+/*
+ * 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.
+ */
+
/**
- * 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>
#include "iredges_t.h"
-#include "besched_t.h"
+#include "besched.h"
#include "belistsched.h"
-#include "benode_t.h"
+#include "benode.h"
+#include "belive.h"
/* we need a special mark */
static char _mark;
typedef struct _trace_env {
trace_irn_t *sched_info; /**< trace scheduling information about the nodes */
- const arch_env_t *arch_env; /**< the arch environment */
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 */
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
*/
-static INLINE unsigned is_root_node(trace_env_t *env, ir_node *n)
+static inline unsigned is_root_node(trace_env_t *env, ir_node *n)
{
int idx = get_irn_idx(n);
/**
* Mark a node as root node
*/
-static INLINE void mark_root_node(trace_env_t *env, ir_node *n)
+static inline void mark_root_node(trace_env_t *env, ir_node *n)
{
int idx = get_irn_idx(n);
/**
* Get the current delay.
*/
-static INLINE sched_timestep_t get_irn_delay(trace_env_t *env, ir_node *n) {
+static inline sched_timestep_t get_irn_delay(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the current delay.
*/
-static INLINE void set_irn_delay(trace_env_t *env, ir_node *n, sched_timestep_t delay) {
+static inline void set_irn_delay(trace_env_t *env, ir_node *n, sched_timestep_t delay)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Get the current etime.
*/
-static INLINE sched_timestep_t get_irn_etime(trace_env_t *env, ir_node *n) {
+static inline sched_timestep_t get_irn_etime(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the current etime.
*/
-static INLINE void set_irn_etime(trace_env_t *env, ir_node *n, sched_timestep_t etime) {
+static inline void set_irn_etime(trace_env_t *env, ir_node *n, sched_timestep_t etime)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Get the number of users.
*/
-static INLINE unsigned get_irn_num_user(trace_env_t *env, ir_node *n) {
+static inline unsigned get_irn_num_user(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the number of users.
*/
-static INLINE void set_irn_num_user(trace_env_t *env, ir_node *n, unsigned num_user) {
+static inline void set_irn_num_user(trace_env_t *env, ir_node *n, unsigned num_user)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Get the register difference.
*/
-static INLINE int get_irn_reg_diff(trace_env_t *env, ir_node *n) {
+static inline int get_irn_reg_diff(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the register difference.
*/
-static INLINE void set_irn_reg_diff(trace_env_t *env, ir_node *n, int reg_diff) {
+static inline void set_irn_reg_diff(trace_env_t *env, ir_node *n, int reg_diff)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Get the pre-order position.
*/
-static INLINE int get_irn_preorder(trace_env_t *env, ir_node *n) {
+static inline int get_irn_preorder(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the pre-order position.
*/
-static INLINE void set_irn_preorder(trace_env_t *env, ir_node *n, int pos) {
+static inline void set_irn_preorder(trace_env_t *env, ir_node *n, int pos)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Get the pre-order position.
*/
-static INLINE unsigned get_irn_critical_path_len(trace_env_t *env, ir_node *n) {
+static inline unsigned get_irn_critical_path_len(trace_env_t *env, ir_node *n)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* Set the pre-order position.
*/
-static INLINE void set_irn_critical_path_len(trace_env_t *env, ir_node *n, unsigned len) {
+static inline void set_irn_critical_path_len(trace_env_t *env, ir_node *n, unsigned len)
+{
int idx = get_irn_idx(n);
assert(idx < ARR_LEN(env->sched_info));
/**
* returns the exec-time for node n.
*/
-static sched_timestep_t exectime(trace_env_t *env, ir_node *n) {
+static sched_timestep_t exectime(trace_env_t *env, ir_node *n)
+{
if (be_is_Keep(n) || is_Proj(n))
return 0;
if (env->selector->exectime)
/**
* Calculates the latency for between two ops
*/
-static sched_timestep_t latency(trace_env_t *env, ir_node *pred, int pred_cycle, ir_node *curr, int curr_cycle) {
+static sched_timestep_t latency(trace_env_t *env, ir_node *pred, int pred_cycle, ir_node *curr, int curr_cycle)
+{
/* a Keep hides a root */
if (be_is_Keep(curr))
return exectime(env, pred);
/**
* Returns the number of users of a node having mode datab.
*/
-static int get_num_successors(ir_node *irn) {
+static int get_num_successors(ir_node *irn)
+{
int sum = 0;
const ir_edge_t *edge;
/**
* Returns the difference of regs_output - regs_input;
*/
-static int get_reg_difference(trace_env_t *env, ir_node *irn) {
+static int get_reg_difference(trace_env_t *env, ir_node *irn)
+{
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 */
+ /* we want calls preferred */
return -5;
}
for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
ir_node *in = get_irn_n(irn, i);
- 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 (!mode_is_datab(get_irn_mode(in)))
+ continue;
+
+ if (arch_irn_is_ignore(in))
+ continue;
+
+ if (be_is_live_end(env->liveness, block, in))
+ continue;
+
+ num_in++;
}
return num_out - num_in;
/**
* descent into a dag and create a pre-order list.
