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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Invoke.java @ 2755:80b024e75b29

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small fix for dead blocks
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 20 May 2011 14:50:04 +0200
parents 3ac3dd97d8df
children 9bc0c2eb00d6
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1 /*
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2 * Copyright (c) 2009, 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.sun.c1x.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.c1x.debug.*;
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27 import com.sun.c1x.util.*;
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28 import com.sun.cri.bytecode.*;
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29 import com.sun.cri.ci.*;
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30 import com.sun.cri.ri.*;
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31
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32 /**
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33 * The {@code Invoke} instruction represents all kinds of method calls.
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34 */
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35 public final class Invoke extends StateSplit implements ExceptionEdgeInstruction {
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36
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37 private final int argumentCount;
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38
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39 private static final int SUCCESSOR_COUNT = 1;
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40 private static final int SUCCESSOR_EXCEPTION_EDGE = 0;
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41
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42 @Override
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43 protected int inputCount() {
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44 return super.inputCount() + argumentCount;
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45 }
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46
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47 @Override
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48 protected int successorCount() {
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49 return super.successorCount() + SUCCESSOR_COUNT;
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50 }
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51
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52 /**
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53 * The list of instructions that produce input for this instruction.
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54 */
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55 public Value argument(int index) {
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56 assert index >= 0 && index < argumentCount;
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57 return (Value) inputs().get(super.inputCount() + index);
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58 }
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59
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60 public Value setArgument(int index, Value n) {
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61 assert index >= 0 && index < argumentCount;
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62 return (Value) inputs().set(super.inputCount() + index, n);
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63 }
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64
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65 public int argumentCount() {
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66 return argumentCount;
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67 }
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68
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69 /**
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70 * The entry to the exception dispatch chain for this invoke.
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71 */
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72 @Override
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73 public BlockBegin exceptionEdge() {
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74 return (BlockBegin) successors().get(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE);
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75 }
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76
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77 public Instruction setExceptionEdge(Instruction n) {
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78 return (Instruction) successors().set(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE, n);
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79 }
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80
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81 public final int opcode;
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82 public final RiMethod target;
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83 public final RiType returnType;
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84
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85 /**
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86 * Constructs a new Invoke instruction.
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87 *
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88 * @param opcode the opcode of the invoke
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89 * @param result the result type
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90 * @param args the list of instructions producing arguments to the invocation, including the receiver object
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91 * @param isStatic {@code true} if this call is static (no receiver object)
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92 * @param target the target method being called
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93 * @param stateBefore the state before executing the invocation
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94 */
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95 public Invoke(int opcode, CiKind result, Value[] args, RiMethod target, RiType returnType, Graph graph) {
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96 super(result, args.length, SUCCESSOR_COUNT, graph);
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97 this.opcode = opcode;
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98 this.target = target;
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99 this.returnType = returnType;
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100
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101 this.argumentCount = args.length;
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102 for (int i = 0; i < args.length; i++) {
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103 setArgument(i, args[i]);
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104 }
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105 }
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106
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107 /**
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108 * Gets the opcode of this invoke instruction.
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109 * @return the opcode
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110 */
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111 public int opcode() {
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112 return opcode;
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113 }
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114
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115 /**
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116 * Checks whether this is an invocation of a static method.
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117 * @return {@code true} if the invocation is a static invocation
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118 */
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119 public boolean isStatic() {
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120 return opcode == Bytecodes.INVOKESTATIC;
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121 }
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122
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123 @Override
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124 public RiType declaredType() {
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125 return returnType;
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126 }
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127
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128 /**
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129 * Gets the instruction that produces the receiver object for this invocation, if any.
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130 * @return the instruction that produces the receiver object for this invocation if any, {@code null} if this
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131 * invocation does not take a receiver object
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132 */
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133 public Value receiver() {
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134 assert !isStatic();
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135 return argument(0);
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136 }
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137
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138 /**
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139 * Gets the target method for this invocation instruction.
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140 * @return the target method
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141 */
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142 public RiMethod target() {
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143 return target;
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144 }
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145
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146 /**
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147 * Checks whether this invocation has a receiver object.
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148 * @return {@code true} if this invocation has a receiver object; {@code false} otherwise, if this is a
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149 * static call
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150 */
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151 public boolean hasReceiver() {
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152 return !isStatic();
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153 }
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154
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155 @Override
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156 public void accept(ValueVisitor v) {
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157 v.visitInvoke(this);
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158 }
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159
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160 public CiKind[] signature() {
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161 CiKind receiver = isStatic() ? null : target.holder().kind();
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162 return Util.signatureToKinds(target.signature(), receiver);
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163 }
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164
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165 @Override
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166 public void print(LogStream out) {
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167 int argStart = 0;
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168 if (hasReceiver()) {
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169 out.print(receiver()).print('.');
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170 argStart = 1;
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171 }
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172
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173 RiMethod target = target();
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174 out.print(target.name()).print('(');
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175 for (int i = argStart; i < argumentCount; i++) {
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176 if (i > argStart) {
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177 out.print(", ");
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178 }
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179 out.print(argument(i));
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180 }
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181 out.print(CiUtil.format(") [method: %H.%n(%p):%r]", target, false));
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182 }
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183 }