ref: 1e1f75a7e9d7df35f4999c0ad3913ed61a92678b dir: /tests/execute/0018-structptr.c/
int main() { struct S { int x; int y; } s; struct S *p; p = &s; s.x = 1; p->y = 2; return p->y + p->x - 3; }