gcc/testsuite/gcc.dg/builtin-object-size-12.c

   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 }