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14
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"
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2 |
COPYRIGHT (c) 1994 by Claus Gittinger
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53
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3 |
All Rights Reserved
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14
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4 |
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5 |
This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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7 |
inclusion of the above copyright notice. This software may not
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8 |
be provided or otherwise made available to, or used by, any
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9 |
other person. No title to or ownership of the software is
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10 |
hereby transferred.
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11 |
"
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PrimaryNode subclass:#VariableNode
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instanceVariableNames:'name token selfValue selfClass index block'
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classVariableNames:''
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poolDictionaries:''
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17 |
category:'System-Compiler-Support'
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18 |
!
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19 |
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20 |
VariableNode comment:'
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COPYRIGHT (c) 1994 by Claus Gittinger
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53
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22 |
All Rights Reserved
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31
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23 |
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98
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24 |
$Header: /cvs/stx/stx/libcomp/Attic/VarNode.st,v 1.5 1995-07-23 02:24:51 claus Exp $
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20
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25 |
'!
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14
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26 |
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20
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27 |
!VariableNode class methodsFor:'documentation'!
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28 |
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29 |
copyright
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30 |
"
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31 |
COPYRIGHT (c) 1994 by Claus Gittinger
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53
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32 |
All Rights Reserved
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20
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33 |
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34 |
This software is furnished under a license and may be used
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35 |
only in accordance with the terms of that license and with the
|
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|
36 |
inclusion of the above copyright notice. This software may not
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37 |
be provided or otherwise made available to, or used by, any
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38 |
other person. No title to or ownership of the software is
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39 |
hereby transferred.
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40 |
"
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41 |
!
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42 |
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43 |
version
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44 |
"
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98
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45 |
$Header: /cvs/stx/stx/libcomp/Attic/VarNode.st,v 1.5 1995-07-23 02:24:51 claus Exp $
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20
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46 |
"
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47 |
!
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48 |
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49 |
documentation
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50 |
"
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51 |
node for parse-trees, representing variables
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52 |
"
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53 |
! !
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14
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54 |
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55 |
!VariableNode class methodsFor:'instance creation'!
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56 |
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57 |
type:t token:tok
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58 |
^ (self basicNew) type:t token:tok
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59 |
!
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60 |
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61 |
type:t name:n
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62 |
^ (self basicNew) type:t name:n
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63 |
!
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64 |
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98
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65 |
type:t class:class name:n
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66 |
^ (self basicNew) type:t class:class name:n
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67 |
!
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68 |
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14
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69 |
type:t index:i selfValue:s
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^ (self basicNew) type:t index:i selfValue:s
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71 |
!
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72 |
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73 |
type:t name:n value:val
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74 |
^ (self basicNew) type:t name:n value:val
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75 |
!
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76 |
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77 |
type:t name:n token:tok index:i
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78 |
^ (self basicNew) type:t name:n token:tok index:i
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79 |
!
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80 |
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81 |
type:t name:n index:i selfValue:s
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82 |
^ (self basicNew) type:t name:n index:i selfValue:s
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83 |
!
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84 |
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85 |
type:t name:n index:i selfClass:s
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86 |
^ (self basicNew) type:t name:n index:i selfClass:s
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87 |
!
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88 |
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89 |
type:t name:n token:tok index:i block:b
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90 |
^ (self basicNew) type:t name:n token:tok index:i block:b
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91 |
!
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92 |
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93 |
type:t token:tok index:i
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94 |
^ (self basicNew) type:t token:tok index:i
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95 |
!
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96 |
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97 |
type:t token:tok index:i block:b
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98 |
^ (self basicNew) type:t token:tok index:i block:b
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99 |
! !
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100 |
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53
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101 |
!VariableNode methodsFor:'queries'!
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102 |
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103 |
isGlobal
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104 |
"return true, if this is a node for a global variable"
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105 |
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106 |
^ (type == #GlobalVariable) and:[Smalltalk includesKey:name]
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107 |
! !
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108 |
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14
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109 |
!VariableNode methodsFor:'accessing'!
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110 |
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111 |
type:t token:tok
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112 |
type := t.
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113 |
token := tok
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114 |
!
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115 |
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116 |
type:t token:tok index:i
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117 |
type := t.
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118 |
index := i.
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119 |
token := tok
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120 |
!
