X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbesched_t.h;h=f5a2e18ac9732b0339aabb220a18a0e78bb18d32;hb=5316c6fdb1dec69a9082218cbe67b6ec43dc4e39;hp=b803b659219cd6f72bb7286fc1b34ad6ba557bf4;hpb=d26125ca5720072a4975d37c0a17f7ad6c18de2d;p=libfirm

diff --git a/ir/be/besched_t.h b/ir/be/besched_t.h
index b803b6592..f5a2e18ac 100644
--- a/ir/be/besched_t.h
+++ b/ir/be/besched_t.h
@@ -2,17 +2,27 @@
 #ifndef _BESCHED_T_H
 #define _BESCHED_T_H
 
+#define SCHED_INITIAL_GRANULARITY (1 << 14)
+
 #include "list.h"
 #include "irnode_t.h"
 #include "irgraph_t.h"
 
+#include "besched.h"
+
+typedef unsigned int sched_timestep_t;
+
 extern size_t sched_irn_data_offset;
 
+/**
+ * The schedule structure which is present at each ir node.
+ */
 typedef struct _sched_info_t {
-	struct list_head list;
-	int time_step;
+	struct list_head list;         /**< The list head to list the nodes in a schedule. */
+	sched_timestep_t time_step;    /**< If a is after b in a schedule, its time step is
+                                        larger than b's. */
 
-	unsigned is_last_use_in_block : 1;
+  int scheduled : 1;             /**< 1, if the node is in the schedule of the block, 0 else. */
 } sched_info_t;
 
 #define _sched_entry(list_head) (list_entry(list_head, sched_info_t, list))
@@ -20,15 +30,51 @@ typedef struct _sched_info_t {
 #define get_irn_sched_info(irn) get_irn_data(irn, sched_info_t, sched_irn_data_offset)
 #define get_sched_info_irn(sched_info) get_irn_data_base(sched_info, sched_irn_data_offset)
 
+/**
+ * Init the scheduling stuff.
+ * To be called from the central backend initialization routine.
+ */
+void be_sched_init(void);
+
+/**
+ * Get the time step of an irn in a schedule.
+ * @param irn The node.
+ * @return The time step in the schedule.
+ */
+static INLINE int _sched_get_time_step(const ir_node *irn)
+{
+	return get_irn_sched_info(irn)->time_step;
+}
+
+/**
+ * Checks, if a node is to appear in a schedule. Such nodes either
+ * consume real data (mode datab) or produce such.
+ * @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)
+{
+  int i, n;
+
+  for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
+    ir_node *op = get_irn_n(irn, i);
+    if(mode_is_datab(get_irn_mode(op)))
+      return 1;
+  }
+
+  return mode_is_datab(get_irn_mode(irn));
+}
+
 /**
  * Check, if an ir_node has a scheduling successor.
  * @param irn The ir node.
  * @return 1, if the node has a scheduling successor, 0 if not.
  */
-static INLINE int sched_has_succ(const ir_node *irn)
+static INLINE int _sched_has_next(const ir_node *irn)
 {
+  const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
 	const sched_info_t *info = get_irn_sched_info(irn);
-	const sched_info_t *block_info = get_irn_sched_info(get_nodes_block(irn));
+	const sched_info_t *block_info = get_irn_sched_info(block);
 	return info->list.next != &block_info->list;
 }
 
@@ -37,60 +83,92 @@ static INLINE int sched_has_succ(const ir_node *irn)
  * @param irn The ir node.
  * @return 1, if the node has a scheduling predecessor, 0 if not.
  */
-static INLINE int sched_has_prev(const ir_node *irn)
+static INLINE int _sched_has_prev(const ir_node *irn)
 {
+  const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
 	const sched_info_t *info = get_irn_sched_info(irn);
-	const sched_info_t *block_info = get_irn_sched_info(get_nodes_block(irn));
+	const sched_info_t *block_info = get_irn_sched_info(block);
 	return info->list.prev != &block_info->list;
 }
 
 /**
  * Get the scheduling successor of a node.
  * @param irn The node.
- * @return The next ir node in the schedule or NULL, if this node has no
- * successor.
+ * @return The next ir node in the schedule or the block, if the node has no next node.
  */
-static INLINE const ir_node *sched_succ(const ir_node *irn)
+static INLINE ir_node *_sched_next(const ir_node *irn)
 {
 	const sched_info_t *info = get_irn_sched_info(irn);
-	return sched_has_succ(irn) ? get_sched_info_irn(_sched_entry(info->list.next)) : NULL;
+	return get_sched_info_irn(_sched_entry(info->list.next));
 }
 
 /**
  * Get the scheduling predecessor of a node.
  * @param irn The node.
- * @return The next ir node in the schedule or NULL, if this node has no
+ * @return The next ir node in the schedule or the block, if the node has no predecessor.
  * predecessor.
  */
-static INLINE const ir_node *sched_prev(const ir_node *irn)
+static INLINE ir_node *_sched_prev(const ir_node *irn)
 {
 	const sched_info_t *info = get_irn_sched_info(irn);
-	return sched_has_prev(irn) ? get_sched_info_irn(_sched_entry(info->list.prev)) : NULL;
+	return get_sched_info_irn(_sched_entry(info->list.prev));
 }
 
