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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnsafeLoadNode.java @ 19403:61d3cb8e1280

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Add generic parameter to NodeClass. Change Graph#getNodes(Class) to Graph#getNodes(NodeClass).
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 16 Feb 2015 17:47:43 +0100
parents 7e2c87dae93e
children 8fc336a04d77
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1 /*
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2 * Copyright (c) 2011, 2015, 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 static com.oracle.graal.compiler.common.UnsafeAccess.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.compiler.common.type.*;
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29 import com.oracle.graal.graph.*;
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30 import com.oracle.graal.nodeinfo.*;
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31 import com.oracle.graal.nodes.*;
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32 import com.oracle.graal.nodes.java.*;
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33 import com.oracle.graal.nodes.spi.*;
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34
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35 /**
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36 * Load of a value from a location specified as an offset relative to an object. No null check is
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37 * performed before the load.
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38 */
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39 @NodeInfo
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40 public final class UnsafeLoadNode extends UnsafeAccessNode implements Lowerable, Virtualizable {
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41 public static final NodeClass<UnsafeLoadNode> TYPE = NodeClass.get(UnsafeLoadNode.class);
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42 @OptionalInput(InputType.Condition) LogicNode guardingCondition;
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43
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44 public UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity) {
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45 this(object, offset, accessKind, locationIdentity, null);
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46 }
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47
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48 public UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity, LogicNode condition) {
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49 super(TYPE, StampFactory.forKind(accessKind.getStackKind()), object, offset, accessKind, locationIdentity);
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50 this.guardingCondition = condition;
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51 }
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52
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53 public LogicNode getGuardingCondition() {
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54 return guardingCondition;
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55 }
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57 @Override
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58 public void lower(LoweringTool tool) {
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59 tool.getLowerer().lower(this, tool);
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60 }
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61
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62 @Override
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63 public void virtualize(VirtualizerTool tool) {
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64 State state = tool.getObjectState(object());
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65 if (state != null && state.getState() == EscapeState.Virtual) {
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66 ValueNode offsetValue = tool.getReplacedValue(offset());
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67 if (offsetValue.isConstant()) {
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68 long off = offsetValue.asJavaConstant().asLong();
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69 int entryIndex = state.getVirtualObject().entryIndexForOffset(off, accessKind());
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70
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71 if (entryIndex != -1) {
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72 ValueNode entry = state.getEntry(entryIndex);
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73 Kind entryKind = state.getVirtualObject().entryKind(entryIndex);
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74 if (entry.getKind() == getKind() || entryKind == accessKind()) {
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75 tool.replaceWith(entry);
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76 }
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77 }
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78 }
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79 }
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80 }
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81
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82 @Override
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83 protected ValueNode cloneAsFieldAccess(ResolvedJavaField field) {
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84 return new LoadFieldNode(object(), field);
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85 }
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86
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87 @Override
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88 protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) {
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89 return new UnsafeLoadNode(object(), location, accessKind(), identity, guardingCondition);
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90 }
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91
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92 @SuppressWarnings({"unchecked", "unused"})
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93 @NodeIntrinsic
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94 public static <T> T load(Object object, long offset, @ConstantNodeParameter Kind kind, @ConstantNodeParameter LocationIdentity locationIdentity) {
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95 if (kind == Kind.Boolean) {
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96 return (T) (Boolean) unsafe.getBoolean(object, offset);
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97 }
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98 if (kind == Kind.Byte) {
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99 return (T) (Byte) unsafe.getByte(object, offset);
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100 }
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101 if (kind == Kind.Short) {
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102 return (T) (Short) unsafe.getShort(object, offset);
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103 }
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104 if (kind == Kind.Char) {
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105 return (T) (Character) unsafe.getChar(object, offset);
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106 }
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107 if (kind == Kind.Int) {
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108 return (T) (Integer) unsafe.getInt(object, offset);
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109 }
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110 if (kind == Kind.Float) {
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111 return (T) (Float) unsafe.getFloat(object, offset);
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112 }
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113 if (kind == Kind.Long) {
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114 return (T) (Long) unsafe.getLong(object, offset);
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115 }
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116 if (kind == Kind.Double) {
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117 return (T) (Double) unsafe.getDouble(object, offset);
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118 }
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119 assert kind == Kind.Object;
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120 return (T) unsafe.getObject(object, offset);
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121 }
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122 }