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//
// 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 "compiler/translator/Cache.h"
#include "compiler/translator/IntermNode.h"
#include <stdio.h>
#include <algorithm>
namespace sh
{
namespace
{
static const char kFunctionMangledNameSeparator = '(';
} // anonymous namespace
int TSymbolTable::uniqueIdCounter = 0;
TSymbolUniqueId::TSymbolUniqueId() : mId(TSymbolTable::nextUniqueId())
{
}
TSymbolUniqueId::TSymbolUniqueId(const TSymbol &symbol) : mId(symbol.getUniqueId())
{
}
int TSymbolUniqueId::get() const
{
return mId;
}
TSymbol::TSymbol(const TString *n) : uniqueId(TSymbolTable::nextUniqueId()), name(n)
{
}
//
// Functions have buried pointers to delete.
//
TFunction::~TFunction()
{
clearParameters();
}
void TFunction::clearParameters()
{
for (TParamList::iterator i = parameters.begin(); i != parameters.end(); ++i)
delete (*i).type;
parameters.clear();
mangledName = nullptr;
}
void TFunction::swapParameters(const TFunction &parametersSource)
{
clearParameters();
for (auto parameter : parametersSource.parameters)
{
addParameter(parameter);
}
}
const TString *TFunction::buildMangledName() const
{
std::string newName = getName().c_str();
newName += kFunctionMangledNameSeparator;
for (const auto &p : parameters)
{
newName += p.type->getMangledName().c_str();
}
return NewPoolTString(newName.c_str());
}
const TString &TFunction::GetMangledNameFromCall(const TString &functionName,
const TIntermSequence &arguments)
{
std::string newName = functionName.c_str();
newName += kFunctionMangledNameSeparator;
for (TIntermNode *argument : arguments)
{
newName += argument->getAsTyped()->getType().getMangledName().c_str();
}
return *NewPoolTString(newName.c_str());
}
//
// 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)
{
// returning true means symbol was added to the table
tInsertResult result = level.insert(tLevelPair(symbol->getMangledName(), symbol));
return result.second;
}
bool TSymbolTableLevel::insertUnmangled(TFunction *function)
{
// returning true means symbol was added to the table
tInsertResult result = level.insert(tLevelPair(function->getName(), function));
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;
}
TSymbol *TSymbolTable::find(const TString &name,
int shaderVersion,
bool *builtIn,
bool *sameScope) const
{
int level = currentLevel();
TSymbol *symbol;
do
{
if (level == ESSL3_1_BUILTINS && shaderVersion != 310)
level--;
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::findGlobal(const TString &name) const
{
ASSERT(table.size() > GLOBAL_LEVEL);
return table[GLOBAL_LEVEL]->find(name);
}
TSymbol *TSymbolTable::findBuiltIn(const TString &name, int shaderVersion) const
{
for (int level = LAST_BUILTIN_LEVEL; level >= 0; level--)
{
if (level == ESSL3_1_BUILTINS && shaderVersion != 310)
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();
}
bool IsGenType(const TType *type)
{
if (type)
{
TBasicType basicType = type->getBasicType();
return basicType == EbtGenType || basicType == EbtGenIType || basicType == EbtGenUType ||
basicType == EbtGenBType;
}
return false;
}
bool IsVecType(const TType *type)
{
if (type)
{
TBasicType basicType = type->getBasicType();
return basicType == EbtVec || basicType == EbtIVec || basicType == EbtUVec ||
basicType == EbtBVec;
}
return false;
}
const TType *SpecificType(const TType *type, int size)
{
ASSERT(size >= 1 && size <= 4);
if (!type)
{
return nullptr;
}
ASSERT(!IsVecType(type));
switch (type->getBasicType())
{
case EbtGenType:
return TCache::getType(EbtFloat, type->getQualifier(),
static_cast<unsigned char>(size));
case EbtGenIType:
return TCache::getType(EbtInt, type->getQualifier(), static_cast<unsigned char>(size));
case EbtGenUType:
return TCache::getType(EbtUInt, type->getQualifier(), static_cast<unsigned char>(size));
case EbtGenBType:
return TCache::getType(EbtBool, type->getQualifier(), static_cast<unsigned char>(size));
default:
return type;
}
}
const TType *VectorType(const TType *type, int size)
{
ASSERT(size >= 2 && size <= 4);
if (!type)
{
return nullptr;
}
ASSERT(!IsGenType(type));
switch (type->getBasicType())
{
case EbtVec:
return TCache::getType(EbtFloat, static_cast<unsigned char>(size));
