1  /* { dg-do compile } */
       2  /* { dg-options "-O2" } */
       3  
       4  int main ()
       5  {
       6    int i;
       7    foobar (i, &i); /* { dg-warning "implicit declaration" } */
       8  }
       9  
      10  int foobar (int a, long long b)
      11  {
      12    int c;
      13  
      14    c = a % b;
      15    a = a / b;
      16    return a + b;
      17  }