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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/StampTool.java @ 15131:9c1e53adc159

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Remove unsigned flag from IntegerStamp.
author Roland Schatz <roland.schatz@oracle.com>
date Tue, 15 Apr 2014 19:08:29 +0200
parents ea712c41c5a2
children 844cfee4041a
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1 /*
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2 * Copyright (c) 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.nodes.type;
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24
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25 import java.util.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.nodes.calc.*;
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29
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30 /**
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31 * Helper class that is used to keep all stamp-related operations in one place.
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32 */
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33 public class StampTool {
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34
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35 private static Kind joinKind(Kind a, Kind b) {
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36 if (a == b) {
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37 return a;
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38 }
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39 return Kind.Illegal;
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40 }
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41
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42 /**
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43 * Create an {@link IllegalStamp} from two incompatible input stamps, joining the kind of the
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44 * input stamps if possible.
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45 */
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46 private static Stamp joinIllegal(Stamp a, Stamp b) {
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47 IllegalStamp ia = (IllegalStamp) a.illegal();
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48 IllegalStamp ib = (IllegalStamp) b.illegal();
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49 return StampFactory.illegal(joinKind(ia.kind(), ib.kind()));
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50 }
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51
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52 public static Stamp negate(Stamp stamp) {
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53 if (stamp instanceof IntegerStamp) {
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54 IntegerStamp integerStamp = (IntegerStamp) stamp;
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55 int bits = integerStamp.getBits();
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56 if (integerStamp.lowerBound() != IntegerStamp.defaultMinValue(bits)) {
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57 // TODO(ls) check if the mask calculation is correct...
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58 return StampFactory.forInteger(bits, -integerStamp.upperBound(), -integerStamp.lowerBound());
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59 }
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60 } else if (stamp instanceof FloatStamp) {
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61 FloatStamp floatStamp = (FloatStamp) stamp;
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62 return new FloatStamp(floatStamp.getBits(), -floatStamp.upperBound(), -floatStamp.lowerBound(), floatStamp.isNonNaN());
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63 }
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64
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65 return stamp.unrestricted();
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66 }
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67
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68 public static Stamp not(Stamp stamp) {
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69 if (stamp instanceof IntegerStamp) {
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70 IntegerStamp integerStamp = (IntegerStamp) stamp;
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71 int bits = integerStamp.getBits();
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72 long defaultMask = IntegerStamp.defaultMask(bits);
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73 return new IntegerStamp(bits, ~integerStamp.upperBound(), ~integerStamp.lowerBound(), (~integerStamp.upMask()) & defaultMask, (~integerStamp.downMask()) & defaultMask);
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74 }
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75 return stamp.unrestricted();
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76 }
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77
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78 public static Stamp meet(Collection<? extends StampProvider> values) {
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79 Iterator<? extends StampProvider> iterator = values.iterator();
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80 if (iterator.hasNext()) {
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81 Stamp stamp = iterator.next().stamp();
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82 while (iterator.hasNext()) {
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83 stamp = stamp.meet(iterator.next().stamp());
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84 }
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85 return stamp;
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86 } else {
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87 return StampFactory.forVoid();
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88 }
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89 }
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90
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91 public static Stamp add(Stamp stamp1, Stamp stamp2) {
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92 if (stamp1 instanceof IntegerStamp && stamp2 instanceof IntegerStamp) {
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93 return add((IntegerStamp) stamp1, (IntegerStamp) stamp2);
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94 }
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95 return joinIllegal(stamp1, stamp2);
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96 }
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97
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98 private static long carryBits(long x, long y) {
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99 return (x + y) ^ x ^ y;
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100 }
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101
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102 public static Stamp sub(Stamp stamp1, Stamp stamp2) {
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103 return add(stamp1, StampTool.negate(stamp2));
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104 }
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105
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106 public static Stamp div(Stamp stamp1, Stamp stamp2) {
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107 if (stamp1 instanceof IntegerStamp && stamp2 instanceof IntegerStamp) {
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108 return div((IntegerStamp) stamp1, (IntegerStamp) stamp2);
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109 }
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110 return joinIllegal(stamp1, stamp2);
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111 }
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112
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113 public static Stamp div(IntegerStamp stamp1, IntegerStamp stamp2) {
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114 assert stamp1.getBits() == stamp2.getBits();
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115 if (stamp2.isStrictlyPositive()) {
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116 long lowerBound = stamp1.lowerBound() / stamp2.lowerBound();
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117 long upperBound = stamp1.upperBound() / stamp2.lowerBound();
