ref: 1325f1ab9f46bda8ff1e110029d5c3fff1d4f9d7 dir: /tests/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; }