4 * Copyright: (c) Universitaet Karlsruhe
5 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
7 * Common stuff used by all ILP fomulations.
13 #endif /* HAVE_CONFIG_H */
20 static int time_limit = 60;
21 static int solve_net = 1;
22 static int dump_flags = 0;
25 #include <libcore/lc_opts.h>
26 #include <libcore/lc_opts_enum.h>
27 static const lc_opt_enum_mask_items_t dump_items[] = {
33 static lc_opt_enum_mask_var_t dump_var = {
34 &dump_flags, dump_items
37 static const lc_opt_table_entry_t options[] = {
38 LC_OPT_ENT_INT ("limit", "time limit for solving in seconds (0 for unlimited, default 60)", &time_limit),
39 LC_OPT_ENT_BOOL ("net", "solve over the net (default: yes)", &solve_net),
40 LC_OPT_ENT_ENUM_MASK("dump", "dump flags (ilp, sol)", &dump_var),
44 void be_co_ilp_register_options(lc_opt_entry_t *grp)
46 lc_opt_entry_t *ilp_grp = lc_opt_get_grp(grp, "ilp");
47 lc_opt_add_table(ilp_grp, options);
52 #include "becopyilp_t.h"
55 /******************************************************************************
58 | (___ _ _______ _ __ ___ __| |_ _ ___| |_ _ ___ _ __
59 \___ \| |_ / _ \ | '__/ _ \/ _` | | | |/ __| __| |/ _ \| '_ \
60 ____) | |/ / __/ | | | __/ (_| | |_| | (__| |_| | (_) | | | |
61 |_____/|_/___\___| |_| \___|\__,_|\__,_|\___|\__|_|\___/|_| |_|
63 *****************************************************************************/
66 size_red_t *new_size_red(copy_opt_t *co) {
67 size_red_t *res = xmalloc(sizeof(*res));
70 res->all_removed = pset_new_ptr_default();
72 obstack_init(&res->ob);
78 * Checks if a node is simplicial in the graph heeding the already removed nodes.
80 static INLINE int sr_is_simplicial(size_red_t *sr, const ir_node *ifn) {
83 be_ifg_t *ifg = sr->co->cenv->ifg;
84 void *iter = be_ifg_neighbours_iter_alloca(ifg);
86 all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
88 /* get all non-removed neighbors */
89 be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
90 if (!sr_is_removed(sr, curr))
92 be_ifg_neighbours_break(ifg, iter);
94 /* check if these form a clique */
95 for (i=0; i<size; ++i)
96 for (o=i+1; o<size; ++o)
97 if (!be_ifg_connected(ifg, all[i], all[o]))
100 /* all edges exist so this is a clique */
104 void sr_remove(size_red_t *sr) {
107 const be_ifg_t *ifg = sr->co->cenv->ifg;
108 void *iter = be_ifg_nodes_iter_alloca(ifg);
112 be_ifg_foreach_node(ifg, iter, irn) {
113 arch_register_req_t req;
115 arch_get_register_req(sr->co->aenv, &req, irn, -1);
117 if (!arch_register_req_is(&req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {
118 if (sr_is_simplicial(sr, irn)) {
119 coloring_suffix_t *cs = obstack_alloc(&sr->ob, sizeof(*cs));
122 cs->next = sr->col_suff;
125 pset_insert_ptr(sr->all_removed, irn);
131 be_ifg_nodes_break(ifg, iter);
135 void sr_reinsert(size_red_t *sr) {
136 coloring_suffix_t *cs;
137 be_ifg_t *ifg = sr->co->cenv->ifg;
138 bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(sr->co->cls));
139 void *iter = be_ifg_neighbours_iter_alloca(ifg);
141 /* color the removed nodes in right order */
142 for (cs = sr->col_suff; cs; cs = cs->next) {
144 ir_node *other, *irn;
146 /* get free color by inspecting all neighbors */
148 bitset_clear_all(used_cols);
150 be_ifg_foreach_neighbour(ifg, iter, irn, other) {
151 if (!sr_is_removed(sr, other)) /* only inspect nodes which are in graph right now */
152 bitset_set(used_cols, get_irn_col(sr->co, other));
154 be_ifg_neighbours_break(ifg, iter);
156 /* now all bits not set are possible colors */
157 free_col = bitset_next_clear(used_cols, 0);
158 assert(free_col != -1 && "No free color found. This can not be.");
159 set_irn_col(sr->co, irn, free_col);
160 pset_remove_ptr(sr->all_removed, irn); /* irn is back in graph again */
164 void free_size_red(size_red_t *sr) {
165 del_pset(sr->all_removed);
166 obstack_free(&sr->ob, NULL);
170 /******************************************************************************
171 _____ _ _____ _ _____
172 / ____| (_) |_ _| | | __ \
173 | | __ ___ _ __ ___ _ __ _ ___ | | | | | |__) |
174 | | |_ |/ _ \ '_ \ / _ \ '__| |/ __| | | | | | ___/
175 | |__| | __/ | | | __/ | | | (__ _| |_| |____| |
176 \_____|\___|_| |_|\___|_| |_|\___| |_____|______|_|
178 *****************************************************************************/
182 ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env) {
183 ilp_env_t *res = xmalloc(sizeof(*res));
190 res->sr = new_size_red(co);
195 lpp_sol_state_t ilp_go(ilp_env_t *ienv) {
196 be_main_env_t *main_env = ienv->co->cenv->birg->main_env;
201 lpp_set_time_limit(ienv->lp, time_limit);
204 lpp_solve_net(ienv->lp, main_env->options->ilp_server, main_env->options->ilp_solver);
207 fprintf(stderr, "can only solve ilp over the net\n");
209 lpp_solve_cplex(ienv->lp);
213 if(dump_flags & DUMP_ILP) {
214 FILE *f = be_chordal_open(ienv->co->cenv, "", "-co.ilp");
215 lpp_dump_plain(ienv->lp, f);
221 sr_reinsert(ienv->sr);
223 return lpp_get_sol_state(ienv->lp);
226 void free_ilp_env(ilp_env_t *ienv) {
227 free_size_red(ienv->sr);
234 static INLINE void only_that_you_can_compile_without_WITH_ILP_defined(void) {
237 #endif /* WITH_ILP */