Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/graph/IR.java @ 2757:152b98832b0e
Merge.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Fri, 20 May 2011 14:52:25 +0200 |
parents | bfcdda4fdd73 |
children | b72e6638b9e6 |
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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.graph; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.oracle.max.graal.schedule.*; |
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28 import com.sun.c1x.*; |
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29 import com.sun.c1x.debug.*; |
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30 import com.sun.c1x.ir.*; |
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31 import com.sun.c1x.lir.*; |
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32 import com.sun.c1x.observer.*; |
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33 import com.sun.c1x.value.*; |
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34 |
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35 /** |
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36 * This class implements the overall container for the HIR (high-level IR) graph |
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37 * and directs its construction, optimization, and finalization. |
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38 * |
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39 * @author Thomas Wuerthinger |
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40 * @author Ben L. Titzer |
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41 */ |
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42 public class IR { |
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43 |
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44 /** |
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45 * The compilation associated with this IR. |
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46 */ |
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47 public final C1XCompilation compilation; |
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48 |
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49 /** |
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50 * The start block of this IR. |
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51 */ |
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52 public LIRBlock startBlock; |
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53 |
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54 private int maxLocks; |
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55 |
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56 /** |
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57 * The linear-scan ordered list of blocks. |
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58 */ |
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59 private List<LIRBlock> orderedBlocks; |
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60 |
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61 /** |
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62 * Creates a new IR instance for the specified compilation. |
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63 * @param compilation the compilation |
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64 */ |
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65 public IR(C1XCompilation compilation) { |
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66 this.compilation = compilation; |
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67 } |
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68 |
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69 /** |
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70 * Builds the graph, optimizes it, and computes the linear scan block order. |
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71 */ |
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72 public void build() { |
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73 if (C1XOptions.PrintTimers) { |
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74 C1XTimers.HIR_CREATE.start(); |
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75 } |
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76 |
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77 buildGraph(); |
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78 |
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79 if (C1XOptions.PrintTimers) { |
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80 C1XTimers.HIR_CREATE.stop(); |
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81 C1XTimers.HIR_OPTIMIZE.start(); |
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82 } |
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83 |
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84 Schedule schedule = new Schedule(this.compilation.graph); |
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85 |
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86 computeLinearScanOrder(); |
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87 |
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88 if (C1XOptions.PrintTimers) { |
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89 C1XTimers.HIR_OPTIMIZE.stop(); |
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90 } |
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91 } |
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92 |
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93 private void buildGraph() { |
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94 // Graph builder must set the startBlock and the osrEntryBlock |
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95 new GraphBuilder(compilation, this, compilation.graph).build(); |
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96 verifyAndPrint("After graph building"); |
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97 |
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98 if (C1XOptions.PrintCompilation) { |
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99 TTY.print(String.format("%3d blocks | ", this.numberOfBlocks())); |
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100 } |
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101 } |
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102 |
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103 private void computeLinearScanOrder() { |
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104 if (C1XOptions.GenLIR) { |
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105 makeLinearScanOrder(); |
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106 verifyAndPrint("After linear scan order"); |
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107 } |
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108 } |
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109 |
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110 private void makeLinearScanOrder() { |
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111 if (orderedBlocks == null) { |
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112 CriticalEdgeFinder finder = new CriticalEdgeFinder(this); |
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113 getHIRStartBlock().iteratePreOrder(finder); |
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114 finder.splitCriticalEdges(); |
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115 ComputeLinearScanOrder computeLinearScanOrder = new ComputeLinearScanOrder(compilation.stats.blockCount, getHIRStartBlock()); |
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116 List<BlockBegin> blocks = computeLinearScanOrder.linearScanOrder(); |
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117 orderedBlocks = new ArrayList<LIRBlock>(); |
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118 |
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119 int z = 0; |
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120 for (BlockBegin bb : blocks) { |
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121 LIRBlock lirBlock = new LIRBlock(z); |
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122 bb.setLIRBlock(lirBlock); |
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123 lirBlock.setLinearScanNumber(bb.linearScanNumber()); |
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124 // TODO(tw): Initialize LIRBlock.linearScanLoopHeader and LIRBlock.linearScanLoopEnd |
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125 lirBlock.setStateBefore(bb.stateBefore()); |
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126 orderedBlocks.add(lirBlock); |
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127 ++z; |
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128 } |
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129 |
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130 for (BlockBegin bb : blocks) { |
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131 LIRBlock lirBlock = bb.lirBlock(); |
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132 for (int i = 0; i < bb.numberOfPreds(); ++i) { |
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133 lirBlock.blockPredecessors().add(bb.predAt(i).block().lirBlock()); |
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134 } |
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135 |
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136 for (int i = 0; i < bb.numberOfSux(); ++i) { |
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137 lirBlock.blockSuccessors().add(bb.suxAt(i).lirBlock()); |
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138 } |
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139 |
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140 Instruction first = bb; |
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141 while (first != null) { |
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142 lirBlock.getInstructions().add(first); |
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143 first = first.next(); |
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144 } |
