1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  /* { dg-final { scan-tree-dump-not " >= 0\\)" "optimized" } } */
       4  int f(int a, int *b, int *d)
       5  {
       6    int c = __builtin_clz(a);
       7  
       8    *b = c;
       9  
      10    if (c != 0)
      11      *d = c;
      12  
      13    return c;
      14  }