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//
// Copyright 2017 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.cpp: Symbols representing variables, functions, structures and interface blocks.
//
#if defined(_MSC_VER)
# pragma warning(disable : 4718)
#endif
#include "compiler/translator/Symbol.h"
#include "compiler/translator/ImmutableStringBuilder.h"
#include "compiler/translator/SymbolTable.h"
namespace sh
{
namespace
{
constexpr const ImmutableString kMainName("main");
constexpr const ImmutableString kImageLoadName("imageLoad");
constexpr const ImmutableString kImageStoreName("imageStore");
constexpr const ImmutableString kImageSizeName("imageSize");
constexpr const ImmutableString kImageAtomicExchangeName("imageAtomicExchange");
constexpr const ImmutableString kAtomicCounterName("atomicCounter");
static const char kFunctionMangledNameSeparator = '(';
} // anonymous namespace
TSymbol::TSymbol(TSymbolTable *symbolTable,
const ImmutableString &name,
SymbolType symbolType,
SymbolClass symbolClass,
TExtension extension)
: mName(name),
mUniqueId(symbolTable->nextUniqueId()),
mExtensions(
std::array<TExtension, 3u>{{extension, TExtension::UNDEFINED, TExtension::UNDEFINED}}),
mSymbolType(symbolType),
mSymbolClass(symbolClass)
{
ASSERT(mSymbolType == SymbolType::BuiltIn || extension == TExtension::UNDEFINED);
ASSERT(mName != "" || mSymbolType == SymbolType::AngleInternal ||
mSymbolType == SymbolType::Empty);
}
TSymbol::TSymbol(TSymbolTable *symbolTable,
const ImmutableString &name,
SymbolType symbolType,
SymbolClass symbolClass,
const std::array<TExtension, 3u> &extensions)
: mName(name),
mUniqueId(symbolTable->nextUniqueId()),
mExtensions(extensions),
mSymbolType(symbolType),
mSymbolClass(symbolClass)
{
ASSERT(mSymbolType == SymbolType::BuiltIn || extensions[0] == TExtension::UNDEFINED);
ASSERT(mName != "" || mSymbolType == SymbolType::AngleInternal ||
mSymbolType == SymbolType::Empty);
}
ImmutableString TSymbol::name() const
{
if (!mName.empty())
{
return mName;
}
// This can be called for nameless function parameters in HLSL.
ASSERT(mSymbolType == SymbolType::AngleInternal ||
(mSymbolType == SymbolType::Empty && isVariable()));
int uniqueId = mUniqueId.get();
ImmutableStringBuilder symbolNameOut(sizeof(uniqueId) * 2u + 1u);
symbolNameOut << 's';
symbolNameOut.appendHex(mUniqueId.get());
return symbolNameOut;
}
ImmutableString TSymbol::getMangledName() const
{
if (mSymbolClass == SymbolClass::Function)
{
// We do this instead of using proper virtual functions so that we can better support
// constexpr symbols.
return static_cast<const TFunction *>(this)->getFunctionMangledName();
}
ASSERT(mSymbolType != SymbolType::Empty);
return name();
}
TVariable::TVariable(TSymbolTable *symbolTable,
const ImmutableString &name,
const TType *type,
SymbolType symbolType,
TExtension extension)
: TSymbol(symbolTable, name, symbolType, SymbolClass::Variable, extension),
mType(type),
unionArray(nullptr)
{
ASSERT(mType);
ASSERT(name.empty() || symbolType != SymbolType::Empty);
}
TVariable::TVariable(TSymbolTable *symbolTable,
const ImmutableString &name,
const TType *type,
SymbolType symbolType,
const std::array<TExtension, 3u> &extensions)
: TSymbol(symbolTable, name, symbolType, SymbolClass::Variable, extensions),
mType(type),
unionArray(nullptr)
{
ASSERT(mType);
ASSERT(name.empty() || symbolType != SymbolType::Empty);
}
TStructure::TStructure(TSymbolTable *symbolTable,
const ImmutableString &name,
const TFieldList *fields,
SymbolType symbolType)
: TSymbol(symbolTable, name, symbolType, SymbolClass::Struct), TFieldListCollection(fields)
{}
void TStructure::createSamplerSymbols(const char *namePrefix,
const TString &apiNamePrefix,
