+static inline void _sched_add_after(const ir_node *after, const ir_node *irn)
+{
+ sched_info_t *info = get_irn_sched_info(irn);
+ assert(_sched_is_scheduled(after));
+ assert(!_sched_is_scheduled(irn));
+ assert(!is_Proj(irn));
+ list_add(&info->list, &get_irn_sched_info(after)->list);
+ _sched_set_time_stamp(irn);
+ info->scheduled = 1;
+}
+
+static inline void _sched_init_block(const ir_node *block)
+{
+ sched_info_t *info = get_irn_sched_info(block);
+ assert(info->scheduled == 0 && info->time_step == 0);
+ INIT_LIST_HEAD(&info->list);
+ info->scheduled = 1;
+}
+
+static inline void _sched_reset(const ir_node *node)
+{
+ sched_info_t *info = get_irn_sched_info(node);
+ info->scheduled = 0;
+}
+
+/**
+ * Remove a node from the scheduled.
+ * @param irn The node.
+ */
+static inline void _sched_remove(const ir_node *irn)
+{
+ sched_info_t *info = get_irn_sched_info(irn);
+ list_del(&info->list);
+ INIT_LIST_HEAD(&info->list);
+ info->scheduled = 0;
+}
+
+/**
+ * Compare two nodes according to their position in the schedule.
+ * @param a The first node.
+ * @param b The second node.
+ * @return A number smaller, equals to or larger than 0, if a is
+ * before, the same, or after b in the schedule.
+ */
+static inline int _sched_cmp(const ir_node *a, const ir_node *b)
+{
+ assert(_sched_is_scheduled(a) && _sched_is_scheduled(b));
+ assert(get_nodes_block(a) == get_nodes_block(b));
+
+ return get_irn_sched_info(a)->time_step - get_irn_sched_info(b)->time_step;
+}
+
+/**
+ * Checks, if one node is scheduled before another.
+ * @param n1 A node.
+ * @param n2 Another node.
+ * @return 1, if n1 is in front of n2 in the schedule, 0 else.
+ * @note Both nodes must be in the same block.
+ */
+static inline int _sched_comes_after(const ir_node *n1, const ir_node *n2)
+{
+ assert(_sched_is_scheduled(n1));
+ assert(_sched_is_scheduled(n2));
+ assert((is_Block(n1) ? n1 : get_nodes_block(n1)) == (is_Block(n2) ? n2 : get_nodes_block(n2)));
+ return _sched_get_time_step(n1) < _sched_get_time_step(n2);
+}
+
+/**
+ * A predicate for a node.
+ * @param irn The node.
+ * @param data The custom data.
+ * @return 1 if irn should be skipped. Else 0.
+ */
+typedef int (sched_predicator_t)(const ir_node *irn, void *data);