1  /* { dg-do run } */
       2  /* { dg-options "-O -fdump-tree-fre1-details" } */
       3  
       4  int j;
       5  int main ()
       6  {
       7    int i = 1;
       8    int **p;
       9    j = 0;
      10    p = __builtin_malloc (sizeof (int *));
      11    *p = &i;
      12    p = __builtin_realloc (p, 2 * sizeof (int *));
      13    **p = 0;
      14    if (i != 0)
      15      __builtin_abort ();
      16    return j;
      17  }
      18  
      19  /* { dg-final { scan-tree-dump "Replaced j with 0" "fre1" } } */