typedef struct _ilpsched_options_t {
unsigned regpress;
- unsigned limit_dead;
unsigned time_limit;
char log_file[1024];
} ilpsched_options_t;
typedef struct _ilp_var_types_t {
int *x; /* x_{nt}^k variables */
int *a; /* a_{nt}^k variables */
- int *d; /* d_{nt}^k variables */
int *y; /* y_{nt}^k variables */
} ilp_var_types_t;
unsigned is_dummy_node : 1; /**< this node is assigned to DUMMY unit */
bitset_t *transitive_block_nodes; /**< Set of transitive block nodes (predecessors
for ASAP, successors for ALAP */
- unsigned n_unit_types; /**< number of allowed execution unit types */
+ unsigned n_unit_types; /**< number of allowed execution unit types */
unit_type_info_t *type_info; /**< list of allowed execution unit types */
ilp_var_types_t ilp_vars; /**< the different ILP variables */
} ilpsched_node_attr_t;
/* option variable */
static ilpsched_options_t ilp_opts = {
1, /* default is with register pressure constraints */
- 120, /* if we have more than 70 nodes: use alive nodes constraint */
300, /* 300 sec per block time limit */
"" /* no log file */
};
/* ILP options */
static const lc_opt_table_entry_t ilpsched_option_table[] = {
LC_OPT_ENT_BOOL("regpress", "Use register pressure constraints", &ilp_opts.regpress),
- LC_OPT_ENT_INT("limit_dead", "Upto how many nodes the dead node constraint should be used", &ilp_opts.limit_dead),
LC_OPT_ENT_INT("time_limit", "ILP time limit per block", &ilp_opts.time_limit),
LC_OPT_ENT_STR("lpp_log", "LPP logfile (stderr and stdout are supported)", ilp_opts.log_file, sizeof(ilp_opts.log_file)),
{ NULL }
* node n is scheduled at time step t to unit type k
* ==>> These variables represent the schedule
*
- * - d_{nt}^k binary weighted with: t
- * node n dies at time step t on unit type k
* - a_{nt}^k binary weighted with num_nodes
* node n is alive at time step t on unit type k
*
- * - y_{nt}^k binary weighted with: num_nodes^2
- * node n is scheduled at time step t to unit type k
- * although all units of this type are occupied
+ * - y_{nt}^k continuous weighted with: num_nodes^2
+ * register pressure over limit for unit type k
* ==>> These variables represent the register pressure
*
*/
na->ilp_vars.y = NEW_ARR_D(int, var_obst, n_unit_types * VALID_SCHED_INTERVAL(na));
memset(na->ilp_vars.y, -1, ARR_LEN(na->ilp_vars.y) * sizeof(na->ilp_vars.y[0]));
- num_ad = ba->max_steps - na->asap + 1;
-
- if (ba->n_interesting_nodes > env->opts->limit_dead) {
- na->ilp_vars.a = NEW_ARR_D(int, var_obst, n_unit_types * num_ad);
- memset(na->ilp_vars.a, -1, ARR_LEN(na->ilp_vars.a) * sizeof(na->ilp_vars.a[0]));
- }
- else {
- na->ilp_vars.d = NEW_ARR_D(int, var_obst, n_unit_types * num_ad);
- memset(na->ilp_vars.d, -1, ARR_LEN(na->ilp_vars.d) * sizeof(na->ilp_vars.d[0]));
- }
+ num_ad = ba->max_steps - na->asap + 1;
+ na->ilp_vars.a = NEW_ARR_D(int, var_obst, n_unit_types * num_ad);
+ memset(na->ilp_vars.a, -1, ARR_LEN(na->ilp_vars.a) * sizeof(na->ilp_vars.a[0]));
}
DBG((env->dbg, LEVEL_3, "\thandling %+F (asap %u, alap %u, unit types %u):\n",
if (! na->is_dummy_node) {
for (t = na->asap - 1; t <= ba->max_steps; ++t) {
