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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/NullCheckNode.java @ 15001:27c04ee36dcb

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author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 07 Apr 2014 11:32:04 +0200
parents d5a1206e1923
children e60ea0bf468d
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1 /*
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2 * Copyright (c) 2013, 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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24
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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
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29 public class NullCheckNode extends DeoptimizingFixedWithNextNode implements LIRLowerable {
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30
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31 @Input private ValueNode object;
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32
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33 public NullCheckNode(ValueNode object) {
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34 super(StampFactory.dependency());
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35 this.object = object;
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36 }
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37
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38 public ValueNode getObject() {
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39 return object;
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40 }
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41
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42 @Override
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43 public void generate(NodeLIRBuilderTool generator) {
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44 generator.emitNullCheck(object, this);
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45 }
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46
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47 @Override
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48 public boolean canDeoptimize() {
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49 return true;
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50 }
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51 }