/*

 * Copyright (c) 2015, 2019, 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.

 *

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package org.graalvm.compiler.core.test;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.graalvm.compiler.nodes.EncodedGraph;

import org.graalvm.compiler.nodes.GraphEncoder;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;

import org.graalvm.compiler.nodes.spi.CoreProviders;

import org.graalvm.compiler.phases.common.CanonicalizerPhase;

import org.junit.Test;

import jdk.vm.ci.meta.ResolvedJavaMethod;

public class GraphEncoderTest extends GraalCompilerTest {

    @Test

    public void test01() {

        testStringMethods(false);

    }

    @Test

    public void test02() {

        testStringMethods(true);

    }

    public void testStringMethods(boolean canonicalize) {

        /* Encode and decode all methods of java.lang.String. */

        List<StructuredGraph> originalGraphs = new ArrayList<>();

        for (Method method : String.class.getDeclaredMethods()) {

            ResolvedJavaMethod javaMethod = getMetaAccess().lookupJavaMethod(method);

            if (javaMethod.hasBytecodes()) {

                StructuredGraph originalGraph = parseEager(javaMethod, AllowAssumptions.YES);

                if (canonicalize) {

                    CoreProviders context = getProviders();

                    new CanonicalizerPhase().apply(originalGraph, context);

                }

                originalGraphs.add(originalGraph);

            }

        }

        GraphEncoder encoder = new GraphEncoder(getTarget().arch);

        for (StructuredGraph originalGraph : originalGraphs) {

            encoder.prepare(originalGraph);

        }

        encoder.finishPrepare();

        Map<StructuredGraph, Integer> startOffsets = new HashMap<>();

        for (StructuredGraph originalGraph : originalGraphs) {

            startOffsets.put(originalGraph, encoder.encode(originalGraph));

        }

        for (StructuredGraph originalGraph : originalGraphs) {

            EncodedGraph encodedGraph = new EncodedGraph(encoder.getEncoding(), startOffsets.get(originalGraph), encoder.getObjects(), encoder.getNodeClasses(), originalGraph);

            encoder.verifyEncoding(originalGraph, encodedGraph);

        }

    }

}