1  /* { dg-do run } */
       2  /* { dg-options "-O2" } */
       3  
       4  #include "builtin-object-size-common.h"
       5  
       6  struct S {
       7      int len;
       8      char s[0];
       9  };
      10  int main()
      11  {
      12    char buf[sizeof (struct S) + 32];
      13    if (__builtin_object_size (((struct S *)&buf[0])->s, 1) != 32)
      14      FAIL ();
      15    if (__builtin_object_size (((struct S *)&buf[1])->s, 1) != 31)
      16      FAIL ();
      17    if (__builtin_object_size (((struct S *)&buf[64])->s, 0) != 0)
      18      FAIL ();
      19  
      20    DONE ();
      21  }