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annotate graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/match/MatchStatement.java @ 15453:100306ae985b

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switch MatchRule from class to method annotation and fix review feedback
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Wed, 30 Apr 2014 12:27:27 -0700
parents 319deee16746
children bb97b75d1d65
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1 /*
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2 * Copyright (c) 2014, 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.compiler.match;
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24
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25 import static com.oracle.graal.compiler.GraalDebugConfig.*;
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26
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27 import java.lang.reflect.*;
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28 import java.util.*;
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29
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.compiler.*;
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32 import com.oracle.graal.compiler.common.*;
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33 import com.oracle.graal.compiler.gen.*;
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34 import com.oracle.graal.compiler.match.MatchPattern.MatchResultCode;
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35 import com.oracle.graal.compiler.match.MatchPattern.Result;
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36 import com.oracle.graal.debug.*;
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37 import com.oracle.graal.graph.*;
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38 import com.oracle.graal.graph.Node.Verbosity;
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39 import com.oracle.graal.nodes.*;
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40
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41 /**
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42 * A named {@link MatchPattern} along with a {@link MatchGenerator} that can be evaluated to replace
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43 * one or more {@link ValueNode}s with a single {@link Value}.
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44 */
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45
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46 public class MatchStatement {
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47 private static final DebugMetric MatchStatementSuccess = Debug.metric("MatchStatementSuccess");
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48
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49 /**
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50 * A printable name for this statement. Usually it's just the name of the method doing the
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51 * emission.
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52 */
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53 private final String name;
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54
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55 /**
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56 * The actual match pattern.
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57 */
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58 private final MatchPattern pattern;
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59
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60 /**
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61 * The method in the {@link NodeLIRBuilder} subclass that will actually do the code emission.
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62 */
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63 private Method generatorMethod;
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64
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65 /**
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66 * The name of arguments in the order they are expected to be passed to the generator method.
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67 */
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68 private String[] arguments;
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69
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70 public MatchStatement(String name, MatchPattern pattern, Method generator, String[] arguments) {
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71 this.name = name;
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72 this.pattern = pattern;
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73 this.generatorMethod = generator;
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74 this.arguments = arguments;
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75 }
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76
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77 /**
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78 * Attempt to match the current statement against a Node.
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79 *
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80 * @param builder the current builder instance.
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81 * @param node the node to be matched
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82 * @param nodes the nodes in the current block
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83 * @return true if the statement matched something and set a {@link ComplexMatchResult} to be
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84 * evaluated by the NodeLIRBuilder.
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85 */
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86 public boolean generate(NodeLIRBuilder builder, int index, ValueNode node, List<ScheduledNode> nodes) {
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87 assert index == nodes.indexOf(node);
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88 // Check that the basic shape matches
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89 Result result = pattern.matchShape(node, this);
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90 if (result != Result.OK) {
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91 return false;
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92 }
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93 // Now ensure that the other safety constraints are matched.
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94 MatchContext context = new MatchContext(builder, this, index, node, nodes);
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95 result = pattern.matchUsage(node, context);
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96 if (result == Result.OK) {
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97 try {
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98 // Invoke the generator method and set the result if it's non null.
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99 ComplexMatchResult value = (ComplexMatchResult) generatorMethod.invoke(builder, buildArgList(context));
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100 if (value != null) {
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101 context.setResult(value);
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102 MatchStatementSuccess.increment();
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103 return true;
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104 }
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105 } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
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106 throw new GraalInternalError(e);
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107 }
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108 } else {
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109 if (LogVerbose.getValue() && result.code != MatchResultCode.WRONG_CLASS) {
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110 Debug.log("while matching %s|%s %s %s", context.getRoot().toString(Verbosity.Id), context.getRoot().getClass().getSimpleName(), getName(), result);
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111 }
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112 }
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113 return false;
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114 }
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115
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116 /**
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117 * @param context
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118 * @return the ValueNodes captured by the match rule in the order expected by the
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119 * generatorMethod
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120 */
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121 private Object[] buildArgList(MatchContext context) {
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122 Object[] result = new Object[arguments.length];
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123 for (int i = 0; i < arguments.length; i++) {
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124 if ("root".equals(arguments[i])) {
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125 result[i] = context.getRoot();
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126 } else {
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127 result[i] = context.namedNode(arguments[i]);
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128 if (result[i] == null) {
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129 throw new GraalGraphInternalError("Can't find named node %s", arguments[i]);
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130 }
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131 }
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132 }
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133 return result;
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134 }
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135
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136 public String formatMatch(ValueNode root) {
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137 return pattern.formatMatch(root);
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138 }
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139
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140 public MatchPattern getPattern() {
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141 return pattern;
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142 }
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143
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144 public String getName() {
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145 return name;
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146 }
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147 }