DD_USED_NUM
for (t = 0; t < DD_USED_NUM; t++)
ASSERT(type < DD_USED_NUM);
for (t = 0; t < DD_USED_NUM; t++)
ASSERT(oldtype < DD_USED_NUM);
ASSERT(newtype < DD_USED_NUM);
uint64_t dd_used_breakdown[DD_USED_NUM];