1  /* { dg-do compile } */
       2  /* { dg-options "-O3 -Warray-bounds -fdump-tree-cunroll-blocks-details" } */
       3  struct a {int a[8];int b;};
       4  void
       5  t(struct a *a)
       6  {
       7    for (int i=0;a->a[i];i++)
       8      a->a[i]++;
       9  }
      10  /* { dg-final { scan-tree-dump-times "loop with 6 iterations completely unrolled" 1 "cunroll" } } */
      11  /* { dg-final { scan-tree-dump-not "Invalid sum" "cunroll" } } */