gcc/testsuite/gcc.dg/builtin-object-size-15.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 extern void abort (void);
   5
   6 int
   7 main ()
   8 {
   9   struct A { char buf1[9]; char buf2[1]; } a;
  10
  11   if (__builtin_object_size (a.buf1 + (0 + 4), 1) != 5)
  12     abort ();
  13   char *p = a.buf1;
  14   p += 1;
  15   p += 3;
  16   if (__builtin_object_size (p, 1) != 5)
  17     abort ();
  18   p = (char *) &a;
  19   char *q = p + 1;
  20   char *r = q + 3;
  21   char *t = r;
  22   if (r != (char *) &a + 4)
  23     t = (char *) &a + 1;
  24   if (__builtin_object_size (t, 1) != 6)
  25     abort ();
  26   return 0;
  27 }