* @date 20.10.2004
* @author Sebastian Hack
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include <stdio.h>
#include <stdarg.h>
*/
typedef struct _sched_env_t {
const ir_graph *irg; /**< The graph to schedule. */
- list_sched_selector_t *select; /**< The node selector. */
- void *select_env; /**< A pointer to give to the selector. */
+ const list_sched_selector_t *selector; /**< The node selector. */
+ void *selector_env; /**< A pointer to give to the selector. */
} sched_env_t;
-ir_node *trivial_selector(void *env, ir_node *block, int curr_time,
- pset *already_scheduled, pset *ready_list)
+static ir_node *trivial_select(void *env, void *block_env, const struct list_head *sched_head,
+ int curr_time, pset *ready_set)
{
- ir_node *res = pset_first(ready_list);
- pset_break(ready_list);
+ ir_node *res = pset_first(ready_set);
+ pset_break(ready_set);
return res;
}
+static const list_sched_selector_t trivial_selector_struct = {
+ NULL,
+ NULL,
+ trivial_select,
+ NULL,
+ NULL
+};
+
+const list_sched_selector_t *trivial_selector = &trivial_selector_struct;
+
static void list_sched_block(ir_node *block, void *env_ptr);
-void list_sched(ir_graph *irg, list_sched_selector_t *selector, void *select_env)
+void list_sched(ir_graph *irg, const list_sched_selector_t *selector)
{
sched_env_t env;
memset(&env, 0, sizeof(env));
- env.select = selector;
- env.select_env = select_env;
+ env.selector = selector;
+ env.selector_env = selector->init_graph ? selector->init_graph(irg) : NULL;
env.irg = irg;
/* Normalize proj nodes. */
compute_outs(irg);
/* Dump the graph. */
- dump_ir_block_graph(irg, "-before-sched");
+ //dump_ir_block_graph(irg, "-before-sched");
/* Schedule each single block. */
irg_block_walk_graph(irg, list_sched_block, NULL, &env);
+
+ if(selector->finish_graph)
+ selector->finish_graph(env.selector_env, irg);
}
-/**
- * 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(ir_node *irn)
-{
- int i, n;
-
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
- if(mode_is_datab(get_irn_mode(op)))
- return 1;
- }
-
- return mode_is_datab(get_irn_mode(irn));
-}
-
/**
* Try to put a node in the ready set.
return 0;
}
- DBG((env->dbg, LEVEL_2, "\tmaking ready: %n\n", irn));
+ DBG((env->dbg, LEVEL_2, "\tmaking ready: %+F\n", irn));
pset_insert_ptr(env->ready_set, irn);
return 1;
if(to_appear_in_schedule(irn)) {
sched_info_t *info = get_irn_sched_info(irn);
INIT_LIST_HEAD(&info->list);
- sched_add(env->block, irn);
+ info->scheduled = 1;
+ sched_add_before(env->block, irn);
- DBG((env->dbg, LEVEL_2, "\tadding %n\n", irn));
+ DBG((env->dbg, LEVEL_2, "\tadding %+F\n", irn));
}
/* Insert the node in the set of all already scheduled nodes. */
*/
static void list_sched_block(ir_node *block, void *env_ptr)
{
- sched_env_t *env = env_ptr;
- block_sched_env_t be;
-
- ir_node *irn;
- int j, m;
- int phi_seen = 0;
- sched_info_t *info = get_irn_sched_info(block);
-
- /* Initialize the block's list head that will hold the schedule. */
- INIT_LIST_HEAD(&info->list);
-
- /* Initialize the block scheduling environment */
- be.dbg = firm_dbg_register("firm.be.sched");
- be.block = block;
- be.curr_time = 0;
- be.ready_set = new_pset(node_cmp_func, get_irn_n_outs(block));
- be.already_scheduled = new_pset(node_cmp_func, get_irn_n_outs(block));
-
- DBG((be.dbg, LEVEL_1, "scheduling %n\n", block));
-
- /* Then one can add all nodes are ready to the set. */
- int i;
- int n;
- for(i = 0, n = get_irn_n_outs(block); i < n; ++i) {
- ir_node *irn = get_irn_out(block, i);
-
- /* Skip the end node because of keepalive edges. */
- if(get_irn_opcode(irn) == iro_End)
- continue;
-
- /* Phi functions are scheduled immediately, since they only transfer
- * data flow from the predecessors to this block. */
- if(is_Phi(irn)) {
- add_to_sched(&be, irn);
- make_users_ready(&be, irn);
- phi_seen = 1;
- }
-
- /* Other nodes must have all operands in other blocks to be made
- * ready */
