ref: 0b360327c6f4f4c79d8872c4b2dc486aba378f6d dir: /tests/cc/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; }