req = arch_get_register_req(sr->co->aenv, irn, -1);
if (!arch_register_req_is(req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {
req = arch_get_register_req(sr->co->aenv, irn, -1);
if (!arch_register_req_is(req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {