Mercurial > hg > graal-compiler
annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnsafeLoadNode.java @ 15039:631ca3972292
Allow Unsafe operations on Java to use precise LocationIdentity and improve address formation
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Wed, 09 Apr 2014 10:33:44 -0700 |
parents | 27c04ee36dcb |
children | 882f4cb7cfcf |
rev | line source |
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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.extended; |
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24 |
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25 import static com.oracle.graal.graph.UnsafeAccess.*; |
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26 |
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27 import com.oracle.graal.api.meta.*; |
15001 | 28 import com.oracle.graal.graph.*; |
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29 import com.oracle.graal.nodes.*; |
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30 import com.oracle.graal.nodes.java.*; |
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31 import com.oracle.graal.nodes.spi.*; |
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32 import com.oracle.graal.nodes.type.*; |
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33 |
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34 /** |
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35 * Load of a value from a location specified as an offset relative to an object. No null check is |
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36 * performed before the load. |
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37 */ |
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38 public class UnsafeLoadNode extends UnsafeAccessNode implements Lowerable, Virtualizable { |
15001 | 39 @Input(InputType.Condition) private LogicNode guardingCondition; |
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40 |
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41 public UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity) { |
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42 this(object, offset, accessKind, locationIdentity, null); |
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43 } |
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44 |
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45 public UnsafeLoadNode(ValueNode object, ValueNode offset, Kind accessKind, LocationIdentity locationIdentity, LogicNode condition) { |
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46 super(StampFactory.forKind(accessKind.getStackKind()), object, offset, accessKind, locationIdentity); |
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47 this.guardingCondition = condition; |
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48 } |
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49 |
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50 public LogicNode getGuardingCondition() { |
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51 return guardingCondition; |
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52 } |
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53 |
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54 @Override |
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55 public void lower(LoweringTool tool) { |
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56 tool.getLowerer().lower(this, tool); |
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57 } |
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58 |
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59 @Override |
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60 public void virtualize(VirtualizerTool tool) { |
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61 State state = tool.getObjectState(object()); |
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62 if (state != null && state.getState() == EscapeState.Virtual) { |
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63 ValueNode offsetValue = tool.getReplacedValue(offset()); |
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64 if (offsetValue.isConstant()) { |
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65 long offset = offsetValue.asConstant().asLong(); |
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66 int entryIndex = state.getVirtualObject().entryIndexForOffset(offset); |
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67 if (entryIndex != -1) { |
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68 ValueNode entry = state.getEntry(entryIndex); |
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69 if (entry.getKind() == getKind() || state.getVirtualObject().entryKind(entryIndex) == accessKind()) { |
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70 tool.replaceWith(entry); |
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71 } |
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72 } |
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73 } |
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74 } |
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75 } |
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76 |
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77 @Override |
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78 protected ValueNode cloneAsFieldAccess(ResolvedJavaField field) { |
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79 return this.graph().add(new LoadFieldNode(object(), field)); |
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80 } |
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81 |
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82 @Override |
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83 protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) { |
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84 return this.graph().add(new UnsafeLoadNode(object(), location, accessKind(), identity)); |
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85 } |
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86 |
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87 @SuppressWarnings({"unchecked", "unused"}) |
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88 @NodeIntrinsic |
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89 public static <T> T load(Object object, long offset, @ConstantNodeParameter Kind kind, @ConstantNodeParameter LocationIdentity locationIdentity) { |
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90 if (kind == Kind.Boolean) { |
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91 return (T) (Boolean) unsafe.getBoolean(object, offset); |
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92 } |
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93 if (kind == Kind.Byte) { |
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94 return (T) (Byte) unsafe.getByte(object, offset); |
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95 } |
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96 if (kind == Kind.Short) { |
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97 return (T) (Short) unsafe.getShort(object, offset); |
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98 } |
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99 if (kind == Kind.Char) { |
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100 return (T) (Character) unsafe.getChar(object, offset); |
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101 } |
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102 if (kind == Kind.Int) { |
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103 return (T) (Integer) unsafe.getInt(object, offset); |
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104 } |
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105 if (kind == Kind.Float) { |
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106 return (T) (Float) unsafe.getFloat(object, offset); |
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107 } |
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108 if (kind == Kind.Long) { |
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109 return (T) (Long) unsafe.getLong(object, offset); |
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110 } |
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111 if (kind == Kind.Double) { |
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112 return (T) (Double) unsafe.getDouble(object, offset); |
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113 } |
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114 assert kind == Kind.Object; |
11923
88fb9cba8751
Simplify handling of unsafe store and unsafe load.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
11579
diff
changeset
|
115 return (T) unsafe.getObject(object, offset); |
8481
92571f3eeeeb
made VM independent method substitutions be interpretable
Doug Simon <doug.simon@oracle.com>
parents:
8451
diff
changeset
|
116 } |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
117 } |