1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.replacements.test; 26 27 import org.graalvm.compiler.api.directives.GraalDirectives; 28 import org.graalvm.compiler.api.replacements.ClassSubstitution; 29 import org.graalvm.compiler.api.replacements.Fold; 30 import org.graalvm.compiler.api.replacements.MethodSubstitution; 31 import org.graalvm.compiler.bytecode.BytecodeProvider; 32 import org.graalvm.compiler.nodes.ReturnNode; 33 import org.graalvm.compiler.nodes.StartNode; 34 import org.graalvm.compiler.nodes.StructuredGraph; 35 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins; 36 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration; 37 import org.graalvm.compiler.nodes.graphbuilderconf.NodeIntrinsicPluginFactory.InjectionProvider; 38 import org.graalvm.compiler.replacements.NodeIntrinsificationProvider; 39 import org.junit.Test; 40 41 public class FoldTest extends ReplacementsTest { 42 43 private static class TestMethod { 44 45 public static int test() { 46 return 42; 47 } 48 } 49 50 static class FoldUtils { 51 52 private int number; 53 54 FoldUtils(int number) { 55 this.number = number; 56 } 57 58 @Fold 59 static int multiply(int a, int b) { 60 // we want to test whether @Fold works, so prevent automatic constant folding 61 return a * GraalDirectives.opaque(b); 62 } 63 64 @Fold 65 int getNumber() { 66 // we want to test whether @Fold works, so prevent automatic constant folding 67 return GraalDirectives.opaque(number); 68 } 69 } 70 71 @ClassSubstitution(TestMethod.class) 72 private static class TestMethodSubstitution { 73 74 private static final FoldUtils utils = new FoldUtils(21); 75 76 @MethodSubstitution 77 public static int test() { 78 return FoldUtils.multiply(utils.getNumber(), 2); 79 } 80 } 81 82 @Override 83 protected void registerInvocationPlugins(InvocationPlugins invocationPlugins) { 84 InjectionProvider injection = new NodeIntrinsificationProvider(getMetaAccess(), getSnippetReflection(), getProviders().getForeignCalls(), getProviders().getLowerer(), null); 85 new PluginFactory_FoldTest().registerPlugins(invocationPlugins, injection); 86 BytecodeProvider replacementBytecodeProvider = getSystemClassLoaderBytecodeProvider(); 87 Registration r = new Registration(invocationPlugins, TestMethod.class, replacementBytecodeProvider); 88 r.registerMethodSubstitution(TestMethodSubstitution.class, "test"); 89 super.registerInvocationPlugins(invocationPlugins); 90 } 91 92 public static int callTest() { 93 return TestMethod.test(); 94 } 95 96 @Override 97 protected boolean checkHighTierGraph(StructuredGraph graph) { 98 // check that folding happened correctly 99 StartNode start = graph.start(); 100 assert start.next() instanceof ReturnNode : "expected ReturnNode, got " + start.next(); 101 102 ReturnNode ret = (ReturnNode) start.next(); 103 assert ret.result().isConstant() : "expected ConstantNode, got " + ret.result(); 104 return true; 105 } 106 107 @Test 108 public void snippetTest() { 109 test("callTest"); 110 } 111 }