1  /* { dg-do compile } */
       2  /* { dg-options "-O -fstrict-aliasing -fdump-tree-optimized" } */
       3  
       4  struct A
       5  {
       6    int i;
       7  };
       8  struct B
       9  {
      10    struct A a;
      11    int j;
      12  };
      13  
      14  int foo (struct A *p, struct B *q)
      15  {
      16    p->i = 0;
      17    q->j = 1;
      18    return p->i;
      19  }
      20  
      21  /* { dg-final { scan-tree-dump "return 0;" "optimized" } } */