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121 |
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122 |
type:t token:tok index:i block:b
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123 |
type := t.
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124 |
index := i.
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125 |
block := b.
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126 |
token := tok
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127 |
!
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128 |
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129 |
type:t name:n
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130 |
type := t.
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131 |
value := nil.
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132 |
name := n
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133 |
!
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134 |
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135 |
type:t index:i selfValue:s
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136 |
type := t.
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137 |
value := nil.
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138 |
index := i.
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|
139 |
selfValue := s
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140 |
!
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141 |
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98
|
142 |
type:t class:class name:n
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|
143 |
type := t.
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|
144 |
value := nil.
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145 |
name := n.
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|
146 |
selfClass := class
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147 |
!
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148 |
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14
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149 |
type:t name:n value:val
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150 |
type := t.
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|
151 |
name := n.
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|
152 |
value := val
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|
153 |
!
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154 |
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155 |
type:t name:n index:i selfValue:s
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|
156 |
type := t.
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|
157 |
value := nil.
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|
158 |
index := i.
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|
159 |
selfValue := s.
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|
160 |
name := n
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|
161 |
!
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162 |
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163 |
type:t name:n index:i selfClass:s
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|
164 |
type := t.
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|
165 |
value := nil.
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|
166 |
index := i.
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|
167 |
selfClass := s.
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|
168 |
name := n
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169 |
!
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170 |
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171 |
type:t name:n token:tok index:i
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172 |
type := t.
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|
173 |
index := i.
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|
174 |
token := tok.
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|
175 |
name := n
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176 |
!
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177 |
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178 |
type:t name:n token:tok index:i block:b
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179 |
type := t.
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180 |
index := i.
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181 |
block := b.
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182 |
token := tok.
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183 |
name := n
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184 |
!
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185 |
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186 |
name
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187 |
^ name
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188 |
!
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189 |
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190 |
index
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191 |
^ index
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192 |
! !
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193 |
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194 |
!VariableNode methodsFor:'evaluating'!
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195 |
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196 |
evaluate
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98
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197 |
(type == #MethodVariable
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|
198 |
or:[type == #BlockArg
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|
199 |
or:[type == #BlockVariable]]) ifTrue:[
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53
|
200 |
^ token variableValue
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14
|
201 |
].
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|
202 |
(type == #InstanceVariable) ifTrue:[
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53
|
203 |
^ selfValue instVarAt:index
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14
|
204 |
].
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|
205 |
(type == #GlobalVariable) ifTrue:[
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53
|
206 |
(Smalltalk includesKey:name) ifTrue:[
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|
207 |
^ Smalltalk at:name
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|
208 |
].
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14
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209 |
"
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53
|
210 |
self error:('global ' , name , ' is undefined').
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14
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211 |
"
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|
212 |
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53
|
213 |
^ UndefinedVariable name:name.
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|
214 |
^ nil
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14
|
215 |
].
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|
216 |
(type == #ClassVariable) ifTrue:[
|
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98
|
217 |
^ Smalltalk at:(selfClass name , ':' , name) asSymbol
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14
|
218 |
].
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|
219 |
(type == #ClassInstanceVariable) ifTrue:[
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53
|
220 |
^ selfClass instVarAt:index
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14
|
221 |
].
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222 |
(type == #ThisContext) ifTrue:[
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53
|
223 |
^ thisContext
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14
|
224 |
].
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|
225 |
"not reached"
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|
226 |
self halt:'bad type'.
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227 |
^ value
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|
228 |
!
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229 |
|
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230 |
store:aValue
|
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98
|
231 |
(type == #MethodVariable
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|
232 |
or:[type == #BlockVariable]) ifTrue:[
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53
|
233 |
token value:aValue. ^ aValue
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14
|
234 |
].
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|
235 |
(type == #InstanceVariable) ifTrue:[
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53
|
236 |
^ selfValue instVarAt:index put:aValue
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14
|
237 |
].
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|
238 |
(type == #GlobalVariable) ifTrue:[
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53
|
239 |
^ Smalltalk at:name put:aValue
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|
14
|
240 |
].
|
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|
241 |
(type == #ClassVariable) ifTrue:[
|
|
98
|
242 |
^ Smalltalk at:(selfClass name , ':' , name) asSymbol put:aValue
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14
|
243 |
].
