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

   1 /**
   2  * Backend driver.
   3  * @author Sebastian Hack
   4  * @date 25.11.2004
   5  */
   6 #ifdef HAVE_CONFIG_H
   7 #include "config.h"
   8 #endif
   9
  10 #include <stdarg.h>
  11
  12 #include "obst.h"
  13 #include "bitset.h"
  14
  15 #include "irprog.h"
  16 #include "irgopt.h"
  17 #include "irgraph.h"
  18 #include "irdump.h"
  19 #include "phiclass.h"
  20 #include "irdom_t.h"
  21 #include "iredges_t.h"
  22
  23 #include "be_t.h"
  24 #include "bechordal_t.h"
  25 #include "benumb_t.h"
  26 #include "besched_t.h"
  27 #include "belistsched.h"
  28 #include "belive_t.h"
  29 #include "beutil.h"
  30 #include "bechordal.h"
  31 #include "bearch.h"
  32 #include "becopyoptmain.h"
  33 #include "becopystat.h"
  34 #include "bessadestr.h"
  35 #include "bearch_firm.h"
  36 #include "benode_t.h"
  37 #include "beirgmod.h"
  38
  39 #include "beasm_dump_globals.h"
  40 #include "beasm_asm_gnu.h"
  41
  42 #undef DUMP_ALLOCATED
  43 #undef DUMP_LOCALIZED
  44
  45 #define N_PHASES 256
  46
  47
  48 void be_init(void)
  49 {
  50         be_sched_init();
  51         be_liveness_init();
  52         be_numbering_init();
  53         be_ra_chordal_init();
  54         be_copy_opt_init();
  55         copystat_init();
  56 }
  57
  58 static be_main_env_t *be_init_env(be_main_env_t *env)
  59 {
  60   const arch_isa_if_t *isa = &firm_isa;
  61
  62   obstack_init(&env->obst);
  63
  64   env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
  65   arch_env_init(env->arch_env, isa);
  66   env->arch_env->isa->init();
  67
  68   env->node_factory = obstack_alloc(&env->obst, sizeof(*env->node_factory));
  69   be_node_factory_init(env->node_factory, isa);
  70
  71   arch_env_add_irn_handler(env->arch_env, &firm_irn_handler);
  72   arch_env_add_irn_handler(env->arch_env,
  73       be_node_get_irn_handler(env->node_factory));
  74
  75   return env;
  76 }
  77
  78 static be_main_session_env_t *
  79 be_init_session_env(be_main_session_env_t *env,
  80     be_main_env_t *main_env, ir_graph *irg)
  81 {
  82   env->main_env = main_env;
  83   env->irg = irg;
  84
  85   return env;
  86 }
  87
  88 static void prepare_graph(be_main_session_env_t *s)
  89 {
  90         /*
  91          * Duplicate consts in each block
  92          * (This is just for the firm dummy backend)
  93          */
  94         // localize_consts(s->irg);
  95
  96         /* Remove critical edges */
  97         remove_critical_cf_edges(s->irg);
  98
  99         /* Compute the dominance information. */
 100         free_dom_and_peace(s->irg);
 101         compute_doms(s->irg);
 102
 103         /* Compute the dominance frontiers */
 104         s->dom_front = be_compute_dominance_frontiers(s->irg);
 105
 106         /* Ensure, that the ir_edges are computed. */
 107         edges_assure(s->irg);
 108
 109         dump_dominator_information(true);
 110         dump_ir_block_graph(s->irg, "-prepared");
 111         dump_dominator_information(false);
 112 }
 113
 114 static void be_main_loop(void)
 115 {
 116         int i, n;
 117         be_main_env_t env;
 118         const arch_isa_if_t *isa;
 119
 120         be_init_env(&env);
 121         isa = arch_env_get_isa(env.arch_env);
 122
 123         /* For all graphs */
 124         for(i = 0, n = get_irp_n_irgs(); i < n; ++i) {
 125                 int j, m;
 126                 ir_graph *irg = get_irp_irg(i);
 127                 be_main_session_env_t session;
 128
 129                 /* Init the session. */
 130                 be_init_session_env(&session, &env, irg);
 131
 132                 /* Compute some analyses and prepare the graph for backend use. */
 133                 prepare_graph(&session);
 134
 135 #ifdef DUMP_LOCALIZED
 136                 dump_consts_local(0);
 137                 dump_ir_block_graph(irg, "-local-const");
 138 #endif
 139                 be_numbering(irg);
 140
 141                 /* Schedule the graphs. */
 142                 list_sched(irg, trivial_selector);
 143
 144     /* Verify the schedule */
 145     sched_verify_irg(irg);
 146
 147                 /* Liveness analysis */
 148                 be_liveness(irg);
 149
 150                 dump_ir_block_graph_sched(irg, "-sched");
 151                 copystat_reset();
 152                 copystat_collect_irg(irg, env.arch_env);
 153
 154                 /* Perform the following for each register class. */
 155                 for(j = 0, m = isa->get_n_reg_class(); j < m; ++j) {
 156                         be_chordal_env_t *chordal_env;
 157                         const arch_register_class_t *cls = isa->get_reg_class(j);
 158
 159       chordal_env = be_ra_chordal(irg, env.arch_env, cls);
 160
 161 #ifdef DUMP_ALLOCATED
 162                         dump_allocated_irg(env.arch_env, irg, "");
 163 #endif
 164                         copystat_collect_cls(chordal_env);
 165
 166                         be_copy_opt(chordal_env);
 167                         be_ssa_destruction(&session, chordal_env);
 168                         be_ra_chordal_done(chordal_env);
 169                 }
 170                 copystat_dump_pretty(irg);
 171             be_numbering_done(irg);
 172         }
 173 }
 174
 175 void be_main(int argc, const char *argv[])
 176 {
 177         assembler_t *gnu_assembler;
 178         FILE *asm_output_file;
 179
 180         be_main_loop();
 181         gnu_assembler = gnuasm_create_assembler();
 182         asm_output_file = fopen("asm_output.asm", "w");
 183
 184         asm_dump_globals(gnu_assembler);
 185         gnuasm_dump(gnu_assembler, asm_output_file);
 186         gnuasm_delete_assembler(gnu_assembler);
 187         fclose(asm_output_file);
 188 }