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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerConvertNode.java @ 18720:ab9d3ff6829b

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Pass constant reflection into ConvertNode.convert
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Thu, 18 Dec 2014 09:17:22 -0800
parents 290dc460feb3
children f57d86eb036f
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1 /*
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2 * Copyright (c) 2014, 2014, 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.calc;
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24
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25 import java.io.*;
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26 import java.util.function.*;
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27
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28 import com.oracle.graal.api.meta.*;
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29 import com.oracle.graal.compiler.common.type.*;
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30 import com.oracle.graal.compiler.common.type.ArithmeticOpTable.*;
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31 import com.oracle.graal.graph.spi.*;
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32 import com.oracle.graal.nodeinfo.*;
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33 import com.oracle.graal.nodes.*;
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34 import com.oracle.graal.nodes.spi.*;
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35
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36 /**
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37 * An {@code IntegerConvert} converts an integer to an integer of different width.
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38 */
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39 @NodeInfo
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40 public abstract class IntegerConvertNode<OP, REV> extends UnaryNode implements ConvertNode, ArithmeticLIRLowerable {
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41
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42 protected final SerializableIntegerConvertFunction<OP> getOp;
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43 protected final SerializableIntegerConvertFunction<REV> getReverseOp;
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44
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45 protected final int inputBits;
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46 protected final int resultBits;
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47
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48 protected interface SerializableIntegerConvertFunction<T> extends Function<ArithmeticOpTable, IntegerConvertOp<T>>, Serializable {
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49 }
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50
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51 protected IntegerConvertNode(SerializableIntegerConvertFunction<OP> getOp, SerializableIntegerConvertFunction<REV> getReverseOp, int inputBits, int resultBits, ValueNode input) {
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52 super(getOp.apply(ArithmeticOpTable.forStamp(input.stamp())).foldStamp(inputBits, resultBits, input.stamp()), input);
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53 this.getOp = getOp;
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54 this.getReverseOp = getReverseOp;
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55 this.inputBits = inputBits;
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56 this.resultBits = resultBits;
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57 }
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58
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59 public int getInputBits() {
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60 return inputBits;
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61 }
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62
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63 public int getResultBits() {
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64 return resultBits;
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65 }
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66
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67 protected final IntegerConvertOp<OP> getOp(ValueNode forValue) {
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68 return getOp.apply(ArithmeticOpTable.forStamp(forValue.stamp()));
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69 }
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70
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71 @Override
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72 public Constant convert(Constant c, ConstantReflectionProvider constantReflection) {
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73 return getOp(getValue()).foldConstant(getInputBits(), getResultBits(), c);
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74 }
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75
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76 @Override
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77 public Constant reverse(Constant c, ConstantReflectionProvider constantReflection) {
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78 IntegerConvertOp<REV> reverse = getReverseOp.apply(ArithmeticOpTable.forStamp(stamp()));
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79 return reverse.foldConstant(getResultBits(), getInputBits(), c);
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80 }
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81
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82 @Override
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83 public boolean inferStamp() {
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84 return updateStamp(getOp(getValue()).foldStamp(inputBits, resultBits, getValue().stamp()));
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85 }
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86
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87 @Override
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88 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
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89 if (inputBits == resultBits) {
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90 return value;
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91 } else if (value.isConstant()) {
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92 return ConstantNode.forPrimitive(stamp(), convert(forValue.asConstant(), tool.getConstantReflection()));
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93 } else {
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94 return this;
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95 }
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96 }
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97
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98 public static ValueNode convert(ValueNode input, Stamp stamp) {
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99 return convert(input, stamp, false);
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100 }
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101
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102 public static ValueNode convert(ValueNode input, Stamp stamp, StructuredGraph graph) {
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103 ValueNode convert = convert(input, stamp, false);
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104 if (!convert.isAlive()) {
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105 assert !convert.isDeleted();
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106 convert = graph.addOrUnique(convert);
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107 }
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108 return convert;
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109 }
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110
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111 public static ValueNode convertUnsigned(ValueNode input, Stamp stamp) {
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112 return convert(input, stamp, true);
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113 }
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114
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115 public static ValueNode convert(ValueNode input, Stamp stamp, boolean zeroExtend) {
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116 IntegerStamp fromStamp = (IntegerStamp) input.stamp();
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117 IntegerStamp toStamp = (IntegerStamp) stamp;
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118
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119 ValueNode result;
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120 if (toStamp.getBits() == fromStamp.getBits()) {
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121 result = input;
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122 } else if (toStamp.getBits() < fromStamp.getBits()) {
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123 result = NarrowNode.create(input, fromStamp.getBits(), toStamp.getBits());
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124 } else if (zeroExtend) {
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125 // toStamp.getBits() > fromStamp.getBits()
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126 result = ZeroExtendNode.create(input, toStamp.getBits());
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127 } else {
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128 // toStamp.getBits() > fromStamp.getBits()
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129 result = SignExtendNode.create(input, toStamp.getBits());
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130 }
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Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
131
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
132 IntegerStamp resultStamp = (IntegerStamp) result.stamp();
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
133 assert toStamp.getBits() == resultStamp.getBits();
15131
9c1e53adc159 Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents: 14707
diff changeset
134 return result;
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
135 }
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
136 }