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118 return StampFactory.forInteger(stamp1.getBits(), lowerBound, upperBound);
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119 }
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120 return stamp1.unrestricted();
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121 }
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122
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123 private static boolean addOverflowsPositively(long x, long y, int bits) {
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124 long result = x + y;
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125 if (bits == 64) {
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126 return (~x & ~y & result) < 0;
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diff changeset
127 } else {
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diff changeset
128 return result > IntegerStamp.defaultMaxValue(bits);
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035474349265 Serveral fixes to StampTool.add and some tests
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129 }
035474349265 Serveral fixes to StampTool.add and some tests
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diff changeset
130 }
035474349265 Serveral fixes to StampTool.add and some tests
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diff changeset
131
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132 private static boolean addOverflowsNegatively(long x, long y, int bits) {
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diff changeset
133 long result = x + y;
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diff changeset
134 if (bits == 64) {
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diff changeset
135 return (x & y & ~result) < 0;
035474349265 Serveral fixes to StampTool.add and some tests
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diff changeset
136 } else {
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137 return result < IntegerStamp.defaultMinValue(bits);
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138 }
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139 }
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140
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141 public static IntegerStamp add(IntegerStamp stamp1, IntegerStamp stamp2) {
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142 int bits = stamp1.getBits();
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143 assert bits == stamp2.getBits();
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144
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145 if (stamp1.isUnrestricted()) {
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146 return stamp1;
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147 } else if (stamp2.isUnrestricted()) {
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148 return stamp2;
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149 }
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150 long defaultMask = IntegerStamp.defaultMask(bits);
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diff changeset
151 long variableBits = (stamp1.downMask() ^ stamp1.upMask()) | (stamp2.downMask() ^ stamp2.upMask());
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152 long variableBitsWithCarry = variableBits | (carryBits(stamp1.downMask(), stamp2.downMask()) ^ carryBits(stamp1.upMask(), stamp2.upMask()));
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153 long newDownMask = (stamp1.downMask() + stamp2.downMask()) & ~variableBitsWithCarry;
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154 long newUpMask = (stamp1.downMask() + stamp2.downMask()) | variableBitsWithCarry;
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155
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diff changeset
156 newDownMask &= defaultMask;
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157 newUpMask &= defaultMask;
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158
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159 long lowerBound;
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diff changeset
160 long upperBound;
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diff changeset
161 boolean lowerOverflowsPositively = addOverflowsPositively(stamp1.lowerBound(), stamp2.lowerBound(), bits);
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diff changeset
162 boolean upperOverflowsPositively = addOverflowsPositively(stamp1.upperBound(), stamp2.upperBound(), bits);
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diff changeset
163 boolean lowerOverflowsNegatively = addOverflowsNegatively(stamp1.lowerBound(), stamp2.lowerBound(), bits);
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diff changeset
164 boolean upperOverflowsNegatively = addOverflowsNegatively(stamp1.upperBound(), stamp2.upperBound(), bits);
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diff changeset
165 if ((lowerOverflowsNegatively && !upperOverflowsNegatively) || (!lowerOverflowsPositively && upperOverflowsPositively)) {
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diff changeset
166 lowerBound = IntegerStamp.defaultMinValue(bits);
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diff changeset
167 upperBound = IntegerStamp.defaultMaxValue(bits);
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diff changeset
168 } else {
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diff changeset
169 lowerBound = SignExtendNode.signExtend((stamp1.lowerBound() + stamp2.lowerBound()) & defaultMask, bits);
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diff changeset
170 upperBound = SignExtendNode.signExtend((stamp1.upperBound() + stamp2.upperBound()) & defaultMask, bits);
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diff changeset
171 }
15131
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diff changeset
172 IntegerStamp limit = StampFactory.forInteger(bits, lowerBound, upperBound);
12677
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diff changeset
173 newUpMask &= limit.upMask();
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diff changeset
174 upperBound = SignExtendNode.signExtend(upperBound & newUpMask, bits);
12677
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diff changeset
175 newDownMask |= limit.downMask();
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diff changeset
176 lowerBound |= newDownMask;
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diff changeset
177 return new IntegerStamp(bits, lowerBound, upperBound, newDownMask, newUpMask);
10045
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diff changeset
178 }
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179
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180 public static Stamp sub(IntegerStamp stamp1, IntegerStamp stamp2) {
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diff changeset
181 if (stamp1.isUnrestricted() || stamp2.isUnrestricted()) {
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diff changeset
182 return stamp1.unrestricted();
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183 }
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diff changeset
184 return add(stamp1, (IntegerStamp) StampTool.negate(stamp2));
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diff changeset
185 }
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186
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diff changeset
187 private static Stamp stampForMask(int bits, long downMask, long upMask) {
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188 long lowerBound;
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diff changeset
189 long upperBound;
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diff changeset
190 if (((upMask >>> (bits - 1)) & 1) == 0) {
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diff changeset
191 lowerBound = downMask;
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diff changeset
192 upperBound = upMask;
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diff changeset
193 } else if (((downMask >>> (bits - 1)) & 1) == 1) {
11352
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diff changeset
194 lowerBound = downMask;
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diff changeset
195 upperBound = upMask;
5657
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parents:
diff changeset
196 } else {
13999
f2b300c6e621 Refactor Stamp hierarchy.
