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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java @ 6409:823a2978e7ba

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Lowering of call targets to direct / indirect call targets
author Christian Wimmer <christian.wimmer@oracle.com>
date Fri, 14 Sep 2012 14:45:47 -0700
parents b4c406861c33
children 2463eb24b644
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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.java;
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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.nodes.*;
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28 import com.oracle.graal.nodes.spi.*;
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29 import com.oracle.graal.nodes.type.*;
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31 public class MethodCallTargetNode extends CallTargetNode implements Node.IterableNodeType, Canonicalizable {
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32 public enum InvokeKind {
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33 Interface,
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34 Special,
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35 Static,
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36 Virtual
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37 }
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38
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39 private final JavaType returnType;
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40 private ResolvedJavaMethod targetMethod;
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41 private InvokeKind invokeKind;
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42
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43 /**
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44 * @param arguments
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45 */
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46 public MethodCallTargetNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, ValueNode[] arguments, JavaType returnType) {
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47 super(arguments);
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48 this.invokeKind = invokeKind;
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49 this.returnType = returnType;
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50 this.targetMethod = targetMethod;
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51 }
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52
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53 /**
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54 * Gets the target method for this invocation instruction.
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55 * @return the target method
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56 */
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57 public ResolvedJavaMethod targetMethod() {
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58 return targetMethod;
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59 }
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60
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61 public InvokeKind invokeKind() {
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62 return invokeKind;
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63 }
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64
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65 public void setInvokeKind(InvokeKind kind) {
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66 this.invokeKind = kind;
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67 }
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68
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69 public void setTargetMethod(ResolvedJavaMethod method) {
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70 targetMethod = method;
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71 }
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72
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73 /**
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74 * Gets the instruction that produces the receiver object for this invocation, if any.
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75 * @return the instruction that produces the receiver object for this invocation if any, {@code null} if this
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76 * invocation does not take a receiver object
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77 */
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78 public ValueNode receiver() {
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79 return isStatic() ? null : arguments().get(0);
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80 }
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81
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82 /**
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83 * Checks whether this is an invocation of a static method.
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84 * @return {@code true} if the invocation is a static invocation
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85 */
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86 public boolean isStatic() {
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87 return invokeKind() == InvokeKind.Static;
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88 }
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89
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90 public Kind returnKind() {
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91 return targetMethod().signature().returnKind();
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92 }
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93
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94 public Invoke invoke() {
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95 return (Invoke) this.usages().first();
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96 }
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97
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98
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99 @Override
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100 public boolean verify() {
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101 assert usages().size() <= 1 : "call target may only be used by a single invoke";
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102 for (Node n : usages()) {
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103 assertTrue(n instanceof Invoke, "call target can only be used from an invoke (%s)", n);
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104 }
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105 return super.verify();
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106 }
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107
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108 @Override
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109 public String toString(Verbosity verbosity) {
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110 if (verbosity == Verbosity.Long) {
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111 return super.toString(Verbosity.Short) + "(" + targetMethod() + ")";
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112 } else {
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113 return super.toString(verbosity);
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114 }
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115 }
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116
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117 @Override
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118 public ValueNode canonical(CanonicalizerTool tool) {
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119 if (!isStatic()) {
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120 ValueNode receiver = receiver();
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121 if (receiver != null && receiver.objectStamp().isExactType()) {
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122 if (invokeKind == InvokeKind.Interface || invokeKind == InvokeKind.Virtual) {
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123 ResolvedJavaMethod method = receiver.objectStamp().type().resolveMethodImpl(targetMethod);
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124 if (method != null) {
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125 invokeKind = InvokeKind.Special;
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126 targetMethod = method;
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127 }
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128 }
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129 }
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130 }
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131 return this;
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132 }
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133
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134 @Override
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135 public Stamp returnStamp() {
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136 Kind returnKind = targetMethod.signature().returnKind();
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137 if (returnKind == Kind.Object && returnType instanceof ResolvedJavaType) {
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138 return StampFactory.declared((ResolvedJavaType) returnType);
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139 } else {
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140 return StampFactory.forKind(returnKind);
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141 }
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142 }
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143
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144 @Override
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145 public String targetName() {
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146 if (targetMethod() == null) {
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147 return "??Invalid!";
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148 }
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149 return targetMethod().name();
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150 }
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151 }