1  /* PR middle-end/57748 */
       2  /* { dg-do run } */
       3  /* wrong code in expand_assignment:
       4     misalignp == true, !MEM_P (to_rtx),
       5     offset == 0, bitpos >= GET_MODE_PRECISION,
       6     => result = NULL.  */
       7  
       8  #include <stdlib.h>
       9  
      10  extern void abort (void);
      11  
      12  typedef long long V
      13    __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
      14  
      15  typedef struct S { V a; V b[0]; } P __attribute__((aligned (1)));
      16  
      17  struct __attribute__((packed)) T { char c; P s; };
      18  
      19  void __attribute__((noinline, noclone))
      20  check (struct T *t)
      21  {
      22    if (t->s.b[0][0] != 3 || t->s.b[0][1] != 4)
      23      abort ();
      24  }
      25  
      26  void __attribute__((noinline, noclone))
      27  foo (P *p)
      28  {
      29    V a = { 3, 4 };
      30    p->b[0] = a;
      31  }
      32  
      33  int
      34  main ()
      35  {
      36    struct T *t = (struct T *) calloc (128, 1);
      37  
      38    foo (&t->s);
      39    check (t);
      40  
      41    free (t);
      42    return 0;
      43  }