- const arch_register_t *reg;
- const arch_register_class_t *cls;
- unsigned reg_idx;
- unsigned cls_idx;
-
- DBG((dbg, LEVEL_1, "About to exchange %+F with %+F\n", old_node, new_node));
-
- if (old_node == current_node) {
- if (is_Proj(new_node)) {
- current_node = get_Proj_pred(new_node);
- } else {
- current_node = new_node;
- }
- }
-
- if (!mode_is_data(get_irn_mode(old_node)))
- return;
-
- reg = arch_get_irn_register(arch_env, old_node);
- if (reg == NULL) {
- panic("No register assigned at %+F\n", old_node);
- }
- cls = arch_register_get_class(reg);
- reg_idx = arch_register_get_index(reg);
- cls_idx = arch_register_class_index(cls);
-
- if (register_values[cls_idx][reg_idx] == old_node) {
- register_values[cls_idx][reg_idx] = new_node;
- }
-
- be_liveness_remove(lv, old_node);