Mercurial > hg > truffle
annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/FrameMap.java @ 18426:b2b37b36a254
Move freeSpillSlot() from FrameMap to ForwardingFrameMapBuilder.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 23 Oct 2014 17:48:46 +0200 |
parents | 9619ba4daf4c |
children | 9bf59aa9d8c6 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2014, 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.lir; |
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24 |
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Dropping Ci* prefixes. Some additional renamings in the api.code interface.
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25 import static com.oracle.graal.api.code.ValueUtil.*; |
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26 |
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Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
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27 import java.util.*; |
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Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
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28 |
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29 import com.oracle.graal.api.code.*; |
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30 import com.oracle.graal.api.meta.*; |
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31 import com.oracle.graal.asm.*; |
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32 |
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33 /** |
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34 * This class is used to build the stack frame layout for a compiled method. A {@link StackSlot} is |
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35 * used to index slots of the frame relative to the stack pointer. The frame size is only fixed |
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36 * after register allocation when all spill slots have been allocated. Both the outgoing argument |
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37 * area and the spill are can grow until then. Therefore, outgoing arguments are indexed from the |
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38 * stack pointer, while spill slots are indexed from the beginning of the frame (and the total frame |
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39 * size has to be added to get the actual offset from the stack pointer). |
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40 */ |
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41 public abstract class FrameMap { |
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42 |
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43 private final TargetDescription target; |
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44 private final RegisterConfig registerConfig; |
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45 |
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46 /** |
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47 * The final frame size, not including the size of the |
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48 * {@link Architecture#getReturnAddressSize() return address slot}. The value is only set after |
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49 * register allocation is complete, i.e., after all spill slots have been allocated. |
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50 */ |
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51 private int frameSize; |
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52 |
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53 /** |
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54 * Initial size of the area occupied by spill slots and other stack-allocated memory blocks. |
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55 */ |
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56 protected int initialSpillSize; |
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57 |
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58 /** |
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59 * Size of the area occupied by spill slots and other stack-allocated memory blocks. |
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60 */ |
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62 |
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63 /** |
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64 * Size of the area occupied by outgoing overflow arguments. This value is adjusted as calling |
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65 * conventions for outgoing calls are retrieved. On some platforms, there is a minimum outgoing |
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66 * size even if no overflow arguments are on the stack. |
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67 */ |
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68 protected int outgoingSize; |
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69 |
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70 /** |
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71 * Determines if this frame has values on the stack for outgoing calls. |
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72 */ |
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73 private boolean hasOutgoingStackArguments; |
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74 |
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75 /** |
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76 * The list of stack slots allocated in this frame that are present in every reference map. |
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77 */ |
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78 private final List<StackSlot> objectStackSlots; |
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79 |
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80 /** |
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81 * Records whether an offset to an incoming stack argument was ever returned by |
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82 * {@link #offsetForStackSlot(StackSlot)}. |
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83 */ |
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84 private boolean accessesCallerFrame; |
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85 |
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86 /** |
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87 * Creates a new frame map for the specified method. The given registerConfig is optional, in |
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88 * case null is passed the default RegisterConfig from the CodeCacheProvider will be used. |
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89 */ |
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90 public FrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig) { |
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91 this.target = codeCache.getTarget(); |
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92 this.registerConfig = registerConfig == null ? codeCache.getRegisterConfig() : registerConfig; |
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93 this.frameSize = -1; |
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94 this.outgoingSize = codeCache.getMinimumOutgoingSize(); |
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95 this.objectStackSlots = new ArrayList<>(); |
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96 } |
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97 |
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98 public RegisterConfig getRegisterConfig() { |
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99 return registerConfig; |
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100 } |
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101 |
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102 public TargetDescription getTarget() { |
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103 return target; |
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104 } |
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105 |
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106 protected int returnAddressSize() { |
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107 return getTarget().arch.getReturnAddressSize(); |
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108 } |
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109 |
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111 CalleeSaveLayout csl = getRegisterConfig().getCalleeSaveLayout(); |
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112 return csl != null ? csl.size : 0; |
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113 } |
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114 |
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115 /** |
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116 * Determines if an offset to an incoming stack argument was ever returned by |
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117 * {@link #offsetForStackSlot(StackSlot)}. |
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118 */ |
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119 public boolean accessesCallerFrame() { |
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120 return accessesCallerFrame; |
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121 } |
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122 |
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123 /** |
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124 * Gets the frame size of the compiled frame, not including the size of the |
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125 * {@link Architecture#getReturnAddressSize() return address slot}. |
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126 * |
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127 * @return The size of the frame (in bytes). |
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128 */ |
