/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @brief Common stuff used by all ILP formulations.
* @author Daniel Grund
* @date 28.02.2006
- * @version $Id$
*/
#include "config.h"
+#include <stdbool.h>
+
+#include "be_t.h"
+#include "beintlive_t.h"
+#include "beirg.h"
#include "irtools.h"
#include "irprintf.h"
-#include "bestatevent.h"
-#include "beirg_t.h"
+#include "statev_t.h"
#include "bemodule.h"
#include "error.h"
+#include "lpp.h"
+
#include "lc_opts.h"
#include "lc_opts_enum.h"
-#ifdef WITH_ILP
-
#define DUMP_ILP 1
-#define DUMP_SOL 2
static int time_limit = 60;
-static int solve_net = 1;
static int solve_log = 0;
static unsigned dump_flags = 0;
static const lc_opt_enum_mask_items_t dump_items[] = {
- { "ilp", DUMP_ILP },
- { "sol", DUMP_SOL },
- { NULL, 0 }
+ { "ilp", DUMP_ILP },
+ { NULL, 0 }
};
static lc_opt_enum_mask_var_t dump_var = {
static const lc_opt_table_entry_t options[] = {
LC_OPT_ENT_INT ("limit", "time limit for solving in seconds (0 for unlimited)", &time_limit),
- LC_OPT_ENT_BOOL ("net", "solve over the net", &solve_net),
LC_OPT_ENT_BOOL ("log", "show ilp solving log", &solve_log),
LC_OPT_ENT_ENUM_MASK("dump", "dump flags", &dump_var),
LC_OPT_LAST
};
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_copyilp)
void be_init_copyilp(void)
{
lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
lc_opt_add_table(ilp_grp, options);
}
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_copyilp);
-
#include "becopyilp_t.h"
-#include "beifg_t.h"
+#include "beifg.h"
/******************************************************************************
_____ _ _ _ _
*****************************************************************************/
-size_red_t *new_size_red(copy_opt_t *co) {
- size_red_t *res = XMALLOC(size_red_t);
+/**
+ * Checks if a node is simplicial in the graph heeding the already removed nodes.
+ */
+static inline bool sr_is_simplicial(ilp_env_t *const ienv, ir_node const *const ifn)
+{
+ bool res = true;
+ ir_node **all = NEW_ARR_F(ir_node*, 0);
+ be_lv_t *const lv = be_get_irg_liveness(ienv->co->irg);
+ neighbours_iter_t iter;
+ be_ifg_foreach_neighbour(ienv->co->cenv->ifg, &iter, ifn, curr) {
+ /* Only consider non-removed neighbours. */
+ if (sr_is_removed(ienv, curr))
+ continue;
+
+ /* Check whether the current node forms a clique with all previous nodes. */
+ for (size_t i = ARR_LEN(all); i-- != 0;) {
+ if (!be_values_interfere(lv, curr, all[i])) {
+ res = false;
+ goto end;
+ }
+ }
- res->co = co;
- res->all_removed = pset_new_ptr_default();
- res->col_suff = NULL;
- obstack_init(&res->ob);
+ ARR_APP1(ir_node*, all, curr);
+ }
+end:
+ DEL_ARR_F(all);
return res;
}
/**
- * Checks if a node is simplicial in the graph heeding the already removed nodes.
