Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/ir/IfOp.java @ 2709:7b7dbe19fafb
Remove all unresolved cases from HotspotXirGenerator, use more explicit Deopt, Deopt to lastState instead of stateBefore
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Thu, 19 May 2011 11:36:41 +0200 |
parents | 092e628ddd5d |
children | c3f64b66fc78 |
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.ir; |
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24 |
2586 | 25 import com.oracle.graal.graph.*; |
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26 import com.sun.c1x.debug.*; |
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27 import com.sun.c1x.util.*; |
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28 import com.sun.cri.bytecode.*; |
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29 |
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30 /** |
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31 * The {@code IfOp} class represents a comparison that yields one of two values. |
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32 * Note that these nodes are not built directly from the bytecode but are introduced |
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33 * by conditional expression elimination. |
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34 */ |
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35 public final class IfOp extends Op2 { |
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36 |
2586 | 37 private static final int INPUT_COUNT = 2; |
38 private static final int INPUT_TRUE_VALUE = 0; | |
39 private static final int INPUT_FALSE_VALUE = 1; | |
40 | |
41 private static final int SUCCESSOR_COUNT = 0; | |
42 | |
43 @Override | |
44 protected int inputCount() { | |
45 return super.inputCount() + INPUT_COUNT; | |
46 } | |
47 | |
48 @Override | |
49 protected int successorCount() { | |
50 return super.successorCount() + SUCCESSOR_COUNT; | |
51 } | |
52 | |
53 | |
54 /** | |
55 * The instruction that produces the value if the comparison is true. | |
56 */ | |
57 public Value trueValue() { | |
58 return (Value) inputs().get(super.inputCount() + INPUT_TRUE_VALUE); | |
59 } | |
60 | |
61 public Value setTrueValue(Value n) { | |
62 return (Value) inputs().set(super.inputCount() + INPUT_TRUE_VALUE, n); | |
63 } | |
64 | |
65 /** | |
66 * The instruction that produces the value if the comparison is false. | |
67 */ | |
68 public Value falseValue() { | |
69 return (Value) inputs().get(super.inputCount() + INPUT_FALSE_VALUE); | |
70 } | |
71 | |
72 public Value setFalseValue(Value n) { | |
73 return (Value) inputs().set(super.inputCount() + INPUT_FALSE_VALUE, n); | |
74 } | |
75 | |
76 | |
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77 Condition cond; |
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78 |
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79 /** |
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80 * Constructs a new IfOp. |
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81 * @param x the instruction producing the first value to be compared |
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82 * @param cond the condition of the comparison |
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83 * @param y the instruction producing the second value to be compared |
2586 | 84 * @param trueValue the value produced if the condition is true |
85 * @param falseValue the value produced if the condition is false | |
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86 */ |
2586 | 87 public IfOp(Value x, Condition cond, Value y, Value trueValue, Value falseValue, Graph graph) { |
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88 // TODO: return the appropriate bytecode IF_ICMPEQ, etc |
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89 super(trueValue.kind.meet(falseValue.kind), Bytecodes.ILLEGAL, x, y, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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90 this.cond = cond; |
2586 | 91 setTrueValue(trueValue); |
92 setFalseValue(falseValue); | |
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93 } |
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94 |
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95 /** |
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96 * Gets the condition of this if operation. |
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97 * @return the condition |
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98 */ |
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99 public Condition condition() { |
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100 return cond; |
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101 } |
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102 |
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103 /** |
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104 * Checks whether this comparison operator is commutative (i.e. it is either == or !=). |
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105 * @return {@code true} if this comparison is commutative |
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106 */ |
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107 public boolean isCommutative() { |
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108 return cond == Condition.EQ || cond == Condition.NE; |
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109 } |
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110 |
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111 @Override |
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112 public void accept(ValueVisitor v) { |
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113 v.visitIfOp(this); |
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114 } |
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115 |
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116 @Override |
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117 public int valueNumber() { |
2586 | 118 return Util.hash4(cond.hashCode(), x(), y(), trueValue(), falseValue()); |
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119 } |
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120 |
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121 @Override |
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122 public boolean valueEqual(Instruction i) { |
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123 if (i instanceof IfOp) { |
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124 IfOp o = (IfOp) i; |
2586 | 125 return opcode == o.opcode && x() == o.x() && y() == o.y() && trueValue() == o.trueValue() && falseValue() == o.falseValue(); |
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126 } |
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127 return false; |
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128 } |
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129 |
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130 @Override |
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131 public void print(LogStream out) { |
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132 out.print(x()). |
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133 print(' '). |
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134 print(condition().operator). |
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135 print(' '). |
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136 print(y()). |
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137 print(" ? "). |
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138 print(trueValue()). |
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139 print(" : "). |
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140 print(falseValue()); |
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141 } |
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142 } |