scc

 1typedef struct s s;
 2
 3struct s {
 4	struct s1 {
 5		int s;
 6		struct s2 {
 7			int s;
 8		} s1;
 9	} s;
10} s2;
11
12#define s s
13
14int
15main(void)
16{
17#undef s
18	goto s;
19	struct s s;
20		{
21			int s;
22			return s;
23		}
24	return s.s.s + s.s.s1.s;
25	s:
26		{
27			return 0;
28		}
29	return 1;
30}