- if (ba->n_interesting_nodes > env->opts->limit_dead) {
- /* a_{nt}^k variables */
- snprintf(buf, sizeof(buf), "a_n%u_%s_%u",
- get_irn_idx(irn), na->type_info[tp_idx].tp->name, t);
- na->ilp_vars.a[cur_var_ad++] = lpp_add_var(lpp, buf, lpp_binary, (double)(ba->n_interesting_nodes));
- }
- else {
- /* d_{nt}^k variables */
- snprintf(buf, sizeof(buf), "d_n%u_%s_%u",
- get_irn_idx(irn), na->type_info[tp_idx].tp->name, t);
- na->ilp_vars.d[cur_var_ad++] = lpp_add_var(lpp, buf, lpp_binary, (double)(t + 1));
- }
+ /* a_{nt}^k variables */
+ snprintf(buf, sizeof(buf), "a_n%u_%s_%u",
+ get_irn_idx(irn), na->type_info[tp_idx].tp->name, t);
+ na->ilp_vars.a[cur_var_ad++] = lpp_add_var(lpp, buf, lpp_binary, (double)(ba->n_interesting_nodes));
DBG((env->dbg, LEVEL_4, "\t\tcreated ILP variable %s\n", buf));
/* variable counter */
ir_node *irn;
ilpsched_block_attr_t *ba = get_ilpsched_block_attr(block_node);
bitset_t *bs_block_irns = bitset_alloca(ba->block_last_idx);
- lc_timer_t *t_cst_assign = lc_timer_register("beilpsched_cst_assign", "create assignment constraints");
- lc_timer_t *t_cst_dead = lc_timer_register("beilpsched_cst_assign_dead", "create dead node assignment constraints");
- lc_timer_t *t_cst_prec = lc_timer_register("beilpsched_cst_prec", "create precedence constraints");
+ lc_timer_t *t_cst_assign = lc_timer_register("beilpsched_cst_assign", "create assignment constraints");
+ lc_timer_t *t_cst_prec = lc_timer_register("beilpsched_cst_prec", "create precedence constraints");
num_cst_assign = num_cst_prec = num_cst_dead = 0;
foreach_linked_irns(ba->head_ilp_nodes, irn) {
lpp_set_factor_fast_bulk(lpp, cst, na->ilp_vars.x, ARR_LEN(na->ilp_vars.x), 1.0);
ilp_timer_pop();
- /* the dead node assignment constraint */
- if (! na->is_dummy_node && ba->n_interesting_nodes <= env->opts->limit_dead) {
- ilp_timer_push(t_cst_dead);
- snprintf(buf, sizeof(buf), "dead_node_assign_cst_n%u", get_irn_idx(irn));
- cst = lpp_add_cst_uniq(lpp, buf, lpp_less, 1.0);
- DBG((env->dbg, LEVEL_2, "added constraint %s\n", buf));
-
- lpp_set_factor_fast_bulk(lpp, cst, na->ilp_vars.d, ARR_LEN(na->ilp_vars.d), 1.0);
- ilp_timer_pop();
- }
-
/* We have separate constraints for Projs and Keeps */
// ILP becomes infeasible ?!?
// if (is_Proj(irn) || be_is_Keep(irn))
num_cst_bundle, ilp_timer_elapsed_usec(t_cst_bundle) / 1000000.0));
}
-/**
- * Create ILP dying nodes constraints:
- * - set variable d_{nt}^k to 1 if nodes n dies at step t on unit k
- */
-static void create_dying_nodes_constraint(be_ilpsched_env_t *env, lpp_t *lpp, be_ilpsched_irn_t *block_node) {
- char buf[1024];
- unsigned t;
- unsigned num_cst = 0;
- ilpsched_block_attr_t *ba = get_ilpsched_block_attr(block_node);
- lc_timer_t *t_cst = lc_timer_register("beilpsched_cst_dying_nodes", "create dying nodes constraints");
-
- ilp_timer_push(t_cst);
- /* check all time_steps */
- for (t = 0; t < ba->max_steps; ++t) {
- ir_node *irn;
-
- /* for all nodes */
- foreach_linked_irns(ba->head_ilp_nodes, irn) {
- be_ilpsched_irn_t *node = get_ilpsched_irn(env, irn);
- ilpsched_node_attr_t *na = get_ilpsched_node_attr(node);
-