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|
244 |
(type == #ClassInstanceVariable) ifTrue:[
|
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53
|
245 |
^ selfClass instVarAt:index put:aValue
|
|
14
|
246 |
].
|
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|
247 |
"not reached"
|
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|
248 |
self halt:'bad type'.
|
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|
249 |
^ aValue
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|
250 |
! !
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|
251 |
|
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|
252 |
!VariableNode methodsFor:'code generation'!
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253 |
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254 |
codeForSideEffectOn:aStream inBlock:b
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|
255 |
"no code at all"
|
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|
256 |
^ self
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|
257 |
!
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258 |
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259 |
codeOn:aStream inBlock:codeBlock
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260 |
|theCode b deltaLevel|
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261 |
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|
262 |
(type == #MethodArg) ifTrue:[
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53
|
263 |
(index <= 4) ifTrue:[
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|
264 |
aStream nextPut:(#(pushMethodArg1
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|
265 |
pushMethodArg2
|
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|
266 |
pushMethodArg3
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|
267 |
pushMethodArg4) at:index).
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|
268 |
^ self
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|
269 |
].
|
|
98
|
270 |
aStream nextPut:#pushMethodArg; nextPut:index.
|
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53
|
271 |
^ self
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|
14
|
272 |
].
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|
273 |
(type == #MethodVariable) ifTrue:[
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53
|
274 |
(index <= 6) ifTrue:[
|
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|
275 |
aStream nextPut:(#(pushMethodVar1
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|
276 |
pushMethodVar2
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|
277 |
pushMethodVar3
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|
278 |
pushMethodVar4
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|
279 |
pushMethodVar5
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|
280 |
pushMethodVar6) at:index).
|
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|
281 |
^ self
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|
282 |
].
|
|
98
|
283 |
aStream nextPut:#pushMethodVar; nextPut:index.
|
|
53
|
284 |
^ self
|
|
14
|
285 |
].
|
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|
286 |
(type == #InstanceVariable) ifTrue:[
|
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53
|
287 |
(index <= 10) ifTrue:[
|
|
|
288 |
theCode := #(pushInstVar1 pushInstVar2 pushInstVar3
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|
|
289 |
pushInstVar4 pushInstVar5 pushInstVar6
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|
290 |
pushInstVar7 pushInstVar8 pushInstVar9
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|
291 |
pushInstVar10) at:index.
|
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|
292 |
aStream nextPut:theCode.
|
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|
293 |
^ self
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|
294 |
].
|
|
98
|
295 |
aStream nextPut:#pushInstVar; nextPut:index.
|
|
53
|
296 |
^ self
|
|
14
|
297 |
].
|
|
|
298 |
(type == #BlockArg) ifTrue:[
|
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53
|
299 |
"find deltaLevel to block, where argument was defined"
|
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|
300 |
b := codeBlock.
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|
301 |
deltaLevel := 0.
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|
302 |
[b notNil and:[b ~~ block]] whileTrue:[
|
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|
303 |
b inlineBlock ifFalse:[
|
|
|
304 |
deltaLevel := deltaLevel + 1
|
|
|
305 |
].
|
|
|
306 |
b := b home
|
|
|
307 |
].
|
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|
308 |
(deltaLevel == 0) ifTrue:[
|
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|
309 |
(index <= 4) ifTrue:[
|
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|
310 |
theCode := #(pushBlockArg1 pushBlockArg2 pushBlockArg3
|
|
|
311 |
pushBlockArg4) at:index.
|
|
|
312 |
aStream nextPut:theCode.
|
|
|
313 |
^ self
|
|
|
314 |
].
|
|
|
315 |
aStream nextPut:#pushBlockArg.
|
|
|
316 |
] ifFalse:[
|
|
|
317 |
(deltaLevel == 1) ifTrue:[
|
|
|
318 |
aStream nextPut:#pushOuter1BlockArg
|
|
|
319 |
] ifFalse:[
|
|
|
320 |
(deltaLevel == 2) ifTrue:[
|
|
|
321 |
aStream nextPut:#pushOuter2BlockArg
|
|
|
322 |
] ifFalse:[
|
|
98
|
323 |
aStream nextPut:#pushOuterBlockArg; nextPut:deltaLevel
|
|
53
|
324 |
]
|
|
|
325 |
].
