1struct rtx_def
2{
3  int code;
4};
5
6main()
7{
8  int tmp[2];
9  struct rtx_def *r, s;
10  int *p, *q;
11
12  /* The alias analyzer was creating the same memory tag for r, p and q
13     because 'struct rtx_def *' is type-compatible with 'int *'.  However,
14     the alias set of 'int[2]' is not the same as 'int *', so variable
15     'tmp' was deemed not aliased with anything.  */
16  r = &s;
17  r->code = 39;
18
19  /* If 'r' wasn't declared, then q and tmp would have had the same memory
20     tag.  */
21  p = tmp;
22  q = p + 1;
23  *q = 0;
24  tmp[1] = 39;
25  if (*q != 39)
26    abort ();
27  exit (0);
28}
29