1  /* { dg-do run } */
       2  /* { dg-options "-fno-strict-aliasing" } */
       3  /* { dg-skip-if "unaligned access" { arc*-*-* epiphany-*-* nds32*-*-* sparc*-*-* sh*-*-* tic6x-*-* } } */
       4  
       5  extern void abort (void);
       6  #if (__SIZEOF_INT__ <= 2)
       7  struct X {
       8    unsigned char pad : 4;
       9    unsigned int a : 16;
      10    unsigned int b : 8;
      11    unsigned int c : 6;
      12  } __attribute__((packed));
      13  #else
      14  struct X {
      15    unsigned char pad : 4;
      16    unsigned int a : 32;
      17    unsigned int b : 24;
      18    unsigned int c : 6;
      19  } __attribute__((packed));
      20  
      21  #endif
      22  
      23  
      24  int main (void)
      25  {
      26    struct X x;
      27    unsigned int bad_bits;
      28  
      29    x.pad = -1;
      30    x.a = -1;
      31    x.b = -1;
      32    x.c = -1;
      33  
      34    bad_bits = ((unsigned int)-1) ^ *(1+(unsigned int *) &x);
      35    if (bad_bits != 0)
      36      abort ();
      37    return 0;
      38  }
      39