1  /* PR45070 */
       2  extern void abort(void);
       3  
       4  struct packed_ushort {
       5      unsigned short ucs;
       6  } __attribute__((packed));
       7  
       8  struct source {
       9      int pos, length;
      10  };
      11  
      12  static int flag;
      13  
      14  static void __attribute__((noinline)) fetch(struct source *p)
      15  {
      16      p->length = 128;
      17  }
      18      
      19  static struct packed_ushort __attribute__((noinline)) next(struct source *p)
      20  {
      21      struct packed_ushort rv;
      22  
      23      if (p->pos >= p->length) {
      24  	if (flag) {
      25  	    flag = 0;
      26  	    fetch(p);
      27  	    return next(p);
      28  	}
      29  	flag = 1;
      30  	rv.ucs = 0xffff;
      31  	return rv;
      32      }
      33      rv.ucs = 0;
      34      return rv;
      35  }
      36  
      37  int main(void)
      38  {
      39      struct source s;
      40      int i;
      41  
      42      s.pos = 0;
      43      s.length = 0;
      44      flag = 0;
      45  
      46      for (i = 0; i < 16; i++) {
      47  	struct packed_ushort rv = next(&s);
      48  	if ((i == 0 && rv.ucs != 0xffff)
      49  	    || (i > 0 && rv.ucs != 0))
      50  	    abort();
      51      }
      52      return 0;
      53  }