715 static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {  in constfolding()  argument
717   if (!isnumeral(e1) || !isnumeral(e2)) return 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()
726   e1->u.nval = r;  in constfolding()
732                        expdesc *e1, expdesc *e2, int line) {  in codearith()  argument
733   if (constfolding(op, e1, e2))  in codearith()
737     int o1 = luaK_exp2RK(fs, e1);  in codearith()
739       freeexp(fs, e1);  in codearith()
744       freeexp(fs, e1);  in codearith()
746     e1->u.info = luaK_codeABC(fs, op, 0, o1, o2);  in codearith()
747     e1->k = VRELOCABLE;  in codearith()
753 static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,  in codecomp()  argument
755   int o1 = luaK_exp2RK(fs, e1);  in codecomp()
758   freeexp(fs, e1);  in codecomp()
764   e1->u.info = condjump(fs, op, cond, o1, o2);  in codecomp()
765   e1->k = VJMP;  in codecomp()
821                   expdesc *e1, expdesc *e2, int line) {  in luaK_posfix()  argument
824       lua_assert(e1->t == NO_JUMP);  /* list must be closed */  in luaK_posfix()
826       luaK_concat(fs, &e2->f, e1->f);  in luaK_posfix()
827       *e1 = *e2;  in luaK_posfix()
831       lua_assert(e1->f == NO_JUMP);  /* list must be closed */  in luaK_posfix()
833       luaK_concat(fs, &e2->t, e1->t);  in luaK_posfix()
834       *e1 = *e2;  in luaK_posfix()
840         lua_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);  in luaK_posfix()
841         freeexp(fs, e1);  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()
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()