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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/MembarNode.java @ 5167:591f8231aa82

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removed XIR & LIR code for nodes that are completely lowered in HotspotRuntime.lower() separated out the GC write barrier from CompareAndSwapNode in HotspotRuntime.lower() inserted membars for volatile field read/write in HotspotRuntime.lower()
author Doug Simon <doug.simon@oracle.com>
date Wed, 28 Mar 2012 14:31:56 +0200
parents e808627bd16f
children d42425beb1d1
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.nodes.extended;
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25 import com.oracle.graal.nodes.*;
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26 import com.oracle.graal.nodes.spi.*;
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27 import com.oracle.graal.nodes.type.*;
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28 import com.oracle.max.cri.util.*;
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29
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30 /**
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31 * Creates a memory barrier.
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32 */
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33 public class MembarNode extends AbstractStateSplit implements LIRLowerable, MemoryCheckpoint {
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35 private final int barriers;
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36
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37 /**
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38 * @param barriers a mask of the barrier constants defined in {@link MemoryBarriers}
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39 */
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40 public MembarNode(int barriers) {
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41 super(StampFactory.illegal());
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42 this.barriers = barriers;
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43 }
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44
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45 @Override
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46 public void generate(LIRGeneratorTool generator) {
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47 generator.emitMembar(barriers);
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48 }
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49
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50 @SuppressWarnings("unused")
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51 @NodeIntrinsic
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52 public static void get(@ConstantNodeParameter int barriers) {
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53 throw new UnsupportedOperationException("This method may only be compiled with the Graal compiler");
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54 }
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55 }