1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-dse1-details" } */
       3  
       4  struct A { char c[4]; } a, b;
       5  
       6  void
       7  f1 (void)
       8  {
       9    a.c[2] = '\0';
      10    __builtin_memset (&a.c[1], 1, 2);
      11  }
      12  
      13  void
      14  f2 (void)
      15  {
      16    __builtin_memcpy (&a.c[0], "a", 1);
      17    __builtin_memcpy (&a, &b, 3);
      18  }
      19  
      20  /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" } } */