X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeilpsched.c;h=b507a5a39f96eb9756f9cbce50d2c60b51584f10;hb=156465e36d6104585cfabe492e20d53f12555efa;hp=d90d3f98093507991a70b755d590a371bf38a442;hpb=3ca4bea72017632432954e08b9d5c997bef45f77;p=libfirm diff --git a/ir/be/beilpsched.c b/ir/be/beilpsched.c index d90d3f980..b507a5a39 100644 --- a/ir/be/beilpsched.c +++ b/ir/be/beilpsched.c @@ -31,6 +31,7 @@ #include "irtools.h" #include "irdump.h" #include "plist.h" +#include "irprintf.h" #include #include @@ -44,10 +45,10 @@ #include "besched_t.h" #include "beilpsched.h" #include "beutil.h" +#include "bestat.h" typedef struct _ilpsched_options_t { unsigned regpress; - unsigned limit_dead; unsigned time_limit; char log_file[1024]; } ilpsched_options_t; @@ -63,7 +64,6 @@ typedef struct _unit_type_info_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; @@ -92,7 +92,7 @@ typedef struct _ilpsched_node_attr_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; @@ -130,6 +130,8 @@ typedef struct { const be_main_env_t *main_env; const be_machine_t *cpu; /**< the current abstract machine */ ilpsched_options_t *opts; /**< the ilp options for current irg */ + const be_irg_t *birg; /**< The birg object */ + be_options_t *be_opts; /**< backend options */ const ilp_sched_selector_t *sel; /**< The ILP sched selector provided by the backend */ DEBUG_ONLY(firm_dbg_module_t *dbg); } be_ilpsched_env_t; @@ -174,7 +176,6 @@ typedef struct { /* 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 */ }; @@ -182,7 +183,6 @@ static ilpsched_options_t ilp_opts = { /* 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 } @@ -314,6 +314,7 @@ static void build_block_idx(ir_node *irn, void *walk_env) { ilpsched_node_attr_t *na; ilpsched_block_attr_t *ba; + set_irn_link(irn, NULL); if (! consider_for_sched(env->arch_env->isa, irn)) return; @@ -772,7 +773,7 @@ static void apply_solution(be_ilpsched_env_t *env, lpp_t *lpp, ir_node *block) { double cost = lpp_get_var_sol(lpp, na->ilp_vars.y[cur_var]); if (! LPP_VALUE_IS_0(cost)) { - ir_fprintf(stderr, "\t\t%+F has additional regpressure costs of %f\n", irn, cost); + DBG((env->dbg, LEVEL_3, "%+F has additional regpressure costs of %f\n", irn, cost)); found = 1; } } @@ -938,14 +939,11 @@ static unsigned be_ilpsched_get_max_alap_user(be_ilpsched_env_t *env, ir_node *i * 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 * */ @@ -980,16 +978,9 @@ static void create_variables(be_ilpsched_env_t *env, lpp_t *lpp, be_ilpsched_irn 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", @@ -1027,18 +1018,10 @@ static void create_variables(be_ilpsched_env_t *env, lpp_t *lpp, be_ilpsched_irn 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 */ @@ -1071,7 +1054,7 @@ static void create_variables(be_ilpsched_env_t *env, lpp_t *lpp, be_ilpsched_irn foreach_pset(ba->livein_nodes, livein) { be_ilpsched_irn_t *node; ilpsched_node_attr_t *na; - unsigned tp_idx, var_idx, max_alap; + unsigned tp_idx, var_idx; ir_node *irn; irn = livein->irn; @@ -1128,9 +1111,8 @@ static void create_assignment_and_precedence_constraints(be_ilpsched_env_t *env, 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) { @@ -1153,17 +1135,6 @@ static void create_assignment_and_precedence_constraints(be_ilpsched_env_t *env, 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)) @@ -1366,88 +1337,6 @@ static void create_bundle_constraints(be_ilpsched_env_t *env, lpp_t *lpp, be_ilp 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 @@ -1556,8 +1445,8 @@ static void create_alive_livein_nodes_constraint(be_ilpsched_env_t *env, lpp_t * /* for all unit types available for this node */ for (node_tp_idx = na->n_unit_types - 1; node_tp_idx >= 0; --node_tp_idx) { const ir_edge_t *edge; - unsigned tn, tn_max, idx; - int cst, i, num_block_user; + unsigned