Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/lir/LIRBranch.java @ 2789:aeccd2af4e9e
Fixes around critical edge split and placeholder removal after goto removal.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 25 May 2011 16:48:28 +0200 |
parents | c379183d1c54 |
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rev | line source |
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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.lir; |
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24 |
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25 import com.oracle.max.asm.*; |
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26 import com.sun.c1x.ir.*; |
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27 import com.sun.cri.ci.*; |
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28 |
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29 /** |
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30 * @author Marcelo Cintra |
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31 * @author Thomas Wuerthinger |
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32 * |
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33 */ |
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34 public class LIRBranch extends LIRInstruction { |
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35 |
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36 private Condition cond; |
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37 private CiKind kind; |
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38 private Label label; |
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39 |
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40 /** |
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41 * The target block of this branch. |
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42 */ |
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43 private LIRBlock block; |
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44 |
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45 /** |
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46 * This is the unordered block for a float branch. |
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47 */ |
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48 private LIRBlock unorderedBlock; |
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49 |
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50 |
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51 public LIRBranch(Condition cond, Label label) { |
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52 this(cond, label, null); |
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53 } |
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54 |
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55 /** |
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56 * Creates a new LIRBranch instruction. |
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57 * |
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58 * @param cond the branch condition |
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59 * @param label target label |
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60 * |
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61 */ |
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62 public LIRBranch(Condition cond, Label label, LIRDebugInfo info) { |
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63 super(LIROpcode.Branch, CiValue.IllegalValue, info, false); |
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64 this.cond = cond; |
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65 this.label = label; |
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66 } |
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67 |
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68 /** |
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69 * Creates a new LIRBranch instruction. |
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70 * |
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71 * @param cond |
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72 * @param kind |
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73 * @param block |
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74 * |
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75 */ |
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76 public LIRBranch(Condition cond, CiKind kind, LIRBlock block) { |
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77 super(LIROpcode.Branch, CiValue.IllegalValue, null, false); |
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78 this.cond = cond; |
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79 this.kind = kind; |
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80 this.label = block.label(); |
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81 this.block = block; |
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82 this.unorderedBlock = null; |
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83 } |
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84 |
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85 public LIRBranch(Condition cond, CiKind kind, LIRBlock block, LIRBlock ublock) { |
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86 super(LIROpcode.CondFloatBranch, CiValue.IllegalValue, null, false); |
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87 this.cond = cond; |
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88 this.kind = kind; |
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89 this.label = block.label(); |
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90 this.block = block; |
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91 this.unorderedBlock = ublock; |
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92 } |
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93 |
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94 /** |
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95 * @return the condition |
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96 */ |
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97 public Condition cond() { |
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98 return cond; |
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99 } |
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100 |
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101 public Label label() { |
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102 return label; |
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103 } |
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104 |
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105 public LIRBlock block() { |
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106 return block; |
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107 } |
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108 |
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109 public LIRBlock unorderedBlock() { |
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110 return unorderedBlock; |
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111 } |
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112 |
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113 public void changeBlock(LIRBlock b) { |
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114 assert block != null : "must have old block"; |
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115 assert block.label() == label() : "must be equal"; |
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116 |
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117 this.block = b; |
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118 this.label = b.label(); |
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119 } |
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120 |
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121 public void changeUblock(LIRBlock b) { |
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122 assert unorderedBlock != null : "must have old block"; |
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123 this.unorderedBlock = b; |
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124 } |
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125 |
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126 public void negateCondition() { |
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127 cond = cond.negate(); |
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128 } |
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129 |
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130 @Override |
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131 public void emitCode(LIRAssembler masm) { |
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132 masm.emitBranch(this); |
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133 } |
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134 |
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135 @Override |
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136 public String operationString(OperandFormatter operandFmt) { |
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137 StringBuilder buf = new StringBuilder(cond().operator).append(' '); |
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138 if (block() != null) { |
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139 buf.append("[B").append(block.blockID()).append(']'); |
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140 } else if (label().isBound()) { |
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141 buf.append("[label:0x").append(Integer.toHexString(label().position())).append(']'); |
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142 } else { |
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143 buf.append("[label:??]"); |
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144 } |
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145 if (unorderedBlock() != null) { |
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146 buf.append("unordered: [B").append(unorderedBlock().blockID()).append(']'); |
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147 } |
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148 return buf.toString(); |
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149 } |
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150 |
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151 public void substitute(LIRBlock oldBlock, LIRBlock newBlock) { |
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152 if (block == oldBlock) { |
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153 block = newBlock; |
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154 LIRInstruction instr = newBlock.lir().instructionsList().get(0); |
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155 assert instr instanceof LIRLabel : "first instruction of block must be label"; |
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156 label = ((LIRLabel) instr).label(); |
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157 } |
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158 if (unorderedBlock == oldBlock) { |
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159 unorderedBlock = newBlock; |
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160 } |
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161 } |
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162 } |