IS_DIRECT_BIT     400 lj_alloc.c       (!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_DIRECT_BIT))
IS_DIRECT_BIT     753 lj_alloc.c           p->prev_foot = offset | IS_DIRECT_BIT;
IS_DIRECT_BIT     773 lj_alloc.c         size_t offset = oldp->prev_foot & ~IS_DIRECT_BIT;
IS_DIRECT_BIT    1272 lj_alloc.c           if ((prevsize & IS_DIRECT_BIT) != 0) {
IS_DIRECT_BIT    1273 lj_alloc.c     	prevsize &= ~IS_DIRECT_BIT;