1  /* PR c/43981 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-Wunused" } */
       4  /* { dg-require-effective-target alloca } */
       5  
       6  void g (char *);
       7  
       8  char
       9  f (int a)
      10  {
      11    int len = a * 3;
      12    char t[len];
      13  
      14    g (t);
      15    return t[0];
      16  }