/*
 * Copyright (c) 2012, 2012, 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.loop.phases;

import com.oracle.graal.api.code.*;
import com.oracle.graal.debug.*;
import com.oracle.graal.loop.*;
import com.oracle.graal.nodes.*;
import com.oracle.graal.nodes.spi.*;
import com.oracle.graal.phases.*;

public class LoopFullUnrollPhase extends Phase {

    private static final DebugMetric FULLY_UNROLLED_LOOPS = Debug.metric("FullUnrolls");
    private final GraalCodeCacheProvider runtime;
    private final Assumptions assumptions;

    public LoopFullUnrollPhase(GraalCodeCacheProvider runtime, Assumptions assumptions) {
        this.runtime = runtime;
        this.assumptions = assumptions;
    }

    @Override
    protected void run(StructuredGraph graph) {
        if (graph.hasLoops()) {
            boolean peeled;
            do {
                peeled = false;
                final LoopsData dataCounted = new LoopsData(graph);
                dataCounted.detectedCountedLoops();
                for (LoopEx loop : dataCounted.countedLoops()) {
                    if (LoopPolicies.shouldFullUnroll(loop)) {
                        Debug.log("FullUnroll %s", loop);
                        LoopTransformations.fullUnroll(loop, runtime, assumptions);
                        FULLY_UNROLLED_LOOPS.increment();
                        Debug.dump(graph, "After fullUnroll %s", loop);
                        peeled = true;
                        break;
                    }
                }
            } while (peeled);
        }
    }

}