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diff changeset
197 lowerBound = downMask | (-1L << (bits - 1));
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
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diff changeset
198 upperBound = IntegerStamp.defaultMaxValue(bits) & upMask;
5657
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parents:
diff changeset
199 }
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
200 lowerBound = IntegerConvertNode.convert(lowerBound, bits, false);
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
201 upperBound = IntegerConvertNode.convert(upperBound, bits, false);
15131
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diff changeset
202 return new IntegerStamp(bits, lowerBound, upperBound, downMask, upMask);
5657
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parents:
diff changeset
203 }
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
204
11265
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parents: 10815
diff changeset
205 public static Stamp and(Stamp stamp1, Stamp stamp2) {
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diff changeset
206 if (stamp1 instanceof IntegerStamp && stamp2 instanceof IntegerStamp) {
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parents: 10815
diff changeset
207 return and((IntegerStamp) stamp1, (IntegerStamp) stamp2);
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diff changeset
208 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
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diff changeset
209 return joinIllegal(stamp1, stamp2);
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
210 }
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
211
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
212 public static Stamp and(IntegerStamp stamp1, IntegerStamp stamp2) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
213 assert stamp1.getBits() == stamp2.getBits();
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
214 return stampForMask(stamp1.getBits(), stamp1.downMask() & stamp2.downMask(), stamp1.upMask() & stamp2.upMask());
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
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parents:
diff changeset
215 }
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
216
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
217 public static Stamp or(Stamp stamp1, Stamp stamp2) {
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parents: 10815
diff changeset
218 if (stamp1 instanceof IntegerStamp && stamp2 instanceof IntegerStamp) {
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
219 return or((IntegerStamp) stamp1, (IntegerStamp) stamp2);
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
220 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
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diff changeset
221 return joinIllegal(stamp1, stamp2);
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
222 }
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
223
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
224 public static Stamp or(IntegerStamp stamp1, IntegerStamp stamp2) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
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parents: 12677
diff changeset
225 assert stamp1.getBits() == stamp2.getBits();
f2b300c6e621 Refactor Stamp hierarchy.
