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/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.core.test;
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import java.util.List;
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import org.graalvm.compiler.core.common.CompilationIdentifier;
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import org.graalvm.compiler.graph.Node;
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import org.graalvm.compiler.nodes.ConstantNode;
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import org.graalvm.compiler.nodes.Invoke;
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import org.graalvm.compiler.nodes.InvokeNode;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
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import org.graalvm.compiler.nodes.ValueNode;
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import org.graalvm.compiler.nodes.extended.OpaqueNode;
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import org.graalvm.compiler.nodes.extended.LoadHubNode;
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import org.graalvm.compiler.nodes.extended.LoadMethodNode;
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import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
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import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
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import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin.Receiver;
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import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins;
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import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration;
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import org.graalvm.compiler.options.OptionValues;
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import org.junit.Assert;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import jdk.vm.ci.meta.JavaKind;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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/**
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* Tests use of an intrinsic for virtual methods where the call site is indirect. A prime example is
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* an intrinsic for {@link Object#hashCode()}. The intrinsic can only be used if the call site would
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* actually dispatch to {@link Object#hashCode()} and not a method that overrides it.
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*/
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public class GuardedIntrinsicTest extends GraalCompilerTest {
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static class Super {
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int getAge() {
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return 11;
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}
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}
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public static class Person extends Super {
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int age;
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public Person(int age) {
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this.age = age;
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}
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@Override
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public int getAge() {
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return age;
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}
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}
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@BytecodeParserForceInline
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public static final Super createSuper() {
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return new Super();
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}
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@BytecodeParserNeverInline
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public static final Super createPerson() {
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return new Person(42);
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}
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public static int getSuperAge(Super s) {
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return s.getAge();
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}
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public static int getPersonAge(Person p) {
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return p.getAge();
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}
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public static int makeSuperAge() {
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return createSuper().getAge();
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}
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public static int makePersonAge() {
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return createPerson().getAge();
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}
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@BeforeClass
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public static void init() {
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// Ensure classes are initialized
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new Person(0).toString();
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}
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private StructuredGraph graph;
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private StructuredGraph parsedForCompile;
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@Override
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protected StructuredGraph parseForCompile(ResolvedJavaMethod method, CompilationIdentifier compilationId, OptionValues options) {
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graph = super.parseForCompile(method, compilationId, options);
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parsedForCompile = (StructuredGraph) graph.copy(graph.getDebug());
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return graph;
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}
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@Override
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protected void registerInvocationPlugins(InvocationPlugins invocationPlugins) {
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Registration r = new Registration(invocationPlugins, Super.class);
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r.register1("getAge", Receiver.class, new InvocationPlugin() {
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@Override
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public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver) {
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ConstantNode res = b.add(ConstantNode.forInt(new Super().getAge()));
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b.add(new OpaqueNode(res));
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b.push(JavaKind.Int, res);
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return true;
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}
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});
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super.registerInvocationPlugins(invocationPlugins);
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}
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public static int referenceMakeSuperAge() {
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return 11;
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}
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public static int referenceMakePersonAge() {
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return 42;
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}
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@Test
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public void test01() {
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Super inheritsHC = new Super();
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Person overridesHC = new Person(0);
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// Ensure the profile for getSuperAge includes both receiver types
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getSuperAge(inheritsHC);
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getSuperAge(overridesHC);
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test("getSuperAge", inheritsHC);
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test("getSuperAge", overridesHC);
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// Check that the virtual dispatch test exists after bytecode parsing
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Assert.assertEquals(1, parsedForCompile.getNodes().filter(LoadMethodNode.class).count());
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Assert.assertEquals(1, parsedForCompile.getNodes().filter(LoadHubNode.class).count());
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// Check for the marker node indicating the intrinsic was applied
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Assert.assertEquals(1, parsedForCompile.getNodes().filter(OpaqueNode.class).count());
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// Final graph should have a single invoke
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List<Node> invokes = graph.getNodes().filter(n -> n instanceof Invoke).snapshot();
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Assert.assertEquals(invokes.toString(), 1, invokes.size());
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}
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@Test
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public void test02() {
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test("getPersonAge", new Person(0));
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// Check that the virtual dispatch test does not exist after bytecode parsing
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Assert.assertEquals(0, parsedForCompile.getNodes().filter(LoadMethodNode.class).count());
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Assert.assertEquals(0, parsedForCompile.getNodes().filter(LoadHubNode.class).count());
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Assert.assertEquals(0, parsedForCompile.getNodes().filter(InvokeNode.class).count());
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}
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@Test
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public void test03() {
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test("makeSuperAge");
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// Check that the virtual dispatch test does not exist after bytecode parsing
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Assert.assertEquals(0, parsedForCompile.getNodes().filter(LoadMethodNode.class).count());
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Assert.assertEquals(0, parsedForCompile.getNodes().filter(LoadHubNode.class).count());
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StructuredGraph referenceGraph = parseEager("referenceMakeSuperAge", AllowAssumptions.NO);
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assertEquals(referenceGraph, graph, true, true);
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}
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@Test
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public void test04() {
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test("makePersonAge");
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// Check that the virtual dispatch test exists after bytecode parsing
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Assert.assertEquals(1, parsedForCompile.getNodes().filter(LoadMethodNode.class).count());
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Assert.assertEquals(1, parsedForCompile.getNodes().filter(LoadHubNode.class).count());
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StructuredGraph referenceGraph = parseEager("referenceMakePersonAge", AllowAssumptions.NO);
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assertEquals(referenceGraph, graph, true, true);
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}
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static final class ReadCacheEntry {
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public final Object identity;
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public final ValueNode object;
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ReadCacheEntry(Object identity, ValueNode object) {
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this.identity = identity;
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this.object = object;
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}
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@Override
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public int hashCode() {
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int result = ((identity == null) ? 0 : identity.hashCode());
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return result + System.identityHashCode(object);
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}
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}
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public static int getHashCode(ReadCacheEntry obj) {
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return obj.hashCode();
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}
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@Test
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public void test05() {
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ReadCacheEntry val1 = new ReadCacheEntry("identity", ConstantNode.forBoolean(false));
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ReadCacheEntry val2 = new ReadCacheEntry(Integer.valueOf(34), ConstantNode.forInt(42));
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for (int i = 0; i < 10000; i++) {
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getHashCode(val2);
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}
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test("getHashCode", val1);
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}
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}
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