*/
-static void descent(ir_node *root, ir_node *block, ir_node **list, trace_env_t *env, unsigned path_len) {
+static void descent(ir_node *root, ir_node *block, ir_node **list, trace_env_t *env, unsigned path_len)
+{
int i;
if (! is_Phi(root)) {
/**
* Returns non-zero if root is a root in the block block.
*/
-static int is_root(ir_node *root, ir_node *block) {
+static int is_root(ir_node *root, ir_node *block)
+{
const ir_edge_t *edge;
foreach_out_edge(root, edge) {
/**
* Performs initial block calculations for trace scheduling.
*/
-static void trace_preprocess_block(trace_env_t *env, ir_node *block) {
+static void trace_preprocess_block(trace_env_t *env, ir_node *block)
+{
ir_node *root = NULL, *preord = NULL;
ir_node *curr, *irn;
int cur_pos;
foreach_out_edge(block, edge) {
ir_node *succ = get_edge_src_irn(edge);
+ if (is_Block(succ)) {
+ /* A Block-Block edge. This should be the MacroBlock
+ * edge, ignore it. */
+ assert(get_Block_MacroBlock(succ) == block && "Block-Block edge found");
+ continue;
+ }
+ if (is_Anchor(succ)) {
+ /* ignore a keep alive edge */
+ continue;
+ }
if (is_root(succ, block)) {
mark_root_node(env, succ);
set_irn_link(succ, root);
for (cur_pos = 0, curr = root; curr; curr = get_irn_link(curr), cur_pos++) {
sched_timestep_t d;
- if (arch_irn_class_is(env->arch_env, curr, branch)) {
+ if (is_cfop(curr)) {
/* assure, that branches can be executed last */
d = 0;
}
/**
* This functions gets called after a node finally has been made ready.
*/
-static void trace_node_ready(void *data, ir_node *irn, ir_node *pred) {
+static void trace_node_ready(void *data, ir_node *irn, ir_node *pred)
+{
trace_env_t *env = data;
sched_timestep_t etime_p, etime;
/**
* Update the current time after irn has been selected.
*/
-static void trace_update_time(void *data, ir_node *irn) {
+static void trace_update_time(void *data, ir_node *irn)
+{
trace_env_t *env = data;
- if (is_Phi(irn) || get_irn_opcode(irn) == iro_Start) {
+ if (is_Phi(irn) || get_irn_opcode(irn) == beo_Start) {
env->curr_time += get_irn_etime(env, irn);
}
else {
/**
* Allocates memory and initializes trace scheduling environment.
- * @param birg The backend irg object
+ * @param irg The backend irg object
* @return The environment
*/
-static trace_env_t *trace_init(const arch_env_t *arch_env, ir_graph *irg) {
- trace_env_t *env = xcalloc(1, sizeof(*env));
+static trace_env_t *trace_init(ir_graph *irg)
+{
+ trace_env_t *env = XMALLOCZ(trace_env_t);
int nn = get_irg_last_idx(irg);
- env->arch_env = arch_env;
env->curr_time = 0;
env->sched_info = NEW_ARR_F(trace_irn_t, nn);
env->liveness = be_liveness(irg);
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;
* Frees all memory allocated for trace scheduling environment.
* @param env The environment
*/
-static void trace_free(void *data) {
+static void trace_free(void *data)
+{
trace_env_t *env = data;
be_liveness_free(env->liveness);
DEL_ARR_F(env->sched_info);
/**
* 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(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)) {
- if (! arch_irn_class_is(arch_env, irn, branch)) {
- nodeset_break(ready_set);
+ foreach_ir_nodeset(ready_set, irn, iter) {
+ if (!is_cfop(irn)) {
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)) {
+ if (is_cfop(irn)) {
/* BEWARE: don't select a JUMP if others are still possible */
goto force_mcands;
}
}
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(&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(&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, ir_graph *irg)
{
- trace_env_t *env = trace_init(arch_env, irg);
+ trace_env_t *env = trace_init(irg);
env->selector = vtab;
- env->selector_env = (void*) arch_env;
+ env->selector_env = (void*) be_get_irg_arch_env(irg);
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 3
#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)) {
+ if (!is_cfop(irn)) {
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;
DBG((trace_env->dbg, LEVEL_4, "heuristic selected %+F:\n", cand));
}
else {
- cand = basic_selection(trace_env->arch_env, ns);
+ cand = basic_selection(ns);
}
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;
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