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annotate graal/GraalCompiler/src/com/sun/c1x/lir/LIRBranch.java @ 2677:0ea5f12e873a

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use com.oracle.max.asm project for assembler
author Christian.Wimmer@Oracle.com
date Fri, 13 May 2011 17:09:20 -0700
parents 16b9a8b5ad39
children c379183d1c54
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2507
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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
2677
0ea5f12e873a use com.oracle.max.asm project for assembler
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25 import com.oracle.max.asm.*;
2507
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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 BlockBegin 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 BlockBegin 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, BlockBegin 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, BlockBegin block, BlockBegin 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 BlockBegin block() {
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106 return block;
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107 }
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108
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109 public BlockBegin 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(BlockBegin 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(BlockBegin 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(BlockBegin oldBlock, BlockBegin 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 }