mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
90 lines
2.8 KiB
C++
90 lines
2.8 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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#pragma once
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#include <libyul/Dialect.h>
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#include <libyul/backends/evm/AbstractAssembly.h>
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#include <liblangutil/EVMVersion.h>
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#include <map>
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namespace yul
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{
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class YulString;
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using Type = YulString;
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struct FunctionCall;
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struct Object;
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/**
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* Context used during code generation.
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*/
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struct BuiltinContext
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{
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Object const* currentObject = nullptr;
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/// Mapping from named objects to abstract assembly sub IDs.
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std::map<YulString, AbstractAssembly::SubID> subIDs;
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};
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struct BuiltinFunctionForEVM: BuiltinFunction
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{
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boost::optional<dev::eth::Instruction> instruction;
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/// Function to generate code for the given function call and append it to the abstract
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/// assembly. The fourth parameter is called to visit (and generate code for) the arguments
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/// from right to left.
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std::function<void(FunctionCall const&, AbstractAssembly&, BuiltinContext&, std::function<void()>)> generateCode;
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};
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/**
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* Yul dialect for EVM as a backend.
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* The main difference is that the builtin functions take an AbstractAssembly for the
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* code generation.
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*/
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struct EVMDialect: public Dialect
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{
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/// Constructor, should only be used internally. Use the factory functions below.
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EVMDialect(AsmFlavour _flavour, bool _objectAccess, langutil::EVMVersion _evmVersion);
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/// @returns the builtin function of the given name or a nullptr if it is not a builtin function.
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BuiltinFunctionForEVM const* builtin(YulString _name) const override;
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BuiltinFunctionForEVM const* discardFunction() const override { return builtin("pop"_yulstring); }
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BuiltinFunctionForEVM const* equalityFunction() const override { return builtin("eq"_yulstring); }
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static EVMDialect const& looseAssemblyForEVM(langutil::EVMVersion _version);
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static EVMDialect const& strictAssemblyForEVM(langutil::EVMVersion _version);
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static EVMDialect const& strictAssemblyForEVMObjects(langutil::EVMVersion _version);
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static EVMDialect const& yulForEVM(langutil::EVMVersion _version);
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langutil::EVMVersion evmVersion() const { return m_evmVersion; }
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bool providesObjectAccess() const { return m_objectAccess; }
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protected:
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bool const m_objectAccess;
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langutil::EVMVersion const m_evmVersion;
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std::map<YulString, BuiltinFunctionForEVM> m_functions;
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};
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}
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