ref: a0e34a8b86c340b8b3517c6dbdcde1de8c8ca39a 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; }