1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -m64 -fdump-tree-optimized" } */
       3  
       4  __int128 foo(long long a, long long b)
       5  {
       6     return (__int128)a * (__int128)b;
       7  }
       8  
       9  /* { dg-final { scan-tree-dump " w\\* " "optimized" } } */