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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardNode.java @ 5118:e5427faad192

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Merge
author Christian Haeubl <christian.haeubl@oracle.com>
date Mon, 19 Mar 2012 15:51:49 -0700
parents dad1ac9dba7d f29e75070bb6
children 352a95d5031c
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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;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.oracle.graal.nodes.calc.*;
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27 import com.oracle.graal.nodes.spi.*;
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28 import com.oracle.graal.nodes.spi.types.*;
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29 import com.oracle.graal.nodes.type.*;
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30 import com.oracle.max.cri.ri.*;
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32 public final class GuardNode extends FloatingNode implements Canonicalizable, LIRLowerable, TypeFeedbackProvider, Node.IterableNodeType {
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33
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34 @Input private BooleanNode condition;
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35 @Input(notDataflow = true) private FixedNode anchor;
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36 @Data private RiDeoptReason reason;
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37
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38 public FixedNode anchor() {
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39 return anchor;
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40 }
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41
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42 public void setAnchor(FixedNode x) {
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43 updateUsages(anchor, x);
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44 anchor = x;
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45 }
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46
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47 /**
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48 * The instruction that produces the tested boolean value.
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49 */
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50 public BooleanNode condition() {
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51 return condition;
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52 }
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53
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54 public void setCondition(BooleanNode x) {
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55 updateUsages(condition, x);
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56 condition = x;
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57 }
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58
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59 public RiDeoptReason reason() {
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60 return reason;
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61 }
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62
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63 public GuardNode(BooleanNode condition, FixedNode anchor, RiDeoptReason reason) {
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64 super(StampFactory.illegal());
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65 this.condition = condition;
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66 this.anchor = anchor;
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67 this.reason = reason;
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68 }
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69
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70 @Override
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71 public void generate(LIRGeneratorTool gen) {
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72 gen.emitGuardCheck(condition(), reason());
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73 }
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74
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75 @Override
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76 public ValueNode canonical(CanonicalizerTool tool) {
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77 if (condition() instanceof ConstantNode) {
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78 ConstantNode c = (ConstantNode) condition();
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79 if (c.asConstant().asBoolean()) {
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80 if (!dependencies().isEmpty()) {
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81 for (Node usage : usages()) {
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82 if (usage instanceof ValueNode) {
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83 ((ValueNode) usage).dependencies().addAll(dependencies());
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84 }
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85 }
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86 }
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87 this.replaceAtUsages(null);
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88 return null;
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89 }
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90 }
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91 return this;
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92 }
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93
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94 @Override
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95 public void typeFeedback(TypeFeedbackTool tool) {
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96 if (condition instanceof ConditionalTypeFeedbackProvider) {
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97 ((ConditionalTypeFeedbackProvider) condition).typeFeedback(tool);
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98 }
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99 }
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100 }