1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-ccp1" } */
       3  
       4  int foo (int i)
       5  {
       6    int j = i;
       7    int k = 0;
       8    int l = j + k;
       9    int m = l - j;
      10    return m;
      11  }
      12  
      13  /* { dg-final { scan-tree-dump "return 0;" "ccp1" } } */