X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbesched.h;h=e78f978846c51de9ad7ae373504f0ae29f8b4b01;hb=69a5cd48b51a38cf6abc517bca2feef9f3a6c433;hp=398232f8f68e49361219ab4bb5f25cc2086e75df;hpb=7a9a11e3be2aee776c3045e8c3c4742a0b6bbcbe;p=libfirm

diff --git a/ir/be/besched.h b/ir/be/besched.h
index 398232f8f..e78f97884 100644
--- a/ir/be/besched.h
+++ b/ir/be/besched.h
@@ -31,6 +31,8 @@
 #include "irgraph.h"
 #include "irnode.h"
 #include "beirg.h"
+#include "beinfo.h"
+#include "beutil.h"
 
 void be_sched_dump(FILE *f, ir_graph *irg);
 
@@ -93,4 +95,336 @@ void    sched_remove(ir_node *irn);
  */
 void be_remove_dead_nodes_from_schedule(be_irg_t *birg);
 
+#define SCHED_INITIAL_GRANULARITY (1 << 14)
+#define get_irn_sched_info(irn)             (&be_get_info(skip_Proj_const(irn))->sched_info)
+
+/**
+ * Returns non-zero if schedule information is available
+ * for a given graph.
+ * @param irg  The graph.
+ */
+static inline int _have_sched_info(const ir_graph *irg)
+{
+	return be_info_initialized(irg);
+}
+
+/**
+ * Check, if the node 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)->next != NULL;
+}
+
+/**
+ * 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)
+{
+	assert(_sched_is_scheduled(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(const ir_node *irn)
+{
+	switch(get_irn_opcode(irn)) {
+		case iro_Jmp:
+		case iro_Break:
+			return 1;
+		case iro_Proj:
+			return 0;
+		default:
+			return is_data_node(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_next(const ir_node *irn)
+{
+	const sched_info_t *info  = get_irn_sched_info(irn);
+	const ir_node      *block = is_Block(irn) ? irn : get_nodes_block(irn);
+	return info->next != block;
+}
+
+/**
+ * Check, if an ir_node has a scheduling predecessor.
+ * @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)
+{
+	const sched_info_t *info  = get_irn_sched_info(irn);
+   	const ir_node      *block = is_Block(irn) ? irn : get_nodes_block(irn);
+	return info->prev != block;
+}
+
+/**
+ * Get the scheduling successor of a node.
+ * @param irn The node.
+ * @return The next ir node in the schedule or the block, if the node has no next node.
+ */
+static inline ir_node *_sched_next(const ir_node *irn)
+{
+	const sched_info_t *info = get_irn_sched_info(irn);
+	return info->next;
+}
+
+/**
+ * Get the scheduling predecessor of a node.
+ * @param irn The node.
+ * @return The next ir node in the schedule or the block, if the node has no predecessor.
+ * predecessor.
+ */
+static inline ir_node *_sched_prev(const ir_node *irn)
+{
+	const sched_info_t *info = get_irn_sched_info(irn);
+	return info->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 the block itself
+ *         if there is no node in the schedule.
+ */
+static inline ir_node *_sched_first(const ir_node *block)
+{
+	assert(is_Block(block) && "Need a block here");
+	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 the block itself
+ *         if there is no node in the schedule.
+ */
+static inline ir_node *_sched_last(const ir_node *block)
+{
+	assert(is_Block(block) && "Need a block here");
+	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(const ir_node *irn)
+{
+	sched_info_t       *info      = get_irn_sched_info(irn);
+	const sched_info_t *prev_info = get_irn_sched_info(info->prev);
+	const sched_info_t *next_info = get_irn_sched_info(info->next);
+	sched_timestep_t    before_ts = prev_info->time_step;
+	sched_timestep_t    after_ts  = next_info->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) {
+		info->time_step = before_ts + SCHED_INITIAL_GRANULARITY;
+		/* overflow? */
