1 /*
   2  * Copyright (c) 2019, 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.hotspot.test;
  26 
  27 import org.graalvm.compiler.core.test.GraalCompilerTest;
  28 import org.graalvm.compiler.java.BytecodeParserOptions;
  29 import org.graalvm.compiler.nodes.StructuredGraph;
  30 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
  31 import org.graalvm.compiler.nodes.java.MethodCallTargetNode;
  32 import org.graalvm.compiler.nodes.memory.ReadNode;
  33 import org.graalvm.compiler.options.OptionValues;
  34 import org.junit.Test;
  35 
  36 import jdk.vm.ci.meta.JavaTypeProfile;
  37 import jdk.vm.ci.meta.JavaTypeProfile.ProfiledType;
  38 import jdk.vm.ci.meta.MetaAccessProvider;
  39 import jdk.vm.ci.meta.ResolvedJavaMethod;
  40 import jdk.vm.ci.meta.TriState;
  41 
  42 public class ObjectHashCodeInliningTest extends GraalCompilerTest {
  43 
  44     public static int getHash(Object obj) {
  45         return obj.hashCode();
  46     }
  47 
  48     @Test
  49     public void testGetHash() {
  50         MetaAccessProvider metaAccess = getMetaAccess();
  51         ProfiledType[] injectedProfile = {
  52                         new ProfiledType(metaAccess.lookupJavaType(String.class), 0.9D),
  53                         new ProfiledType(metaAccess.lookupJavaType(Object.class), 0.1D)};
  54 
  55         ResolvedJavaMethod method = getResolvedJavaMethod("getHash");
  56         StructuredGraph graph = parseForCompile(method,
  57                         new OptionValues(getInitialOptions(), BytecodeParserOptions.InlineDuringParsing, false, BytecodeParserOptions.InlineIntrinsicsDuringParsing, false));
  58         for (MethodCallTargetNode callTargetNode : graph.getNodes(MethodCallTargetNode.TYPE)) {
  59             if ("Object.hashCode".equals(callTargetNode.targetName())) {
  60                 callTargetNode.setJavaTypeProfile(new JavaTypeProfile(TriState.FALSE, 0.0D, injectedProfile));
  61             }
  62         }
  63 
  64         compile(method, graph);
  65     }
  66 
  67     private static boolean containsForeignCallToIdentityHashCode(StructuredGraph graph) {
  68         for (ForeignCallNode foreignCallNode : graph.getNodes().filter(ForeignCallNode.class)) {
  69             if ("identity_hashcode".equals(foreignCallNode.getDescriptor().getName())) {
  70                 return true;
  71             }
  72         }
  73         return false;
  74     }
  75 
  76     private static boolean containsReadStringHash(StructuredGraph graph) {
  77         for (ReadNode readNode : graph.getNodes().filter(ReadNode.class)) {
  78             if ("String.hash".equals(readNode.getLocationIdentity().toString())) {
  79                 return true;
  80             }
  81         }
  82         return false;
  83     }
  84 
  85     @Override
  86     protected void checkHighTierGraph(StructuredGraph graph) {
  87         assert containsForeignCallToIdentityHashCode(graph) : "expected a foreign call to identity_hashcode";
  88         assert containsReadStringHash(graph) : "expected a read from String.hash";
  89     }
  90 
  91 }