/* PR rtl-optimization/28636 */
/* Origin: Andreas Schwab <schwab@suse.de> */

extern void abort(void);

struct input_ty
{
  unsigned char *buffer_position;
  unsigned char *buffer_end;
};

int input_getc_complicated (struct input_ty *x) { return 0; }

int check_header (struct input_ty *deeper)
{
  unsigned len;
  for (len = 0; len < 6; len++)
    if (((deeper)->buffer_position < (deeper)->buffer_end
         ? *((deeper)->buffer_position)++
         : input_getc_complicated((deeper))) < 0)
      return 0;
  return 1;
}

struct input_ty s;
unsigned char b[6];

int main (void)
{
  s.buffer_position = b;
  s.buffer_end = b + sizeof b;
  if (!check_header(&s))
    abort();
  if (s.buffer_position != s.buffer_end)
    abort();
  return 0;
}