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parents: 12677
diff changeset
226 return stampForMask(stamp1.getBits(), stamp1.downMask() | stamp2.downMask(), stamp1.upMask() | stamp2.upMask());
5657
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parents:
diff changeset
227 }
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
228
11265
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff changeset
229 public static Stamp xor(Stamp stamp1, Stamp stamp2) {
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diff changeset
230 if (stamp1 instanceof IntegerStamp && stamp2 instanceof IntegerStamp) {
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parents: 10815
diff changeset
231 return xor((IntegerStamp) stamp1, (IntegerStamp) stamp2);
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Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
232 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
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diff changeset
233 return joinIllegal(stamp1, stamp2);
11265
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff changeset
234 }
ef6915cf1e59 Add illegal stamp
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diff changeset
235
7489
8461d937ac18 Better for Load/Read stamps for non-stack kinds
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7302
diff changeset
236 public static Stamp xor(IntegerStamp stamp1, IntegerStamp stamp2) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
237 assert stamp1.getBits() == stamp2.getBits();
11352
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Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
238 long variableBits = (stamp1.downMask() ^ stamp1.upMask()) | (stamp2.downMask() ^ stamp2.upMask());
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Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
239 long newDownMask = (stamp1.downMask() ^ stamp2.downMask()) & ~variableBits;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
240 long newUpMask = (stamp1.downMask() ^ stamp2.downMask()) | variableBits;
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
241 return stampForMask(stamp1.getBits(), newDownMask, newUpMask);
7489
8461d937ac18 Better for Load/Read stamps for non-stack kinds
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7302
diff changeset
242 }
8461d937ac18 Better for Load/Read stamps for non-stack kinds
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7302
diff changeset
243
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
244 public static Stamp unsignedRightShift(Stamp value, Stamp shift) {
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Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
245 if (value instanceof IntegerStamp && shift instanceof IntegerStamp) {
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
246 return unsignedRightShift((IntegerStamp) value, (IntegerStamp) shift);
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
247 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
248 return value.illegal();
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
249 }
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
250
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
251 public static Stamp unsignedRightShift(IntegerStamp value, IntegerStamp shift) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
252 int bits = value.getBits();
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
253 if (shift.lowerBound() == shift.upperBound()) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
254 long shiftMask = bits > 32 ? 0x3FL : 0x1FL;
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
255 long shiftCount = shift.lowerBound() & shiftMask;
7302
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
256 if (shiftCount != 0) {
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
257 long lowerBound;
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
258 long upperBound;
12538
ae36dae46d50 Fix StampTool.unsignedRightShift
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 11387
diff changeset
259 long downMask = value.downMask() >>> shiftCount;
12562
035474349265 Serveral fixes to StampTool.add and some tests
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 12538
diff changeset
260 long upMask = value.upMask() >>> shiftCount;
7302
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
261 if (value.lowerBound() < 0) {
12538
ae36dae46d50 Fix StampTool.unsignedRightShift
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 11387
diff changeset
262 lowerBound = downMask;
12562
035474349265 Serveral fixes to StampTool.add and some tests
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 12538
diff changeset
263 upperBound = upMask;
7302
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
264 } else {
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
265 lowerBound = value.lowerBound() >>> shiftCount;
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
266 upperBound = value.upperBound() >>> shiftCount;
f9f40467383e Fixes for new Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6539
diff changeset
267 }
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
268 return new IntegerStamp(bits, lowerBound, upperBound, downMask, upMask);
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
269 }
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
270 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
271 long mask = IntegerStamp.upMaskFor(bits, value.lowerBound(), value.upperBound());
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
272 return stampForMask(bits, 0, mask);
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
273 }
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
274
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
275 public static Stamp leftShift(Stamp value, Stamp shift) {
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
276 if (value instanceof IntegerStamp && shift instanceof IntegerStamp) {
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
277 return leftShift((IntegerStamp) value, (IntegerStamp) shift);
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
278 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
279 return value.illegal();
11265
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
280 }
ef6915cf1e59 Add illegal stamp
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 10815
diff changeset
281
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
282 public static Stamp leftShift(IntegerStamp value, IntegerStamp shift) {
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
283 int bits = value.getBits();
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
284 long defaultMask = IntegerStamp.defaultMask(bits);
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
285 if (value.upMask() == 0) {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
286 return value;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
287 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
288 int shiftBits = bits > 32 ? 6 : 5;
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
289 long shiftMask = bits > 32 ? 0x3FL : 0x1FL;
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
290 if ((shift.lowerBound() >>> shiftBits) == (shift.upperBound() >>> shiftBits)) {
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
291 long downMask = defaultMask;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
292 long upMask = 0;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
293 for (long i = shift.lowerBound(); i <= shift.upperBound(); i++) {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
294 if (shift.contains(i)) {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
295 downMask &= value.downMask() << (i & shiftMask);
