+/*
+ * 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>
sched_timestep_t curr_time; /**< current time of the scheduler */
void *selector_env; /**< the backend selector environment */
const list_sched_selector_t *selector; /**< the actual backend selector */
+ be_lv_t *liveness; /**< The liveness for the irg */
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
*/
int num_out = 0;
int num_in = 0;
int i;
+ ir_node *block = get_nodes_block(irn);
+
+ if (be_is_Call(irn)) {
+ /* we want calls prefered */
+ return -5;
+ }
if (get_irn_mode(irn) == mode_T) {
/* mode_T nodes: num out regs == num Projs with mode datab */
/* num in regs: number of ins with mode datab and not ignore */
for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
ir_node *in = get_irn_n(irn, i);
- if (mode_is_datab(get_irn_mode(in)) && ! arch_irn_is(env->arch_env, in, ignore))
+
+ if (! be_is_live_end(env->liveness, block, in) && /* if the value lives outside of block: do not count */
+ mode_is_datab(get_irn_mode(in)) && /* must be data node */
+ ! arch_irn_is(env->arch_env, in, ignore)) /* ignore "ignore" nodes :) */
num_in++;
}
if (get_irn_critical_path_len(env, root) < path_len) {
set_irn_critical_path_len(env, root, path_len);
}
+ /* calculate number of users (needed for heuristic) */
+ set_irn_num_user(env, root, get_num_successors(root));
+
+ /* calculate register difference (needed for heuristic) */
+ set_irn_reg_diff(env, root, get_reg_difference(env, root));
/* Phi nodes always leave the block */
for (i = get_irn_arity(root) - 1; i >= 0; --i) {
ir_node *pred = get_irn_n(root, i);
DBG((env->dbg, LEVEL_3, " node %+F\n", pred));
+
/* Blocks may happen as predecessors of End nodes */
if (is_Block(pred))
continue;
if (get_nodes_block(pred) != block)
continue;
- /* calculate number of users (needed for heuristic) */
- set_irn_num_user(env, root, get_num_successors(root));
-
- /* calculate register difference (needed for heuristic) */
- set_irn_reg_diff(env, root, get_reg_difference(env, root));
-
set_irn_link(pred, NULL);
descent(pred, block, list, env, path_len);
foreach_out_edge(block, edge) {
ir_node *succ = get_edge_src_irn(edge);
+ if (is_Anchor(succ))
+ continue;
if (is_root(succ, block)) {
mark_root_node(env, succ);
set_irn_link(succ, root);
* @param birg The backend irg object
* @return The environment
*/
-static trace_env_t *trace_init(const arch_env_t *arch_env, ir_graph *irg) {
+static trace_env_t *trace_init(const be_irg_t *birg) {
trace_env_t *env = xcalloc(1, sizeof(*env));
+ ir_graph *irg = be_get_birg_irg(birg);
int nn = get_irg_last_idx(irg);
- env->arch_env = arch_env;
+ env->arch_env = be_get_birg_arch_env(birg);
env->curr_time = 0;
env->sched_info = NEW_ARR_F(trace_irn_t, nn);
+ env->liveness = be_liveness(birg);
FIRM_DBG_REGISTER(env->dbg, "firm.be.sched.trace");
+ be_liveness_assure_chk(env->liveness);
memset(env->sched_info, 0, nn * sizeof(*(env->sched_info)));
return env;
*/
static void trace_free(void *data) {
trace_env_t *env = data;
+ be_liveness_free(env->liveness);
DEL_ARR_F(env->sched_info);
free(env);
}
/**
* 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;
+ (void) live_set;
/* 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);
}
}
return irn;
}
-static void *muchnik_init_graph(const list_sched_selector_t *vtab, const arch_env_t *arch_env, ir_graph *irg)
+static void *muchnik_init_graph(const list_sched_selector_t *vtab, const be_irg_t *birg)
{
- trace_env_t *env = trace_init(arch_env, irg);
+ trace_env_t *env = trace_init(birg);
env->selector = vtab;
- env->selector_env = env;
+ env->selector_env = (void*) be_get_birg_arch_env(birg);
return (void *)env;
}
return graph_env;
}
-static const list_sched_selector_t muchnik_selector_struct = {
+const list_sched_selector_t muchnik_selector = {
muchnik_init_graph,
muchnik_init_block,
muchnik_select,
trace_free /* finish_graph */
};
-const list_sched_selector_t *muchnik_selector = &muchnik_selector_struct;
-
/**
* 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 16
+#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;
DBG((trace_env->dbg, LEVEL_4, "\t#user: %d (%d)\n", get_irn_num_user(trace_env, irn), get_irn_num_user(trace_env, irn) << PRIO_NUMSUCCS));
DBG((trace_env->dbg, LEVEL_4, "\tetime: %d (%d)\n", get_irn_etime(trace_env, irn), 0 - (get_irn_etime(trace_env, irn) << PRIO_TIME)));
DBG((trace_env->dbg, LEVEL_4, "\tpreorder: %d (%d)\n", get_irn_preorder(trace_env, irn), get_irn_preorder(trace_env, irn) << PRIO_PREORD));
- DBG((trace_env->dbg, LEVEL_4, "\treg diff: %d (%d)\n", get_irn_reg_diff(trace_env, irn), 0 - cand_reg_fact));
+ DBG((trace_env->dbg, LEVEL_4, "\treg diff: %d (%d)\n", get_irn_reg_diff(trace_env, irn), 0 - reg_fact));
DBG((trace_env->dbg, LEVEL_4, "\tpressure: %d\n", cur_pressure));
}
}
return cand;
}
-static const list_sched_selector_t heuristic_selector_struct = {
+const list_sched_selector_t heuristic_selector = {
muchnik_init_graph,
muchnik_init_block,
heuristic_select,
NULL, /* finish_block */
trace_free /* finish_graph */
};
-
-const list_sched_selector_t *heuristic_selector = &heuristic_selector_struct;
projects / libfirm / blobdiff