for(irn = pset_first(live_end); irn; irn = pset_next(live_end)) {
DBG((dbg, LEVEL_3, "\tMaking live: %n/%d\n", irn, get_irn_graph_nr(irn)));
bitset_set(live, get_irn_graph_nr(irn));
- if(!is_Phi(irn) && is_allocatable_irn(irn))
+ if(is_allocatable_irn(irn))
border_use(irn, step, 0);
}
obstack_free(obst, obstack_level);
}
-
-#if 0
-static void block_alloc(ir_node *block, void *env_ptr)
-{
- env_t *env = env_ptr;
- struct obstack *obst = &env->obst;
- void *obstack_level = obstack_base(obst);
- bitset_t *live = env->live;
- bitset_t *colors = env->colors;
- bitset_t *in_colors = env->in_colors;
- bitset_t *used_colors = bitset_malloc(env->colors_n);
- bitset_t *tmp_colors = bitset_obstack_alloc(obst, env->colors_n);
- ir_graph *irg = get_irn_irg(block);
- int also_assign = env->assign;
-
- int i, n;
- int block_nr = get_block_graph_nr(block);
- const ir_node *irn;
- border_t *b;
- struct list_head *head = &get_ra_block_info(block)->border_head;
- pset *live_in = get_live_in(block);
- pset *live_end = get_live_end(block);
-
- /*
- * Check, if this block has already been processed, if true, return
- * immediately.
- */
- if(bitset_is_set(env->processed, block_nr))
- return;
-
- /*
- * Ensure, that the immediate dominator of this block is allocated
- * before this block, since the values live in at this block are
- * defined in the dominators of this block. Coloring the dominators
- * thus is vital before coloring this block.
- */
- if(idom)
- block_alloc(idom, env);
-
- /* Clear the live and allocate the color bitset. */
- bitset_clear_all(live);
- bitset_clear_all(colors);
- bitset_clear_all(in_colors);
-
- INIT_LIST_HEAD(&head);
-
- /*
- * Make final uses of all values live out of the block.
- * They are neccessary to build up real intervals.
- */
- for(irn = pset_first(live_end); irn; irn = pset_next(live_end)) {
- DBG((dbg, LEVEL_3, "Making live: %n/%d\n", irn, get_irn_graph_nr(irn)));
- bitset_set(live, get_irn_graph_nr(irn));
- if(!is_Phi(irn) && is_allocatable_irn(irn))
- border_add(env, &head, irn, step, 0);
- }
-
- ++step;
-
- /*
- * Determine the last uses of a value inside the block, since they are
- * relevant for the interval borders.
- */
- sched_foreach_reverse(block, irn) {
- DBG((dbg, LEVEL_1, "insn: %n\n", irn));
- DBG((dbg, LEVEL_2, "live: %b\n", live));
-
- set_irn_color(irn, NO_COLOR);
-
- /*
- * If the node defines a datab value, i.e. something, registers must
- * be allocated for, add a new def border to the border list.
- */
- if(is_allocatable_irn(irn)) {
- int nr = get_irn_graph_nr(irn);
-
- bitset_clear(live, nr);
- border_add(env, &head, irn, step, 1);
-
-#ifdef BUILD_GRAPH
- {
- unsigned long elm;
- bitset_foreach(live, elm) {
- int live_nr = (int) elm;
- ir_node *live_irn = get_irn_for_graph_nr(irg, live_nr);
- if(is_phi_operand(live_irn)) {
- add_if(env, nr, live_nr);
- }
- }
- }
-#endif
- }
-
- /*
- * If the node is no phi node we can examine the uses.
- */
- if(!is_Phi(irn)) {
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
-
- if(is_allocatable_irn(op)) {
- int nr = get_irn_graph_nr(op);
-
- DBG((dbg, LEVEL_4, "\t\tpos: %d, use: %n\n", i, op));
-
- if(!bitset_is_set(live, nr)) {
- border_add(env, &head, op, step, 0);
- bitset_set(live, nr);
- }
- }
- }
- }
-
- ++step;
- }
-
- bitset_clear_all(live);
-
- /*
- * Add initial defs for all values live in.
- * Since their colors have already been assigned (The dominators were
- * allocated before), we have to mark their colors as used also.
