ref: 92527b4272eb9d8ff6c074a3e4c3c3515cc6d2f5 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; }