1  /* PR tree-optimization/93582 */
       2  /* { dg-do compile { target lp64 } } */
       3  /* { dg-options "-O2 -fdump-tree-fre1" } */
       4  /* { dg-final { scan-tree-dump "return 9223372036854775806;" "fre1" } } */
       5  
       6  union U { struct A { unsigned long long a : 1, b : 62, c : 1; } a; unsigned long long i; };
       7  
       8  unsigned long long
       9  foo (char *p)
      10  {
      11    __builtin_memset (p - 0xfffffffffffffffULL, 0, 0xffffffffffffffeULL);
      12    __builtin_memset (p + 1, 0, 0xffffffffffffffeULL);
      13    union U *q = (union U *) (void *) (p - 4);
      14    q->a.b = -1;
      15    return q->i;
      16  }