ref: 1ee8ce7474148da51b4b0bfc8e1e1a87c00ed04e 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; }