--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/MethodHandlePlugin.java 2017-02-15 17:09:07.833164185 -0800 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2015, 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 + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.replacements; + +import org.graalvm.compiler.core.common.type.StampPair; +import org.graalvm.compiler.graph.NodeInputList; +import org.graalvm.compiler.nodes.CallTargetNode; +import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind; +import org.graalvm.compiler.nodes.InvokeNode; +import org.graalvm.compiler.nodes.ValueNode; +import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; +import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin; +import org.graalvm.compiler.replacements.nodes.MethodHandleNode; + +import jdk.vm.ci.meta.JavaKind; +import jdk.vm.ci.meta.MethodHandleAccessProvider; +import jdk.vm.ci.meta.MethodHandleAccessProvider.IntrinsicMethod; +import jdk.vm.ci.meta.ResolvedJavaMethod; + +public class MethodHandlePlugin implements NodePlugin { + private final MethodHandleAccessProvider methodHandleAccess; + private final boolean safeForDeoptimization; + + public MethodHandlePlugin(MethodHandleAccessProvider methodHandleAccess, boolean safeForDeoptimization) { + this.methodHandleAccess = methodHandleAccess; + this.safeForDeoptimization = safeForDeoptimization; + } + + @Override + public boolean handleInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) { + IntrinsicMethod intrinsicMethod = methodHandleAccess.lookupMethodHandleIntrinsic(method); + if (intrinsicMethod != null) { + InvokeKind invokeKind = b.getInvokeKind(); + if (invokeKind != InvokeKind.Static) { + args[0] = b.nullCheckedValue(args[0]); + } + StampPair invokeReturnStamp = b.getInvokeReturnStamp(b.getAssumptions()); + InvokeNode invoke = MethodHandleNode.tryResolveTargetInvoke(b.getAssumptions(), b.getConstantReflection().getMethodHandleAccess(), intrinsicMethod, method, b.bci(), invokeReturnStamp, + args); + if (invoke == null) { + MethodHandleNode methodHandleNode = new MethodHandleNode(intrinsicMethod, invokeKind, method, b.bci(), invokeReturnStamp, args); + if (invokeReturnStamp.getTrustedStamp().getStackKind() == JavaKind.Void) { + b.add(methodHandleNode); + } else { + b.addPush(invokeReturnStamp.getTrustedStamp().getStackKind(), methodHandleNode); + } + } else { + CallTargetNode callTarget = invoke.callTarget(); + NodeInputList argumentsList = callTarget.arguments(); + for (int i = 0; i < argumentsList.size(); ++i) { + argumentsList.initialize(i, b.recursiveAppend(argumentsList.get(i))); + } + + boolean inlineEverything = false; + if (safeForDeoptimization) { + // If a MemberName suffix argument is dropped, the replaced call cannot + // deoptimized since the necessary frame state cannot be reconstructed. + // As such, it needs to recursively inline everything. + inlineEverything = args.length != argumentsList.size(); + } + b.handleReplacedInvoke(invoke.getInvokeKind(), callTarget.targetMethod(), argumentsList.toArray(new ValueNode[argumentsList.size()]), inlineEverything); + } + return true; + } + return false; + } +}