|
|
|
326 |
].
|
|
98
|
327 |
aStream nextPut:index.
|
|
53
|
328 |
^ self
|
|
14
|
329 |
].
|
|
|
330 |
(type == #GlobalVariable) ifTrue:[
|
|
98
|
331 |
aStream nextPut:#pushGlobal; nextPut:name.
|
|
|
332 |
"slot for generation and cell address (4 byte)"
|
|
|
333 |
aStream nextPut:0; nextPut:0; nextPut:0; nextPut:0; nextPut:0.
|
|
53
|
334 |
^ self
|
|
14
|
335 |
].
|
|
|
336 |
(type == #ClassVariable) ifTrue:[
|
|
98
|
337 |
aStream nextPut:#pushClassVar; nextPut:(selfClass name , ':' , name) asSymbol.
|
|
|
338 |
"slot for generation and cell address (4 byte)"
|
|
|
339 |
aStream nextPut:0; nextPut:0; nextPut:0; nextPut:0; nextPut:0.
|
|
53
|
340 |
^ self
|
|
14
|
341 |
].
|
|
|
342 |
(type == #BlockVariable) ifTrue:[
|
|
53
|
343 |
"find deltaLevel to block, where variable was defined"
|
|
|
344 |
b := codeBlock.
|
|
|
345 |
deltaLevel := 0.
|
|
|
346 |
[b notNil and:[b ~~ block]] whileTrue:[
|
|
|
347 |
b inlineBlock ifFalse:[
|
|
|
348 |
deltaLevel := deltaLevel + 1
|
|
|
349 |
].
|
|
|
350 |
b := b home
|
|
|
351 |
].
|
|
14
|
352 |
|
|
53
|
353 |
(deltaLevel == 0) ifTrue:[
|
|
|
354 |
aStream nextPut:#pushBlockVar.
|
|
|
355 |
] ifFalse:[
|
|
98
|
356 |
aStream nextPut:#pushOuterBlockVar; nextPut:deltaLevel.
|
|
53
|
357 |
].
|
|
98
|
358 |
aStream nextPut:index.
|
|
53
|
359 |
^ self
|
|
14
|
360 |
].
|
|
|
361 |
(type == #ClassInstanceVariable) ifTrue:[
|
|
98
|
362 |
aStream nextPut:#pushClassInstVar; nextPut:index.
|
|
53
|
363 |
^ self
|
|
14
|
364 |
].
|
|
|
365 |
(type == #ThisContext) ifTrue:[
|
|
53
|
366 |
aStream nextPut:#pushThisContext. ^ self
|
|
14
|
367 |
].
|
|
|
368 |
|
|
|
369 |
"can this be reached ?"
|
|
|
370 |
|
|
|
371 |
"not reached"
|
|
|
372 |
self halt:'bad type'.
|
|
|
373 |
|
|
98
|
374 |
aStream nextPut:#pushLit; nextPut:value
|
|
14
|
375 |
!
|
|
|
376 |
|
|
|
377 |
codeStoreOn:aStream inBlock:codeBlock valueNeeded:valueNeeded
|
|
98
|
378 |
|theCode b deltaLevel nm|
|
|
14
|
379 |
|
|
|
380 |
valueNeeded ifTrue:[
|
|
53
|
381 |
aStream nextPut:#dup
|
|
14
|
382 |
].
|
|
|
383 |
(type == #MethodVariable) ifTrue:[
|
|
53
|
384 |
(index <= 6) ifTrue:[
|
|
|
385 |
theCode := #(storeMethodVar1 storeMethodVar2
|
|
|
386 |
storeMethodVar3 storeMethodVar4
|
|
|
387 |
storeMethodVar5 storeMethodVar6) at:index.
|
|
|
388 |
aStream nextPut:theCode.
|
|
|
389 |
^ self
|
|
|
390 |
].
|
|
98
|
391 |
aStream nextPut:#storeMethodVar; nextPut:index.
|
|
53
|
392 |
^ self
|
|
14
|
393 |
].
