ref: 4b0f334f7eca8920c3b91ba1ab68d0ebaec0cce0 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; }