1 /* { dg-do run } */ 2 /* { dg-options "-O2" } */ 3 4 extern void abort (void); 5 struct S { 6 int len; 7 char s[0]; 8 }; main()9int main() 10 { 11 char buf[sizeof (struct S) + 32]; 12 if (__builtin_object_size (((struct S *)&buf[0])->s, 1) != 32) 13 abort (); 14 if (__builtin_object_size (((struct S *)&buf[1])->s, 1) != 31) 15 abort (); 16 if (__builtin_object_size (((struct S *)&buf[64])->s, 0) != 0) 17 abort (); 18 return 0; 19 } 20