ref: c1b4b8354a76cc8c9aa13757e8b3db8d1b5a7c39 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; }