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145 } |
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146 |
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147 startBlock = getHIRStartBlock().lirBlock(); |
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148 assert startBlock != null; |
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149 compilation.stats.loopCount = computeLinearScanOrder.numLoops(); |
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150 } |
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151 } |
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152 |
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153 /** |
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154 * Gets the linear scan ordering of blocks as a list. |
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155 * @return the blocks in linear scan order |
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156 */ |
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157 public List<LIRBlock> linearScanOrder() { |
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158 return orderedBlocks; |
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159 } |
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160 |
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161 private void print(boolean cfgOnly) { |
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162 if (!TTY.isSuppressed()) { |
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163 TTY.println("IR for " + compilation.method); |
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164 final InstructionPrinter ip = new InstructionPrinter(TTY.out()); |
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165 final BlockPrinter bp = new BlockPrinter(this, ip, cfgOnly); |
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166 getHIRStartBlock().iteratePreOrder(bp); |
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167 } |
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168 } |
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169 |
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170 /** |
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171 * Verifies the IR and prints it out if the relevant options are set. |
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172 * @param phase the name of the phase for printing |
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173 */ |
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174 public void verifyAndPrint(String phase) { |
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175 if (C1XOptions.PrintHIR && !TTY.isSuppressed()) { |
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176 TTY.println(phase); |
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177 print(false); |
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178 } |
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179 |
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180 if (compilation.compiler.isObserved()) { |
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181 compilation.compiler.fireCompilationEvent(new CompilationEvent(compilation, phase, getHIRStartBlock(), true, false)); |
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182 } |
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183 } |
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184 |
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185 /** |
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186 * Creates and inserts a new block between this block and the specified successor, |
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187 * altering the successor and predecessor lists of involved blocks appropriately. |
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188 * @param source the source of the edge |
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189 * @param target the successor before which to insert a block |
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190 * @return the new block inserted |
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191 */ |
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192 public BlockBegin splitEdge(BlockBegin source, BlockBegin target) { |
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193 int bci = -2; |
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194 |
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195 int backEdgeIndex = target.predecessors().indexOf(source.end()); |
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196 |
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197 // create new successor and mark it for special block order treatment |
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198 BlockBegin newSucc = new BlockBegin(bci, nextBlockNumber(), compilation.graph); |
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199 |
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200 // This goto is not a safepoint. |
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201 Goto e = new Goto(target, null, compilation.graph); |
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202 newSucc.appendNext(e); |
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203 e.reorderSuccessor(0, backEdgeIndex); |
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204 // setup states |
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205 FrameState s = source.end().stateAfter(); |
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206 newSucc.setStateBefore(s); |
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207 e.setStateAfter(s); |
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208 assert newSucc.stateBefore().localsSize() == s.localsSize(); |
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209 assert newSucc.stateBefore().stackSize() == s.stackSize(); |
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210 assert newSucc.stateBefore().locksSize() == s.locksSize(); |
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211 // link predecessor to new block |
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212 source.end().substituteSuccessor(target, newSucc); |
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213 |
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214 return newSucc; |
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215 } |
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216 |
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217 public void replaceBlock(BlockBegin oldBlock, BlockBegin newBlock) { |
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218 List<Instruction> predecessors = new ArrayList<Instruction>(oldBlock.blockPredecessors()); |
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219 for (Instruction pred : predecessors) { |
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220 // substitute the new successor for this block in each predecessor |
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221 pred.block().end().substituteSuccessor(oldBlock, newBlock); |
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222 } |
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223 oldBlock.end().clearSuccessors(); |
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224 } |
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225 |
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226 public int nextBlockNumber() { |
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227 return compilation.stats.blockCount++; |
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228 } |
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229 |
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230 public int numberOfBlocks() { |
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231 return compilation.stats.blockCount; |
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232 } |
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233 |
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234 public int numLoops() { |
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235 return compilation.stats.loopCount; |
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236 } |
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237 |
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238 /** |
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239 * Updates the maximum number of locks held at any one time. |
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240 * |
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241 * @param locks a lock count that will replace the current {@linkplain #maxLocks() max locks} if it is greater |
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242 */ |
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243 public void updateMaxLocks(int locks) { |
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244 if (locks > maxLocks) { |
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245 maxLocks = locks; |
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246 } |
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247 } |
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248 |
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249 /** |
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250 * Gets the number of locks. |
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251 * @return the number of locks |
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252 */ |
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253 public final int maxLocks() { |
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254 return maxLocks; |
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255 } |
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256 |
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257 public BlockBegin getHIRStartBlock() { |
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258 return (BlockBegin) compilation.graph.start().successors().get(0); |
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259 } |
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260 } |