Mercurial > hg > graal-jvmci-8
annotate graal/Compiler/src/com/sun/c1x/ir/Intrinsic.java @ 2507:9ec15d6914ca
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author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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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.sun.c1x.*; |
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26 import com.sun.c1x.debug.*; |
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27 import com.sun.c1x.value.*; |
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28 import com.sun.cri.ci.*; |
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29 import com.sun.cri.ri.*; |
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30 |
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31 /** |
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32 * The {@code Intrinsic} instruction represents a call to a JDK method |
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33 * that has been made {@linkplain C1XIntrinsic intrinsic}. |
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34 * |
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35 * @author Ben L. Titzer |
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36 * @see C1XIntrinsic |
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37 */ |
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38 public final class Intrinsic extends StateSplit { |
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39 |
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40 final C1XIntrinsic intrinsic; |
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41 final RiMethod target; |
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42 final Value[] arguments; |
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43 final boolean canTrap; |
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44 |
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45 /** |
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46 * Creates a new Intrinsic instruction. |
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47 * @param kind the result type of the instruction |
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48 * @param intrinsic the actual intrinsic |
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49 * @param target the method for this intrinsic |
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50 * @param args the arguments to the call (including the receiver object) |
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51 * @param isStatic {@code true} if this method is static |
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52 * @param stateBefore the lock stack |
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53 * @param preservesState {@code true} if the implementation of this intrinsic preserves register state |
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54 * @param canTrap {@code true} if this intrinsic can cause a trap |
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55 */ |
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56 public Intrinsic(CiKind kind, C1XIntrinsic intrinsic, RiMethod target, Value[] args, boolean isStatic, |
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57 FrameState stateBefore, boolean preservesState, boolean canTrap) { |
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58 super(kind, stateBefore); |
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59 this.intrinsic = intrinsic; |
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60 int nonNullArgs = 0; |
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61 for (int i = 0; i < args.length; ++i) { |
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62 if (args[i] != null) { |
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63 nonNullArgs++; |
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64 } |
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65 } |
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66 this.arguments = new Value[nonNullArgs]; |
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67 int z = 0; |
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68 for (int i = 0; i < args.length; ++i) { |
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69 if (args[i] != null) { |
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70 arguments[z++] = args[i]; |
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71 } |
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72 } |
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73 this.target = target; |
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74 initFlag(Flag.IsStatic, isStatic); |
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75 // Preserves state means that the intrinsic preserves register state across all cases, |
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76 // including slow cases--even if it causes a trap. If so, it can still be a candidate |
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77 // for load elimination and common subexpression elimination |
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78 initFlag(Flag.PreservesState, preservesState); |
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79 this.canTrap = canTrap; |
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80 if (!isStatic && args[0].isNonNull()) { |
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81 eliminateNullCheck(); |
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82 } |
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83 } |
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84 |
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85 /** |
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86 * Gets the intrinsic represented by this instruction. |
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87 * @return the intrinsic |
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88 */ |
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89 public C1XIntrinsic intrinsic() { |
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90 return intrinsic; |
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91 } |
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92 |
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93 /** |
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94 * Gets the target method for this invocation instruction. |
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95 * @return the target method |
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96 */ |
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97 public RiMethod target() { |
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98 return target; |
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99 } |
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100 |
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101 /** |
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102 * Gets the list of instructions that produce input for this instruction. |
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103 * @return the list of instructions that produce input |
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104 */ |
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105 public Value[] arguments() { |
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106 return arguments; |
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107 } |
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108 |
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109 public boolean isStatic() { |
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110 return checkFlag(Flag.IsStatic); |
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111 } |
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112 |
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113 /** |
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114 * Checks whether this intrinsic has a receiver object. |
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115 * @return {@code true} if this intrinsic has a receiver object |
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116 */ |
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117 public boolean hasReceiver() { |
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118 return !isStatic(); |
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119 } |
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120 |
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121 /** |
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122 * Gets the instruction which produces the receiver object for this intrinsic. |
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123 * @return the instruction producing the receiver object |
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124 */ |
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125 public Value receiver() { |
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126 assert !isStatic(); |
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127 return arguments[0]; |
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128 } |
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129 |
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130 /** |
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131 * Checks whether this intrinsic preserves the state of registers across all cases. |
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132 * @return {@code true} if this intrinsic always preserves register state |
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133 */ |
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134 public boolean preservesState() { |
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135 return checkFlag(Flag.PreservesState); |
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136 } |
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137 |
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138 /** |
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139 * Checks whether this intrinsic can cause a trap. |
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140 * @return {@code true} if this intrinsic can cause a trap |
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141 */ |
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142 @Override |
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143 public boolean canTrap() { |
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144 return canTrap; |
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145 } |
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146 |
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147 @Override |
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148 public void inputValuesDo(ValueClosure closure) { |
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149 for (int i = 0; i < arguments.length; i++) { |
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150 arguments[i] = closure.apply(arguments[i]); |
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151 } |
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152 } |
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153 |
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154 @Override |
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155 public void accept(ValueVisitor v) { |
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156 v.visitIntrinsic(this); |
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157 } |
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158 |
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159 public Value argumentAt(int i) { |
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160 return arguments[i]; |
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161 } |
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162 |
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163 public int numberOfArguments() { |
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164 return arguments.length; |
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165 } |
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166 |
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167 @Override |
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168 public void print(LogStream out) { |
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169 out.print(intrinsic().className).print('.').print(intrinsic().name()).print('('); |
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170 for (int i = 0; i < arguments().length; i++) { |
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171 if (i > 0) { |
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172 out.print(", "); |
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173 } |
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174 out.print(arguments()[i]); |
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175 } |
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176 out.print(')'); |
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177 } |
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178 } |