TVector<const TVariable *> *outputSymbols,
TMap<const TVariable *, TString> *outputSymbolsToAPINames,
TSymbolTable *symbolTable) const
{
ASSERT(containsSamplers());
for (const auto *field : *mFields)
{
const TType *fieldType = field->type();
if (IsSampler(fieldType->getBasicType()) || fieldType->isStructureContainingSamplers())
{
std::stringstream fieldName = sh::InitializeStream<std::stringstream>();
fieldName << namePrefix << "_" << field->name();
TString fieldApiName = apiNamePrefix + ".";
fieldApiName += field->name().data();
fieldType->createSamplerSymbols(ImmutableString(fieldName.str()), fieldApiName,
outputSymbols, outputSymbolsToAPINames, symbolTable);
}
}
}
void TStructure::setName(const ImmutableString &name)
{
ImmutableString *mutableName = const_cast<ImmutableString *>(&mName);
*mutableName = name;
}
TInterfaceBlock::TInterfaceBlock(TSymbolTable *symbolTable,
const ImmutableString &name,
const TFieldList *fields,
const TLayoutQualifier &layoutQualifier,
SymbolType symbolType,
TExtension extension)
: TSymbol(symbolTable, name, symbolType, SymbolClass::InterfaceBlock, extension),
TFieldListCollection(fields),
mBlockStorage(layoutQualifier.blockStorage),
mBinding(layoutQualifier.binding)
{
ASSERT(name != nullptr);
}
TInterfaceBlock::TInterfaceBlock(TSymbolTable *symbolTable,
const ImmutableString &name,
const TFieldList *fields,
const TLayoutQualifier &layoutQualifier,
SymbolType symbolType,
const std::array<TExtension, 3u> &extensions)
: TSymbol(symbolTable, name, symbolType, SymbolClass::InterfaceBlock, extensions),
TFieldListCollection(fields),
mBlockStorage(layoutQualifier.blockStorage),
mBinding(layoutQualifier.binding)
{
ASSERT(name != nullptr);
}
TFunction::TFunction(TSymbolTable *symbolTable,
const ImmutableString &name,
SymbolType symbolType,
const TType *retType,
bool knownToNotHaveSideEffects)
: TSymbol(symbolTable, name, symbolType, SymbolClass::Function, TExtension::UNDEFINED),
mParametersVector(new TParamVector()),
mParameters(nullptr),
returnType(retType),
mMangledName(""),
mParamCount(0u),
mOp(EOpNull),
defined(false),
mHasPrototypeDeclaration(false),
mKnownToNotHaveSideEffects(knownToNotHaveSideEffects),
mHasVoidParameter(false)
{
// Functions with an empty name are not allowed.
ASSERT(symbolType != SymbolType::Empty);
ASSERT(name != nullptr || symbolType == SymbolType::AngleInternal);
}
void TFunction::addParameter(const TVariable *p)
{
ASSERT(mParametersVector);
mParametersVector->push_back(p);
mParameters = mParametersVector->data();
mParamCount = mParametersVector->size();
mMangledName = kEmptyImmutableString;
}
void TFunction::shareParameters(const TFunction ¶metersSource)
{
mParametersVector = nullptr;
mParameters = parametersSource.mParameters;
mParamCount = parametersSource.mParamCount;
ASSERT(parametersSource.name() == name());
mMangledName = parametersSource.mMangledName;
}
ImmutableString TFunction::buildMangledName() const
{
ImmutableString name = this->name();
std::string newName(name.data(), name.length());
newName += kFunctionMangledNameSeparator;
for (size_t i = 0u; i < mParamCount; ++i)
{
newName += mParameters[i]->getType().getMangledName();
}
return ImmutableString(newName);
}
bool TFunction::isMain() const
{
return symbolType() == SymbolType::UserDefined && name() == kMainName;
}
bool TFunction::isImageFunction() const
{
return symbolType() == SymbolType::BuiltIn &&
(name() == kImageSizeName || name() == kImageLoadName || name() == kImageStoreName ||
name() == kImageAtomicExchangeName);
}
bool TFunction::isAtomicCounterFunction() const
{
return SymbolType() == SymbolType::BuiltIn && name().beginsWith(kAtomicCounterName);
}
} // namespace sh
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