- /* if node has no consumer within current block, it cannot die here */
- /* we also ignore nodes assigned to dummy unit */
- if (ARR_LEN(na->block_consumer) < 1 || na->is_dummy_node)
- continue;
-
- /* node can only die here if t at least asap(n) */
- if (t >= na->asap - 1) {
- int node_tp_idx;
-
- /* for all unit types */
- for (node_tp_idx = na->n_unit_types - 1; node_tp_idx >= 0; --node_tp_idx) {
- int tp_idx, i, cst;
- int *tmp_var_idx = NEW_ARR_F(int, 0);
-
- snprintf(buf, sizeof(buf), "dying_node_cst_%u_n%u", t, get_irn_idx(irn));
- cst = lpp_add_cst_uniq(lpp, buf, lpp_less, (double)(na->n_consumer - 1));
- DBG((env->dbg, LEVEL_2, "added constraint %s\n", buf));
- num_cst++;
-
- /* number of consumer scheduled till t */
- for (i = ARR_LEN(na->block_consumer) - 1; i >= 0; --i) {
- be_ilpsched_irn_t *cons = get_ilpsched_irn(env, na->block_consumer[i]);
- ilpsched_node_attr_t *ca = get_ilpsched_node_attr(cons);
-
- for (tp_idx = ca->n_unit_types - 1; tp_idx >= 0; --tp_idx) {
- unsigned tm;
-
- for (tm = ca->asap - 1; tm <= t && tm <= ca->alap - 1; ++tm) {
- int idx = ILPVAR_IDX(ca, tp_idx, tm);
- ARR_APP1(int, tmp_var_idx, ca->ilp_vars.x[idx]);
- }
- }
- }
-
- /* could be that no consumer can be scheduled at this point */
- if (ARR_LEN(tmp_var_idx)) {
- int idx;
- unsigned tn;
-
- /* subtract possible prior kill points */
- for (tn = na->asap - 1; tn < t; ++tn) {
- idx = ILPVAR_IDX_DEAD(ba, na, node_tp_idx, tn);
- lpp_set_factor_fast(lpp, cst, na->ilp_vars.d[idx], -1.0);
- }
-
- idx = ILPVAR_IDX_DEAD(ba, na, node_tp_idx, t);
- lpp_set_factor_fast(lpp, cst, na->ilp_vars.d[idx], 0.0 - (double)(na->n_consumer));
- lpp_set_factor_fast_bulk(lpp, cst, tmp_var_idx, ARR_LEN(tmp_var_idx), 1.0);
- }
-
- DEL_ARR_F(tmp_var_idx);
- }
- }
-
- }
- }
- ilp_timer_pop();
- DBG((env->dbg, LEVEL_1, "\t%u dying nodes constraints (%g sec)\n",
- num_cst, ilp_timer_elapsed_usec(t_cst) / 1000000.0));
-}
-
/**
* Create ILP alive nodes constraints:
* - set variable a_{nt}^k to 1 if nodes n is alive at step t on unit k
num_cst, ilp_timer_elapsed_usec(t_cst) / 1000000.0));
}
-/**
- * Create ILP pressure constraints, based on dead nodes:
- * - add additional costs to objective function if a node is scheduled
- * on a unit although all units of this type are currently occupied
- */
-static void create_pressure_dead_constraint(be_ilpsched_env_t *env, lpp_t *lpp, be_ilpsched_irn_t *block_node) {
- char buf[1024];
- ir_node *cur_irn;
- unsigned num_cst = 0;
- ilpsched_block_attr_t *ba = get_ilpsched_block_attr(block_node);
- lc_timer_t *t_cst = lc_timer_register("beilpsched_cst_pressure", "create pressure constraints");
-
- ilp_timer_push(t_cst);
- /* y_{nt}^k is set for each node and timestep and unit type */
- foreach_linked_irns(ba->head_ilp_nodes, cur_irn) {
- unsigned cur_idx = get_irn_idx(cur_irn);
- be_ilpsched_irn_t *cur_node = get_ilpsched_irn(env, cur_irn);
- ilpsched_node_attr_t *cur_na = get_ilpsched_node_attr(cur_node);
- int glob_type_idx;
-
- /* we ignore nodes assigned to DUMMY unit here */
- if (cur_na->is_dummy_node)
- continue;
-
- /* for all types */
