Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/RegisterFinalizerNode.java @ 22349:681c04ce9db2
PEA refactoring: simplify VirtualizerTool, arrays instead of HashMaps, route all modifications through BlockState, copy-on-write in BlockState
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Fri, 24 Jul 2015 16:20:56 +0200 |
parents | e02fa353e88c |
children | 0e912e7580f9 |
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/* * Copyright (c) 2011, 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 com.oracle.graal.nodes.java; import static com.oracle.graal.nodes.java.ForeignCallDescriptors.*; import jdk.internal.jvmci.meta.*; import jdk.internal.jvmci.meta.Assumptions.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.compiler.common.spi.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.virtual.*; /** * This node is used to perform the finalizer registration at the end of the java.lang.Object * constructor. */ @NodeInfo public final class RegisterFinalizerNode extends AbstractStateSplit implements Canonicalizable.Unary<ValueNode>, LIRLowerable, Virtualizable, DeoptimizingNode.DeoptAfter { public static final NodeClass<RegisterFinalizerNode> TYPE = NodeClass.create(RegisterFinalizerNode.class); @OptionalInput(InputType.State) FrameState deoptState; @Input ValueNode value; public RegisterFinalizerNode(ValueNode value) { super(TYPE, StampFactory.forVoid()); this.value = value; } public ValueNode getValue() { return value; } @Override public void generate(NodeLIRBuilderTool gen) { ForeignCallLinkage linkage = gen.getLIRGeneratorTool().getForeignCalls().lookupForeignCall(REGISTER_FINALIZER); gen.getLIRGeneratorTool().emitForeignCall(linkage, gen.state(this), gen.operand(getValue())); } /** * Determines if the compiler should emit code to test whether a given object has a finalizer * that must be registered with the runtime upon object initialization. */ public static boolean mayHaveFinalizer(ValueNode object, Assumptions assumptions) { ObjectStamp objectStamp = (ObjectStamp) object.stamp(); if (objectStamp.isExactType()) { return objectStamp.type().hasFinalizer(); } else if (objectStamp.type() != null) { AssumptionResult<Boolean> result = objectStamp.type().hasFinalizableSubclass(); if (result.isAssumptionFree()) { return result.getResult(); } else if (assumptions != null) { assumptions.record(result); return result.getResult(); } } return true; } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (!(forValue.stamp() instanceof ObjectStamp)) { return this; } if (!mayHaveFinalizer(forValue, graph().getAssumptions())) { return null; } return this; } @Override public void virtualize(VirtualizerTool tool) { ValueNode alias = tool.getAlias(getValue()); if (alias instanceof VirtualObjectNode && !((VirtualObjectNode) alias).type().hasFinalizer()) { tool.delete(); } } @Override public boolean canDeoptimize() { return true; } @NodeIntrinsic public static native void register(Object thisObj); }