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 package org.graalvm.compiler.replacements;
  24 
  25 import org.graalvm.compiler.core.common.type.StampPair;
  26 import org.graalvm.compiler.graph.NodeInputList;
  27 import org.graalvm.compiler.nodes.CallTargetNode;
  28 import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind;
  29 import org.graalvm.compiler.nodes.InvokeNode;
  30 import org.graalvm.compiler.nodes.ValueNode;
  31 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  32 import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin;
  33 import org.graalvm.compiler.replacements.nodes.MethodHandleNode;
  34 
  35 import jdk.vm.ci.meta.JavaKind;
  36 import jdk.vm.ci.meta.MethodHandleAccessProvider;
  37 import jdk.vm.ci.meta.MethodHandleAccessProvider.IntrinsicMethod;
  38 import jdk.vm.ci.meta.ResolvedJavaMethod;
  39 
  40 public class MethodHandlePlugin implements NodePlugin {
  41     private final MethodHandleAccessProvider methodHandleAccess;
  42     private final boolean safeForDeoptimization;
  43 
  44     public MethodHandlePlugin(MethodHandleAccessProvider methodHandleAccess, boolean safeForDeoptimization) {
  45         this.methodHandleAccess = methodHandleAccess;
  46         this.safeForDeoptimization = safeForDeoptimization;
  47     }
  48 
  49     @Override
  50     public boolean handleInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) {
  51         IntrinsicMethod intrinsicMethod = methodHandleAccess.lookupMethodHandleIntrinsic(method);
  52         if (intrinsicMethod != null) {
  53             InvokeKind invokeKind = b.getInvokeKind();
  54             if (invokeKind != InvokeKind.Static) {
  55                 args[0] = b.nullCheckedValue(args[0]);
  56             }
  57             StampPair invokeReturnStamp = b.getInvokeReturnStamp(b.getAssumptions());
  58             InvokeNode invoke = MethodHandleNode.tryResolveTargetInvoke(b.getAssumptions(), b.getConstantReflection().getMethodHandleAccess(), intrinsicMethod, method, b.bci(), invokeReturnStamp,
  59                             args);
  60             if (invoke == null) {
  61                 MethodHandleNode methodHandleNode = new MethodHandleNode(intrinsicMethod, invokeKind, method, b.bci(), invokeReturnStamp, args);
  62                 if (invokeReturnStamp.getTrustedStamp().getStackKind() == JavaKind.Void) {
  63                     b.add(methodHandleNode);
  64                 } else {
  65                     b.addPush(invokeReturnStamp.getTrustedStamp().getStackKind(), methodHandleNode);
  66                 }
  67             } else {
  68                 CallTargetNode callTarget = invoke.callTarget();
  69                 NodeInputList<ValueNode> argumentsList = callTarget.arguments();
  70                 for (int i = 0; i < argumentsList.size(); ++i) {
  71                     argumentsList.initialize(i, b.recursiveAppend(argumentsList.get(i)));
  72                 }
  73 
  74                 boolean inlineEverything = false;
  75                 if (safeForDeoptimization) {
  76                     // If a MemberName suffix argument is dropped, the replaced call cannot
  77                     // deoptimized since the necessary frame state cannot be reconstructed.
  78                     // As such, it needs to recursively inline everything.
  79                     inlineEverything = args.length != argumentsList.size();
  80                 }
  81                 b.handleReplacedInvoke(invoke.getInvokeKind(), callTarget.targetMethod(), argumentsList.toArray(new ValueNode[argumentsList.size()]), inlineEverything);
  82             }
  83             return true;
  84         }
  85         return false;
  86     }
  87 }