/*

 * Copyright (c) 2011, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package org.graalvm.compiler.core.test.deopt;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.core.test.GraalCompilerTest;

import org.graalvm.compiler.nodes.ConstantNode;

import org.graalvm.compiler.nodes.StructuredGraph;

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

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

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

import org.junit.Assert;

import org.junit.Test;

import jdk.vm.ci.code.InstalledCode;

import jdk.vm.ci.code.InvalidInstalledCodeException;

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.ResolvedJavaMethod;

public class CompiledMethodTest extends GraalCompilerTest {

    public static Object testMethod(Object arg1, Object arg2, Object arg3) {

        String res = arg1 + " " + arg2 + " " + arg3;

        return GraalDirectives.inCompiledCode() ? res : "interpreter";

    }

    Object f1;

    public Object testMethodVirtual(Object arg1, Object arg2, Object arg3) {

        return f1 + " " + arg1 + " " + arg2 + " " + arg3;

    }

    /**

     * Usages of the constant {@code " "} are replaced with the constant {@code "-"} and it is

     * verified that executing the compiled code produces a result that the preserves the node

     * replacement unless deoptimization occurs (e.g., due to -Xcomp causing profiles to be

     * missing).

     */

    @Test

    public void test1() {

        final ResolvedJavaMethod javaMethod = getResolvedJavaMethod("testMethod");

        final StructuredGraph graph = parseEager(javaMethod, AllowAssumptions.NO);

        new CanonicalizerPhase().apply(graph, getProviders());

        new DeadCodeEliminationPhase().apply(graph);

        for (ConstantNode node : ConstantNode.getConstantNodes(graph)) {

            if (node.getStackKind() == JavaKind.Object && " ".equals(getSnippetReflection().asObject(String.class, node.asJavaConstant()))) {

                node.replace(graph, ConstantNode.forConstant(getSnippetReflection().forObject("-"), getMetaAccess(), graph));

            }

        }

        InstalledCode compiledMethod = getCode(javaMethod, graph, true);

        try {

            Object result = compiledMethod.executeVarargs("1", "2", "3");

            if (!"1-2-3".equals(result)) {

                // Deoptimization probably occurred

                Assert.assertEquals("interpreter", result);

            }

        } catch (InvalidInstalledCodeException t) {

            Assert.fail("method invalidated");

        }

    }

    @Test

    public void test3() {

        final ResolvedJavaMethod javaMethod = getResolvedJavaMethod("testMethod");

        InstalledCode compiledMethod = getCode(javaMethod);

        try {

            Object result = compiledMethod.executeVarargs("1", "2", "3");

            Assert.assertEquals("1 2 3", result);

        } catch (InvalidInstalledCodeException t) {

            Assert.fail("method invalidated");

        }

    }

    @Test

    public void test4() {

        final ResolvedJavaMethod javaMethod = getResolvedJavaMethod("testMethodVirtual");

        InstalledCode compiledMethod = getCode(javaMethod);

        try {

            f1 = "0";

            Object result = compiledMethod.executeVarargs(this, "1", "2", "3");

            Assert.assertEquals("0 1 2 3", result);

        } catch (InvalidInstalledCodeException t) {

            Assert.fail("method invalidated");

        }

    }

}