nsz Git - libfirm/blob - ir/be/becopyoptmain.c

   1 /**
   2  * Author:      Daniel Grund
   3  * Date:                11.04.2005
   4  * Copyright:   (c) Universitaet Karlsruhe
   5  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
   6
   7  * Main file for the optimization reducing the copies needed for:
   8  * - phi coalescing
   9  * - register-constrained nodes
  10  */
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include <libcore/lc_timing.h>
  16 #include "pmap.h"
  17 #include "debug.h"
  18 #include "irouts.h"
  19 #include "becopyopt.h"
  20 #include "becopystat.h"
  21 #include "becopyoptmain.h"
  22 #include "phiclass.h"
  23
  24 #define DO_HEUR
  25 #define DO_ILP
  26 #define DO_ILP_N_SEC
  27
  28 #define DEBUG_LVL SET_LEVEL_0
  29 static firm_dbg_module_t *dbg = NULL;
  30
  31 void be_copy_opt_init(void) {
  32         dbg = firm_dbg_register("ir.be.copyoptmain");
  33         firm_dbg_set_mask(dbg, DEBUG_LVL);
  34 }
  35
  36 typedef struct color_saver {
  37         arch_env_t *arch_env;
  38         be_chordal_env_t *chordal_env;
  39         pmap *saved_colors;
  40         int flag;  /* 0 save; 1 load */
  41 } color_save_t;
  42
  43 static void save_load(ir_node *irn, void *env) {
  44         color_save_t *saver = env;
  45         if (saver->chordal_env->cls == arch_get_irn_reg_class(saver->arch_env, irn, arch_pos_make_out(0))) {
  46                 if (saver->flag == 0) { /* save */
  47                         const arch_register_t *reg = arch_get_irn_register(saver->arch_env, irn, 0);
  48                         pmap_insert(saver->saved_colors, irn, (void *) reg);
  49                 } else { /*load */
  50                         arch_register_t *reg = pmap_get(saver->saved_colors, irn);
  51                         arch_set_irn_register(saver->arch_env, irn, 0, reg);
  52                 }
  53         }
  54 }
  55
  56 static void save_colors(color_save_t *color_saver) {
  57         color_saver->flag = 0;
  58         irg_walk_graph(color_saver->chordal_env->session_env->irg, save_load, NULL, color_saver);
  59 }
  60
  61 static void load_colors(color_save_t *color_saver) {
  62         color_saver->flag = 1;
  63         irg_walk_graph(color_saver->chordal_env->session_env->irg, save_load, NULL, color_saver);
  64 }
  65
  66 void be_copy_opt(be_chordal_env_t *chordal_env) {
  67         copy_opt_t *co;
  68         int costs, costs_init=-1, costs_heur=-1, costs_ilp_n_sec=-1, costs_ilp=-1;
  69         int lower_bound;
  70         color_save_t saver;
  71         saver.arch_env = chordal_env->session_env->main_env->arch_env;
  72         saver.chordal_env = chordal_env;
  73         saver.saved_colors = pmap_create();
  74
  75         /* BETTER: You can remove this if you replace all
  76          * `grep get_irn_out *.c` by the irouts.h module.*/
  77         compute_outs(chordal_env->session_env->irg);
  78
  79         co = new_copy_opt(chordal_env, get_costs_loop_depth);
  80         DBG((dbg, LEVEL_1, "----> CO: %s\n", co->name));
  81         phi_class_compute(chordal_env->session_env->irg);
  82
  83 #ifdef DO_STAT
  84         lower_bound = co_get_lower_bound(co);
  85         DBG((dbg, LEVEL_1, "Lower Bound: %3d\n", lower_bound));
  86         DBG((dbg, LEVEL_1, "Inevit Costs: %3d\n", co_get_inevit_copy_costs(co)));
  87
  88         costs = co_get_copy_costs(co);
  89         costs_init = costs;
  90         copystat_add_max_costs(co_get_max_copy_costs(co));
  91         copystat_add_inevit_costs(co_get_inevit_copy_costs(co));
  92         copystat_add_init_costs(costs_init);
  93         DBG((dbg, LEVEL_1, "Init costs: %3d\n", costs_init));
  94 #endif
  95
  96         save_colors(&saver);
  97
  98 #ifdef DO_HEUR
  99         lc_timer_t *timer = lc_timer_register("heur", NULL);
 100         lc_timer_reset_and_start(timer);
 101         co_heur_opt(co);
 102         lc_timer_stop(timer);
 103         copystat_add_heur_time(lc_timer_elapsed_msec(timer));
 104 #ifdef DO_STAT
 105         costs = co_get_copy_costs(co);
 106         costs_heur = costs;
 107         copystat_add_heur_costs(costs_heur);
 108         DBG((dbg, LEVEL_1, "Heur costs: %3d\n", costs_heur));
 109 #endif
 110         assert(lower_bound == -1 || costs_heur == -1 || lower_bound <= costs_heur);
 111 #endif
 112
 113         load_colors(&saver);
 114
 115 #ifdef DO_ILP_N_SEC
 116         co_ilp_opt(co, 2.0);
 117 #ifdef DO_STAT
 118         costs = co_get_copy_costs(co);
 119         costs_ilp_n_sec = costs;
 120         copystat_add_ilp_n_sec_costs(costs_ilp_n_sec);
 121         DBG((dbg, LEVEL_1, "N_Sec costs: %3d\n", costs_ilp_n_sec));
 122 #endif
 123         assert(lower_bound == -1 || costs_ilp == -1 || lower_bound <= costs_ilp);
 124         assert(costs_ilp == -1 || costs_heur == -1 || costs_ilp <= costs_heur);
 125 #endif
 126
 127         load_colors(&saver);
 128
 129 #ifdef DO_ILP
 130         co_ilp_opt(co, 0.0);
 131 #ifdef DO_STAT
 132         costs = co_get_copy_costs(co);
 133         costs_ilp = costs;
 134         copystat_add_opt_costs(costs_ilp);
 135         DBG((dbg, LEVEL_1, "Opt  costs: %3d\n", costs_ilp));
 136 #endif
 137         assert(lower_bound == -1 || costs_ilp == -1 || lower_bound <= costs_ilp);
 138         assert(costs_ilp == -1 || costs_heur == -1 || costs_ilp <= costs_heur);
 139 #endif
 140
 141         pmap_destroy(saver.saved_colors);
 142         free_copy_opt(co);
 143 }