1  /* PR tree-optimization/55920 */
       2  
       3  struct A { unsigned a; } __attribute__((packed));
       4  struct B { int b; unsigned char c[16]; };
       5  void bar (struct A);
       6  
       7  void
       8  foo (struct B *x)
       9  {
      10    struct A a;
      11    if (x->b)
      12      __builtin_memcpy (&a, x->c, sizeof a);
      13    else
      14      a.a = 0;
      15    bar (a);
      16  }