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
296 upMask |= value.upMask() << (i & shiftMask);
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
297 }
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
298 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
299 Stamp result = stampForMask(bits, downMask, upMask & defaultMask);
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
300 return result;
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
301 }
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
302 return value.unrestricted();
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
303 }
6313
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
304
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
305 public static Stamp signExtend(Stamp input, int resultBits) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
306 if (input instanceof IntegerStamp) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
307 IntegerStamp inputStamp = (IntegerStamp) input;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
308 int inputBits = inputStamp.getBits();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
309 assert inputBits <= resultBits;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
310
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
311 long defaultMask = IntegerStamp.defaultMask(resultBits);
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
312 long downMask = SignExtendNode.signExtend(inputStamp.downMask(), inputBits) & defaultMask;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
313 long upMask = SignExtendNode.signExtend(inputStamp.upMask(), inputBits) & defaultMask;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
314
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
315 return new IntegerStamp(resultBits, inputStamp.lowerBound(), inputStamp.upperBound(), downMask, upMask);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
316 } else {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
317 return input.illegal();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
318 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
319 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
320
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
321 public static Stamp zeroExtend(Stamp input, int resultBits) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
322 if (input instanceof IntegerStamp) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
323 IntegerStamp inputStamp = (IntegerStamp) input;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
324 int inputBits = inputStamp.getBits();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
325 assert inputBits <= resultBits;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
326
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
327 long downMask = ZeroExtendNode.zeroExtend(inputStamp.downMask(), inputBits);
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
328 long upMask = ZeroExtendNode.zeroExtend(inputStamp.upMask(), inputBits);
14015
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
329
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
330 if (inputStamp.lowerBound() < 0 && inputStamp.upperBound() >= 0) {
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
331 // signed range including 0 and -1
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
332 // after sign extension, the whole range from 0 to MAX_INT is possible
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
333 return stampForMask(resultBits, downMask, upMask);
14010
c7c9624f8ca2 Fix corner case in stamp computation of zero extension.
Roland Schatz <roland.schatz@oracle.com>
parents: 14000
diff changeset
334 }
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
335
14015
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
336 long lowerBound = ZeroExtendNode.zeroExtend(inputStamp.lowerBound(), inputBits);
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
337 long upperBound = ZeroExtendNode.zeroExtend(inputStamp.upperBound(), inputBits);
0354f629431a Bug fixes in StampTool.(zero|sign)Extend.
Roland Schatz <roland.schatz@oracle.com>
parents: 14010
diff changeset
338
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
339 return new IntegerStamp(resultBits, lowerBound, upperBound, downMask, upMask);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
340 } else {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
341 return input.illegal();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
342 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
343 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
344
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
345 public static Stamp narrowingConversion(Stamp input, int resultBits) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
346 if (input instanceof IntegerStamp) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
347 IntegerStamp inputStamp = (IntegerStamp) input;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
348 int inputBits = inputStamp.getBits();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
349 assert resultBits <= inputBits;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
350 if (resultBits == inputBits) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
351 return inputStamp;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
352 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
353
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
354 final long upperBound;
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
355 if (inputStamp.lowerBound() < IntegerStamp.defaultMinValue(resultBits)) {
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
356 upperBound = IntegerStamp.defaultMaxValue(resultBits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
357 } else {
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
358 upperBound = saturate(inputStamp.upperBound(), resultBits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
359 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
360 final long lowerBound;
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
361 if (inputStamp.upperBound() > IntegerStamp.defaultMaxValue(resultBits)) {
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
362 lowerBound = IntegerStamp.defaultMinValue(resultBits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
363 } else {
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
364 lowerBound = saturate(inputStamp.lowerBound(), resultBits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
365 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
366
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
367 long defaultMask = IntegerStamp.defaultMask(resultBits);
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
368 long newDownMask = inputStamp.downMask() & defaultMask;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
369 long newUpMask = inputStamp.upMask() & defaultMask;
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
370 long newLowerBound = SignExtendNode.signExtend((lowerBound | newDownMask) & newUpMask, resultBits);
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
371 long newUpperBound = SignExtendNode.signExtend((upperBound | newDownMask) & newUpMask, resultBits);
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
372 return new IntegerStamp(resultBits, newLowerBound, newUpperBound, newDownMask, newUpMask);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
373 } else {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
374 return input.illegal();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
375 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
376 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
377
12656
9334392ed279 Refactor ConvertNode.