case EbtIVec:
return TCache::getType(EbtInt, static_cast<unsigned char>(size));
case EbtUVec:
return TCache::getType(EbtUInt, static_cast<unsigned char>(size));
case EbtBVec:
return TCache::getType(EbtBool, static_cast<unsigned char>(size));
default:
return type;
}
}
void TSymbolTable::insertBuiltIn(ESymbolLevel level,
TOperator op,
const char *ext,
const TType *rvalue,
const char *name,
const TType *ptype1,
const TType *ptype2,
const TType *ptype3,
const TType *ptype4,
const TType *ptype5)
{
if (ptype1->getBasicType() == EbtGSampler2D)
{
insertUnmangledBuiltInName(name, level);
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtFloat, 4) : rvalue, name,
TCache::getType(EbtSampler2D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtInt, 4) : rvalue, name,
TCache::getType(EbtISampler2D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtUInt, 4) : rvalue, name,
TCache::getType(EbtUSampler2D), ptype2, ptype3, ptype4, ptype5);
}
else if (ptype1->getBasicType() == EbtGSampler3D)
{
insertUnmangledBuiltInName(name, level);
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtFloat, 4) : rvalue, name,
TCache::getType(EbtSampler3D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtInt, 4) : rvalue, name,
TCache::getType(EbtISampler3D), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtUInt, 4) : rvalue, name,
TCache::getType(EbtUSampler3D), ptype2, ptype3, ptype4, ptype5);
}
else if (ptype1->getBasicType() == EbtGSamplerCube)
{
insertUnmangledBuiltInName(name, level);
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtFloat, 4) : rvalue, name,
TCache::getType(EbtSamplerCube), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtInt, 4) : rvalue, name,
TCache::getType(EbtISamplerCube), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtUInt, 4) : rvalue, name,
TCache::getType(EbtUSamplerCube), ptype2, ptype3, ptype4, ptype5);
}
else if (ptype1->getBasicType() == EbtGSampler2DArray)
{
insertUnmangledBuiltInName(name, level);
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtFloat, 4) : rvalue, name,
TCache::getType(EbtSampler2DArray), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtInt, 4) : rvalue, name,
TCache::getType(EbtISampler2DArray), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtUInt, 4) : rvalue, name,
TCache::getType(EbtUSampler2DArray), ptype2, ptype3, ptype4, ptype5);
}
else if (ptype1->getBasicType() == EbtGSampler2DMS)
{
insertUnmangledBuiltInName(name, level);
bool gvec4 = (rvalue->getBasicType() == EbtGVec4);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtFloat, 4) : rvalue, name,
TCache::getType(EbtSampler2DMS), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtInt, 4) : rvalue, name,
TCache::getType(EbtISampler2DMS), ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, gvec4 ? TCache::getType(EbtUInt, 4) : rvalue, name,
TCache::getType(EbtUSampler2DMS), ptype2, ptype3, ptype4, ptype5);
}
else if (IsGImage(ptype1->getBasicType()))
{
insertUnmangledBuiltInName(name, level);
const TType *floatType = TCache::getType(EbtFloat, 4);
const TType *intType = TCache::getType(EbtInt, 4);
const TType *unsignedType = TCache::getType(EbtUInt, 4);
const TType *floatImage =
TCache::getType(convertGImageToFloatImage(ptype1->getBasicType()));
const TType *intImage = TCache::getType(convertGImageToIntImage(ptype1->getBasicType()));
const TType *unsignedImage =
TCache::getType(convertGImageToUnsignedImage(ptype1->getBasicType()));
// GLSL ES 3.10, Revision 4, 8.12 Image Functions
if (rvalue->getBasicType() == EbtGVec4)
{
// imageLoad
insertBuiltIn(level, floatType, name, floatImage, ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, intType, name, intImage, ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, unsignedType, name, unsignedImage, ptype2, ptype3, ptype4, ptype5);
}
else if (rvalue->getBasicType() == EbtVoid)
{
// imageStore
insertBuiltIn(level, rvalue, name, floatImage, ptype2, floatType, ptype4, ptype5);
insertBuiltIn(level, rvalue, name, intImage, ptype2, intType, ptype4, ptype5);
insertBuiltIn(level, rvalue, name, unsignedImage, ptype2, unsignedType, ptype4, ptype5);
}
else
{
// imageSize