- else {
- bool ready = true;
-
- /* Check, if the operands of a node are not local to this block */
- for(j = 0, m = get_irn_arity(irn); j < m; ++j) {
- ir_node *operand = get_irn_n(irn, j);
-
- if(get_nodes_block(operand) == block) {
- ready = false;
- break;
- }
- }
-
- /* Make the node ready, if all operands live in a foreign block */
- if(ready) {
- DBG((be.dbg, LEVEL_2, "\timmediately ready: %n\n", irn));
- make_ready(&be, irn);
- }
- }
- }
-
- /* Increase the time, if some phi functions have been scheduled */
- be.curr_time += phi_seen;
-
- while(pset_count(be.ready_set) > 0) {
- DBG((be.dbg, LEVEL_2, "\tready set: %*n\n", pset_iterator, be.ready_set));
- // pset_print(stdout, be.ready_set, irn_printer);
-
- /* select a node to be scheduled and check if it was ready */
- irn = env->select(env->select_env, block, be.curr_time,
- be.already_scheduled, be.ready_set);
-
- DBG((be.dbg, LEVEL_3, "\tpicked node %n\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);
-
- /* Increase the time step. */
- be.curr_time += 1;
-
- /* remove the scheduled node from the ready list. */
- if(pset_find_ptr(be.ready_set, irn))
- pset_remove_ptr(be.ready_set, irn);
- }
-
- del_pset(be.ready_set);
- del_pset(be.already_scheduled);
+ void *block_env = NULL;
+ sched_env_t *env = env_ptr;
+ block_sched_env_t be;
+ const list_sched_selector_t *selector = env->selector;
+
+ ir_node *irn;
+ int i, n, j, m;
+ int phi_seen = 0;
+ sched_info_t *info = get_irn_sched_info(block);
+
+ /* Initialize the block's list head that will hold the schedule. */
+ INIT_LIST_HEAD(&info->list);
+
+ /* Initialize the block scheduling environment */
+ be.dbg = firm_dbg_register("firm.be.sched");
+ be.block = block;
+ be.curr_time = 0;
+ be.ready_set = new_pset(node_cmp_func, get_irn_n_outs(block));
+ be.already_scheduled = new_pset(node_cmp_func, get_irn_n_outs(block));
+
+ firm_dbg_set_mask(be.dbg, 0);
+
+ if(selector->init_block)
+ block_env = selector->init_block(env->selector_env, block);
+
+ DBG((be.dbg, LEVEL_1, "scheduling %+F\n", block));
+
+ /* Then one can add all nodes are ready to the set. */
+ for(i = 0, n = get_irn_n_outs(block); i < n; ++i) {
+ ir_node *irn = get_irn_out(block, i);
+
+ /* Skip the end node because of keepalive edges. */
+ if(get_irn_opcode(irn) == iro_End)
+ continue;
+
+ /* Phi functions are scheduled immediately, since they only transfer
+ * data flow from the predecessors to this block. */
+ if(is_Phi(irn)) {
+ add_to_sched(&be, irn);
+ make_users_ready(&be, irn);
+ phi_seen = 1;
+ }
+
+ /* Other nodes must have all operands in other blocks to be made
+ * ready */
+ else {
+ bool ready = true;
+
+ /* Check, if the operands of a node are not local to this block */
+ for(j = 0, m = get_irn_arity(irn); j < m; ++j) {
+ ir_node *operand = get_irn_n(irn, j);
+
+ if(get_nodes_block(operand) == block) {
+ ready = false;
+ break;
+ }
+ }
+
+ /* Make the node ready, if all operands live in a foreign block */
+ if(ready) {
+ DBG((be.dbg, LEVEL_2, "\timmediately ready: %+F\n", irn));
+ make_ready(&be, irn);
+ }
+ }
+ }
+
+ /* Increase the time, if some phi functions have been scheduled */
+ be.curr_time += phi_seen;
+
+ while(pset_count(be.ready_set) > 0) {
+ // DBG((be.dbg, LEVEL_2, "\tready set: %*n\n", pset_iterator, be.ready_set));
+
+ /* select a node to be scheduled and check if it was ready */
+ irn = selector->select(env->selector_env, block_env, &info->list, be.curr_time, be.ready_set);
+
+ DBG((be.dbg, LEVEL_3, "\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);
+
+ /* Increase the time step. */
+ be.curr_time += 1;
+
+ /* remove the scheduled node from the ready list. */
+ if(pset_find_ptr(be.ready_set, irn))
+ pset_remove_ptr(be.ready_set, irn);
+ }
+
+ if(selector->finish_block)
+ selector->finish_block(env->selector_env, block_env, block);
+
+ del_pset(be.ready_set);
+ del_pset(be.already_scheduled);
}
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