ref: 9be3c2347c94f2d6a1bd5597a52c03aa02f1c535 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; }