- const be_chordal_env_t *chordal_env = qn->ou->co->chordal_env;
- const arch_register_class_t *cls = chordal_env->cls;
- const arch_env_t *arch_env = chordal_env->main_env->arch_env;
+ copy_opt_t *co = qn->ou->co;
+ const be_chordal_env_t *chordal_env = co->cenv;
+ const arch_register_class_t *cls = co->cls;
+ const arch_env_t *arch_env = co->aenv;