- for (glob_type_idx = env->cpu->n_unit_types - 1; glob_type_idx >= 0; --glob_type_idx) {
- be_execution_unit_type_t *cur_tp = &env->cpu->unit_types[glob_type_idx];
- int cur_tp_idx;
- unsigned t;
-
- /* BEWARE: the DUMMY unit types is not in CPU, so it's skipped automatically */
-
- /* check if node can be executed on this unit type */
- cur_tp_idx = is_valid_unit_type_for_node(cur_tp, cur_node);
- if (cur_tp_idx < 0)
- continue;
-
- /* check all time_steps */
- for (t = cur_na->asap - 1; t <= cur_na->alap - 1; ++t) {
- int cst, y_idx;
- ir_node *irn;
- int *tmp_idx_1 = NEW_ARR_F(int, 0);
- int *tmp_idx_m1 = NEW_ARR_F(int, 0);
-
- snprintf(buf, sizeof(buf), "pressure_cst_n%u_%u_%s", cur_idx, t, cur_tp->name);
- cst = lpp_add_cst_uniq(lpp, buf, lpp_less, (double)(cur_tp->n_units - 1));
- DBG((env->dbg, LEVEL_2, "added constraint %s\n", buf));
- num_cst++;
-
- /*
- - accumulate all nodes scheduled on unit type k till t
- - subtract all nodes died on unit type k till t
- */
- foreach_linked_irns(ba->head_ilp_nodes, irn) {
- be_ilpsched_irn_t *node = get_ilpsched_irn(env, irn);
- ilpsched_node_attr_t *na = get_ilpsched_node_attr(node);
- unsigned tn, tmax;
- int tp_idx;
-
- tmax = MIN(t, na->alap - 1);
- tp_idx = is_valid_unit_type_for_node(cur_tp, node);
-
- /* current unit type is not suitable for current node */
- if (tp_idx < 0)
- continue;
-
- for (tn = na->asap - 1; tn <= tmax; ++tn) {
- int idx;
-
- /* node scheduled */
- idx = ILPVAR_IDX(na, tp_idx, tn);
- ARR_APP1(int, tmp_idx_1, na->ilp_vars.x[idx]);
-
- /* node dead */
- idx = ILPVAR_IDX_DEAD(ba, na, tp_idx, tn);
- ARR_APP1(int, tmp_idx_m1, na->ilp_vars.d[idx]);
- }
- }
-
- if (ARR_LEN(tmp_idx_1) > 0)
- lpp_set_factor_fast_bulk(lpp, cst, tmp_idx_1, ARR_LEN(tmp_idx_1), 1.0);
-
- if (ARR_LEN(tmp_idx_m1) > 0)
- lpp_set_factor_fast_bulk(lpp, cst, tmp_idx_m1, ARR_LEN(tmp_idx_m1), -1.0);
-
- /* BEWARE: t is unsigned, so (double)(-t) won't work */
- y_idx = ILPVAR_IDX(cur_na, cur_tp_idx, t);
- lpp_set_factor_fast(lpp, cst, cur_na->ilp_vars.y[y_idx], -1.0);
-
- DEL_ARR_F(tmp_idx_1);
- DEL_ARR_F(tmp_idx_m1);
- }
- }
- }
- ilp_timer_pop();
- DBG((env->dbg, LEVEL_1, "\t%u pressure constraints (%g sec)\n",
- num_cst, ilp_timer_elapsed_usec(t_cst) / 1000000.0));
-}
-
/**
* Create ILP pressure constraints, based on alive nodes:
* - add additional costs to objective function if a node is scheduled
//create_proj_keep_constraints(env, lpp, block_node);
if (env->opts->regpress) {
- if (ba->n_interesting_nodes > env->opts->limit_dead) {
- create_alive_nodes_constraint(env, lpp, block_node);
- create_alive_livein_nodes_constraint(env, lpp, block_node);
- create_pressure_alive_constraint(env, lpp, block_node);
- } else {
- create_dying_nodes_constraint(env, lpp, block_node);
- create_pressure_dead_constraint(env, lpp, block_node);
- }
+ create_alive_nodes_constraint(env, lpp, block_node);
+ create_alive_livein_nodes_constraint(env, lpp, block_node);
+ create_pressure_alive_constraint(env, lpp, block_node);
}
DBG((env->dbg, LEVEL_1, "ILP to solve: %u variables, %u constraints\n", lpp->var_next, lpp->cst_next));
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