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annotate graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/CallingConvention.java @ 19510:1cde96b96673

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Fixed code format issues.
author Roland Schatz <roland.schatz@oracle.com>
date Thu, 19 Feb 2015 16:15:56 +0100
parents b04b94b71649
children
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1 /*
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2 * Copyright (c) 2009, 2012, 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.api.code;
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24
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25 import static com.oracle.graal.api.code.ValueUtil.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28
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29 /**
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30 * A calling convention describes the locations in which the arguments for a call are placed and the
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31 * location in which the return value is placed if the call is not void.
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32 */
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33 public class CallingConvention {
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34
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35 /**
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36 * Constants denoting the type of a call for which a calling convention is requested.
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37 */
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38 public enum Type {
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39 /**
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40 * A request for the outgoing argument locations at a call site to Java code.
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41 */
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42 JavaCall(true),
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43
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44 /**
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45 * A request for the incoming argument locations.
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46 */
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47 JavaCallee(false),
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48
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49 /**
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50 * A request for the outgoing argument locations at a call site to external native code that
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51 * complies with the platform ABI.
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52 */
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53 NativeCall(true);
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54
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55 /**
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56 * Determines if this is a request for the outgoing argument locations at a call site.
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57 */
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58 public final boolean out;
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59
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60 public static final Type[] VALUES = values();
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61
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62 private Type(boolean out) {
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63 this.out = out;
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64 }
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65 }
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66
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67 /**
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68 * The amount of stack space (in bytes) required for the stack-based arguments of the call.
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69 */
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70 private final int stackSize;
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71
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72 private final AllocatableValue returnLocation;
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73
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74 /**
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75 * The ordered locations in which the arguments are placed.
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76 */
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77 private final AllocatableValue[] argumentLocations;
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78
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79 /**
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80 * Creates a description of the registers and stack locations used by a call.
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81 *
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82 * @param stackSize amount of stack space (in bytes) required for the stack-based arguments of
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83 * the call
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84 * @param returnLocation the location for the return value or {@link Value#ILLEGAL} if a void
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85 * call
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86 * @param argumentLocations the ordered locations in which the arguments are placed
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87 */
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88 public CallingConvention(int stackSize, AllocatableValue returnLocation, AllocatableValue... argumentLocations) {
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89 assert argumentLocations != null;
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90 assert returnLocation != null;
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91 this.argumentLocations = argumentLocations;
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92 this.stackSize = stackSize;
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93 this.returnLocation = returnLocation;
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94 assert verify();
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95 }
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96
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97 /**
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98 * Gets the location for the return value or {@link Value#ILLEGAL} if a void call.
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99 */
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100 public AllocatableValue getReturn() {
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101 return returnLocation;
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102 }
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103
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104 /**
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105 * Gets the location for the {@code index}'th argument.
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106 */
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107 public AllocatableValue getArgument(int index) {
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108 return argumentLocations[index];
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109 }
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110
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111 /**
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112 * Gets the amount of stack space (in bytes) required for the stack-based arguments of the call.
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113 */
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114 public int getStackSize() {
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115 return stackSize;
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116 }
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117
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118 /**
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119 * Gets the number of locations required for the arguments.
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120 */
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121 public int getArgumentCount() {
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122 return argumentLocations.length;
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123 }
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124
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125 /**
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126 * Gets the locations required for the arguments.
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127 */
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128 public AllocatableValue[] getArguments() {
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129 if (argumentLocations.length == 0) {
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130 return argumentLocations;
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131 }
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132 return argumentLocations.clone();
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133 }
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134
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135 @Override
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136 public String toString() {
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137 StringBuilder sb = new StringBuilder();
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138 sb.append("CallingConvention[");
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139 String sep = "";
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140 for (Value op : argumentLocations) {
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141 sb.append(sep).append(op);
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142 sep = ", ";
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143 }
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144 if (!returnLocation.equals(Value.ILLEGAL)) {
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145 sb.append(" -> ").append(returnLocation);
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146 }
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147 sb.append("]");
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148 return sb.toString();
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149 }
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150
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151 private boolean verify() {
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152 for (int i = 0; i < argumentLocations.length; i++) {
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153 Value location = argumentLocations[i];
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154 assert isStackSlot(location) || isAllocatableValue(location);
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155 }
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156 return true;
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157 }
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158 }