+ * Virtually remove all nodes not related to the problem
+ * (simplicial AND not adjacent to a equal-color-edge)
*/
-static INLINE int sr_is_simplicial(size_red_t *sr, const ir_node *ifn) {
- int i, o, size = 0;
- ir_node **all, *curr;
- be_ifg_t *ifg = sr->co->cenv->ifg;
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
-
- all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
-
- /* get all non-removed neighbors */
- be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
- if (!sr_is_removed(sr, curr))
- all[size++] = curr;
-
- /* check if these form a clique */
- for (i=0; i<size; ++i)
- for (o=i+1; o<size; ++o)
- if (!be_ifg_connected(ifg, all[i], all[o]))
- return 0;
-
- /* all edges exist so this is a clique */
- return 1;
-}
-
-void sr_remove(size_red_t *sr) {
- ir_node *irn;
- int redo = 1;
- const be_ifg_t *ifg = sr->co->cenv->ifg;
- void *iter = be_ifg_nodes_iter_alloca(ifg);
+static void sr_remove(ilp_env_t *const ienv)
+{
+ bool redo = true;
+ const be_ifg_t *ifg = ienv->co->cenv->ifg;
while (redo) {
- redo = 0;
- be_ifg_foreach_node(ifg, iter, irn) {
- const arch_register_req_t *req = arch_get_register_req(irn, -1);
-
- if (!arch_register_req_is(req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {
- if (sr_is_simplicial(sr, irn)) {
- coloring_suffix_t *cs = obstack_alloc(&sr->ob, sizeof(*cs));
-
- cs->irn = irn;
- cs->next = sr->col_suff;
- sr->col_suff = cs;
-
- pset_insert_ptr(sr->all_removed, irn);
-
- redo = 1;
- }
- }
+ redo = false;
+ be_ifg_foreach_node(ifg, irn) {
+ const arch_register_req_t *req = arch_get_irn_register_req(irn);
+ if (arch_register_req_is(req, limited) || sr_is_removed(ienv, irn))
+ continue;
+ if (co_gs_is_optimizable(ienv->co, irn))
+ continue;
+ if (!sr_is_simplicial(ienv, irn))
+ continue;
+
+ ARR_APP1(ir_node*, ienv->col_suff, irn);
+ ir_nodeset_insert(&ienv->all_removed, irn);
+
+ redo = true;
}
}
}
-void sr_reinsert(size_red_t *sr) {
- coloring_suffix_t *cs;
- be_ifg_t *ifg = sr->co->cenv->ifg;
- bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(sr->co->cls));
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
+/**
+ * Virtually reinsert the nodes removed before and color them
+ */
+static void sr_reinsert(ilp_env_t *const ienv)
+{
+ ir_graph *irg = ienv->co->irg;
+ be_ifg_t *ifg = ienv->co->cenv->ifg;
+ unsigned n_regs = arch_register_class_n_regs(ienv->co->cls);
+
+ unsigned *const allocatable_cols = rbitset_alloca(n_regs);
+ be_set_allocatable_regs(irg, ienv->co->cls, allocatable_cols);
+
+ unsigned *const possible_cols = rbitset_alloca(n_regs);
+ neighbours_iter_t iter;
/* color the removed nodes in right order */
- for (cs = sr->col_suff; cs; cs = cs->next) {
- int free_col;
- ir_node *other, *irn;
+ for (size_t i = ARR_LEN(ienv->col_suff); i-- != 0;) {
+ ir_node *const irn = ienv->col_suff[i];
- /* get free color by inspecting all neighbors */
- irn = cs->irn;
- bitset_clear_all(used_cols);
+ rbitset_copy(possible_cols, allocatable_cols, n_regs);
- be_ifg_foreach_neighbour(ifg, iter, irn, other) {
- if (!sr_is_removed(sr, other)) /* only inspect nodes which are in graph right now */
- bitset_set(used_cols, get_irn_col(other));
+ /* get free color by inspecting all neighbors */
+ be_ifg_foreach_neighbour(ifg, &iter, irn, other) {
+ const arch_register_req_t *cur_req;
+ unsigned cur_col;
+
+ /* only inspect nodes which are in graph right now */
+ if (sr_is_removed(ienv, other))
+ continue;
+
+ cur_req = arch_get_irn_register_req(other);
+ cur_col = get_irn_col(other);
+
+ /* Invalidate all single size register when it is a large one */
