1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-dse1-details" } */
       3  
       4  void f(int n)
       5  {
       6    char *p = __builtin_malloc (1);
       7    int i;
       8    do
       9      *p = 0;
      10    while (++i < n);
      11  }
      12  
      13  /* { dg-final { scan-tree-dump-times "Deleted dead store" 1 "dse1" } } */