1  /* PR tree-optimization/47391 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -fdump-tree-optimized" } */
       4  
       5  const volatile int v = 1;
       6  int i = 0;
       7  
       8  void
       9  foo (void)
      10  {
      11    i = v;
      12  }
      13  
      14  int
      15  main (void)
      16  {
      17    foo ();
      18    return 0;
      19  }
      20  
      21  /* { dg-final { scan-tree-dump-not "i = 1;" "optimized" } } */