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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/CallingConvention.java @ 21610:f555efead2f2
Fix options in makefile
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 29 May 2015 20:43:55 -0700 |
parents | f5b549811bac |
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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.jvmci.code; |
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24 |
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25 import com.oracle.jvmci.meta.Value; |
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26 import com.oracle.jvmci.meta.AllocatableValue; |
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27 import static com.oracle.jvmci.code.ValueUtil.*; |
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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 } |