|
|
|
394 |
(type == #InstanceVariable) ifTrue:[
|
|
53
|
395 |
(index <= 10) ifTrue:[
|
|
|
396 |
theCode := #(storeInstVar1 storeInstVar2
|
|
|
397 |
storeInstVar3 storeInstVar4
|
|
|
398 |
storeInstVar5 storeInstVar6
|
|
|
399 |
storeInstVar7 storeInstVar8
|
|
|
400 |
storeInstVar9 storeInstVar10) at:index.
|
|
|
401 |
aStream nextPut:theCode.
|
|
|
402 |
^ self
|
|
|
403 |
].
|
|
98
|
404 |
aStream nextPut:#storeInstVar; nextPut:index.
|
|
53
|
405 |
^ self
|
|
14
|
406 |
].
|
|
|
407 |
(type == #GlobalVariable) ifTrue:[
|
|
98
|
408 |
aStream nextPut:#storeGlobal; nextPut:name.
|
|
|
409 |
"slot for generation and cell address (4 byte)"
|
|
|
410 |
aStream nextPut:0; nextPut:0; nextPut:0; nextPut:0; nextPut:0.
|
|
53
|
411 |
^ self
|
|
14
|
412 |
].
|
|
|
413 |
(type == #BlockVariable) ifTrue:[
|
|
53
|
414 |
"find deltaLevel to block, where variable was defined"
|
|
|
415 |
b := codeBlock.
|
|
|
416 |
deltaLevel := 0.
|
|
|
417 |
[b notNil and:[b ~~ block]] whileTrue:[
|
|
|
418 |
b inlineBlock ifFalse:[
|
|
|
419 |
deltaLevel := deltaLevel + 1
|
|
|
420 |
].
|
|
|
421 |
b := b home
|
|
|
422 |
].
|
|
14
|
423 |
|
|
53
|
424 |
(deltaLevel == 0) ifTrue:[
|
|
98
|
425 |
aStream nextPut:#storeBlockVar
|
|
53
|
426 |
] ifFalse:[
|
|
98
|
427 |
aStream nextPut:#storeOuterBlockVar; nextPut:deltaLevel
|
|
53
|
428 |
].
|
|
98
|
429 |
aStream nextPut:index.
|
|
53
|
430 |
^ self
|
|
14
|
431 |
].
|
|
|
432 |
(type == #ClassVariable) ifTrue:[
|
|
98
|
433 |
aStream nextPut:#storeClassVar; nextPut:(selfClass name , ':' , name) asSymbol.
|
|
|
434 |
"slot for generation and cell address (4 byte)"
|
|
|
435 |
aStream nextPut:0; nextPut:0; nextPut:0; nextPut:0; nextPut:0.
|
|
53
|
436 |
^ self
|
|
14
|
437 |
].
|
|
|
438 |
(type == #ClassInstanceVariable) ifTrue:[
|
|
98
|
439 |
aStream nextPut:#storeClassInstVar; nextPut:index.
|
|
53
|
440 |
^ self
|
|
14
|
441 |
].
|
|
|
442 |
"cannot be reached"
|
|
|
443 |
^ self error:'bad assignment'
|
|
|
444 |
! !
|
|
|
445 |
|
|
|
446 |
!VariableNode methodsFor:'printing'!
|
|
|
447 |
|
|
|
448 |
displayString
|
|
|
449 |
^ 'InterpreterVariable(' , self printString , ')'
|
|
|
450 |
!
|
|
|
451 |
|
|
|
452 |
printOn:aStream indent:i
|
|
98
|
453 |
|
|
|
454 |
(type == #MethodArg "/ actually only a debug-check
|
|
|
455 |
or:[type == #MethodVariable
|
|
|
456 |
or:[type == #InstanceVariable
|
|
|
457 |
or:[type == #BlockArg
|
|
|
458 |
or:[type == #GlobalVariable
|
|
|
459 |
or:[type == #ClassVariable
|
|
|
460 |
or:[type == #BlockVariable
|
|
|
461 |
or:[type == #ClassInstanceVariable]]]]]]]) ifTrue:[
|
|
53
|
462 |
aStream nextPutAll:name. ^ self
|
|
14
|
463 |
].
|
|
|
464 |
(type == #ThisContext) ifTrue:[
|
|
53
|
465 |
aStream nextPutAll:'thisContext'. ^ self
|
|
14
|
466 |
].
|
|
|
467 |
"not reached"
|
|
|
468 |
self halt:'bad type'.
|
|
|
469 |
! !
|