1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-optimized -Wno-psabi" } */
       3  
       4  typedef int v4si __attribute__((vector_size(16)));
       5  
       6  int f(v4si t)
       7  {
       8    union {
       9        v4si t1;
      10        int t2[4];
      11    } u;
      12    u.t1 = t;
      13    return u.t2[1];
      14  }
      15  
      16  /* { dg-final { scan-tree-dump-not "u;" "optimized" } } */
      17  /* { dg-final { scan-tree-dump-times "BIT_FIELD_REF" 1 "optimized" } } */