insertBuiltIn(level, rvalue, name, floatImage, ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, rvalue, name, intImage, ptype2, ptype3, ptype4, ptype5);
insertBuiltIn(level, rvalue, name, unsignedImage, ptype2, ptype3, ptype4, ptype5);
}
}
else if (IsGenType(rvalue) || IsGenType(ptype1) || IsGenType(ptype2) || IsGenType(ptype3) ||
IsGenType(ptype4))
{
ASSERT(!ptype5);
insertUnmangledBuiltInName(name, level);
insertBuiltIn(level, op, ext, SpecificType(rvalue, 1), name, SpecificType(ptype1, 1),
SpecificType(ptype2, 1), SpecificType(ptype3, 1), SpecificType(ptype4, 1));
insertBuiltIn(level, op, ext, SpecificType(rvalue, 2), name, SpecificType(ptype1, 2),
SpecificType(ptype2, 2), SpecificType(ptype3, 2), SpecificType(ptype4, 2));
insertBuiltIn(level, op, ext, SpecificType(rvalue, 3), name, SpecificType(ptype1, 3),
SpecificType(ptype2, 3), SpecificType(ptype3, 3), SpecificType(ptype4, 3));
insertBuiltIn(level, op, ext, SpecificType(rvalue, 4), name, SpecificType(ptype1, 4),
SpecificType(ptype2, 4), SpecificType(ptype3, 4), SpecificType(ptype4, 4));
}
else if (IsVecType(rvalue) || IsVecType(ptype1) || IsVecType(ptype2) || IsVecType(ptype3))
{
ASSERT(!ptype4 && !ptype5);
insertUnmangledBuiltInName(name, level);
insertBuiltIn(level, op, ext, VectorType(rvalue, 2), name, VectorType(ptype1, 2),
VectorType(ptype2, 2), VectorType(ptype3, 2));
insertBuiltIn(level, op, ext, VectorType(rvalue, 3), name, VectorType(ptype1, 3),
VectorType(ptype2, 3), VectorType(ptype3, 3));
insertBuiltIn(level, op, ext, VectorType(rvalue, 4), name, VectorType(ptype1, 4),
VectorType(ptype2, 4), VectorType(ptype3, 4));
}
else
{
TFunction *function = new TFunction(NewPoolTString(name), rvalue, op, ext);
function->addParameter(TConstParameter(ptype1));
if (ptype2)
{
function->addParameter(TConstParameter(ptype2));
}
if (ptype3)
{
function->addParameter(TConstParameter(ptype3));
}
if (ptype4)
{
function->addParameter(TConstParameter(ptype4));
}
if (ptype5)
{
function->addParameter(TConstParameter(ptype5));
}
ASSERT(hasUnmangledBuiltInAtLevel(name, level));
insert(level, function);
}
}
void TSymbolTable::insertBuiltInOp(ESymbolLevel level,
TOperator op,
const TType *rvalue,
const TType *ptype1,
const TType *ptype2,
const TType *ptype3,
const TType *ptype4,
const TType *ptype5)
{
const char *name = GetOperatorString(op);
ASSERT(strlen(name) > 0);
insertUnmangledBuiltInName(name, level);
insertBuiltIn(level, op, "", rvalue, name, ptype1, ptype2, ptype3, ptype4, ptype5);
}
void TSymbolTable::insertBuiltInOp(ESymbolLevel level,
TOperator op,
const char *ext,
const TType *rvalue,
const TType *ptype1,
const TType *ptype2,
const TType *ptype3,
const TType *ptype4,
const TType *ptype5)
{
const char *name = GetOperatorString(op);
insertUnmangledBuiltInName(name, level);
insertBuiltIn(level, op, ext, rvalue, name, ptype1, ptype2, ptype3, ptype4, ptype5);
}
void TSymbolTable::insertBuiltInFunctionNoParameters(ESymbolLevel level,
TOperator op,
const TType *rvalue,
const char *name)
{
insertUnmangledBuiltInName(name, level);
insert(level, new TFunction(NewPoolTString(name), rvalue, op));
}
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. Some types don't have predefined default precision.
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;
}
void TSymbolTable::insertUnmangledBuiltInName(const char *name, ESymbolLevel level)
{
ASSERT(level >= 0 && level < static_cast<ESymbolLevel>(table.size()));
table[level]->insertUnmangledBuiltInName(std::string(name));
}
bool TSymbolTable::hasUnmangledBuiltInAtLevel(const char *name, ESymbolLevel level)
{
ASSERT(level >= 0 && level < static_cast<ESymbolLevel>(table.size()));
return table[level]->hasUnmangledBuiltIn(std::string(name));
}
bool TSymbolTable::hasUnmangledBuiltInForShaderVersion(const char *name, int shaderVersion)
{
ASSERT(static_cast<ESymbolLevel>(table.size()) > LAST_BUILTIN_LEVEL);
for (int level = LAST_BUILTIN_LEVEL; level >= 0; --level)
{
if (level == ESSL3_1_BUILTINS && shaderVersion != 310)
{
--level;
}
if (level == ESSL3_BUILTINS && shaderVersion < 300)
{
--level;
}
if (level == ESSL1_BUILTINS && shaderVersion != 100)
{
--level;
}
if (table[level]->hasUnmangledBuiltIn(name))
{
return true;
}
}
return false;
}
} // namespace sh