--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/java/FinalFieldBarrierNode.java 2017-02-15 17:07:37.789221930 -0800 @@ -0,0 +1,68 @@ +/* + * 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 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))); + } +}