1  /* PR tree-optimization/39343 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O2" } */
       4  
       5  extern void abort (void);
       6  
       7  extern inline __attribute__ ((__always_inline__)) int
       8  foo (char *dest)
       9  {
      10    return __builtin_object_size (dest, 1);
      11  }
      12  
      13  struct S
      14  {
      15    union
      16    {
      17      struct { int a, b; char c, d; } f;
      18      struct { struct { int a, b; char c, d[255]; } e; } g;
      19    } u;
      20  };
      21  
      22  int
      23  main (void)
      24  {
      25    struct S s;
      26    if (foo (s.u.g.e.d) != 255)
      27      abort ();
      28    return 0;
      29  }