ref: 840c98a16e5c6ce962d3a7d4c01c27a51dad2e23 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; }