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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/GetObjectAddressNode.java @ 6390:1e1c85d9ca7e

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moved Node classes into com.oracle.graal.hotspot.nodes package
author Doug Simon <doug.simon@oracle.com>
date Fri, 14 Sep 2012 13:32:04 +0200
parents graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/GetObjectAddressNode.java@a891c53a295b
children fb66841a0994
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1 /*
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2 * Copyright (c) 2012, 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.hotspot.nodes;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.nodes.*;
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27 import com.oracle.graal.nodes.spi.*;
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28 import com.oracle.graal.nodes.type.*;
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29
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30 /**
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31 * Intrinsification for getting the address of an object.
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32 * The code path(s) between a call to {@link #get(Object)} and all uses
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33 * of the returned value must be atomic. The only exception to this is
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34 * if the usage is not an attempt to dereference the value.
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35 */
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36 public class GetObjectAddressNode extends FixedWithNextNode implements LIRLowerable {
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37 @Input private ValueNode object;
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38
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39 public GetObjectAddressNode(ValueNode obj) {
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40 super(StampFactory.forKind(Kind.Long));
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41 this.object = obj;
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42 }
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43
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44 @SuppressWarnings("unused")
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45 @NodeIntrinsic
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46 public static long get(Object array) {
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47 throw new UnsupportedOperationException();
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48 }
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49
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50 @Override
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51 public void generate(LIRGeneratorTool gen) {
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52 Value obj = gen.newVariable(gen.target().wordKind);
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53 gen.emitMove(gen.operand(object), obj);
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54 gen.setResult(this, obj);
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55 }
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56 }