+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
-#ifndef _BESCHED_T_H
-#define _BESCHED_T_H
+/**
+ * @file
+ * @brief Scheduling utilities for nodes in Blocks and Blocks.
+ * @author Sebastian Hack
+ * @version $Id$
+ */
+#ifndef FIRM_BE_BESCHED_T_H
+#define FIRM_BE_BESCHED_T_H
+
+#define SCHED_INITIAL_GRANULARITY (1 << 14)
#include "list.h"
#include "irnode_t.h"
#include "irgraph_t.h"
+#include "irphase_t.h"
+#include "irphases_t.h"
+#include "beutil.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.
+ *
+ * Currently, only basic blocks are scheduled. The list head of
+ * every block schedule list is the Block list.
+ */
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. */
+ unsigned idx; /**< The node index of the nodes this schedule info belongs to. */
+ sched_timestep_t time_step; /**< If a is after b in a schedule, its time step is larger than b's. */
+ unsigned 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))
+#define _sched_entry(list_head) (list_entry(list_head, sched_info_t, list))
+#define get_irn_sched_info(irn) ((sched_info_t *) get_or_set_irn_phase_info(skip_Proj_const(irn), PHASE_BE_SCHED))
+#define get_sched_info_irn(irg, sched_info) get_idx_irn((irg), (sched_info)->idx)
-#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)
+/**
+ * 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 get_irg_phase(irg, PHASE_BE_SCHED) != NULL;
+}
/**
- * Init the scheduling stuff.
- * To be called from the central backend initialization routine.
+ * Check, if the node is scheduled.
+ * @param irn The node.
+ * @return 1, if the node is scheduled, 0 if not.
*/
-void be_sched_init(void);
+static INLINE int _sched_is_scheduled(const ir_node *irn)
+{
+ return get_irn_sched_info(irn)->scheduled;
+}
/**
* 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)
+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_Start:
+ 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_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;
}
* @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(get_irn_irg(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(get_irn_irg(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(const 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;
+ }
}
/**
* @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 void _sched_add_before(const ir_node *before, const 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);
- return irn;
+ sched_info_t *info = get_irn_sched_info(irn);
+ assert(_sched_is_scheduled(before));
+ assert(!_sched_is_scheduled(irn));
+ assert(!is_Proj(irn));
+ list_add_tail(&info->list, &get_irn_sched_info(before)->list);
+ _sched_set_time_stamp(irn);
+ info->scheduled = 1;
+}
+
+/**
+ * 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(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;
}
-#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(block,irn) __sched_add(block,irn)
+/**
+ * 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 an arch_env_t * used to determine if irn is a cf
+ * node for the given architecture
+ */
+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
+#endif /* FIRM_BE_BESCHED_T_H */
projects / libfirm / blobdiff