X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbesched.c;h=c156d73e1c31d82e9e822d2401814c2340c14b38;hb=34e3b8d50bce639e760da7233524a4db85c80290;hp=4256936ac75f18cc9c464bc63c17c5a5a39944d7;hpb=93dcf9f29548c6f5036cdeb9cf5c60f4b3ca1e9c;p=libfirm diff --git a/ir/be/besched.c b/ir/be/besched.c index 4256936ac..c156d73e1 100644 --- a/ir/be/besched.c +++ b/ir/be/besched.c @@ -1,158 +1,171 @@ +/* + * This file is part of libFirm. + * Copyright (C) 2012 University of Karlsruhe. + */ + +/** + * @file + * @brief Scheduling utilities for nodes in Blocks and Blocks. + * @author Sebastian Hack + */ +#include "config.h" #include -#include "impl.h" -#include "irprintf.h" -#include "irgwalk.h" -#include "irnode.h" +#include "firm_types.h" +#include "iredges_t.h" +#include "ircons.h" +#include "irgmod.h" #include "debug.h" -#include "besched_t.h" +#include "bemodule.h" +#include "bearch.h" #include "besched.h" +#include "beutil.h" #include "belistsched.h" +#include "belive.h" -FIRM_IMPL1(sched_get_time_step, int, const ir_node *) -FIRM_IMPL1(sched_has_next, int, const ir_node *) -FIRM_IMPL1(sched_has_prev, int, const ir_node *) -FIRM_IMPL1(sched_next, ir_node *, const ir_node *) -FIRM_IMPL1(sched_prev, ir_node *, const ir_node *) -FIRM_IMPL1(sched_first, ir_node *, const ir_node *) -FIRM_IMPL1(sched_last, ir_node *, const ir_node *) -FIRM_IMPL2(sched_add_after, ir_node *, ir_node *, ir_node *) -FIRM_IMPL2(sched_add_before, ir_node *, ir_node *, ir_node *) +#include "lc_opts.h" +#include "lc_opts_enum.h" +#include "irtools.h" -size_t sched_irn_data_offset = 0; +#define SCHED_INITIAL_GRANULARITY (1 << 14) -static void block_sched_dumper(ir_node *block, void *env) +static void sched_renumber(ir_node *const block) { - FILE *f = env; - const ir_node *curr; + sched_info_t *inf; + sched_timestep_t step = SCHED_INITIAL_GRANULARITY; - ir_fprintf(f, "%n:\n", block); - sched_foreach(block, curr) { - ir_fprintf(f, "\t%n\n", curr); + sched_foreach(block, irn) { + inf = get_irn_sched_info(irn); + inf->time_step = step; + step += SCHED_INITIAL_GRANULARITY; } } -void be_sched_dump(FILE *f, const ir_graph *irg) +static inline void sched_set_time_stamp(const ir_node *irn) { - irg_block_walk_graph((ir_graph *) irg, block_sched_dumper, NULL, f); + sched_info_t *info = get_irn_sched_info(irn); + const sched_info_t *prev_info = get_irn_sched_info(info->prev); + const sched_info_t *next_info = get_irn_sched_info(info->next); + sched_timestep_t before_ts = prev_info->time_step; + sched_timestep_t after_ts = next_info->time_step; + + /* + * If we are the last, we can give us a big time step, + * else we have to compute our time step from our + * neighbours. + */ + if(before_ts >= after_ts) { + info->time_step = before_ts + SCHED_INITIAL_GRANULARITY; + /* overflow? */ + if (info->time_step <= before_ts) { + sched_renumber(get_nodes_block(irn)); + } + } else { + sched_timestep_t ts = (before_ts + after_ts) / 2; + + /* + * If the resolution went out, we have to renumber + * this block. + */ + if(ts == before_ts || ts == after_ts) + sched_renumber(get_nodes_block(irn)); + else + info->time_step = ts; + } } -void be_sched_init(void) +void sched_add_before(ir_node *before, ir_node *irn) { - sched_irn_data_offset = register_additional_node_data(sizeof(sched_info_t)); - firm_dbg_register("be.sched"); + sched_info_t *info = get_irn_sched_info(irn); + ir_node *next = before; + sched_info_t *next_info = get_irn_sched_info(next); + ir_node *prev = next_info->prev; + sched_info_t *prev_info = get_irn_sched_info(prev); + assert(sched_is_scheduled(before)); + assert(!sched_is_scheduled(irn)); + assert(!is_Proj(before)); + assert(!is_Proj(irn)); + + info->prev = prev; + info->next = next; + prev_info->next = irn; + next_info->prev = irn; + sched_set_time_stamp(irn); } -void be_sched_test(void) +void sched_add_after(ir_node *after, ir_node *irn) { - int i, n; - struct obstack obst; + sched_info_t *info = get_irn_sched_info(irn); + ir_node *prev = after; + sched_info_t *prev_info = get_irn_sched_info(prev); + ir_node *next = prev_info->next; + sched_info_t *next_info = get_irn_sched_info(next); + assert(sched_is_scheduled(after)); + assert(!sched_is_scheduled(irn)); + assert(!is_Proj(after)); + assert(!is_Proj(irn)); + + info->prev = prev; + info->next = next; + prev_info->next = irn; + next_info->prev = irn; + sched_set_time_stamp(irn); +} - obstack_init(&obst); +void sched_remove(ir_node *irn) +{ + sched_info_t *info = get_irn_sched_info(irn); + ir_node *prev = info->prev; + ir_node *next = info->next; + sched_info_t *prev_info = get_irn_sched_info(prev); + sched_info_t *next_info = get_irn_sched_info(next); + assert(sched_is_scheduled(irn)); + + prev_info->next = next; + next_info->prev = prev; + info->next = NULL; + info->prev = NULL; +} - for(i = 0, n = get_irp_n_irgs(); i < n; ++i) { - ir_graph *irg = get_irp_irg(i); +void sched_replace(ir_node *const old, ir_node *const irn) +{ + assert(sched_is_scheduled(old)); + assert(!sched_is_scheduled(irn)); - list_sched(irg, trivial_selector); - be_sched_dump(stdout, irg); - } + sched_info_t *const old_info = get_irn_sched_info(old); + sched_info_t *const irn_info = get_irn_sched_info(irn); + *irn_info = *old_info; - obstack_free(&obst, NULL); -} + old_info->prev = NULL; + old_info->next = NULL; -void sched_renumber(const ir_node *block) -{ - ir_node *irn; - sched_info_t *inf; - sched_timestep_t step = 0; - - sched_foreach(block, irn) { - inf = get_irn_sched_info(irn); - inf->time_step = step; - step += SCHED_INITIAL_GRANULARITY; - } + ir_node *const prev = irn_info->prev; + ir_node *const next = irn_info->next; + get_irn_sched_info(prev)->next = irn; + get_irn_sched_info(next)->prev = irn; } +static be_module_list_entry_t *schedulers; +static schedule_func scheduler; -int sched_verify(const ir_node *block) +void be_register_scheduler(const char *name, schedule_func func) { - firm_dbg_module_t *dbg_sched = firm_dbg_register("be.sched"); - int res = 1; - const ir_node *irn; - int i, n; - int *save_time_step; - - /* Count the number of nodes in the schedule. */ - n = 0; - sched_foreach(block, irn) - n++; - - save_time_step = malloc(n * sizeof(save_time_step[0])); - - i = 0; - sched_foreach(block, irn) { - sched_info_t *info = get_irn_sched_info(irn); - save_time_step[i] = info->time_step; - info->time_step = i; - - i += 1; - } - - /* - * Check if each relevant operand of a node is scheduled before - * the node itself. - */ - sched_foreach(block, irn) { - int i, n; - int step = sched_get_time_step(irn); - - for(i = 0, n = get_irn_arity(irn); i < n; i++) { - ir_node *op = get_irn_n(irn, i); - - if(mode_is_datab(get_irn_mode(op)) - && get_nodes_block(op) == block - && sched_get_time_step(op) > step) { - - DBG((dbg_sched, LEVEL_DEFAULT, - "%n is operand of %n but scheduled after", op, irn)); - res = 0; - } - } - } - - /* Check, if the time steps are correct */ - for(i = 1; i < n; ++i) { - if(save_time_step[i] - save_time_step[i - 1] <= 0) { - DBG((dbg_sched, LEVEL_DEFAULT, - "position %d: time step shrinks (from %d to %d)\n", - i, save_time_step[i - 1], save_time_step[i])); - res = 0; - } - } - - /* Restore the old time steps */ - i = 0; - sched_foreach(block, irn) { - sched_info_t *info = get_irn_sched_info(irn); - info->time_step = save_time_step[i++]; - } - - free(save_time_step); - return res; + if (scheduler == NULL) + scheduler = func; + be_add_module_to_list(&schedulers, name, (void*)func); } -static void sched_verify_walker(ir_node *irn, void *data) +void be_schedule_graph(ir_graph *irg) { - int *res = data; - *res &= sched_verify(irn); + scheduler(irg); } -int sched_verify_irg(ir_graph *irg) +BE_REGISTER_MODULE_CONSTRUCTOR(be_init_sched) +void be_init_sched(void) { - int res = 1; - irg_block_walk_graph(irg, sched_verify_walker, NULL, &res); - - return res; + lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be"); + be_add_module_list_opt(be_grp, "scheduler", "scheduling algorithm", + &schedulers, (void**)&scheduler); }