X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbesched_t.h;h=abefd2d6484c2abd2994e1168245369639e9ecb4;hb=6e78e108572e6c3fd33abe6557945092646b4cd9;hp=b7390272755c6a85710dc48a516509e9bff0e5d7;hpb=b55f1b73476b0c878789df7127f0a4cccfb38453;p=libfirm

diff --git a/ir/be/besched_t.h b/ir/be/besched_t.h
index b73902727..abefd2d64 100644
--- a/ir/be/besched_t.h
+++ b/ir/be/besched_t.h
@@ -53,7 +53,7 @@ static INLINE int _sched_get_time_step(const ir_node *irn)
  * @param irn The node to check for.
  * @return 1, if the node consumes/produces data, false if not.
  */
-static INLINE int to_appear_in_schedule(ir_node *irn)
+static INLINE int to_appear_in_schedule(const ir_node *irn)
 {
   if(get_irn_opcode(irn) == iro_Start)
   	return 1;
@@ -205,11 +205,12 @@ static INLINE void _sched_remove(ir_node *irn)
 {
   sched_info_t *info = get_irn_sched_info(irn);
   list_del(&info->list);
+	INIT_LIST_HEAD(&info->list);
   info->scheduled = 0;
 }
 
 /**
- * Check, if thenode is scheduled.
+ * Check, if the node is scheduled.
  * @param irn The node.
  * @return 1, if the node is scheduled, 0 if not.
  */
@@ -247,6 +248,21 @@ extern int sched_verify(const ir_node *block);
  */
 extern int sched_verify_irg(ir_graph *irg);
 
+/**
+ * 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(get_nodes_block(n1) == get_nodes_block(n2));
+	return _sched_get_time_step(n1) < _sched_get_time_step(n2);
+}
+
 /**
  * A predicate for a node.
  * @param irn The node.
@@ -272,16 +288,17 @@ extern ir_node *sched_skip(ir_node *from, int forward,
     sched_predicator_t *predicator, void *data);
 
 #define sched_get_time_step(irn)	    _sched_get_time_step(irn)
-#define sched_has_succ(irn) 				  _sched_has_succ(irn)
-#define sched_has_prev(irn) 				  _sched_has_prev(irn)
-#define sched_succ(irn) 						  _sched_succ(irn)
-#define sched_prev(irn) 						  _sched_prev(irn)
-#define sched_first(irn) 						  _sched_first(irn)
-#define sched_last(irn) 						  _sched_last(irn)
+#define sched_has_succ(irn) 			_sched_has_succ(irn)
+#define sched_has_prev(irn) 			_sched_has_prev(irn)
+#define sched_succ(irn) 				_sched_succ(irn)
+#define sched_prev(irn) 				_sched_prev(irn)
+#define sched_first(irn) 				_sched_first(irn)
+#define sched_last(irn) 				_sched_last(irn)
 #define sched_add_before(before, irn)	_sched_add_before(before, irn)
 #define sched_add_after(after, irn) 	_sched_add_after(after, irn)
 #define sched_remove(irn)            	_sched_remove(irn)
-#define sched_is_scheduled(irn)       _sched_is_scheduled(irn)
-#define sched_cmp(a, b)               _sched_cmp(a, b)
+#define sched_is_scheduled(irn)         _sched_is_scheduled(irn)
+#define sched_comes_after(n1, n2)       _sched_comes_after(n1, n1)
+#define sched_cmp(a, b)                 _sched_cmp(a, b)
 
 #endif