--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/torture/pr84803.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+
+long a;
+long *b;
+void c ();
+void d ();
+void
+e (long f)
+{
+  if (a)
+    *b = f;
+}
+void
+g ()
+{
+  c (g, e);
+}
+void
+c (int f, int h ())
+{
+  d (f, h, "");
+}
+void
+d (int f, int h (), char *i, char *k)
+{
+  int j;
+  d (f, h, i + 1, k);
+  while (--j)
+    h (*i);
+}