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annotate graal/com.oracle.graal.loop/src/com/oracle/graal/loop/BasicInductionVariable.java @ 13860:82090a107bae

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make sure pushed values are formatted correctly
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Mon, 03 Feb 2014 17:16:52 -0800
parents 8898d449f95d
children 958c99d0790c
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1 /*
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2 * Copyright (c) 2012, 2012, 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.api.meta.*;
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26 import com.oracle.graal.graph.*;
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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 import com.oracle.graal.nodes.type.*;
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30
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31 public class BasicInductionVariable extends InductionVariable {
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32
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33 private PhiNode phi;
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34 private ValueNode init;
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35 private ValueNode rawStride;
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36 private IntegerArithmeticNode op;
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37
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38 public BasicInductionVariable(LoopEx loop, PhiNode phi, ValueNode init, ValueNode rawStride, IntegerArithmeticNode op) {
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39 super(loop);
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40 this.phi = phi;
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41 this.init = init;
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42 this.rawStride = rawStride;
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43 this.op = op;
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44 }
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45
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46 @Override
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47 public StructuredGraph graph() {
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48 return phi.graph();
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49 }
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50
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51 @Override
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52 public Direction direction() {
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53 Stamp stamp = rawStride.stamp();
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54 if (stamp instanceof IntegerStamp) {
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55 IntegerStamp integerStamp = (IntegerStamp) stamp;
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56 Direction dir = null;
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57 if (integerStamp.isStrictlyPositive()) {
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58 dir = Direction.Up;
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59 } else if (integerStamp.isStrictlyNegative()) {
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60 dir = Direction.Down;
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61 }
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62 if (dir != null) {
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63 if (op instanceof IntegerAddNode) {
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64 return dir;
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65 } else {
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66 assert op instanceof IntegerSubNode;
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67 return dir.opposite();
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68 }
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69 }
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70 }
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71 return null;
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72 }
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73
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74 @Override
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75 public PhiNode valueNode() {
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76 return phi;
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77 }
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78
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79 @Override
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80 public ValueNode initNode() {
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81 return init;
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82 }
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83
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84 @Override
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85 public ValueNode strideNode() {
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86 if (op instanceof IntegerAddNode) {
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87 return rawStride;
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88 }
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89 if (op instanceof IntegerSubNode) {
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90 return graph().unique(new NegateNode(rawStride));
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91 }
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92 throw GraalInternalError.shouldNotReachHere();
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93 }
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94
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95 @Override
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96 public boolean isConstantInit() {
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97 return init.isConstant();
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98 }
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99
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100 @Override
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101 public boolean isConstantStride() {
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102 return rawStride.isConstant();
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103 }
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104
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105 @Override
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106 public long constantInit() {
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107 return init.asConstant().asLong();
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108 }
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109
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110 @Override
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111 public long constantStride() {
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112 if (op instanceof IntegerAddNode) {
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113 return rawStride.asConstant().asLong();
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114 }
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115 if (op instanceof IntegerSubNode) {
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116 return -rawStride.asConstant().asLong();
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117 }
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118 throw GraalInternalError.shouldNotReachHere();
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119 }
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120
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121 @Override
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122 public ValueNode extremumNode(boolean assumePositiveTripCount, Kind kind) {
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123 Kind fromKind = phi.kind();
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124 StructuredGraph graph = graph();
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125 ValueNode stride = strideNode();
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126 ValueNode initNode = this.initNode();
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127 if (fromKind != kind) {
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128 stride = graph.unique(new ConvertNode(fromKind, kind, stride));
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129 initNode = graph.unique(new ConvertNode(fromKind, kind, initNode));
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130 }
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131 ValueNode maxTripCount = loop.counted().maxTripCountNode(assumePositiveTripCount);
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132 if (maxTripCount.kind() != kind) {
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133 maxTripCount = graph.unique(new ConvertNode(maxTripCount.kind(), kind, maxTripCount));
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134 }
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135 return IntegerArithmeticNode.add(graph, IntegerArithmeticNode.mul(graph, stride, IntegerArithmeticNode.sub(graph, maxTripCount, ConstantNode.forIntegerKind(kind, 1, graph))), initNode);
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136 }
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137
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138 @Override
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139 public ValueNode exitValueNode() {
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140 Kind kind = phi.kind();
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141 ValueNode maxTripCount = loop.counted().maxTripCountNode(false);
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142 if (maxTripCount.kind() != kind) {
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143 maxTripCount = graph().unique(new ConvertNode(maxTripCount.kind(), kind, maxTripCount));
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144 }
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145 return IntegerArithmeticNode.add(graph(), IntegerArithmeticNode.mul(graph(), strideNode(), maxTripCount), initNode());
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146 }
acf09b065eba Calculate exit value of counted loop induction variables.
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147
acf09b065eba Calculate exit value of counted loop induction variables.
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148 @Override
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149 public boolean isConstantExtremum() {
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150 return isConstantInit() && isConstantStride() && loop.counted().isConstantMaxTripCount();
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151 }
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152
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153 @Override
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154 public long constantExtremum() {
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155 return constantStride() * (loop.counted().constantMaxTripCount() - 1) + constantInit();
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156 }
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157 }