1  /* PR tree-optimization/86492 */
       2  
       3  union U
       4  {
       5    unsigned int r;
       6    struct S
       7    {
       8      unsigned int a:12;
       9      unsigned int b:4;
      10      unsigned int c:16;
      11    } f;
      12  };
      13  
      14  __attribute__((noipa)) unsigned int
      15  foo (unsigned int x)
      16  {
      17    union U u;
      18    u.r = 0;
      19    u.f.c = x;
      20    u.f.b = 0xe;
      21    return u.r;
      22  }
      23  
      24  int
      25  main ()
      26  {
      27    union U u;
      28    if (__CHAR_BIT__ * __SIZEOF_INT__ != 32 || sizeof (u.r) != sizeof (u.f))
      29      return 0;
      30    u.r = foo (0x72);
      31    if (u.f.a != 0 || u.f.b != 0xe || u.f.c != 0x72)
      32      __builtin_abort ();
      33    return 0;
      34  }