-/**
- * Scheduling algorithms.
- * Just a simple list scheduling algorithm is here.
- * @date 20.10.2004
- * @author Sebastian Hack
- * @cvs-id $Id$
+/*
+ * 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.
*/
+/**
+ * @file
+ * @brief Primitive list scheduling with different node selectors.
+ * @author Sebastian Hack
+ * @date 20.10.2004
+ * @version $Id$
+ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "belistsched.h"
#include "beschedmris.h"
#include "beschedrss.h"
-#include "bearch.h"
+#include "bearch_t.h"
#include "bestat.h"
+#include "beirg_t.h"
+
+#include "lc_opts.h"
+#include "lc_opts_enum.h"
-#include <libcore/lc_opts.h>
-#include <libcore/lc_opts_enum.h>
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL);
#define BE_SCHED_NODE(irn) (be_is_Keep(irn) || be_is_CopyKeep(irn) || be_is_RegParams(irn))
enum {
- BE_SCHED_SELECT_TRIVIAL = 0,
- BE_SCHED_SELECT_REGPRESS = 1,
- BE_SCHED_SELECT_MUCHNIK = 2,
- BE_SCHED_SELECT_HEUR = 3,
- BE_SCHED_SELECT_HMUCHNIK = 4,
- BE_SCHED_SELECT_RANDOM = 5
+ BE_SCHED_SELECT_TRIVIAL,
+ BE_SCHED_SELECT_REGPRESS,
+ BE_SCHED_SELECT_MUCHNIK,
+ BE_SCHED_SELECT_HEUR,
+ BE_SCHED_SELECT_HMUCHNIK,
+ BE_SCHED_SELECT_RANDOM,
+ BE_SCHED_SELECT_NORMAL,
};
enum {
/* schedule selector options. */
static const lc_opt_enum_int_items_t sched_select_items[] = {
{ "trivial", BE_SCHED_SELECT_TRIVIAL },
- { "random", BE_SCHED_SELECT_RANDOM },
+ { "random", BE_SCHED_SELECT_RANDOM },
{ "regpress", BE_SCHED_SELECT_REGPRESS },
+ { "normal", BE_SCHED_SELECT_NORMAL },
{ "muchnik", BE_SCHED_SELECT_MUCHNIK },
{ "heur", BE_SCHED_SELECT_HEUR },
{ "hmuchnik", BE_SCHED_SELECT_HMUCHNIK },
static const lc_opt_table_entry_t list_sched_option_table[] = {
LC_OPT_ENT_ENUM_PTR("prep", "schedule preparation", &sched_prep_var),
LC_OPT_ENT_ENUM_PTR("select", "node selector", &sched_select_var),
- { NULL }
+ LC_OPT_LAST
};
/**
*/
typedef struct _block_sched_env_t {
sched_irn_t *sched_info; /**< scheduling info per node, copied from the global scheduler object */
- nodeset *cands; /**< the set of candidates */
+ ir_nodeset_t cands; /**< the set of candidates */
ir_node *block; /**< the current block */
sched_env_t *sched_env; /**< the scheduler environment */
- nodeset *live; /**< simple liveness during scheduling */
+ ir_nodeset_t live; /**< simple liveness during scheduling */
const list_sched_selector_t *selector;
void *selector_block_env;
- DEBUG_ONLY(firm_dbg_module_t *dbg;)
} block_sched_env_t;
+/**
+ * Returns non-zero if a node must be placed in the schedule.
+ */
+static INLINE int must_appear_in_schedule(const list_sched_selector_t *sel, void *block_env, const ir_node *irn)
+{
+ int res = -1;
+
+ /* if there are no uses, don't schedule */
+ if (get_irn_n_edges(irn) < 1)
+ return 0;
+
+ /* else ask the scheduler */
+ if (sel->to_appear_in_schedule)
+ res = sel->to_appear_in_schedule(block_env, irn);
+
+ return res >= 0 ? res : ((to_appear_in_schedule(irn) || BE_SCHED_NODE(irn)) && ! is_Unknown(irn));
+}
+
/**
* Returns non-zero if the node is already scheduled
*/
/**
* Mark a node as already scheduled
*/
-static INLINE void mark_already_scheduled(block_sched_env_t *env, ir_node *n)
+static INLINE void set_already_scheduled(block_sched_env_t *env, ir_node *n)
{
int idx = get_irn_idx(n);
env->sched_info[idx].already_sched = 1;
}
+static void add_to_sched(block_sched_env_t *env, ir_node *irn);
+
/**
* Try to put a node in the ready set.
