1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-dse1-details" } */
       3  
       4  void f(char *p, int n)
       5  {
       6    for (int i = 0; i < n; ++i)
       7      *p = 0;  /* Removed by DSE.  */
       8    *p = 1;
       9  }
      10  
      11  void g(char *p, int n)
      12  {
      13    int i = 0;
      14    do
      15      *p = 0;  /* Not yet removed by DSE.  */
      16    while (++i < n);
      17    *p = 1;
      18  }
      19  
      20  
      21  /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" { xfail *-*-* } } } */
      22  /* { dg-final { scan-tree-dump-times "Deleted dead store" 1 "dse1" } } */