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129 public int frameSize() { |
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130 assert frameSize != -1 : "frame size not computed yet"; |
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131 return frameSize; |
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132 } |
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133 |
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134 public int outgoingSize() { |
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135 return outgoingSize; |
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136 } |
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137 |
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138 /** |
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139 * Determines if any space is used in the frame apart from the |
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140 * {@link Architecture#getReturnAddressSize() return address slot}. |
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141 */ |
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142 public boolean frameNeedsAllocating() { |
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143 int unalignedFrameSize = spillSize - returnAddressSize(); |
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144 return hasOutgoingStackArguments || unalignedFrameSize != 0; |
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145 } |
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146 |
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147 /** |
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148 * Gets the total frame size of the compiled frame, including the size of the |
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149 * {@link Architecture#getReturnAddressSize() return address slot}. |
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150 * |
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151 * @return The total size of the frame (in bytes). |
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152 */ |
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153 public abstract int totalFrameSize(); |
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154 |
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155 /** |
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156 * Gets the current size of this frame. This is the size that would be returned by |
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157 * {@link #frameSize()} if {@link #finish()} were called now. |
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158 */ |
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159 public abstract int currentFrameSize(); |
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160 |
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161 /** |
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162 * Aligns the given frame size to the stack alignment size and return the aligned size. |
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163 * |
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164 * @param size the initial frame size to be aligned |
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165 * @return the aligned frame size |
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166 */ |
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167 protected abstract int alignFrameSize(int size); |
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168 |
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169 /** |
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170 * Computes the final size of this frame. After this method has been called, methods that change |
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171 * the frame size cannot be called anymore, e.g., no more spill slots or outgoing arguments can |
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172 * be requested. |
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173 */ |
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174 public void finish() { |
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175 frameSize = currentFrameSize(); |
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176 if (frameSize > getRegisterConfig().getMaximumFrameSize()) { |
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177 throw new BailoutException("Frame size (%d) exceeded maximum allowed frame size (%d).", frameSize, getRegisterConfig().getMaximumFrameSize()); |
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178 } |
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179 } |
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180 |
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181 /** |
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182 * Computes the offset of a stack slot relative to the frame register. |
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183 * |
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184 * @param slot a stack slot |
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185 * @return the offset of the stack slot |
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186 */ |
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187 public int offsetForStackSlot(StackSlot slot) { |
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188 // @formatter:off |
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189 assert (!slot.getRawAddFrameSize() && slot.getRawOffset() < outgoingSize) || |
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190 (slot.getRawAddFrameSize() && slot.getRawOffset() < 0 && -slot.getRawOffset() <= spillSize) || |
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191 (slot.getRawAddFrameSize() && slot.getRawOffset() >= 0) : |
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192 String.format("RawAddFrameSize: %b RawOffset: 0x%x spillSize: 0x%x outgoingSize: 0x%x", slot.getRawAddFrameSize(), slot.getRawOffset(), spillSize, outgoingSize); |
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193 // @formatter:on |
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194 if (slot.isInCallerFrame()) { |
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195 accessesCallerFrame = true; |
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196 } |
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197 return slot.getOffset(totalFrameSize()); |
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198 } |
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199 |
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200 /** |
10956 | 201 * Gets the offset from the stack pointer to the stack area where callee-saved registers are |
202 * stored. | |
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203 * |
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204 * @return The offset to the callee save area (in bytes). |
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205 */ |
10956 | 206 public abstract int offsetToCalleeSaveArea(); |
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207 |
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208 /** |
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209 * Informs the frame map that the compiled code calls a particular method, which may need stack |
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210 * space for outgoing arguments. |
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211 * |
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212 * @param cc The calling convention for the called method. |
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213 */ |
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214 public void callsMethod(CallingConvention cc) { |
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215 reserveOutgoing(cc.getStackSize()); |
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216 } |
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217 |
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218 /** |
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219 * Reserves space for stack-based outgoing arguments. |
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220 * |
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221 * @param argsSize The amount of space (in bytes) to reserve for stack-based outgoing arguments. |
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222 */ |
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223 public void reserveOutgoing(int argsSize) { |
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224 assert frameSize == -1 : "frame size must not yet be fixed"; |
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225 outgoingSize = Math.max(outgoingSize, argsSize); |
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226 hasOutgoingStackArguments = hasOutgoingStackArguments || argsSize > 0; |
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227 } |
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228 |
10956 | 229 /** |
230 * Reserves a new spill slot in the frame of the method being compiled. The returned slot is | |
231 * aligned on its natural alignment, i.e., an 8-byte spill slot is aligned at an 8-byte | |
232 * boundary. | |
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233 * |
10956 | 234 * @param kind The kind of the spill slot to be reserved. |
235 * @param additionalOffset | |
236 * @return A spill slot denoting the reserved memory area. | |
237 */ | |
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238 protected abstract StackSlot allocateNewSpillSlot(LIRKind kind, int additionalOffset); |
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239 |
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240 /** |
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241 * Returns the spill slot size for the given {@link LIRKind}. The default value is the size in |
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242 * bytes for the target architecture. |
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243 * |