Roland Schatz <roland.schatz@oracle.com>
parents: 12562
diff changeset
378 public static IntegerStamp narrowingKindConversion(IntegerStamp fromStamp, Kind toKind) {
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
379 assert toKind == Kind.Byte || toKind == Kind.Char || toKind == Kind.Short || toKind == Kind.Int;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
380 final long upperBound;
6328
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
381 if (fromStamp.lowerBound() < toKind.getMinValue()) {
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
382 upperBound = toKind.getMaxValue();
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
383 } else {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
384 upperBound = saturate(fromStamp.upperBound(), toKind);
6313
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
385 }
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
386 final long lowerBound;
6328
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
387 if (fromStamp.upperBound() > toKind.getMaxValue()) {
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
388 lowerBound = toKind.getMinValue();
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
389 } else {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
390 lowerBound = saturate(fromStamp.lowerBound(), toKind);
6313
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
391 }
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
392
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
393 long defaultMask = IntegerStamp.defaultMask(toKind.getBitCount());
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
394 long intMask = IntegerStamp.defaultMask(32);
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
395 long newUpMask = signExtend(fromStamp.upMask() & defaultMask, toKind) & intMask;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
396 long newDownMask = signExtend(fromStamp.downMask() & defaultMask, toKind) & intMask;
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
397 return new IntegerStamp(toKind.getStackKind().getBitCount(), (int) ((lowerBound | newDownMask) & newUpMask), (int) ((upperBound | newDownMask) & newUpMask), newDownMask, newUpMask);
13999
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
398 }
f2b300c6e621 Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents: 12677
diff changeset
399
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
400 private static long signExtend(long value, Kind valueKind) {
12562
035474349265 Serveral fixes to StampTool.add and some tests
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 12538
diff changeset
401 if (valueKind != Kind.Char && valueKind != Kind.Long && (value >>> (valueKind.getBitCount() - 1) & 1) == 1) {
11352
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
402 return value | (-1L << valueKind.getBitCount());
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
403 } else {
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
404 return value;
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
405 }
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
406 }
8185c119d731 "always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents: 11265
diff changeset
407
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
408 private static long saturate(long v, int bits) {
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
409 if (bits < 64) {
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
410 long max = IntegerStamp.defaultMaxValue(bits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
411 if (v > max) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
412 return max;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
413 }
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
414 long min = IntegerStamp.defaultMinValue(bits);
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
415 if (v < min) {
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
416 return min;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
417 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
418 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
419 return v;
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
420 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
421
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 13999
diff changeset
422 private static long saturate(long v, Kind kind) {
6328
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
423 long max = kind.getMaxValue();
6313
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
424 if (v > max) {
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
425 return max;
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
426 }
6328
6e66d97a16ae Clean up Kind class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 6313
diff changeset
427 long min = kind.getMinValue();
6313
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
428 if (v < min) {
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
429 return min;
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
430 }
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
431 return v;
7ac010ae8c97 Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 6299
diff changeset
432 }
14863
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
433
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
434 /**
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
435 * Compute the stamp resulting from the unsigned comparison being true.
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
436 *
14863
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
437 * @return null if it's can't be true or it nothing useful can be encoded.
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
438 */
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
439 public static Stamp unsignedCompare(Stamp stamp, Stamp stamp2) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
440 IntegerStamp x = (IntegerStamp) stamp;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
441 IntegerStamp y = (IntegerStamp) stamp2;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
442 if (x == x.unrestricted() && y == y.unrestricted()) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
443 // Don't know anything.
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
444 return null;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
445 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
446 // c <| n, where c is a constant and n is known to be positive.
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
447 if (x.lowerBound() == x.upperBound()) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
448 if (y.isPositive()) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
449 if (x.lowerBound() == (1 << x.getBits()) - 1) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
450 // Constant is MAX_VALUE which must fail.
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
451 return null;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
452 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
453 if (x.lowerBound() <= y.lowerBound()) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
454 // Test will fail. Return illegalStamp instead?
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
455 return null;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
456 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
457 // If the test succeeds then this proves that n is at greater than c so the bounds
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
458 // are [c+1..-n.upperBound)].
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
459 return StampFactory.forInteger(x.getBits(), x.lowerBound() + 1, y.upperBound());
14863
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
460 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
461 return null;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
462 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
463 // n <| c, where c is a strictly positive constant
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
464 if (y.lowerBound() == y.upperBound() && y.isStrictlyPositive()) {
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
465 // The test proves that n is positive and less than c, [0..c-1]
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14863
diff changeset
466 return StampFactory.forInteger(y.getBits(), 0, y.lowerBound() - 1);
14863
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
467 }
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
468 return null;
ea712c41c5a2 merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 14021
diff changeset
469 }
5657
d71eb56d6bb0 new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
470 }