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/* { dg-do run } */
/* { dg-options "-O2" } */
 
extern void abort (void);
struct S {
    int len;
    char s[0];
};
int main()
{
  char buf[sizeof (struct S) + 32];
  if (__builtin_object_size (((struct S *)&buf[0])->s, 1) != 32)
    abort ();
  if (__builtin_object_size (((struct S *)&buf[1])->s, 1) != 31)
    abort ();
  if (__builtin_object_size (((struct S *)&buf[64])->s, 0) != 0)
    abort ();
  return 0;
}