gcc/testsuite/gcc.c-torture/execute/pr45070.c

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