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annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotReferenceMap.java @ 21731:df9d2375512a

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Track max live register value in reference map
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Wed, 03 Jun 2015 20:24:05 -0700
parents b9f9b8af17ff
children
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1 /*
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2 * Copyright (c) 2009, 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.jvmci.hotspot;
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24
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25 import static com.oracle.jvmci.code.ValueUtil.*;
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26
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27 import java.util.*;
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28
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29 import com.oracle.jvmci.code.*;
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30 import com.oracle.jvmci.meta.*;
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31
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32 public final class HotSpotReferenceMap extends ReferenceMap {
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33
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34 private Value[] objects;
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35 private int[] bytesPerElement;
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36 private int maxRegisterSize;
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37 private ArrayList<Value> objectValues;
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38
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39 private final TargetDescription target;
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40
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41 public HotSpotReferenceMap(TargetDescription target) {
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42 this.target = target;
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43 this.objects = Value.NO_VALUES;
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44 }
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45
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46 @Override
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47 public void reset() {
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48 objectValues = new ArrayList<>();
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49 objects = Value.NO_VALUES;
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50 bytesPerElement = null;
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51 maxRegisterSize = 0;
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52 }
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53
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54 @Override
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55 public void addLiveValue(Value v) {
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56 if (isConstant(v)) {
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57 return;
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58 }
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59 LIRKind lirKind = v.getLIRKind();
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60 if (!lirKind.isValue()) {
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61 objectValues.add(v);
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62 }
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63 if (isRegister(v)) {
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64 int size = target.getSizeInBytes(lirKind.getPlatformKind());
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65 if (size > maxRegisterSize) {
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66 maxRegisterSize = size;
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67 }
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68 }
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69 }
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70
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71 @Override
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72 public void finish() {
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73 objects = objectValues.toArray(new Value[objectValues.size()]);
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74 this.bytesPerElement = new int[objects.length];
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75 for (int i = 0; i < objects.length; i++) {
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76 bytesPerElement[i] = bytesPerElement(objects[i].getLIRKind());
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77 }
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78 objectValues = null;
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79 }
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80
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81 private int bytesPerElement(LIRKind kind) {
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82 PlatformKind platformKind = kind.getPlatformKind();
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83 return target.getSizeInBytes(platformKind) / platformKind.getVectorLength();
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84 }
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85
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86 @Override
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87 public int hashCode() {
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88 throw new UnsupportedOperationException();
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89 }
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90
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91 @Override
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92 public boolean equals(Object obj) {
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93 if (this == obj) {
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94 return true;
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95 }
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96 if (obj instanceof HotSpotReferenceMap) {
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97 HotSpotReferenceMap that = (HotSpotReferenceMap) obj;
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98 if (Arrays.equals(objects, that.objects) && this.target.equals(that.target)) {
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99 return true;
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100 }
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101 }
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102 return false;
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103 }
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104
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105 @Override
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106 public String toString() {
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107 return Arrays.toString(objects);
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108 }
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109 }