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 #include "irloop_t.h"
  23
  24 #include "be_t.h"
  25 #include "bechordal_t.h"
  26 #include "benumb_t.h"
  27 #include "besched_t.h"
  28 #include "belistsched.h"
  29 #include "belive_t.h"
  30 #include "beutil.h"
  31 #include "bechordal.h"
  32 #include "bearch.h"
  33 #include "becopyoptmain.h"
  34 #include "becopystat.h"
  35 #include "bessadestr.h"
  36 #include "bearch_firm.h"
  37 #include "benode_t.h"
  38 #include "beirgmod.h"
  39 //#include "bespillilp.h"
  40
  41 #include "beasm_dump_globals.h"
  42 #include "beasm_asm_gnu.h"
  43
  44 #undef DUMP_ALLOCATED
  45
  46 #define N_PHASES 256
  47
  48
  49 void be_init(void)
  50 {
  51         be_sched_init();
  52         be_liveness_init();
  53         be_numbering_init();
  54         be_ra_chordal_init();
  55         be_copy_opt_init();
  56         copystat_init();
  57 }
  58
  59 static be_main_env_t *be_init_env(be_main_env_t *env)
  60 {
  61   const arch_isa_if_t *isa = &firm_isa;
  62
  63   obstack_init(&env->obst);
  64   env->dbg = firm_dbg_register("be.main");
  65   firm_dbg_set_mask(env->dbg, SET_LEVEL_1);
  66
  67   env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
  68   arch_env_init(env->arch_env, isa);
  69   env->arch_env->isa->init();
  70
  71   env->node_factory = obstack_alloc(&env->obst, sizeof(*env->node_factory));
  72   be_node_factory_init(env->node_factory, isa);
  73
  74   arch_env_add_irn_handler(env->arch_env, &firm_irn_handler);
  75   arch_env_add_irn_handler(env->arch_env,
  76       be_node_get_irn_handler(env->node_factory));
  77
  78   return env;
  79 }
  80
  81 static be_main_session_env_t *
  82 be_init_session_env(be_main_session_env_t *env,
  83     be_main_env_t *main_env, ir_graph *irg)
  84 {
  85   env->main_env = main_env;
  86   env->irg = irg;
  87
  88   return env;
  89 }
  90
  91 static void prepare_graph(be_main_session_env_t *s)
  92 {
  93         /*
  94          * Duplicate consts in each block
  95          * (This is just for the firm dummy backend)
  96          */
  97         // localize_consts(s->irg);
  98         current_ir_graph = s->irg;
  99
 100         /* Remove critical edges */
 101         remove_critical_cf_edges(s->irg);
 102
 103         /* Compute the dominance information. */
 104         free_dom_and_peace(s->irg);
 105         compute_doms(s->irg);
 106
 107         /* Compute the dominance frontiers */
 108         s->dom_front = be_compute_dominance_frontiers(s->irg);
 109
 110         /* Ensure, that the ir_edges are computed. */
 111         edges_assure(s->irg);
 112
 113         /* Compute loop nesting information (for weighting copies) */
 114         if (get_irg_loopinfo_state(s->irg) != (loopinfo_valid & loopinfo_cf_consistent))
 115                 construct_cf_backedges(s->irg);
 116
 117         dump_dominator_information(true);
 118         dump_ir_block_graph(s->irg, "-prepared");
 119         dump_dominator_information(false);
 120 }
 121
 122 static void be_main_loop(void)
 123 {
 124         int i, n;
 125         be_main_env_t env;
 126         const arch_isa_if_t *isa;
 127
 128         be_init_env(&env);
 129         isa = arch_env_get_isa(env.arch_env);
 130
 131         /* For all graphs */
 132         for(i = 0, n = get_irp_n_irgs(); i < n; ++i) {
 133                 int j, m;
 134                 ir_graph *irg = get_irp_irg(i);
 135                 be_main_session_env_t session;
 136
 137                 DBG((env.dbg, LEVEL_1, "====> IRG: %F\n", irg));
 138
 139                 /* Init the session. */
 140                 be_init_session_env(&session, &env, irg);
 141
 142                 /* Compute some analyses and prepare the graph for backend use. */
 143                 prepare_graph(&session);
 144
 145                 /* Schedule the graphs. */
 146                 list_sched(irg, trivial_selector);
 147                 dump_ir_block_graph_sched(irg, "-sched");
 148
 149                 /* Verify the schedule */
 150                 sched_verify_irg(irg);
 151
 152                 /* Build liveness information */
 153                 be_liveness(irg);
 154
 155                 copystat_reset();
 156                 copystat_collect_irg(irg, env.arch_env);
 157
 158                 /* Perform the following for each register class. */
 159                 for(j = 0, m = isa->get_n_reg_class(); j < m; ++j) {
 160                         be_chordal_env_t *chordal_env;
 161                         const arch_register_class_t *cls = isa->get_reg_class(j);
 162
 163                         DBG((env.dbg, LEVEL_1, "----> Reg class: %s\n", cls->name));
 164
 165                         be_numbering(irg);
 166                         be_liveness(irg);
 167
 168                         //be_spill_ilp(&session, cls);
 169
 170                         chordal_env = be_ra_chordal(&session, cls);
 171
 172 #ifdef DUMP_ALLOCATED
 173                         dump_allocated_irg(env.arch_env, irg, "");
 174 #endif
 175                         copystat_collect_cls(chordal_env);
 176
 177                         be_copy_opt(chordal_env);
 178
 179                         be_ssa_destruction(chordal_env);
 180                         be_ssa_destruction_check(chordal_env);
 181                         be_ra_chordal_check(chordal_env);
 182
 183                         be_ra_chordal_done(chordal_env);
 184                         be_numbering_done(irg);
 185                 }
 186                 dump_ir_block_graph(session.irg, "-post");
 187
 188                 copystat_dump(irg);
 189                 copystat_dump_pretty(irg);
 190         }
 191 }
 192
 193 void be_main(int argc, const char *argv[])
 194 {
 195         assembler_t *gnu_assembler;
 196         FILE *asm_output_file;
 197
 198         be_main_loop();
 199         gnu_assembler = gnuasm_create_assembler();
 200         asm_output_file = fopen("asm_output.asm", "w");
 201
 202         asm_dump_globals(gnu_assembler);
 203         gnuasm_dump(gnu_assembler, asm_output_file);
 204         gnuasm_delete_assembler(gnu_assembler);
 205         fclose(asm_output_file);
 206 }