* @param env The block scheduler environment.
return 0;
}
- nodeset_insert(env->cands, irn);
+ if (! must_appear_in_schedule(env->selector, env, irn)) {
+ add_to_sched(env, irn);
+ DB((dbg, LEVEL_3, "\tmaking immediately available: %+F\n", irn));
+ } else {
+ ir_nodeset_insert(&env->cands, irn);
- /* Notify selector about the ready node. */
- if (env->selector->node_ready)
- env->selector->node_ready(env->selector_block_env, irn, pred);
+ /* Notify selector about the ready node. */
+ if (env->selector->node_ready)
+ env->selector->node_ready(env->selector_block_env, irn, pred);
- DB((env->dbg, LEVEL_2, "\tmaking ready: %+F\n", irn));
+ DB((dbg, LEVEL_2, "\tmaking ready: %+F\n", irn));
+ }
return 1;
}
* @param env The block schedule environment.
* @param irn The node, which usages (successors) are to be made ready.
*/
-static INLINE void make_users_ready(block_sched_env_t *env, ir_node *irn)
+static void make_users_ready(block_sched_env_t *env, ir_node *irn)
{
const ir_edge_t *edge;
+ /* make all data users ready */
foreach_out_edge(irn, edge) {
ir_node *user = get_edge_src_irn(edge);
+
if (! is_Phi(user))
make_ready(env, irn, user);
}
+ /* and the dependent nodes as well */
foreach_out_edge_kind(irn, edge, EDGE_KIND_DEP) {
ir_node *user = get_edge_src_irn(edge);
+
if (! is_Phi(user))
make_ready(env, irn, user);
}
ir_node *proj = get_edge_src_irn(edge);
ir_mode *mode = get_irn_mode(proj);
- if (mode == mode_T)
+ if (mode == mode_T) {
sum += get_num_successors(proj);
- else if (mode_is_datab(mode))
+ } else if (mode_is_datab(mode)) {
sum += get_irn_n_edges(proj);
+ }
}
}
else {
/**
* Adds irn to @p live, updates all inputs that this user is scheduled
- * and counts all of it's non scheduled users.
+ * and counts all of its non scheduled users.
*/
static void update_sched_liveness(block_sched_env_t *env, ir_node *irn) {
int i;
ir_node *in = get_irn_in_or_dep(irn, i);
/* if in is a proj: update predecessor */
- while (is_Proj(in))
- in = get_Proj_pred(in);
+ in = skip_Proj(in);
/* if in is still in the live set: reduce number of users by one */
- if (nodeset_find(env->live, in)) {
+ if (ir_nodeset_contains(&env->live, in)) {
if (add_irn_not_sched_user(env, in, -1) <= 0)
- nodeset_remove(env->live, in);
+ ir_nodeset_remove(&env->live, in);
}
}
i = get_num_successors(irn);
if (i > 0) {
set_irn_not_sched_user(env, irn, i);
- nodeset_insert(env->live, irn);
+ ir_nodeset_insert(&env->live, irn);
}
}
-static INLINE int must_appear_in_schedule(const list_sched_selector_t *sel, void *block_env, const ir_node *irn)
-{
- int res = -1;
-
- if (get_irn_n_edges(irn) < 1)
- return 0;
-
- if (sel->to_appear_in_schedule)
- res = sel->to_appear_in_schedule(block_env, irn);
-
- return res >= 0 ? res : ((to_appear_in_schedule(irn) || BE_SCHED_NODE(irn)) && ! is_Unknown(irn));
-}
-
/**
* Append an instruction to a schedule.
* @param env The block scheduling environment.
* @param irn The node to add to the schedule.
* @return The given node.