+		if (info->time_step <= before_ts) {
+			sched_renumber(get_nodes_block(irn));
+		}
+	} 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
+			info->time_step = ts;
+	}
+}
+
+/**
+ * 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.
+ */
+static inline void _sched_add_before(ir_node *before, ir_node *irn)
+{
+	sched_info_t *info      = get_irn_sched_info(irn);
+	ir_node      *next      = before;
+	sched_info_t *next_info = get_irn_sched_info(next);
+	ir_node      *prev      = next_info->prev;
+	sched_info_t *prev_info = get_irn_sched_info(prev);
+	assert(_sched_is_scheduled(before));
+	assert(!_sched_is_scheduled(irn));
+	assert(!is_Proj(before));
+	assert(!is_Proj(irn));
+
+	info->prev = prev;
+	info->next = next;
+	prev_info->next = irn;
+	next_info->prev = irn;
+	_sched_set_time_stamp(irn);
+}
+
+/**
+ * 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.
+ */
+static inline void _sched_add_after(ir_node *after, ir_node *irn)
+{
+	sched_info_t *info      = get_irn_sched_info(irn);
+	ir_node      *prev      = after;
+	sched_info_t *prev_info = get_irn_sched_info(prev);
+	ir_node      *next      = prev_info->next;
+	sched_info_t *next_info = get_irn_sched_info(next);
+	assert(_sched_is_scheduled(after));
+	assert(!_sched_is_scheduled(irn));
+	assert(!is_Proj(after));
+	assert(!is_Proj(irn));
+
+	info->prev = prev;
+	info->next = next;
+	prev_info->next = irn;
+	next_info->prev = irn;
+	_sched_set_time_stamp(irn);
+}
+
+static inline void _sched_init_block(ir_node *block)
+{
+	sched_info_t *info = get_irn_sched_info(block);
+	assert(info->next == NULL && info->time_step == 0);
+	info->next = block;
+	info->prev = block;
+}
+
+static inline void _sched_reset(ir_node *node)
+{
+	sched_info_t *info = get_irn_sched_info(node);
+	info->next = NULL;
+	info->prev = NULL;
+}
+
+/**
+ * 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);
+	ir_node      *prev      = info->prev;
+	ir_node      *next      = info->next;
+	sched_info_t *prev_info = get_irn_sched_info(prev);
+	sched_info_t *next_info = get_irn_sched_info(next);
+	assert(_sched_is_scheduled(irn));
+
+	prev_info->next = next;
+	next_info->prev = prev;
+	info->next      = NULL;
+	info->prev      = NULL;
+}
+
+/**
+ * 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);
+
+/**
+ * Predicate for sched_skip(), returns non-zero if irn is a control flow changing node.
+ *
+ * @param irn   the node to evaluate
+ * @param data  unused
+ */
+int sched_skip_cf_predicator(const ir_node *irn, void *data);
+
+/**
+ * Predicate for sched_skip(), returns non-zero if irn is a Phi node.
+ *
+ * Used with sched_skip().
+ *
+ * @param irn  the node to evaluate
+ * @param data unused
+ */
+int sched_skip_phi_predicator(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 predicator function which decides what is skipped.
+ * @param data        context parameter for the predicator.
+ *
+ * @return The first node not rejected by the predicator or the block
+ *         itself if all nodes were rejected.
+ */
+ir_node *sched_skip(ir_node *from, int forward, sched_predicator_t *predicator, void *data);
+
+#define have_sched_info(irg)            _have_sched_info(irg)
+#define sched_get_time_step(irn)        _sched_get_time_step(irn)
+#define sched_has_next(irn)             _sched_has_next(irn)
+#define sched_has_prev(irn)             _sched_has_prev(irn)
+#define sched_next(irn)                 _sched_next(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_comes_after(n1, n2)       _sched_comes_after(n1, n2)
+#define sched_cmp(a, b)                 _sched_cmp(a, b)
+
+
+
 #endif