- */
- for(irn = pset_first(live_in); irn; irn = pset_next(live_in)) {
- if(is_allocatable_irn(irn)) {
- int col = get_irn_color(irn);
-
- /* Mark the color of the live in value as used. */
- assert(is_color(col) && "Node must have been assigned a color.");
- bitset_set(colors, col);
- bitset_set(in_colors, col);
- bitset_set(used_colors, col);
-
- /* Mark the value live in. */
- bitset_set(live, get_irn_graph_nr(irn));
-
- /* Add the def */
- border_add(env, &head, irn, step, 1);
- }
- }
-
- DBG((dbg, LEVEL_4, "usedef chain for block %n\n", block));
- list_for_each_entry(border_t, b, &head, list) {
- DBG((dbg, LEVEL_4, "\t%s %n %d\n", b->is_def ? "def" : "use", b->irn, get_irn_graph_nr(b->irn)));
- }
-
- /*
- * Mind that the sequence of defs from back to front defines a perfect
- * elimination order. So, coloring the definitions from first to last
- * will work.
- */
- list_for_each_entry_reverse(border_t, b, &head, list) {
- const ir_node *irn = b->irn;
- int nr = get_irn_graph_nr(irn);
-
- /*
- * Assign a color, if it is a local def. Global defs already have a
- * color.
- */
- if(b->is_def && !is_live_in(block, irn)) {
- ra_node_info_t *ri = get_ra_node_info(irn);
- int col = NO_COLOR;
-
- DBG((dbg, LEVEL_4, "colors in use: %b\n", colors));
-
- /*
- * Try to assign live out values colors which are not used by live
- * in values.
- */
- if(is_live_out(block, irn)) {
- bitset_copy(tmp_colors, colors);
- bitset_or(tmp_colors, in_colors);
- col = bitset_next_clear(tmp_colors, 0);
- DBG((dbg, LEVEL_5, "next clear in only outs %b: %d\n", tmp_colors, col));
- }
-
- /* If a color is not yet assigned, do it now. */
- if(!is_color(col))
- col = bitset_next_clear(colors, 0);
-
- assert(!is_color(get_irn_color(irn)) && "Color must not have assigned");
- assert(!bitset_is_set(live, nr) && "Value def must not have been encountered");
-
- bitset_set(colors, col);
- bitset_set(used_colors, col);
- bitset_set(live, nr);
-
- ri->color = col;
- ri->pressure = bitset_popcnt(colors);
-
- DBG((dbg, LEVEL_1, "\tassigning color %d to %n\n", col, irn));
- }
-
- /* Clear the color upon a use. */
- else if(!b->is_def) {
- int col = get_irn_color(irn);
-
- assert(bitset_is_set(live, nr) && "Cannot have a non live use");
- assert(is_color(col) && "A color must have been assigned");
-
- bitset_clear(colors, col);
- bitset_clear(live, nr);
- }
- }
-
-#ifdef DUMP_INTERVALS
- draw_interval_graphs(block, &head, &dump_params);
-#endif
-
-#ifdef DUMP_PRESSURE
- {
- char buf[128];
- FILE *f;
-
- ir_snprintf(buf, sizeof(buf), "pres_%s_bl_%N.txt",
- get_entity_name(get_irg_entity(irg)), block);
-
- if((f = fopen(buf, "wt")) != NULL) {
- sched_foreach_reverse(block, irn) {
- if(is_allocatable_irn(irn))
- ir_fprintf(f, "\"%n\" %d %d\n", irn, sched_get_time_step(irn),
- get_ra_node_info(irn)->pressure);
-
- }
- fclose(f);
- }
- }
-#endif
-
-
- /*
- * Allocate the used colors array in the blocks ra info structure and
- * fill it.
- */
- get_ra_block_info(block)->used_colors = used_colors;
-
- /* Mark this block has processed. */
- bitset_set(env->processed, block_nr);
-
- /* Reset the obstack to its initial level */
- obstack_free(obst, obstack_level);
-}
-
-#endif
-
void be_ra_chordal_init(void)
{
dbg = firm_dbg_register(DBG_BERA);
- firm_dbg_set_mask(dbg, -1);
+ /* firm_dbg_set_mask(dbg, -1); */
}
void be_ra_chordal(ir_graph *irg)
projects / libfirm / blobdiff