1  /* PR c++/34459 */
       2  
       3  extern void abort (void);
       4  extern void *memset (void *s, int c, __SIZE_TYPE__ n);
       5  
       6  struct S
       7  {
       8    char s[25];
       9  };
      10  
      11  struct S *p;
      12  
      13  void __attribute__((noinline,noclone))
      14  foo (struct S *x, int set)
      15  {
      16    int i;
      17    for (i = 0; i < sizeof (x->s); ++i)
      18      if (x->s[i] != 0)
      19        abort ();
      20      else if (set)
      21        x->s[i] = set;
      22    p = x;
      23  }
      24  
      25  void __attribute__((noinline,noclone))
      26  test1 (void)
      27  {
      28    struct S a;
      29    memset (&a.s, '\0', sizeof (a.s));
      30    foo (&a, 0);
      31    struct S b = a;
      32    foo (&b, 1);
      33    b = a;
      34    b = b;
      35    foo (&b, 0);
      36  }
      37  
      38  void __attribute__((noinline,noclone))
      39  test2 (void)
      40  {
      41    struct S a;
      42    memset (&a.s, '\0', sizeof (a.s));
      43    foo (&a, 0);
      44    struct S b = a;
      45    foo (&b, 1);
      46    b = a;
      47    b = *p;
      48    foo (&b, 0);
      49  }
      50  
      51  void __attribute__((noinline,noclone))
      52  test3 (void)
      53  {
      54    struct S a;
      55    memset (&a.s, '\0', sizeof (a.s));
      56    foo (&a, 0);
      57    struct S b = a;
      58    foo (&b, 1);
      59    *p = a;
      60    *p = b;
      61    foo (&b, 0);
      62  }
      63  
      64  int
      65  main (void)
      66  {
      67    test1 ();
      68    test2 ();
      69    test3 ();
      70    return 0;
      71  }