4 * Copyright: (c) Universitaet Karlsruhe
5 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
7 * Common stuff used by all ILP fomulations.
11 #include "bestatevent.h"
15 #endif /* HAVE_CONFIG_H */
22 static int time_limit = 60;
23 static int solve_net = 1;
24 static int solve_log = 0;
25 static int dump_flags = 0;
28 #include <libcore/lc_opts.h>
29 #include <libcore/lc_opts_enum.h>
30 static const lc_opt_enum_mask_items_t dump_items[] = {
36 static lc_opt_enum_mask_var_t dump_var = {
37 &dump_flags, dump_items
40 static const lc_opt_table_entry_t options[] = {
41 LC_OPT_ENT_INT ("limit", "time limit for solving in seconds (0 for unlimited)", &time_limit),
42 LC_OPT_ENT_BOOL ("net", "solve over the net", &solve_net),
43 LC_OPT_ENT_BOOL ("log", "show ilp solving log", &solve_log),
44 LC_OPT_ENT_ENUM_MASK("dump", "dump flags", &dump_var),
48 void be_co_ilp_register_options(lc_opt_entry_t *grp)
50 lc_opt_entry_t *ilp_grp = lc_opt_get_grp(grp, "ilp");
51 lc_opt_add_table(ilp_grp, options);
53 #endif /* WITH_LIBCORE */
56 #include "becopyilp_t.h"
59 /******************************************************************************
62 | (___ _ _______ _ __ ___ __| |_ _ ___| |_ _ ___ _ __
63 \___ \| |_ / _ \ | '__/ _ \/ _` | | | |/ __| __| |/ _ \| '_ \
64 ____) | |/ / __/ | | | __/ (_| | |_| | (__| |_| | (_) | | | |
65 |_____/|_/___\___| |_| \___|\__,_|\__,_|\___|\__|_|\___/|_| |_|
67 *****************************************************************************/
70 size_red_t *new_size_red(copy_opt_t *co) {
71 size_red_t *res = xmalloc(sizeof(*res));
74 res->all_removed = pset_new_ptr_default();
76 obstack_init(&res->ob);
82 * Checks if a node is simplicial in the graph heeding the already removed nodes.
84 static INLINE int sr_is_simplicial(size_red_t *sr, const ir_node *ifn) {
87 be_ifg_t *ifg = sr->co->cenv->ifg;
88 void *iter = be_ifg_neighbours_iter_alloca(ifg);
90 all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
92 /* get all non-removed neighbors */
93 be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
94 if (!sr_is_removed(sr, curr))
96 be_ifg_neighbours_break(ifg, iter);
98 /* check if these form a clique */
99 for (i=0; i<size; ++i)
100 for (o=i+1; o<size; ++o)
101 if (!be_ifg_connected(ifg, all[i], all[o]))
104 /* all edges exist so this is a clique */
108 void sr_remove(size_red_t *sr) {
111 const be_ifg_t *ifg = sr->co->cenv->ifg;
112 void *iter = be_ifg_nodes_iter_alloca(ifg);
116 be_ifg_foreach_node(ifg, iter, irn) {
117 arch_register_req_t req;
119 arch_get_register_req(sr->co->aenv, &req, irn, -1);
121 if (!arch_register_req_is(&req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {
122 if (sr_is_simplicial(sr, irn)) {
123 coloring_suffix_t *cs = obstack_alloc(&sr->ob, sizeof(*cs));
126 cs->next = sr->col_suff;
129 pset_insert_ptr(sr->all_removed, irn);
135 be_ifg_nodes_break(ifg, iter);
139 void sr_reinsert(size_red_t *sr) {
140 coloring_suffix_t *cs;
141 be_ifg_t *ifg = sr->co->cenv->ifg;
142 bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(sr->co->cls));
143 void *iter = be_ifg_neighbours_iter_alloca(ifg);
145 /* color the removed nodes in right order */
146 for (cs = sr->col_suff; cs; cs = cs->next) {
148 ir_node *other, *irn;
150 /* get free color by inspecting all neighbors */
152 bitset_clear_all(used_cols);
154 be_ifg_foreach_neighbour(ifg, iter, irn, other) {
155 if (!sr_is_removed(sr, other)) /* only inspect nodes which are in graph right now */
156 bitset_set(used_cols, get_irn_col(sr->co, other));
158 be_ifg_neighbours_break(ifg, iter);
160 /* now all bits not set are possible colors */
161 free_col = bitset_next_clear(used_cols, 0);
162 assert(free_col != -1 && "No free color found. This can not be.");
163 set_irn_col(sr->co, irn, free_col);
164 pset_remove_ptr(sr->all_removed, irn); /* irn is back in graph again */
168 void free_size_red(size_red_t *sr) {
169 del_pset(sr->all_removed);
170 obstack_free(&sr->ob, NULL);
174 /******************************************************************************
175 _____ _ _____ _ _____
176 / ____| (_) |_ _| | | __ \
177 | | __ ___ _ __ ___ _ __ _ ___ | | | | | |__) |
178 | | |_ |/ _ \ '_ \ / _ \ '__| |/ __| | | | | | ___/
179 | |__| | __/ | | | __/ | | | (__ _| |_| |____| |
180 \_____|\___|_| |_|\___|_| |_|\___| |_____|______|_|
182 *****************************************************************************/
186 ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env) {
187 ilp_env_t *res = xmalloc(sizeof(*res));
194 res->sr = new_size_red(co);
199 lpp_sol_state_t ilp_go(ilp_env_t *ienv) {
200 be_main_env_t *main_env = ienv->co->cenv->birg->main_env;
205 lpp_set_time_limit(ienv->lp, time_limit);
208 lpp_set_log(ienv->lp, stdout);
211 lpp_solve_net(ienv->lp, main_env->options->ilp_server, main_env->options->ilp_solver);
214 fprintf(stderr, "can only solve ilp over the net\n");
216 lpp_solve_cplex(ienv->lp);
220 be_stat_ev_dbl("co_ilp_objval", ienv->lp->objval);
221 be_stat_ev_dbl("co_ilp_best_bound", ienv->lp->best_bound);
222 be_stat_ev ("co_ilp_iter", ienv->lp->iterations);
223 be_stat_ev_dbl("co_ilp_sol_time", ienv->lp->sol_time);
225 if(dump_flags & DUMP_ILP) {
226 FILE *f = be_chordal_open(ienv->co->cenv, "", "-co.ilp");
227 lpp_dump_plain(ienv->lp, f);
233 sr_reinsert(ienv->sr);
235 return lpp_get_sol_state(ienv->lp);
238 void free_ilp_env(ilp_env_t *ienv) {
239 free_size_red(ienv->sr);
246 static INLINE void only_that_you_can_compile_without_WITH_ILP_defined(void) {
249 #endif /* WITH_ILP */