/*
 * Copyright (c) 2013, 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.
 *
 * 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.graal.hotspot.phases;

import com.oracle.graal.api.meta.*;
import com.oracle.graal.nodes.*;
import com.oracle.graal.phases.*;

public class AheadOfTimeVerifcationPhase extends VerifyPhase {

    @Override
    protected boolean verify(StructuredGraph graph) {
        for (ConstantNode node : graph.getNodes().filter(ConstantNode.class)) {
            assert !isOop(node) || isNullReference(node) || isString(node) : "embedded oop: " + node + ". toString: " + node.asConstant().asObject();
        }
        return true;
    }

    private static boolean isOop(ConstantNode node) {
        return node.kind() == Kind.Object;
    }

    private static boolean isNullReference(ConstantNode node) {
        return isOop(node) && node.asConstant().asObject() == null;
    }

    private static boolean isString(ConstantNode node) {
        return isOop(node) && node.asConstant().asObject() instanceof String;
    }
}