1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
//
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
//
// Symbol table for parsing. Most functionaliy and main ideas
// are documented in the header file.
//
#if defined(_MSC_VER)
#pragma warning(disable: 4718)
#endif
#include "compiler/translator/SymbolTable.h"
#include <stdio.h>
#include <algorithm>
int TSymbolTable::uniqueIdCounter = 0;
//
// Functions have buried pointers to delete.
//
TFunction::~TFunction()
{
for (TParamList::iterator i = parameters.begin(); i != parameters.end(); ++i)
delete (*i).type;
}
//
// Symbol table levels are a map of pointers to symbols that have to be deleted.
//
TSymbolTableLevel::~TSymbolTableLevel()
{
for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
delete (*it).second;
}
bool TSymbolTableLevel::insert(TSymbol *symbol)
{
symbol->setUniqueId(TSymbolTable::nextUniqueId());
// returning true means symbol was added to the table
tInsertResult result = level.insert(tLevelPair(symbol->getMangledName(), symbol));
return result.second;
}
TSymbol *TSymbolTableLevel::find(const TString &name) const
{
tLevel::const_iterator it = level.find(name);
if (it == level.end())
return 0;
else
return (*it).second;
}
//
// Change all function entries in the table with the non-mangled name
// to be related to the provided built-in operation. This is a low
// performance operation, and only intended for symbol tables that
// live across a large number of compiles.
//
void TSymbolTableLevel::relateToOperator(const char *name, TOperator op)
{
for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
{
if ((*it).second->isFunction())
{
TFunction *function = static_cast<TFunction*>((*it).second);
if (function->getName() == name)
function->relateToOperator(op);
}
}
}
//
// Change all function entries in the table with the non-mangled name
// to be related to the provided built-in extension. This is a low
// performance operation, and only intended for symbol tables that
// live across a large number of compiles.
//
void TSymbolTableLevel::relateToExtension(const char *name, const TString &ext)
{
for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
{
TSymbol *symbol = it->second;
if (symbol->getName() == name)
symbol->relateToExtension(ext);
}
}
TSymbol::TSymbol(const TSymbol ©Of)
{
name = NewPoolTString(copyOf.name->c_str());
uniqueId = copyOf.uniqueId;
}
TSymbol *TSymbolTable::find(const TString &name, int shaderVersion,
bool *builtIn, bool *sameScope) const
{
int level = currentLevel();
TSymbol *symbol;
do
{
if (level == ESSL3_BUILTINS && shaderVersion != 300)
level--;
if (level == ESSL1_BUILTINS && shaderVersion != 100)
level--;
symbol = table[level]->find(name);
}
while (symbol == 0 && --level >= 0);
if (builtIn)
*builtIn = (level <= LAST_BUILTIN_LEVEL);
if (sameScope)
*sameScope = (level == currentLevel());
return symbol;
}
TSymbol *TSymbolTable::findBuiltIn(
const TString &name, int shaderVersion) const
{
for (int level = LAST_BUILTIN_LEVEL; level >= 0; level--)
{
if (level == ESSL3_BUILTINS && shaderVersion != 300)
level--;
if (level == ESSL1_BUILTINS && shaderVersion != 100)
level--;
TSymbol *symbol = table[level]->find(name);
if (symbol)
return symbol;
}
return 0;
}
TSymbolTable::~TSymbolTable()
{
while (table.size() > 0)
pop();
}
void TSymbolTable::insertBuiltIn(
ESymbolLevel level, TType *rvalue, const char *name,
TType *ptype1, TType *ptype2, TType *ptype3, TType *ptype4, TType *ptype5)
{
if (ptype1->getBasicType() == EbtGSampler2D)
{
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? new TType(EbtFloat, 4) : rvalue, name,
new TType(EbtSampler2D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtInt, 4) : rvalue, name,
new TType(EbtISampler2D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtUInt, 4) : rvalue, name,
new TType(EbtUSampler2D), ptype2, ptype3, ptype4, ptype5);
return;
}
if (ptype1->getBasicType() == EbtGSampler3D)
{
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? new TType(EbtFloat, 4) : rvalue, name,
new TType(EbtSampler3D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtInt, 4) : rvalue, name,
new TType(EbtISampler3D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtUInt, 4) : rvalue, name,
new TType(EbtUSampler3D), ptype2, ptype3, ptype4, ptype5);
return;
}
if (ptype1->getBasicType() == EbtGSamplerCube)
{
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? new TType(EbtFloat, 4) : rvalue, name,
new TType(EbtSamplerCube), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtInt, 4) : rvalue, name,
new TType(EbtISamplerCube), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtUInt, 4) : rvalue, name,
new TType(EbtUSamplerCube), ptype2, ptype3, ptype4, ptype5);
return;
}
if (ptype1->getBasicType() == EbtGSampler2DArray)
{
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? new TType(EbtFloat, 4) : rvalue, name,
new TType(EbtSampler2DArray), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtInt, 4) : rvalue, name,
new TType(EbtISampler2DArray), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? new TType(EbtUInt, 4) : rvalue, name,
new TType(EbtUSampler2DArray), ptype2, ptype3, ptype4, ptype5);
return;
}
TFunction *function = new TFunction(NewPoolTString(name), *rvalue);
TType *types[] = {ptype1, ptype2, ptype3, ptype4, ptype5};
for (size_t ii = 0; ii < sizeof(types) / sizeof(types[0]); ++ii)
{
if (types[ii])
{
TParameter param = {NULL, types[ii]};
function->addParameter(param);
}
}
insert(level, function);
}
TPrecision TSymbolTable::getDefaultPrecision(TBasicType type) const
{
if (!SupportsPrecision(type))
return EbpUndefined;
// unsigned integers use the same precision as signed
TBasicType baseType = (type == EbtUInt) ? EbtInt : type;
int level = static_cast<int>(precisionStack.size()) - 1;
assert(level >= 0); // Just to be safe. Should not happen.
// If we dont find anything we return this. Should we error check this?
TPrecision prec = EbpUndefined;
while (level >= 0)
{
PrecisionStackLevel::iterator it = precisionStack[level]->find(baseType);
if (it != precisionStack[level]->end())
{
prec = (*it).second;
break;
}
level--;
}
return prec;
}
|
