New test.

From-SVN: r19587

gcc/testsuite/gcc.c-torture/execute/980506-1.c

+struct decision
+{
+  char enforce_mode;             
+  struct decision *next;         
+};
+
+
+static void
+clear_modes (p)
+     register struct decision *p;
+{
+  goto blah;
+
+foo:
+  p->enforce_mode = 0;
+blah:
+  if (p)
+    goto foo;
+}
+
+main()
+{
+  struct decision *p = 0;
+  clear_modes (p);
+  exit (0);
+}