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

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author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 07 Apr 2014 11:32:04 +0200
parents e302df8bf51c
children e49f62425090
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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.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.graph.*;
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27 import com.oracle.graal.graph.Node.ValueNumberable;
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28 import com.oracle.graal.nodes.calc.*;
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7f713aad89de Allow ProxyNode as a GuardingNode.
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29 import com.oracle.graal.nodes.extended.*;
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30 import com.oracle.graal.nodes.spi.*;
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31 import com.oracle.graal.nodes.type.*;
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32
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33 /**
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34 * A proxy is inserted at loop exits for any value that is created inside the loop (i.e. was not
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35 * live on entry to the loop) and is (potentially) used after the loop.
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36 */
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37 public abstract class ProxyNode extends FloatingNode implements IterableNodeType, ValueNumberable, ValueAndStampProxy {
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38
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39 @Input(InputType.Association) private AbstractBeginNode proxyPoint;
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40
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41 public ProxyNode(Stamp stamp, AbstractBeginNode proxyPoint) {
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42 super(stamp);
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43 assert proxyPoint != null;
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44 this.proxyPoint = proxyPoint;
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45 }
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46
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47 public abstract ValueNode value();
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48
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49 public AbstractBeginNode proxyPoint() {
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50 return proxyPoint;
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51 }
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52
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53 @Override
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54 public boolean verify() {
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55 assert value() != null;
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56 assert proxyPoint != null;
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57 assert !(value() instanceof ProxyNode) || ((ProxyNode) value()).proxyPoint != proxyPoint;
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58 return super.verify();
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59 }
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61 @Override
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62 public ValueNode getOriginalValue() {
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63 return value();
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64 }
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66 public static MemoryProxyNode forMemory(MemoryNode value, AbstractBeginNode exit, LocationIdentity location, StructuredGraph graph) {
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67 return graph.unique(new MemoryProxyNode(ValueNodeUtil.asNode(value), exit, location));
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68 }
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69
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70 public static ValueProxyNode forValue(ValueNode value, AbstractBeginNode exit, StructuredGraph graph) {
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71 return graph.unique(new ValueProxyNode(value, exit));
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72 }
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73
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74 public static GuardProxyNode forGuard(ValueNode value, AbstractBeginNode exit, StructuredGraph graph) {
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75 return graph.unique(new GuardProxyNode(value, exit));
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76 }
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77 }