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annotate graal/com.oracle.graal.loop/src/com/oracle/graal/loop/BasicInductionVariable.java @ 19190:18c2fd3d7fc7

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Cleanup InductionVariable declarations a bit
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Mon, 09 Feb 2015 15:52:17 -0800
parents fe3a00661c32
children ef52cebd4030
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1 /*
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2 * Copyright (c) 2012, 2015, 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.loop;
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24
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25 import com.oracle.graal.compiler.common.*;
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26 import com.oracle.graal.compiler.common.type.*;
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27 import com.oracle.graal.nodes.*;
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28 import com.oracle.graal.nodes.calc.*;
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29
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30 public class BasicInductionVariable extends InductionVariable {
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31
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32 private final ValuePhiNode phi;
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33 private final ValueNode init;
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34 private final ValueNode rawStride;
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35 private final BinaryArithmeticNode<?> op;
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36
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37 public BasicInductionVariable(LoopEx loop, ValuePhiNode phi, ValueNode init, ValueNode rawStride, BinaryArithmeticNode<?> op) {
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38 super(loop);
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39 this.phi = phi;
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40 this.init = init;
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41 this.rawStride = rawStride;
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42 this.op = op;
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43 }
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44
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45 @Override
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46 public StructuredGraph graph() {
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47 return phi.graph();
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48 }
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49
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50 public BinaryArithmeticNode<?> getOp() {
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51 return op;
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52 }
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53
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54 @Override
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55 public Direction direction() {
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56 Stamp stamp = rawStride.stamp();
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57 if (stamp instanceof IntegerStamp) {
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58 IntegerStamp integerStamp = (IntegerStamp) stamp;
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59 Direction dir = null;
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60 if (integerStamp.isStrictlyPositive()) {
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61 dir = Direction.Up;
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62 } else if (integerStamp.isStrictlyNegative()) {
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63 dir = Direction.Down;
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64 }
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65 if (dir != null) {
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66 if (op instanceof AddNode) {
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67 return dir;
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68 } else {
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69 assert op instanceof SubNode;
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70 return dir.opposite();
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71 }
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72 }
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73 }
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74 return null;
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75 }
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76
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77 @Override
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78 public ValuePhiNode valueNode() {
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79 return phi;
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80 }
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81
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82 @Override
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83 public ValueNode initNode() {
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84 return init;
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85 }
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86
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87 @Override
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88 public ValueNode strideNode() {
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89 if (op instanceof AddNode) {
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90 return rawStride;
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91 }
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92 if (op instanceof SubNode) {
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93 return graph().unique(new NegateNode(rawStride));
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94 }
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95 throw GraalInternalError.shouldNotReachHere();
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96 }
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97
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98 @Override
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99 public boolean isConstantInit() {
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100 return init.isConstant();
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101 }
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102
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103 @Override
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104 public boolean isConstantStride() {
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105 return rawStride.isConstant();
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106 }
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107
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108 @Override
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109 public long constantInit() {
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110 return init.asJavaConstant().asLong();
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111 }
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112
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113 @Override
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114 public long constantStride() {
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115 if (op instanceof AddNode) {
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116 return rawStride.asJavaConstant().asLong();
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117 }
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118 if (op instanceof SubNode) {
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119 return -rawStride.asJavaConstant().asLong();
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120 }
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121 throw GraalInternalError.shouldNotReachHere();
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122 }
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123
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124 @Override
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125 public ValueNode extremumNode(boolean assumePositiveTripCount, Stamp stamp) {
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126 Stamp fromStamp = phi.stamp();
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127 StructuredGraph graph = graph();
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128 ValueNode stride = strideNode();
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129 ValueNode initNode = this.initNode();
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130 if (!fromStamp.isCompatible(stamp)) {
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131 stride = IntegerConvertNode.convert(stride, stamp, graph());
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132 initNode = IntegerConvertNode.convert(initNode, stamp, graph());
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133 }
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134 ValueNode maxTripCount = loop.counted().maxTripCountNode(assumePositiveTripCount);
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135 if (!maxTripCount.stamp().isCompatible(stamp)) {
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136 maxTripCount = IntegerConvertNode.convert(maxTripCount, stamp, graph());
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137 }
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138 return BinaryArithmeticNode.add(graph, BinaryArithmeticNode.mul(graph, stride, BinaryArithmeticNode.sub(graph, maxTripCount, ConstantNode.forIntegerStamp(stamp, 1, graph))), initNode);
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139 }
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140
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141 @Override
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142 public ValueNode exitValueNode() {
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Roland Schatz <roland.schatz@oracle.com>
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143 Stamp stamp = phi.stamp();
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144 ValueNode maxTripCount = loop.counted().maxTripCountNode(false);
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145 if (!maxTripCount.stamp().isCompatible(stamp)) {
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c5b2a3c22318 refactor more Canonicalizable implementations to not add new nodes to the graph
Lukas Stadler <lukas.stadler@oracle.com>
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146 maxTripCount = IntegerConvertNode.convert(maxTripCount, stamp, graph());
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147 }
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ec35bb4eccb8 Add support for other data types to integer arithmetic nodes.
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148 return BinaryArithmeticNode.add(graph(), BinaryArithmeticNode.mul(graph(), strideNode(), maxTripCount), initNode());
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149 }
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Roland Schatz <roland.schatz@oracle.com>
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150
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
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151 @Override
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Gilles Duboscq <duboscq@ssw.jku.at>
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152 public boolean isConstantExtremum() {
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153 return isConstantInit() && isConstantStride() && loop.counted().isConstantMaxTripCount();
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154 }
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155
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156 @Override
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157 public long constantExtremum() {
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Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
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158 return constantStride() * (loop.counted().constantMaxTripCount() - 1) + constantInit();
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159 }
16341
627f255ee298 made InductionVariable.deleteUnusedNodes() abstract
Doug Simon <doug.simon@oracle.com>
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160
627f255ee298 made InductionVariable.deleteUnusedNodes() abstract
Doug Simon <doug.simon@oracle.com>
parents: 16248
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161 @Override
627f255ee298 made InductionVariable.deleteUnusedNodes() abstract
Doug Simon <doug.simon@oracle.com>
parents: 16248
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162 public void deleteUnusedNodes() {
627f255ee298 made InductionVariable.deleteUnusedNodes() abstract
Doug Simon <doug.simon@oracle.com>
parents: 16248
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163 }
18953
fe3a00661c32 Add toString and some accessors to InductionVariable subclasses
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 18845
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164
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Tom Rodriguez <tom.rodriguez@oracle.com>
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165 @Override
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166 public String toString() {
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167 return String.format("BasicInductionVariable %s %s %s %s", initNode(), phi, op.getNodeClass().shortName(), strideNode());
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parents: 18845
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168 }
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Gilles Duboscq <duboscq@ssw.jku.at>
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169 }