mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
142 lines
3.9 KiB
C++
142 lines
3.9 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Yul dialects for EVM.
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*/
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#include <libyul/backends/evm/EVMDialect.h>
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#include <libyul/AsmAnalysisInfo.h>
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#include <libyul/AsmData.h>
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#include <libyul/Object.h>
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#include <libyul/backends/evm/AbstractAssembly.h>
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#include <liblangutil/Exceptions.h>
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#include <libyul/Exceptions.h>
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#include <boost/range/adaptor/reversed.hpp>
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using namespace std;
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using namespace dev;
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using namespace yul;
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using namespace dev::solidity;
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EVMDialect::EVMDialect(AsmFlavour _flavour, bool _objectAccess):
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Dialect(_flavour), m_objectAccess(_objectAccess)
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{
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// The EVM instructions will be moved to builtins at some point.
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if (!m_objectAccess)
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return;
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addFunction("datasize", 1, 1, true, [this](
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FunctionCall const& _call,
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AbstractAssembly& _assembly,
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std::function<void()>
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) {
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yulAssert(m_currentObject, "No object available.");
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yulAssert(_call.arguments.size() == 1, "");
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Expression const& arg = _call.arguments.front();
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YulString dataName = boost::get<Literal>(arg).value;
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if (m_currentObject->name == dataName)
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_assembly.appendAssemblySize();
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else
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_assembly.appendDataSize(m_subIDs.at(dataName));
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});
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addFunction("dataoffset", 1, 1, true, [this](
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FunctionCall const& _call,
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AbstractAssembly& _assembly,
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std::function<void()>
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) {
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yulAssert(m_currentObject, "No object available.");
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yulAssert(_call.arguments.size() == 1, "");
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Expression const& arg = _call.arguments.front();
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YulString dataName = boost::get<Literal>(arg).value;
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if (m_currentObject->name == dataName)
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_assembly.appendConstant(0);
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else
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_assembly.appendDataOffset(m_subIDs.at(dataName));
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});
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addFunction("datacopy", 3, 0, false, [](
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FunctionCall const&,
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AbstractAssembly& _assembly,
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std::function<void()> _visitArguments
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) {
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_visitArguments();
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_assembly.appendInstruction(solidity::Instruction::CODECOPY);
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});
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}
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BuiltinFunctionForEVM const* EVMDialect::builtin(YulString _name) const
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{
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auto it = m_functions.find(_name);
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if (it != m_functions.end())
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return &it->second;
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else
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return nullptr;
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}
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shared_ptr<EVMDialect> EVMDialect::looseAssemblyForEVM()
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{
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return make_shared<EVMDialect>(AsmFlavour::Loose, false);
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}
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shared_ptr<EVMDialect> EVMDialect::strictAssemblyForEVM()
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{
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return make_shared<EVMDialect>(AsmFlavour::Strict, false);
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}
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shared_ptr<EVMDialect> EVMDialect::strictAssemblyForEVMObjects()
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{
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return make_shared<EVMDialect>(AsmFlavour::Strict, true);
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}
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shared_ptr<yul::EVMDialect> EVMDialect::yulForEVM()
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{
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return make_shared<EVMDialect>(AsmFlavour::Yul, false);
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}
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void EVMDialect::setSubIDs(map<YulString, AbstractAssembly::SubID> _subIDs)
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{
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yulAssert(m_objectAccess, "Sub IDs set with dialect that does not support object access.");
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m_subIDs = std::move(_subIDs);
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}
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void EVMDialect::setCurrentObject(Object const* _object)
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{
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yulAssert(m_objectAccess, "Current object set with dialect that does not support object access.");
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m_currentObject = _object;
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}
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void EVMDialect::addFunction(
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string _name,
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size_t _params,
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size_t _returns,
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bool _movable,
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std::function<void(FunctionCall const&, AbstractAssembly&, std::function<void()>)> _generateCode
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)
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{
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YulString name{std::move(_name)};
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BuiltinFunctionForEVM& f = m_functions[name];
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f.name = name;
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f.parameters.resize(_params);
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f.returns.resize(_returns);
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f.movable = _movable;
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f.generateCode = std::move(_generateCode);
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}
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