+/*
+ * Copyright (C) 1995-2007 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.
+ */
+
/**
- * Implements a trace scheduler as presented in Muchnik[TM].
- * Originally implemented by Michael Beck.
- * @author Christian Wuerdig
- * @date 28.08.2006
- * @cvs-id $Id$
+ * @file
+ * @brief Implements a trace scheduler as presented in Muchnik[TM].
+ * @author Michael Beck
+ * @date 28.08.2006
+ * @version $Id$
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include <stdlib.h>
DEBUG_ONLY(firm_dbg_module_t *dbg;)
} trace_env_t;
+/**
+ * Returns a random node from a nodeset
+ */
+static ir_node *get_nodeset_node(const ir_nodeset_t *nodeset)
+{
+ ir_nodeset_iterator_t iter;
+
+ ir_nodeset_iterator_init(&iter, nodeset);
+ return ir_nodeset_iterator_next(&iter);
+}
+
/**
* Returns non-zero if the node is a root node
*/
/**
* Simple selector. Just assure that jumps are scheduled last.
*/
-static ir_node *basic_selection(const arch_env_t *arch_env, nodeset *ready_set) {
+static ir_node *basic_selection(const arch_env_t *arch_env, ir_nodeset_t *ready_set) {
ir_node *irn = NULL;
+ ir_nodeset_iterator_t iter;
/* assure that branches and constants are executed last */
- for (irn = nodeset_first(ready_set); irn; irn = nodeset_next(ready_set)) {
+ foreach_ir_nodeset(ready_set, irn, iter) {
if (! arch_irn_class_is(arch_env, irn, branch)) {
- nodeset_break(ready_set);
return irn;
}
}
/* at last: schedule branches */
- irn = nodeset_first(ready_set);
- nodeset_break(ready_set);
+ irn = get_nodeset_node(ready_set);
return irn;
}
/**
* The muchnik selector.
*/
-static ir_node *muchnik_select(void *block_env, nodeset *ready_set, nodeset *live_set)
+static ir_node *muchnik_select(void *block_env, ir_nodeset_t *ready_set, ir_nodeset_t *live_set)
{
trace_env_t *env = block_env;
- nodeset *mcands, *ecands;
+ ir_nodeset_t mcands, ecands;
+ ir_nodeset_iterator_t iter;
sched_timestep_t max_delay = 0;
ir_node *irn;
/* calculate the max delay of all candidates */
- foreach_nodeset(ready_set, irn) {
+ foreach_ir_nodeset(ready_set, irn, iter) {
sched_timestep_t d = get_irn_delay(env, irn);
max_delay = d > max_delay ? d : max_delay;
}
- mcands = new_nodeset(8);
- ecands = new_nodeset(8);
+ ir_nodeset_init_size(&mcands, 8);
+ ir_nodeset_init_size(&ecands, 8);
/* build mcands and ecands */
- foreach_nodeset(ready_set, irn) {
+ foreach_ir_nodeset(ready_set, irn, iter) {
if (get_irn_delay(env, irn) == max_delay) {
- nodeset_insert(mcands, irn);
+ ir_nodeset_insert(&mcands, irn);
if (get_irn_etime(env, irn) <= env->curr_time)
- nodeset_insert(ecands, irn);
+ ir_nodeset_insert(&ecands, irn);
}
}
/* select a node */
- if (nodeset_count(mcands) == 1) {
- irn = nodeset_first(mcands);
+ if (ir_nodeset_size(&mcands) == 1) {
+ irn = get_nodeset_node(&mcands);
DB((env->dbg, LEVEL_3, "\tirn = %+F, mcand = 1, max_delay = %u\n", irn, max_delay));
}
else {
- int cnt = nodeset_count(ecands);
+ int cnt = ir_nodeset_size(&ecands);
if (cnt == 1) {
- irn = nodeset_first(ecands);
+ irn = get_nodeset_node(&ecands);
if (arch_irn_class_is(env->arch_env, irn, branch)) {
/* BEWARE: don't select a JUMP if others are still possible */
}
else if (cnt > 1) {
DB((env->dbg, LEVEL_3, "\tecand = %d, max_delay = %u\n", cnt, max_delay));
- irn = basic_selection(env->arch_env, ecands);
+ irn = basic_selection(env->arch_env, &ecands);
}
else {
force_mcands:
- DB((env->dbg, LEVEL_3, "\tmcand = %d\n", nodeset_count(mcands)));
- irn = basic_selection(env->arch_env, mcands);
+ DB((env->dbg, LEVEL_3, "\tmcand = %d\n", ir_nodeset_size(&mcands)));
+ irn = basic_selection(env->arch_env, &mcands);
}
}
/**
* Execute the heuristic function.
*/
-static ir_node *heuristic_select(void *block_env, nodeset *ns, nodeset *lv)
+static ir_node *heuristic_select(void *block_env, ir_nodeset_t *ns, ir_nodeset_t *lv)
{
trace_env_t *trace_env = block_env;
ir_node *irn, *cand = NULL;
int max_prio = INT_MIN;
int cur_prio = INT_MIN;
- int cur_pressure = nodeset_count(lv);
+ int cur_pressure = ir_nodeset_size(lv);
int reg_fact, cand_reg_fact;
+ ir_nodeset_iterator_t iter;
/* prefer instructions which can be scheduled early */
-#define PRIO_TIME 8
+#define PRIO_TIME 3
/* prefer instructions with lots of successors */
#define PRIO_NUMSUCCS 8
/* prefer instructions with long critical path */
#define PRIO_CHG_PRESS 8
/* priority based selection, heuristic inspired by mueller diss */
- foreach_nodeset(ns, irn) {
+ foreach_ir_nodeset(ns, irn, iter) {
/* make sure that branches are scheduled last */
if (! arch_irn_class_is(trace_env->arch_env, irn, branch)) {
int rdiff = get_irn_reg_diff(trace_env, irn);
int sign = rdiff < 0;
int chg = (rdiff < 0 ? -rdiff : rdiff) << PRIO_CHG_PRESS;
- reg_fact = chg << cur_pressure;
+ //reg_fact = chg << cur_pressure;
+ reg_fact = chg * cur_pressure;
if (reg_fact < chg)
reg_fact = INT_MAX - 2;
reg_fact = sign ? -reg_fact : reg_fact;
projects / libfirm / blobdiff