*  @param rhs       The tree representing the right operand.
         *  @param operator  The operator symbol.
         */
        Item completeBinop(JCTree lhs, JCTree rhs, OperatorSymbol operator) {
            MethodType optype = (MethodType)operator.type;
            int opcode = operator.opcode;
            if (opcode >= if_icmpeq && opcode <= if_icmple &&
                rhs.type.constValue() instanceof Number &&
                ((Number) rhs.type.constValue()).intValue() == 0) {
                opcode = opcode + (ifeq - if_icmpeq);
            } else if (opcode >= if_acmpeq && opcode <= if_acmpne &&
                       TreeInfo.isNull(rhs)) {
                opcode = opcode + (if_acmp_null - if_acmpeq);
            } else {
                // The expected type of the right operand is
                // the second parameter type of the operator, except for
                // shifts with long shiftcount, where we convert the opcode
                // to a short shift and the expected type to int.
                Type rtype = operator.erasure(types).getParameterTypes().tail.head;
                if (opcode >= ishll && opcode <= lushrl) {
                    opcode = opcode + (ishl - ishll);
                    rtype = syms.intType;
                }
                // Generate code for right operand and load.
                genExpr(rhs, rtype).load();
                // If there are two consecutive opcode instructions,
                // emit the first now.
                if (opcode >= (1 << preShift)) {
                    code.emitop0(opcode >> preShift);
                    opcode = opcode & 0xFF;
                }
            }
            if (opcode >= ifeq && opcode <= if_acmpne ||
                opcode == if_acmp_null || opcode == if_acmp_nonnull) {
                return items.makeCondItem(opcode);
            } else {
                code.emitop0(opcode);
                return items.makeStackItem(optype.restype);
            }
        }