ct, *dt, *cv;
+
+struct KLASS
+{
+  KLASS () ;
+  ~KLASS ();
+  operator int ();
+};
+
+KLASS::KLASS()
+{
+  ct = __builtin_FUNCTION ();
+}
+
+KLASS::~KLASS ()
+{
+  dt = __builtin_FUNCTION ();
+}
+
+KLASS::operator int ()
+{
+  cv = __builtin_FUNCTION ();
+  return 0;
+}
+
+int main ()
+{
+  int q = int (KLASS ());
+
+  if (strcmp (ct, "KLASS"))
+    return 1;
+  if (strcmp (dt, "~KLASS"))
+    return 2;
+  if (strcmp (cv, "operator int"))
+    return 3;
+
+  return 0;
+}