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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package org.graalvm.compiler.loop.phases;

import org.graalvm.compiler.core.common.GraalOptions;
import org.graalvm.compiler.debug.CounterKey;
import org.graalvm.compiler.debug.DebugContext;
import org.graalvm.compiler.loop.LoopEx;
import org.graalvm.compiler.loop.LoopPolicies;
import org.graalvm.compiler.loop.LoopsData;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.spi.CoreProviders;
import org.graalvm.compiler.phases.common.CanonicalizerPhase;

public class LoopFullUnrollPhase extends LoopPhase<LoopPolicies> {

    private static final CounterKey FULLY_UNROLLED_LOOPS = DebugContext.counter("FullUnrolls");
    private final CanonicalizerPhase canonicalizer;

    public LoopFullUnrollPhase(CanonicalizerPhase canonicalizer, LoopPolicies policies) {
        super(policies);
        this.canonicalizer = canonicalizer;
    }

    @Override
    protected void run(StructuredGraph graph, CoreProviders context) {
        if (GraalOptions.FullUnroll.getValue(graph.getOptions())) {
            DebugContext debug = graph.getDebug();
            if (graph.hasLoops()) {
                boolean peeled;
                do {
                    peeled = false;
                    final LoopsData dataCounted = new LoopsData(graph);
                    dataCounted.detectedCountedLoops();
                    for (LoopEx loop : dataCounted.countedLoops()) {
                        if (getPolicies().shouldFullUnroll(loop)) {
                            debug.log("FullUnroll %s", loop);
                            LoopTransformations.fullUnroll(loop, context, canonicalizer);
                            FULLY_UNROLLED_LOOPS.increment(debug);
                            debug.dump(DebugContext.DETAILED_LEVEL, graph, "FullUnroll %s", loop);

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