gcc/testsuite/c-c++-common/torture/builtin-clear-padding-5.c

   1 /* PR libstdc++/88101 */
   2
   3 struct S { char a; short b; char c; } s1[24], s2[24];
   4 struct T { char a; long long b; char c; struct S d[3]; long long e; char f; } t1, t2;
   5 struct U { char a; long long b; char c; struct S d[25]; long long e; char f; } u1, u2;
   6
   7 __attribute__((noipa)) void
   8 foo (struct S *s, struct T *t, struct U *u)
   9 {
  10   int i;
  11   t->a = -1; t->b = -1; t->c = -1; t->e = -1; t->f = -1;
  12   u->a = -1; u->b = -1; u->c = -1; u->e = -1; u->f = -1;
  13   for (i = 0; i < 24; i++)
  14     {
  15       s[i].a = -1;
  16       s[i].b = -1;
  17       s[i].c = -1;
  18     }
  19   for (i = 0; i < 3; i++)
  20     {
  21       t->d[i].a = -1;
  22       t->d[i].b = -1;
  23       t->d[i].c = -1;
  24     }
  25   for (i = 0; i < 25; i++)
  26     {
  27       u->d[i].a = -1;
  28       u->d[i].b = -1;
  29       u->d[i].c = -1;
  30     }
  31 }
  32
  33 int
  34 main ()
  35 {
  36   __builtin_memset (&s2, -1, sizeof (s2));
  37   __builtin_memset (&t2, -1, sizeof (t2));
  38   __builtin_memset (&u2, -1, sizeof (u2));
  39   foo (&s1[0], &t1, &u1);
  40   foo (&s2[0], &t2, &u2);
  41   __builtin_clear_padding (&s2);
  42   __builtin_clear_padding (&t2);
  43   __builtin_clear_padding (&u2);
  44   if (__builtin_memcmp (&s1, &s2, sizeof (s1))
  45       || __builtin_memcmp (&t1, &t2, sizeof (t1))
  46       || __builtin_memcmp (&u1, &u2, sizeof (u1)))
  47     __builtin_abort ();
  48   return 0;
  49 }