1  /* { dg-do compile } */
       2  /* { dg-options "-O3 -fdump-tree-optimized" } */
       3  
       4  int foo(int a)
       5  {
       6    int t;
       7    *(volatile int *)&t = a;
       8  }
       9  
      10  /* { dg-final { scan-tree-dump "={v}" "optimized" } } */