1  /* Test for bitfield alignment in structs and unions.  */
       2  /* { dg-do run { target pcc_bitfield_type_matters } }  */
       3  /* { dg-options "-O2" }  */
       4  
       5  extern void abort (void);
       6  extern void exit (int);
       7  
       8  typedef long la __attribute__((aligned (8)));
       9  
      10  struct A
      11  {
      12    char a;
      13    union UA
      14    {
      15      char x;
      16      la y : 6;
      17    } b;
      18    char c;
      19  } a;
      20  
      21  struct B
      22  {
      23    char a;
      24    union UB
      25    {
      26      char x;
      27      long y : 6 __attribute__((aligned (8)));
      28    } b;
      29    char c;
      30  } b;
      31  
      32  struct C
      33  {
      34    char a;
      35    struct UC
      36    {
      37      la y : 6;
      38    } b;
      39    char c;
      40  } c;
      41  
      42  struct D
      43  {
      44    char a;
      45    struct UD
      46    {
      47      long y : 6 __attribute__((aligned (8)));
      48    } b;
      49    char c;
      50  } d;
      51  
      52  int main (void)
      53  {
      54    if (sizeof (a) != sizeof (b))
      55      abort ();
      56    if (sizeof (a) != sizeof (c))
      57      abort ();
      58    if (sizeof (a) != sizeof (d))
      59      abort ();
      60    if ((&a.c - &a.a) != (&b.c - &b.a))
      61      abort ();
      62    if ((&a.c - &a.a) != (&c.c - &c.a))
      63      abort ();
      64    if ((&a.c - &a.a) != (&d.c - &d.a))
      65      abort ();
      66    exit (0);
      67  }