ref: a9d67e014c29b320aeebc0b1e8bdf377cd9f5c0d 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; }