idx; + int cst, num_block_user; int *tmp_var_idx_m = NEW_ARR_F(int, 0); /* check the number of consumer scheduled so far */ @@ -1608,105 +1497,6 @@ static void create_alive_livein_nodes_constraint(be_ilpsched_env_t *env, lpp_t * 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 @@ -1999,6 +1789,7 @@ static void create_ilp(ir_node *block, void *walk_env) { ilpsched_block_attr_t *ba = get_ilpsched_block_attr(block_node); FILE *logfile = NULL; lpp_t *lpp = NULL; + int need_heur = 0; struct obstack var_obst; char name[1024]; @@ -2046,14 +1837,9 @@ static void create_ilp(ir_node *block, void *walk_env) { //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)); @@ -2102,15 +1888,20 @@ static void create_ilp(ir_node *block, void *walk_env) { char buf[1024]; FILE *f; - snprintf(buf, sizeof(buf), "lpp_block_%lu.assert.txt", get_irn_node_nr(block)); - f = fopen(buf, "w"); - lpp_dump_plain(lpp, f); - fclose(f); - snprintf(buf, sizeof(buf), "lpp_block_%lu.assert.mps", get_irn_node_nr(block)); - lpp_dump(lpp, buf); - dump_ir_block_graph(env->irg, "-assert"); + DEBUG_ONLY( + if (firm_dbg_get_mask(env->dbg) >= 2) { + snprintf(buf, sizeof(buf), "lpp_block_%lu.infeasible.txt", get_irn_node_nr(block)); + f = fopen(buf, "w"); + lpp_dump_plain(lpp, f); + fclose(f); + snprintf(buf, sizeof(buf), "lpp_block_%lu.infeasible.mps", get_irn_node_nr(block)); + lpp_dump(lpp, buf); + dump_ir_block_graph(env->irg, "-infeasible"); + } + ) - assert(0 && "ILP solution is not feasible!"); + ir_fprintf(stderr, "ILP found no solution within time (%+F, %+F), falling back to heuristics.\n", block, env->irg); + need_heur = 1; } DBG((env->dbg, LEVEL_1, "\nSolution:\n")); @@ -2126,7 +1917,30 @@ static void create_ilp(ir_node *block, void *walk_env) { } /* apply solution */ - apply_solution(env, lpp, block); +#ifdef FIRM_STATISTICS + if (be_stat_ev_is_active()) { + be_stat_ev("nodes", ba->block_last_idx); + } +#endif /* FIRM_STATISTICS */ + if (need_heur) { +#ifdef FIRM_STATISTICS + if (be_stat_ev_is_active()) { + be_stat_ev("time", -1); + } +#endif /* FIRM_STATISTICS */ + list_sched_single_block(env->birg, block, env->be_opts); + } + else { +#ifdef FIRM_STATISTICS + if (be_stat_ev_is_active()) { + if (lpp) + be_stat_ev_dbl("time", lpp->sol_time); + else + be_stat_ev("time", 0); + } +#endif /* FIRM_STATISTICS */ + apply_solution(env, lpp, block); + } if (lpp) free_lpp(lpp); @@ -2138,7 +1952,7 @@ static void create_ilp(ir_node *block, void *walk_env) { /** * Perform ILP scheduling on the given irg. */ -void be_ilp_sched(const be_irg_t *birg) { +void be_ilp_sched(const be_irg_t *birg, be_options_t *be_opts) { be_ilpsched_env_t env; const char *name = "be ilp scheduling"; arch_isa_t *isa = birg->main_env->arch_env->isa; @@ -2146,6 +1960,13 @@ void be_ilp_sched(const be_irg_t *birg) { FIRM_DBG_REGISTER(env.dbg, "firm.be.sched.ilp"); +#ifdef FIRM_STATISTICS + if (be_stat_ev_is_active()) { + be_stat_tags[STAT_TAG_CLS] = "ilpsched"; + be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file); + } +#endif /* FIRM_STATISTICS */ + // firm_dbg_set_mask(env.dbg, 1); env.irg_env = be_ilp_sched_init_irg_ilp_schedule(sel, birg->irg); @@ -2156,6 +1977,8 @@ void be_ilp_sched(const be_irg_t *birg) { env.arch_env = birg->main_env->arch_env; env.cpu = arch_isa_get_machine(birg->main_env->arch_env->isa); env.opts = &ilp_opts; + env.birg = birg; + env.be_opts = be_opts; phase_init(&env.ph, name, env.irg, PHASE_DEFAULT_GROWTH, init_ilpsched_irn); /* assign a unique per block number to all interesting nodes */ @@ -2198,6 +2021,12 @@ void be_ilp_sched(const be_irg_t *birg) { /* notify backend */ be_ilp_sched_finish_irg_ilp_schedule(sel, birg->irg, env.irg_env); + +#ifdef FIRM_STATISTICS + if (be_stat_ev_is_active()) { + be_stat_ev_pop(); + } +#endif /* FIRM_STATISTICS */ } /**