+ do {
+ rbitset_clear(possible_cols, cur_col);
+ ++cur_col;
+ } while ((cur_col % cur_req->width) != 0);
}
/* now all bits not set are possible colors */
- free_col = bitset_next_clear(used_cols, 0);
- assert(free_col != -1 && "No free color found. This can not be.");
- set_irn_col(sr->co, irn, free_col);
- pset_remove_ptr(sr->all_removed, irn); /* irn is back in graph again */
+ /* take one that matches the alignment constraint */
+ unsigned free_col;
+ assert(!rbitset_is_empty(possible_cols, n_regs) && "No free color found. This can not be.");
+ for (;;) {
+ free_col = (unsigned)rbitset_next(possible_cols, free_col, true);
+ if (free_col % arch_get_irn_register_req(irn)->width == 0)
+ break;
+ ++free_col;
+ assert(free_col < n_regs);
+ }
+ set_irn_col(ienv->co->cls, irn, free_col);
+ ir_nodeset_remove(&ienv->all_removed, irn); /* irn is back in graph again */
}
}
-void free_size_red(size_red_t *sr) {
- del_pset(sr->all_removed);
- obstack_free(&sr->ob, NULL);
- free(sr);
-}
-
/******************************************************************************
_____ _ _____ _ _____
/ ____| (_) |_ _| | | __ \
#include <stdio.h>
-ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env) {
+ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env)
+{
ilp_env_t *res = XMALLOC(ilp_env_t);
res->co = co;
res->build = build;
res->apply = apply;
res->env = env;
- res->sr = new_size_red(co);
+ res->col_suff = NEW_ARR_F(ir_node*, 0);
+ ir_nodeset_init(&res->all_removed);
return res;
}
-lpp_sol_state_t ilp_go(ilp_env_t *ienv) {
- be_main_env_t *main_env = ienv->co->cenv->birg->main_env;
+lpp_sol_state_t ilp_go(ilp_env_t *ienv)
+{
+ ir_graph *irg = ienv->co->irg;
- sr_remove(ienv->sr);
+ sr_remove(ienv);
ienv->build(ienv);
- lpp_set_time_limit(ienv->lp, time_limit);
-
- if(solve_log)
- lpp_set_log(ienv->lp, stdout);
-
- if(solve_net)
- lpp_solve_net(ienv->lp, main_env->options->ilp_server, main_env->options->ilp_solver);
- else {
-#ifdef LPP_SOLVE_NET
- fprintf(stderr, "can only solve ilp over the net\n");
-#else
- lpp_solve_cplex(ienv->lp);
-#endif
- }
-
- be_stat_ev_dbl("co_ilp_objval", ienv->lp->objval);
- be_stat_ev_dbl("co_ilp_best_bound", ienv->lp->best_bound);
- be_stat_ev ("co_ilp_iter", ienv->lp->iterations);
- be_stat_ev_dbl("co_ilp_sol_time", ienv->lp->sol_time);
- if(dump_flags & DUMP_ILP) {
+ if (dump_flags & DUMP_ILP) {
char buf[128];
FILE *f;
- ir_snprintf(buf, sizeof(buf), "%F_%s-co.ilp", ienv->co->cenv->irg,
+ ir_snprintf(buf, sizeof(buf), "%F_%s-co.ilp", irg,
ienv->co->cenv->cls->name);
f = fopen(buf, "wt");
- if(f == NULL) {
+ if (f == NULL) {
panic("Couldn't open '%s' for writing", buf);
}
lpp_dump_plain(ienv->lp, f);
fclose(f);
}
+ lpp_set_time_limit(ienv->lp, time_limit);
+ if (solve_log)
+ lpp_set_log(ienv->lp, stdout);
+
+ lpp_solve(ienv->lp, be_options.ilp_server, be_options.ilp_solver);
+
+ //stat_ev_dbl("co_ilp_objval", ienv->lp->objval);
+ //stat_ev_dbl("co_ilp_best_bound", ienv->lp->best_bound);
+ stat_ev_int("co_ilp_iter", lpp_get_iter_cnt(ienv->lp));
+ stat_ev_dbl("co_ilp_sol_time", lpp_get_sol_time(ienv->lp));
+
ienv->apply(ienv);
- sr_reinsert(ienv->sr);
+ sr_reinsert(ienv);
return lpp_get_sol_state(ienv->lp);
}
-void free_ilp_env(ilp_env_t *ienv) {
- free_size_red(ienv->sr);
- free_lpp(ienv->lp);
+void free_ilp_env(ilp_env_t *ienv)
+{
+ ir_nodeset_destroy(&ienv->all_removed);
+ DEL_ARR_F(ienv->col_suff);
+ lpp_free(ienv->lp);
free(ienv);
}
-
-#else /* WITH_ILP */
-
-static INLINE void only_that_you_can_compile_without_WITH_ILP_defined(void) {
-}
-
-#endif /* WITH_ILP */