/*
 * Copyright (c) 2015, 2015, 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
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package com.oracle.graal.lir.phases;

import com.oracle.jvmci.code.TargetDescription;
import java.util.*;

import com.oracle.graal.compiler.common.cfg.*;
import com.oracle.graal.lir.gen.*;

public class LIRPhaseSuite<C> extends LIRPhase<C> {
    private final List<LIRPhase<C>> phases;

    public LIRPhaseSuite() {
        phases = new ArrayList<>();
    }

    /**
     * Add a new phase at the beginning of this suite.
     */
    public final void prependPhase(LIRPhase<C> phase) {
        phases.add(0, phase);
    }

    /**
     * Add a new phase at the end of this suite.
     */
    public final void appendPhase(LIRPhase<C> phase) {
        phases.add(phase);
    }

    public final ListIterator<LIRPhase<C>> findPhase(Class<? extends LIRPhase<C>> phaseClass) {
        ListIterator<LIRPhase<C>> it = phases.listIterator();
        if (findNextPhase(it, phaseClass)) {
            return it;
        } else {
            return null;
        }
    }

    public static <C> boolean findNextPhase(ListIterator<LIRPhase<C>> it, Class<? extends LIRPhase<C>> phaseClass) {
        while (it.hasNext()) {
            LIRPhase<C> phase = it.next();
            if (phaseClass.isInstance(phase)) {
                return true;
            }
        }
        return false;
    }

    @Override
    protected <B extends AbstractBlockBase<B>> void run(TargetDescription target, LIRGenerationResult lirGenRes, List<B> codeEmittingOrder, List<B> linearScanOrder, C context) {
        for (LIRPhase<C> phase : phases) {
            phase.apply(target, lirGenRes, codeEmittingOrder, linearScanOrder, context);
        }
    }

    public LIRPhaseSuite<C> copy() {
        LIRPhaseSuite<C> suite = new LIRPhaseSuite<>();
        suite.phases.addAll(phases);
        return suite;
    }
}