*/
-static ir_node *add_to_sched(block_sched_env_t *env, ir_node *irn)
+static void add_to_sched(block_sched_env_t *env, ir_node *irn)
{
/* If the node consumes/produces data, it is appended to the schedule
* list, otherwise, it is not put into the list */
if (must_appear_in_schedule(env->selector, env->selector_block_env, irn)) {
update_sched_liveness(env, irn);
- sched_add_before(env->block, irn);
+ sched_add_before(env->block, irn);
- DBG((env->dbg, LEVEL_2, "\tadding %+F\n", irn));
+ DBG((dbg, LEVEL_2, "\tadding %+F\n", irn));
+
+ /* Remove the node from the ready set */
+ ir_nodeset_remove(&env->cands, irn);
}
/* notify the selector about the finally selected node. */
if (env->selector->node_selected)
env->selector->node_selected(env->selector_block_env, irn);
- /* Insert the node in the set of all already scheduled nodes. */
- mark_already_scheduled(env, irn);
-
- /* Remove the node from the ready set */
- if(nodeset_find(env->cands, irn))
- nodeset_remove(env->cands, irn);
+ /* Insert the node in the set of all available scheduled nodes. */
+ set_already_scheduled(env, irn);
- return irn;
-}
-
-/**
- * Add the proj nodes of a tuple-mode irn to the schedule immediately
- * after the tuple-moded irn. By pinning the projs after the irn, no
- * other nodes can create a new lifetime between the tuple-moded irn and
- * one of its projs. This should render a realistic image of a
- * tuple-moded irn, which in fact models a node which defines multiple
- * values.
- *
- * @param irn The tuple-moded irn.
- */
-static void add_tuple_projs(block_sched_env_t *env, ir_node *irn)
-{
- const ir_edge_t *edge;
-
- assert(get_irn_mode(irn) == mode_T && "Mode of node must be tuple");
-
- if (is_Bad(irn))
- return;
-
-
- /* non-proj nodes can have dependency edges to tuple nodes. */
- foreach_out_edge_kind(irn, edge, EDGE_KIND_DEP) {
- ir_node *out = get_edge_src_irn(edge);
- make_ready(env, irn, out);
- }
-
- /* schedule the normal projs */
- foreach_out_edge(irn, edge) {
- ir_node *out = get_edge_src_irn(edge);
-
- assert(is_Proj(out) && "successor of a modeT node must be a proj");
-
- if (get_irn_mode(out) == mode_T)
- add_tuple_projs(env, out);
- else {
- add_to_sched(env, out);
- make_users_ready(env, out);
- }
- }
+ make_users_ready(env, irn);
}
/**
/* Initialize the block scheduling environment */
be.sched_info = env->sched_info;
be.block = block;
- be.cands = new_nodeset(get_irn_n_edges(block));
- be.live = new_nodeset(get_irn_n_edges(block));
+ ir_nodeset_init_size(&be.cands, get_irn_n_edges(block));
+ ir_nodeset_init_size(&be.live, get_irn_n_edges(block));
be.selector = selector;
be.sched_env = env;
- FIRM_DBG_REGISTER(be.dbg, "firm.be.sched");
- DBG((be.dbg, LEVEL_1, "scheduling %+F\n", block));
+ DBG((dbg, LEVEL_1, "scheduling %+F\n", block));
if (selector->init_block)
be.selector_block_env = selector->init_block(env->selector_env, block);
/* Then one can add all nodes are ready to the set. */
foreach_out_edge(block, edge) {
- ir_node *irn = get_edge_src_irn(edge);
+ ir_node *irn = get_edge_src_irn(edge);
+ ir_opcode code = get_irn_opcode(irn);
+ int users;
- /* Skip the end node because of keepalive edges. */
- if (get_irn_opcode(irn) == iro_End)
+ if (code == iro_End) {
+ /* Skip the end node because of keep-alive edges. */
+ continue;
+ } else if (code == iro_Block) {
+ /* A Block-Block edge. This should be the MacroBlock
+ * edge, ignore it. */
+ assert(get_Block_MacroBlock(irn) == block && "Block-Block edge found");
continue;
+ }
- if (get_irn_n_edges(irn) == 0)
+ users = get_irn_n_edges(irn);
+ if (users == 0)
continue;
+ else if (users == 1) { /* ignore nodes that are only hold by the anchor */
+ const ir_edge_t *edge = get_irn_out_edge_first_kind(irn, EDGE_KIND_NORMAL);
+ ir_node *user = get_edge_src_irn(edge);
+ if (is_Anchor(user))
+ continue;
+ }
if (is_Phi(irn)) {
/*
transfer data flow from the predecessors to this block.
