1  /* Test that the NRV optimization doesn't cause a1 to change too soon.  This
       2     is equivalent to c++/19317.  */
       3  /* { dg-do run } */
       4  
       5  void abort (void);
       6  
       7  struct A
       8  {
       9    int i[100];
      10  };
      11  
      12  struct A a1;
      13  
      14  struct A f ()
      15  {
      16    struct A a2;
      17    a2.i[0] = 42;
      18    /* a1.i[0] should still be 0 until we return. */
      19    if (a1.i[0] != 0)
      20      abort ();
      21    return a2;
      22  }
      23  
      24  int main()
      25  {
      26    a1 = f();
      27    return 0;
      28  }