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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java @ 5283:8dd6165d7b73

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compute returnStamp on demand in MethodCallTargetNode
author Lukas Stadler <lukas.stadler@jku.at>
date Tue, 24 Apr 2012 17:11:45 +0200
parents e808627bd16f
children 0ebd9cfdc11f
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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.max.cri.ci.*;
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26 import com.oracle.max.cri.ri.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.nodes.spi.*;
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30 import com.oracle.graal.nodes.type.*;
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32 public class MethodCallTargetNode extends CallTargetNode implements Node.IterableNodeType, Canonicalizable {
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33 public enum InvokeKind {
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34 Interface,
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35 Special,
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36 Static,
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37 Virtual
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38 }
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39
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40 @Data private final RiType returnType;
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41 @Data private RiResolvedMethod targetMethod;
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42 @Data private InvokeKind invokeKind;
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43
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44 /**
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45 * @param arguments
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46 */
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47 public MethodCallTargetNode(InvokeKind invokeKind, RiResolvedMethod targetMethod, ValueNode[] arguments, RiType returnType) {
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48 super(arguments);
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49 this.invokeKind = invokeKind;
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50 this.returnType = returnType;
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51 this.targetMethod = targetMethod;
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52 }
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53
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54 @Override
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55 public RiType returnType() {
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56 return returnType;
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57 }
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58
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59 /**
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60 * Gets the target method for this invocation instruction.
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61 * @return the target method
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62 */
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63 public RiResolvedMethod targetMethod() {
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64 return targetMethod;
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65 }
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66
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67 public InvokeKind invokeKind() {
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68 return invokeKind;
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69 }
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70
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71 public void setInvokeKind(InvokeKind kind) {
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72 this.invokeKind = kind;
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73 }
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74
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75 public void setTargetMethod(RiResolvedMethod method) {
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76 targetMethod = method;
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77 }
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78
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79 /**
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80 * Gets the instruction that produces the receiver object for this invocation, if any.
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81 * @return the instruction that produces the receiver object for this invocation if any, {@code null} if this
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82 * invocation does not take a receiver object
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83 */
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84 public ValueNode receiver() {
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85 return isStatic() ? null : arguments().get(0);
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86 }
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87
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88 /**
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89 * Checks whether this is an invocation of a static method.
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90 * @return {@code true} if the invocation is a static invocation
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91 */
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92 public boolean isStatic() {
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93 return invokeKind() == InvokeKind.Static;
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94 }
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95
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96 @Override
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97 public CiKind returnKind() {
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98 return targetMethod().signature().returnKind(false);
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99 }
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100
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101 public Invoke invoke() {
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102 return (Invoke) this.usages().first();
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103 }
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104
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105
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106 @Override
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107 public boolean verify() {
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108 assert usages().size() <= 1 : "call target may only be used by a single invoke";
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109 for (Node n : usages()) {
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110 assertTrue(n instanceof Invoke, "call target can only be used from an invoke (%s)", n);
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111 }
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112 return super.verify();
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113 }
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114
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115 @Override
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116 public String toString(Verbosity verbosity) {
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117 if (verbosity == Verbosity.Long) {
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118 return super.toString(Verbosity.Short) + "(" + targetMethod() + ")";
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119 } else {
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120 return super.toString(verbosity);
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121 }
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122 }
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123
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124 @Override
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125 public ValueNode canonical(CanonicalizerTool tool) {
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126 if (!isStatic()) {
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127 ValueNode receiver = receiver();
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128 if (receiver != null && receiver.exactType() != null) {
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129 if (invokeKind == InvokeKind.Interface || invokeKind == InvokeKind.Virtual) {
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130 RiResolvedMethod method = receiver.exactType().resolveMethodImpl(targetMethod);
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131 if (method != null) {
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132 invokeKind = InvokeKind.Special;
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133 targetMethod = method;
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134 }
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135 }
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136 }
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137 }
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138 return this;
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139 }
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140
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141 public Stamp returnStamp() {
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142 CiKind returnKind = targetMethod.signature().returnKind(false);
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143 if (returnKind == CiKind.Object && returnType instanceof RiResolvedType) {
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144 return StampFactory.declared((RiResolvedType) returnType);
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145 } else {
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146 return StampFactory.forKind(returnKind);
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147 }
3733
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148 }
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149 }