*/
add_to_sched(&be, irn);
- make_users_ready(&be, irn);
}
else if (irn == start_node) {
/* The start block will be scheduled as the first node */
add_to_sched(&be, irn);
- add_tuple_projs(&be, irn);
}
else {
/* Other nodes must have all operands in other blocks to be made
- * ready */
+ * ready */
int ready = 1;
/* Check, if the operands of a node are not local to this block */
if (get_nodes_block(operand) == block) {
ready = 0;
break;
- }
- else {
+ } else {
/* live in values increase register pressure */
- update_sched_liveness(&be, operand);
+ ir_nodeset_insert(&be.live, operand);
}
}
/* Make the node ready, if all operands live in a foreign block */
if (ready) {
- DBG((be.dbg, LEVEL_2, "\timmediately ready: %+F\n", irn));
+ DBG((dbg, LEVEL_2, "\timmediately ready: %+F\n", irn));
make_ready(&be, NULL, irn);
}
}
}
/* Iterate over all remaining nodes */
- while (nodeset_count(be.cands) > 0) {
+ while (ir_nodeset_size(&be.cands) > 0) {
+ ir_nodeset_iterator_t iter;
/* collect statistics about amount of ready nodes */
- be_do_stat_sched_ready(block, be.cands);
+ be_do_stat_sched_ready(block, &be.cands);
- /* Keeps must be scheduled immediatly */
- foreach_nodeset(be.cands, irn) {
+ /* Keeps must be scheduled immediately */
+ foreach_ir_nodeset(&be.cands, irn, iter) {
if (be_is_Keep(irn) || be_is_CopyKeep(irn) || is_Sync(irn)) {
- nodeset_break(be.cands);
break;
}
}
if (! irn) {
/* Keeps must be immediately scheduled */
- irn = be.selector->select(be.selector_block_env, be.cands, be.live);
+ irn = be.selector->select(be.selector_block_env, &be.cands, &be.live);
}
- DB((be.dbg, LEVEL_2, "\tpicked node %+F\n", irn));
+ DB((dbg, LEVEL_2, "\tpicked node %+F\n", irn));
/* Add the node to the schedule. */
add_to_sched(&be, irn);
- if (get_irn_mode(irn) == mode_T)
- add_tuple_projs(&be, irn);
- else
- make_users_ready(&be, irn);
-
/* remove the scheduled node from the ready list. */
- if (nodeset_find(be.cands, irn))
- nodeset_remove(be.cands, irn);
+ ir_nodeset_remove(&be.cands, irn);
}
if (selector->finish_block)
selector->finish_block(be.selector_block_env);
- del_nodeset(be.cands);
- del_nodeset(be.live);
+ ir_nodeset_destroy(&be.cands);
+ ir_nodeset_destroy(&be.live);
}
/* List schedule a graph. */
-void list_sched(const be_irg_t *birg, be_options_t *be_opts)
+void list_sched(be_irg_t *birg, be_options_t *be_opts)
{
const arch_env_t *arch_env = birg->main_env->arch_env;
ir_graph *irg = birg->irg;
mris_env_t *mris = NULL;
list_sched_selector_t sel;
+ (void)be_opts;
+
/* Select a scheduler based on backend options */
switch (list_sched_options.select) {
- case BE_SCHED_SELECT_TRIVIAL:
- memcpy(&sel, trivial_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_RANDOM:
- memcpy(&sel, random_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_REGPRESS:
- memcpy(&sel, reg_pressure_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_MUCHNIK:
- memcpy(&sel, muchnik_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_HEUR:
- memcpy(&sel, heuristic_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_HMUCHNIK:
+ case BE_SCHED_SELECT_TRIVIAL: sel = trivial_selector; break;
+ case BE_SCHED_SELECT_RANDOM: sel = random_selector; break;
+ case BE_SCHED_SELECT_REGPRESS: sel = reg_pressure_selector; break;
+ case BE_SCHED_SELECT_MUCHNIK: sel = muchnik_selector; break;
+ case BE_SCHED_SELECT_HEUR: sel = heuristic_selector; break;
+ case BE_SCHED_SELECT_NORMAL: sel = normal_selector; break;
default:
- memcpy(&sel, trivial_selector, sizeof(sel));
+ case BE_SCHED_SELECT_HMUCHNIK: sel = trivial_selector; break;
}
- /* Assure, that the out edges are computed */
+#if 1
+ /* Matze: This is very slow, we should avoid it to improve backend speed,
+ * we just have to make sure that we have no dangling out-edges at this
+ * point...
