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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/StackSlot.java @ 21607:71b338926f2e

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moved JVMCI classes into their own distributions (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Fri, 29 May 2015 22:27:38 +0200
parents 48c1ebd24120
children
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1 /*
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2 * Copyright (c) 2010, 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.code;
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24
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25 import com.oracle.jvmci.meta.LIRKind;
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26
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27 /**
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28 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame or an
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29 * incoming stack-based argument in a method's {@linkplain #isInCallerFrame() caller's frame}.
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30 */
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31 public final class StackSlot extends StackSlotValue {
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32
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33 private final int offset;
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34 private final boolean addFrameSize;
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35
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36 /**
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37 * Gets a {@link StackSlot} instance representing a stack slot at a given index holding a value
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38 * of a given kind.
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39 *
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40 * @param kind The kind of the value stored in the stack slot.
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41 * @param offset The offset of the stack slot (in bytes)
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42 * @param addFrameSize Specifies if the offset is relative to the stack pointer, or the
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43 * beginning of the frame (stack pointer + total frame size).
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44 */
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45 public static StackSlot get(LIRKind kind, int offset, boolean addFrameSize) {
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46 assert addFrameSize || offset >= 0;
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47 return new StackSlot(kind, offset, addFrameSize);
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48 }
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49
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50 /**
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51 * Private constructor to enforce use of {@link #get(LIRKind, int, boolean)} so that a cache can
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52 * be used.
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53 */
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54 private StackSlot(LIRKind kind, int offset, boolean addFrameSize) {
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55 super(kind);
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56 this.offset = offset;
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57 this.addFrameSize = addFrameSize;
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58 }
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59
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60 /**
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61 * Gets the offset of this stack slot, relative to the stack pointer.
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62 *
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63 * @return The offset of this slot (in bytes).
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64 */
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65 public int getOffset(int totalFrameSize) {
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66 assert totalFrameSize > 0 || !addFrameSize;
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67 int result = offset + (addFrameSize ? totalFrameSize : 0);
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68 assert result >= 0;
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69 return result;
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70 }
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71
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72 public boolean isInCallerFrame() {
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73 return addFrameSize && offset >= 0;
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74 }
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75
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76 public int getRawOffset() {
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77 return offset;
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78 }
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79
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80 public boolean getRawAddFrameSize() {
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81 return addFrameSize;
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82 }
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83
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84 @Override
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85 public String toString() {
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86 if (!addFrameSize) {
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87 return "out:" + offset + getKindSuffix();
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88 } else if (offset >= 0) {
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89 return "in:" + offset + getKindSuffix();
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90 } else {
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91 return "stack:" + (-offset) + getKindSuffix();
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92 }
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93 }
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94
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95 /**
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96 * Gets this stack slot used to pass an argument from the perspective of a caller.
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97 */
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98 public StackSlot asOutArg() {
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99 assert offset >= 0;
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100 if (addFrameSize) {
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101 return get(getLIRKind(), offset, false);
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102 }
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103 return this;
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104 }
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105
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106 /**
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107 * Gets this stack slot used to pass an argument from the perspective of a callee.
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108 */
5547
b6617d13ea44 Dropping Ci* prefixes. Some additional renamings in the api.code interface.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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109 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>
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110 assert offset >= 0;
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111 if (!addFrameSize) {
16094
c0b8d395368b Introduce LIRKind to accurately track oop references in backend.
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112 return get(getLIRKind(), offset, true);
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113 }
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114 return this;
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115 }
9631
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Bernhard Urban <bernhard.urban@jku.at>
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116
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Bernhard Urban <bernhard.urban@jku.at>
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117 @Override
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118 public int hashCode() {
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119 final int prime = 37;
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120 int result = super.hashCode();
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121 result = prime * result + (addFrameSize ? 1231 : 1237);
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122 result = prime * result + offset;
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123 return result;
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124 }
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125
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126 @Override
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127 public boolean equals(Object obj) {
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128 if (obj instanceof StackSlot) {
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129 StackSlot other = (StackSlot) obj;
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130 return super.equals(obj) && addFrameSize == other.addFrameSize && offset == other.offset;
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131 }
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132 return false;
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133 }
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134 }