+ keep = be_new_CopyKeep_single(cls, birg->irg, block, cpy, irn, get_irn_mode(other_different));
+ be_node_set_reg_class(keep, 1, cls);
+ edges_reroute(other_different, keep, birg->irg);
+ }
+
+ /* after rerouting: let the copy point to the other_different irn */
+ set_irn_n(cpy, 0, other_different);
+
+ DBG((mod, LEVEL_1, "created %+F for %+F to assure should_be_different\n", keep, irn));
+}
+
+/**
+ * Checks if node has a should_be_different constraint in output
+ * and adds a Keep then to assure the constraint.
+ */
+static void assure_different_constraints(ir_node *irn, be_irg_t *birg) {
+ const arch_env_t *arch_env = birg->main_env->arch_env;
+ const arch_register_req_t *req;
+ arch_register_req_t req_temp;
+ int i, n;
+
+ req = arch_get_register_req(arch_env, &req_temp, irn, -1);
+
+ if (req) {
+ if (arch_register_req_is(req, should_be_different)) {
+ gen_assure_different_pattern(irn, birg, req->other_different);
+ }
+ else if (arch_register_req_is(req, should_be_different_from_all)) {
+ n = get_irn_arity(belower_skip_proj(irn));
+ for (i = 0; i < n; i++) {
+ gen_assure_different_pattern(irn, birg, get_irn_n(belower_skip_proj(irn), i));
+ }
+ }