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244 * @param kind the {@link LIRKind} to be stored in the spill slot. |
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245 * @return the size in bytes |
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246 */ |
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247 public int spillSlotSize(LIRKind kind) { |
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248 return getTarget().getSizeInBytes(kind.getPlatformKind()); |
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249 } |
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250 |
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251 /** |
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252 * Reserves a spill slot in the frame of the method being compiled. The returned slot is aligned |
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253 * on its natural alignment, i.e., an 8-byte spill slot is aligned at an 8-byte boundary, unless |
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254 * overridden by a subclass. |
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255 * |
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256 * @param kind The kind of the spill slot to be reserved. |
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257 * @return A spill slot denoting the reserved memory area. |
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258 */ |
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259 protected StackSlot allocateSpillSlot(LIRKind kind) { |
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260 assert frameSize == -1 : "frame size must not yet be fixed"; |
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261 int size = spillSlotSize(kind); |
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262 spillSize = NumUtil.roundUp(spillSize + size, size); |
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263 return allocateNewSpillSlot(kind, 0); |
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264 } |
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265 |
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266 /** |
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267 * Reserves a number of contiguous slots in the frame of the method being compiled. If the |
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268 * requested number of slots is 0, this method returns {@code null}. |
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269 * |
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270 * @param slots the number of slots to reserve |
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271 * @param objects specifies the indexes of the object pointer slots. The caller is responsible |
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272 * for guaranteeing that each such object pointer slot is initialized before any |
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273 * instruction that uses a reference map. Without this guarantee, the garbage |
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274 * collector could see garbage object values. |
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275 * @param outObjectStackSlots if non-null, the object pointer slots allocated are added to this |
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276 * list |
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277 * @return the first reserved stack slot (i.e., at the lowest address) |
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278 */ |
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279 public StackSlot allocateStackSlots(int slots, BitSet objects, List<StackSlot> outObjectStackSlots) { |
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280 assert frameSize == -1 : "frame size must not yet be fixed"; |
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281 if (slots == 0) { |
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282 return null; |
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283 } |
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284 spillSize += (slots * getTarget().wordSize); |
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285 |
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286 if (!objects.isEmpty()) { |
13752 | 287 assert objects.length() <= slots; |
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288 StackSlot result = null; |
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289 for (int slotIndex = 0; slotIndex < slots; slotIndex++) { |
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290 StackSlot objectSlot = null; |
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291 if (objects.get(slotIndex)) { |
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292 objectSlot = allocateNewSpillSlot(LIRKind.reference(Kind.Object), slotIndex * getTarget().wordSize); |
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293 objectStackSlots.add(objectSlot); |
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294 if (outObjectStackSlots != null) { |
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295 outObjectStackSlots.add(objectSlot); |
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296 } |
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297 } |
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298 if (slotIndex == 0) { |
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299 if (objectSlot != null) { |
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300 result = objectSlot; |
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301 } else { |
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302 result = allocateNewSpillSlot(LIRKind.value(getTarget().wordKind), 0); |
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303 } |
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304 } |
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305 } |
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306 assert result != null; |
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307 return result; |
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308 |
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309 } else { |
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310 return allocateNewSpillSlot(LIRKind.value(getTarget().wordKind), 0); |
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311 } |
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312 } |
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313 |
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314 public ReferenceMap initReferenceMap(boolean hasRegisters) { |
18139
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Remove FrameMap.stackSlotSize().
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315 ReferenceMap refMap = getTarget().createReferenceMap(hasRegisters, frameSize() / getTarget().wordSize); |
13594
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enhanced support for reserving a block of memory on the stack such that the block can be a mix of primitive data and object pointers
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316 for (StackSlot slot : objectStackSlots) { |
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317 setReference(slot, refMap); |
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318 } |
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319 return refMap; |
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320 } |
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321 |
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322 /** |
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323 * Marks the specified location as a reference in the reference map of the debug information. |
5547
b6617d13ea44
Dropping Ci* prefixes. Some additional renamings in the api.code interface.
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324 * The tracked location can be a {@link RegisterValue} or a {@link StackSlot}. Note that a |
18187
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Rename Constant to JavaConstant.
Roland Schatz <roland.schatz@oracle.com>
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325 * {@link JavaConstant} is automatically tracked. |
14989
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Allow limiting maximum frame size in register configuration and bailout if it exceeds the specified limit.
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326 * |
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327 * @param location The location to be added to the reference map. |
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328 * @param refMap A reference map, as created by {@link #initReferenceMap(boolean)}. |
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329 */ |
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330 public void setReference(Value location, ReferenceMap refMap) { |
16094
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Introduce LIRKind to accurately track oop references in backend.
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331 LIRKind kind = location.getLIRKind(); |
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332 if (isRegister(location)) { |
16093
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Support XMM registers in oop maps.
Roland Schatz <roland.schatz@oracle.com>
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333 refMap.setRegister(asRegister(location).getReferenceMapIndex(), kind); |
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334 } else if (isStackSlot(location)) { |
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335 int offset = offsetForStackSlot(asStackSlot(location)); |
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336 refMap.setStackSlot(offset, kind); |
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337 } else { |
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338 assert isConstant(location); |
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339 } |
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340 } |
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341 } |