+typedef struct _local_env_t {
+ firm_dbg_module_t *dbg;
+ double time_limit;
+ int first_x_var, last_x_var;
+ pmap *nr_2_irn;
+} local_env_t;
+
+static void build_coloring_cstr(ilp_env_t *ienv) {
+ be_ifg_t *ifg = ienv->co->cenv->ifg;
+ void *iter = be_ifg_nodes_iter_alloca(ifg);
+ bitset_t *colors;
+ ir_node *irn;
+ char buf[16];
+
+ colors = bitset_alloca(arch_register_class_n_regs(ienv->co->cls));
+
+ be_ifg_foreach_node(ifg, iter, irn)
+ if (!sr_is_removed(ienv->sr, irn)) {
+ int col, cst_idx;
+ arch_register_req_t req;
+ int curr_node_color = get_irn_col(ienv->co, irn);
+ int node_nr = (int)get_irn_node_nr(irn);
+ local_env_t *lenv = ienv->env;
+
+ pmap_insert(lenv->nr_2_irn, INT_TO_PTR(node_nr), irn);
+
+ arch_get_register_req(ienv->co->aenv, &req, irn, -1);
+
+ /* get assignable colors */
+ if (arch_register_req_is(&req, limited))
+ req.limited(req.limited_env, colors);
+ else
+ arch_put_non_ignore_regs(ienv->co->aenv, req.cls, colors);
+
+ /* add the coloring constraint */
+ cst_idx = lpp_add_cst(ienv->lp, NULL, lpp_equal, 1.0);
+
+ bitset_foreach(colors, col) {
+ int var_idx = lpp_add_var(ienv->lp, name_cdd(buf, 'x', node_nr, col), lpp_binary, 0.0);
+ lpp_set_start_value(ienv->lp, var_idx, (col == curr_node_color) ? 1.0 : 0.0);
+ lpp_set_factor_fast(ienv->lp, cst_idx, var_idx, 1);
+
+ lenv->last_x_var = var_idx;
+ if (lenv->first_x_var == -1)
+ lenv->first_x_var = var_idx;
+ }
+
+ /* add register constraint constraints */
+ bitset_foreach_clear(colors, col) {
+ int cst_idx = lpp_add_cst(ienv->lp, NULL, lpp_equal, 0.0);
+ int var_idx = lpp_add_var(ienv->lp, name_cdd(buf, 'x', node_nr, col), lpp_binary, 0.0);
+ lpp_set_start_value(ienv->lp, var_idx, 0.0);
+ lpp_set_factor_fast(ienv->lp, cst_idx, var_idx, 1);
+
+ lenv->last_x_var = var_idx;
+ }
+ }
+}
+
+static void build_interference_cstr(ilp_env_t *ienv) {
+ lpp_t *lpp = ienv->lp;
+ be_ifg_t *ifg = ienv->co->cenv->ifg;
+ int n_colors = arch_register_class_n_regs(ienv->co->cls);
+ int i, col;
+
+ void *iter = be_ifg_cliques_iter_alloca(ifg);
+ ir_node **clique = alloca(sizeof(*clique) * n_colors);
+ int size;
+
+ char buf[16];
+
+ /* for each maximal clique */
+ be_ifg_foreach_clique(ifg, iter, clique, &size) {
+
+ if (size < 2)
+ continue;
+
+ /* for all colors */
+ for (col=0; col<n_colors; ++col) {
+ int cst_idx = lpp_add_cst(lpp, NULL, lpp_less, 1.0);
+
+ /* for each member of this clique */
+ for (i=0; i<size; ++i) {
+ ir_node *irn = clique[i];
+
+ if (!sr_is_removed(ienv->sr, irn)) {
+ int var_idx = lpp_get_var_idx(lpp, name_cdd(buf, 'x', (int)get_irn_node_nr(irn), col));
+ lpp_set_factor_fast(lpp, cst_idx, var_idx, 1);
+ }
+ }
+ }
+ }
+}
+
+static void build_affinity_cstr(ilp_env_t *ienv) {
+ unit_t *curr;
+ int n_colors = arch_register_class_n_regs(ienv->co->cls);
+
+ /* for all optimization units */
+ list_for_each_entry(unit_t, curr, &ienv->co->units, units) {
+ ir_node *root, *arg;
+ int root_nr, arg_nr, i, col, y_idx, root_idx, arg_idx;
+ char buf[16];
+ int root_col, arg_col;
+
+ root = curr->nodes[0];
+ root_nr = (int) get_irn_node_nr(root);
+ root_col = get_irn_col(ienv->co, root);