1 /* PR rtl-optimization/28636 */
2 /* Origin: Andreas Schwab <schwab@suse.de> */
3 
4 extern void abort(void);
5 
6 struct input_ty
7 {
8   unsigned char *buffer_position;
9   unsigned char *buffer_end;
10 };
11 
input_getc_complicated(struct input_ty * x)12 int input_getc_complicated (struct input_ty *x) { return 0; }
13 
check_header(struct input_ty * deeper)14 int check_header (struct input_ty *deeper)
15 {
16   unsigned len;
17   for (len = 0; len < 6; len++)
18     if (((deeper)->buffer_position < (deeper)->buffer_end
19          ? *((deeper)->buffer_position)++
20          : input_getc_complicated((deeper))) < 0)
21       return 0;
22   return 1;
23 }
24 
25 struct input_ty s;
26 unsigned char b[6];
27 
main(void)28 int main (void)
29 {
30   s.buffer_position = b;
31   s.buffer_end = b + sizeof b;
32   if (!check_header(&s))
33     abort();
34   if (s.buffer_position != s.buffer_end)
35     abort();
36   return 0;
37 }
38