 /**
  * Get the first node in a block schedule.
  * @param block The block of which to get the schedule.
- * @return The first node in the schedule or NULL if there is none.
+ * @return The first node in the schedule or the block itself
+ *         if there is no node in the schedule.
  */
-static INLINE const ir_node *sched_first(const ir_node *block)
+static INLINE ir_node *_sched_first(const ir_node *block)
 {
-	const sched_info_t *info = get_irn_sched_info(block);
 	assert(is_Block(block) && "Need a block here");
-	return !list_empty(&info->list) ? get_sched_info_irn(_sched_entry(info->list.next)) : NULL;
+	return _sched_next(block);
 }
 
 /**
  * Get the last node in a schedule.
- * @param block The block to get the schedule for.
- * @return The last ir node in a schedule, or NULL if no schedule exists
- * or it is empty.
+ * @param  block The block to get the schedule for.
+ * @return The last ir node in a schedule, or the block itself
+ *         if there is no node in the schedule.
  */
-static INLINE const ir_node *sched_last(const ir_node *block)
+static INLINE ir_node *_sched_last(const ir_node *block)
 {
-	const sched_info_t *info = get_irn_sched_info(block);
 	assert(is_Block(block) && "Need a block here");
-	return !list_empty(&info->list) ? get_sched_info_irn(_sched_entry(info->list.prev)) : NULL;
+	return _sched_prev(block);
+}
+
+/**
+ * Reassign the time steps in the schedule.
+ * @param block The schedule to update.
+ */
+void sched_renumber(const ir_node *block);
+
+static INLINE void _sched_set_time_stamp(ir_node *irn)
+{
+  sched_info_t *inf = get_irn_sched_info(irn);
+  sched_timestep_t before_ts = _sched_entry(inf->list.prev)->time_step;
+  sched_timestep_t after_ts = _sched_entry(inf->list.next)->time_step;
+
+  /*
+   * If we are the last, we can give us a big time step,
+   * else we have to compute our time step from our
+   * neighbours.
+   */
+  if(before_ts >= after_ts)
+    inf->time_step = before_ts + SCHED_INITIAL_GRANULARITY;
+  else {
+    sched_timestep_t ts = (before_ts + after_ts) / 2;
+
+    /*
+     * If the resolution went out, we have to renumber
+     * this block.
+     */
+    if(ts == before_ts || ts == after_ts)
+      sched_renumber(get_nodes_block(irn));
+    else
+      inf->time_step = ts;
+  }
 }
 
 /**
@@ -99,22 +177,111 @@ static INLINE const ir_node *sched_last(const ir_node *block)
  * @param irn The node to add.
  * @return The given node.
  */
-static INLINE const ir_node *sched_add(ir_node *block, const ir_node *irn)
+static INLINE ir_node *_sched_add_before(ir_node *before, ir_node *irn)
 {
-	assert(is_Block(block) && "Need a block here");
-	list_add_tail(&get_irn_sched_info(irn)->list, &get_irn_sched_info(block)->list);
+  sched_info_t *info = get_irn_sched_info(irn);
+	list_add_tail(&info->list, &get_irn_sched_info(before)->list);
+  _sched_set_time_stamp(irn);
+  info->scheduled = 1;
 	return irn;
 }
 
 /**
- * A shorthand macro for iterating over a schedule.
- * @param block The block.
- * @param irn A ir node pointer used as an iterator.
+ * Add a node to a block schedule.
+ * @param block The block to whose schedule the node shall be added to.
+ * @param irn The node to add.
+ * @return The given node.
  */
-#define sched_foreach(block,irn) for(irn = sched_first(block); irn; irn = sched_succ(irn))
+static INLINE ir_node *_sched_add_after(ir_node *after, ir_node *irn)
+{
+  sched_info_t *info = get_irn_sched_info(irn);
+	list_add(&info->list, &get_irn_sched_info(after)->list);
+  _sched_set_time_stamp(irn);
+  info->scheduled = 1;
+	return irn;
+}
+
+/**
+ * Remove a node from the scheduled.
+ * @param irn The node.
+ */
+static INLINE void _sched_remove(ir_node *irn)
+{
+  sched_info_t *info = get_irn_sched_info(irn);
+  list_del(&info->list);
+  info->scheduled = 0;
+}
 
+/**
+ * Check, if thenode is scheduled.
+ * @param irn The node.
+ * @return 1, if the node is scheduled, 0 if not.
+ */
+static INLINE int _sched_is_scheduled(const ir_node *irn)
+{
+  return get_irn_sched_info(irn)->scheduled;
+}
+
+/**
+ * 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;
+}
+
+/**
+ * Verify a schedule.
+ * @param block The block whose schedule to verify.
+ * @return      1, if the schedule is proper, 0 if not.
+ */
+extern int sched_verify(const ir_node *block);
+
+/**
+ * Verify the schedules in all blocks of the irg.
+ * @param irg The program graph.
+ * @return    1, if all schedules were right, 0 if not.
+ */
+extern int sched_verify_irg(ir_graph *irg);
+
+/**
+ * A predicate for a node.
+ * @param irn The node.
+ * @param data The custom data.
+ * @return 1 or 0, depending on your criteria.
+ */
+typedef int (sched_predicator_t)(const ir_node *irn, void *data);
+
+/**
+ * Skip nodes in a schedule.
+ * @param from The node to start from.
+ * @param forward The direction (1 for forward, 0 for backward).
+ * @param predicator The one who decides what is skipped.
+ * @param data Food for the predicator.
+ * @return The first node rejected by the predicator or the block
+ * itself if none was rejected.
+ */
+extern ir_node *sched_skip(ir_node *from, int forward,
+    sched_predicator_t *predicator, void *data);
 
-#define sched_foreach_reverse(block,irn) \
-	for(irn = sched_last(block); irn; irn = sched_prev(irn))
+#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_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)
 
 #endif