+ */
+
+ /* Assure, that we have no dangling out-edges to deleted stuff */
edges_deactivate(birg->irg);
edges_activate(birg->irg);
+#endif
switch (list_sched_options.prep) {
case BE_SCHED_PREP_MRIS:
/* initialize environment for list scheduler */
memset(&env, 0, sizeof(env));
- env.selector = arch_env->isa->impl->get_list_sched_selector(arch_env->isa, &sel);
+ env.selector = arch_env_get_list_sched_selector(arch_env, &sel);
env.arch_env = arch_env;
env.irg = irg;
env.sched_info = NEW_ARR_F(sched_irn_t, num_nodes);
memset(env.sched_info, 0, num_nodes * sizeof(env.sched_info[0]));
if (env.selector->init_graph)
- env.selector_env = env.selector->init_graph(env.selector, arch_env, irg);
+ env.selector_env = env.selector->init_graph(env.selector, birg);
/* Schedule each single block. */
irg_block_walk_graph(irg, list_sched_block, NULL, &env);
}
/* List schedule a block. */
-void list_sched_single_block(const be_irg_t *birg, ir_node *block, be_options_t *be_opts)
+void list_sched_single_block(const be_irg_t *birg, ir_node *block,
+ be_options_t *be_opts)
{
const arch_env_t *arch_env = birg->main_env->arch_env;
ir_graph *irg = birg->irg;
sched_env_t env;
list_sched_selector_t sel;
+ (void)be_opts;
+
/* Select a scheduler based on backend options */
switch (list_sched_options.select) {
- case BE_SCHED_SELECT_TRIVIAL:
- memcpy(&sel, trivial_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_RANDOM:
- memcpy(&sel, random_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_REGPRESS:
- memcpy(&sel, reg_pressure_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_MUCHNIK:
- memcpy(&sel, muchnik_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_HEUR:
- memcpy(&sel, heuristic_selector, sizeof(sel));
- break;
- case BE_SCHED_SELECT_HMUCHNIK:
+ case BE_SCHED_SELECT_TRIVIAL: sel = trivial_selector; break;
+ case BE_SCHED_SELECT_RANDOM: sel = random_selector; break;
+ case BE_SCHED_SELECT_REGPRESS: sel = reg_pressure_selector; break;
+ case BE_SCHED_SELECT_MUCHNIK: sel = muchnik_selector; break;
+ case BE_SCHED_SELECT_HEUR: sel = heuristic_selector; break;
+ case BE_SCHED_SELECT_NORMAL: sel = normal_selector; break;
default:
- memcpy(&sel, trivial_selector, sizeof(sel));
+ case BE_SCHED_SELECT_HMUCHNIK: sel = trivial_selector; break;
}
/* Assure, that the out edges are computed */
/* initialize environment for list scheduler */
memset(&env, 0, sizeof(env));
- env.selector = arch_env->isa->impl->get_list_sched_selector(arch_env->isa, &sel);
+ env.selector = arch_env_get_list_sched_selector(arch_env, &sel);
env.arch_env = arch_env;
env.irg = irg;
env.sched_info = NEW_ARR_F(sched_irn_t, num_nodes);
memset(env.sched_info, 0, num_nodes * sizeof(env.sched_info[0]));
if (env.selector->init_graph)
- env.selector_env = env.selector->init_graph(env.selector, arch_env, irg);
+ env.selector_env = env.selector->init_graph(env.selector, birg);
/* Schedule block. */
list_sched_block(block, &env);
lc_opt_entry_t *sched_grp = lc_opt_get_grp(be_grp, "listsched");
lc_opt_add_table(sched_grp, list_sched_option_table);
+
+ FIRM_DBG_REGISTER(dbg, "firm.be.sched");
}
BE_REGISTER_MODULE_CONSTRUCTOR(be_init_listsched);
projects / libfirm / blobdiff