715 static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {  in constfolding()  argument
717   if (!isnumeral(e1) || !isnumeral(e2)) return 0;  in constfolding()
718   if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)  in constfolding()
723   if (op == OP_DIV && e1->u.nval == INT64_MIN && e2->u.nval == -1)  in constfolding()
725   r = luaO_arith(op - OP_ADD + LUA_OPADD, e1->u.nval, e2->u.nval);  in constfolding()
732                        expdesc *e1, expdesc *e2, int line) {  in codearith()  argument
733   if (constfolding(op, e1, e2))  in codearith()
736     int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0;  in codearith()
740       freeexp(fs, e2);  in codearith()
743       freeexp(fs, e2);  in codearith()
754                                                           expdesc *e2) {  in codecomp()  argument
756   int o2 = luaK_exp2RK(fs, e2);  in codecomp()
757   freeexp(fs, e2);  in codecomp()
770   expdesc e2;  in luaK_prefix()  local
771   e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;  in luaK_prefix()
778         codearith(fs, OP_UNM, e, &e2, line);  in luaK_prefix()
785       codearith(fs, OP_LEN, e, &e2, line);  in luaK_prefix()
821                   expdesc *e1, expdesc *e2, int line) {  in luaK_posfix()  argument
825       luaK_dischargevars(fs, e2);  in luaK_posfix()
826       luaK_concat(fs, &e2->f, e1->f);  in luaK_posfix()
827       *e1 = *e2;  in luaK_posfix()
832       luaK_dischargevars(fs, e2);  in luaK_posfix()
833       luaK_concat(fs, &e2->t, e1->t);  in luaK_posfix()
834       *e1 = *e2;  in luaK_posfix()
838       luaK_exp2val(fs, e2);  in luaK_posfix()
839       if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {  in luaK_posfix()
840         lua_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);  in luaK_posfix()
842         SETARG_B(getcode(fs, e2), e1->u.info);  in luaK_posfix()
843         e1->k = VRELOCABLE; e1->u.info = e2->u.info;  in luaK_posfix()
846         luaK_exp2nextreg(fs, e2);  /* operand must be on the 'stack' */  in luaK_posfix()
847         codearith(fs, OP_CONCAT, e1, e2, line);  in luaK_posfix()
853       codearith(fs, cast(OpCode, op - OPR_ADD + OP_ADD), e1, e2, line);  in luaK_posfix()
857       codecomp(fs, cast(OpCode, op - OPR_EQ + OP_EQ), 1, e1, e2);  in luaK_posfix()
861       codecomp(fs, cast(OpCode, op - OPR_NE + OP_EQ), 0, e1, e2);  in luaK_posfix()