1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-fre1" } */
       3  
       4  int i;
       5  int foo (int b)
       6  {
       7    int j;
       8    i = 1;
       9    if (b)
      10      j = i;
      11    return i - j;
      12  }
      13  
      14  /* { dg-final { scan-tree-dump "return 0;" "fre1" } } */