| /* |
| * Copyright (c) 2016, 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.nodes.java; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_20; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2; |
| import static jdk.vm.ci.code.MemoryBarriers.LOAD_STORE; |
| import static jdk.vm.ci.code.MemoryBarriers.STORE_STORE; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.FixedWithNextNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.extended.MembarNode; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.spi.Virtualizable; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; |
| |
| @NodeInfo(cycles = CYCLES_20, size = SIZE_2) |
| public class FinalFieldBarrierNode extends FixedWithNextNode implements Virtualizable, Lowerable { |
| public static final NodeClass<FinalFieldBarrierNode> TYPE = NodeClass.create(FinalFieldBarrierNode.class); |
| |
| @Input private ValueNode value; |
| |
| public FinalFieldBarrierNode(ValueNode value) { |
| super(TYPE, StampFactory.forVoid()); |
| this.value = value; |
| } |
| |
| public ValueNode getValue() { |
| return value; |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| if (tool.getAlias(value) instanceof VirtualObjectNode) { |
| tool.delete(); |
| } |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| graph().replaceFixedWithFixed(this, graph().add(new MembarNode(LOAD_STORE | STORE_STORE))); |
| } |
| } |