/*

 * Copyright (c) 1995, 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package sun.tools.tree;

import sun.tools.java.*;

import sun.tools.asm.Assembler;

import java.util.Hashtable;

/**

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

abstract public

class DivRemExpression extends BinaryArithmeticExpression {

    /**

     * constructor

     */

    public DivRemExpression(int op, long where, Expression left, Expression right) {

        super(op, where, left, right);

    }

    /**

     * Inline

     */

    public Expression inline(Environment env, Context ctx) {

        // Do not toss out integer divisions or remainders since they

        // can cause a division by zero.

        if (type.inMask(TM_INTEGER)) {

            right = right.inlineValue(env, ctx);

            if (right.isConstant() && !right.equals(0)) {

                // We know the division can be elided

                left = left.inline(env, ctx);

                return left;

            } else {

                left = left.inlineValue(env, ctx);

                try {

                    return eval().simplify();

                } catch (ArithmeticException e) {

                    env.error(where, "arithmetic.exception");

                    return this;

                }

            }

        } else {

            // float & double divisions don't cause arithmetic errors

            return super.inline(env, ctx);

        }

    }

}