Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/StackSlot.java @ 24218:719853999215 jvmci-0.32

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Merge with jdk8u141-b15
author Doug Simon <doug.simon@oracle.com>
date Mon, 14 Aug 2017 23:20:38 +0200
parents 9ed5b586018b
children
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1 /*
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2 * Copyright (c) 2010, 2016, 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 jdk.vm.ci.code;
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24
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25 import jdk.vm.ci.meta.AllocatableValue;
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26 import jdk.vm.ci.meta.ValueKind;
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27
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28 /**
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29 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame or an
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30 * incoming stack-based argument in a method's {@linkplain #isInCallerFrame() caller's frame}.
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31 */
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32 public final class StackSlot extends AllocatableValue {
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33
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34 private final int offset;
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35 private final boolean addFrameSize;
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36
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37 /**
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38 * Gets a {@link StackSlot} instance representing a stack slot at a given index holding a value
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39 * of a given kind.
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40 *
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41 * @param kind The kind of the value stored in the stack slot.
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42 * @param offset The offset of the stack slot (in bytes)
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43 * @param addFrameSize Specifies if the offset is relative to the stack pointer, or the
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44 * beginning of the frame (stack pointer + total frame size).
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45 */
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46 public static StackSlot get(ValueKind<?> kind, int offset, boolean addFrameSize) {
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47 assert addFrameSize || offset >= 0;
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48 return new StackSlot(kind, offset, addFrameSize);
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49 }
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50
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51 /**
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52 * Private constructor to enforce use of {@link #get(ValueKind, int, boolean)} so that a cache
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53 * can be used.
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54 */
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55 private StackSlot(ValueKind<?> kind, int offset, boolean addFrameSize) {
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56 super(kind);
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57 this.offset = offset;
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58 this.addFrameSize = addFrameSize;
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59 }
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60
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61 /**
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62 * Gets the offset of this stack slot, relative to the stack pointer.
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63 *
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64 * @return The offset of this slot (in bytes).
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65 */
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66 public int getOffset(int totalFrameSize) {
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67 assert totalFrameSize > 0 || !addFrameSize;
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68 int result = offset + (addFrameSize ? totalFrameSize : 0);
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69 assert result >= 0;
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70 return result;
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71 }
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72
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73 public boolean isInCallerFrame() {
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74 return addFrameSize && offset >= 0;
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75 }
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76
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77 public int getRawOffset() {
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78 return offset;
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79 }
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80
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81 public boolean getRawAddFrameSize() {
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82 return addFrameSize;
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83 }
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84
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85 @Override
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86 public String toString() {
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87 if (!addFrameSize) {
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88 return "out:" + offset + getKindSuffix();
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89 } else if (offset >= 0) {
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90 return "in:" + offset + getKindSuffix();
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91 } else {
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92 return "stack:" + (-offset) + getKindSuffix();
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93 }
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94 }
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96 /**
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97 * Gets this stack slot used to pass an argument from the perspective of a caller.
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98 */
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99 public StackSlot asOutArg() {
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100 assert offset >= 0;
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101 if (addFrameSize) {
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102 return get(getValueKind(), offset, false);
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103 }
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104 return this;
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105 }
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106
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107 /**
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108 * Gets this stack slot used to pass an argument from the perspective of a callee.
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109 */
5547
b6617d13ea44 Dropping Ci* prefixes. Some additional renamings in the api.code interface.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 5540
diff changeset
110 public StackSlot asInArg() {
4181
319860ae697a Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
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111 assert offset >= 0;
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Christian Wimmer <Christian.Wimmer@Oracle.com>
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112 if (!addFrameSize) {
23396
9ed5b586018b Replace LIRKind with abstract base class (JDK-8156942).
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113 return get(getValueKind(), offset, true);
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114 }
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115 return this;
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116 }
9631
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Bernhard Urban <bernhard.urban@jku.at>
parents: 9509
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117
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Bernhard Urban <bernhard.urban@jku.at>
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118 @Override
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119 public int hashCode() {
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120 final int prime = 37;
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121 int result = super.hashCode();
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122 result = prime * result + (addFrameSize ? 1231 : 1237);
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123 result = prime * result + offset;
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124 return result;
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125 }
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126
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127 @Override
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128 public boolean equals(Object obj) {
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129 if (obj instanceof StackSlot) {
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130 StackSlot other = (StackSlot) obj;
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131 return super.equals(obj) && addFrameSize == other.addFrameSize && offset == other.offset;
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132 }
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133 return false;
9631
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134 }
3733
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135 }