AVL_XPARENT
addr = (uintptr_t)AVL_XPARENT(node);
parent = AVL_XPARENT(parent);
node = AVL_XPARENT(node);
avl_node_t *parent = AVL_XPARENT(node);
parent = AVL_XPARENT(node);
parent = AVL_XPARENT(node);
parent = AVL_XPARENT(delete);
parent = AVL_XPARENT(delete);
parent = AVL_XPARENT(node);
parent = AVL_XPARENT(node);
if (AVL_XPARENT(np) != np)