/*
 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */


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.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();
                    createCanonicalizerPhase().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);
        }
    }
}
