mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
116 lines
4.4 KiB
C++
116 lines
4.4 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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// SPDX-License-Identifier: GPL-3.0
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/**
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* Common code generator for translating Yul / inline assembly to Wasm.
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*/
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#pragma once
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#include <libyul/backends/wasm/WasmAST.h>
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#include <libyul/ASTForward.h>
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#include <libyul/Dialect.h>
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#include <libyul/optimiser/NameDispenser.h>
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#include <libyul/optimiser/TypeInfo.h>
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#include <libsolutil/Common.h>
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#include <libsolutil/Numeric.h>
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#include <stack>
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#include <map>
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namespace solidity::yul
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{
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struct AsmAnalysisInfo;
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class WasmCodeTransform
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{
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public:
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static wasm::Module run(Dialect const& _dialect, yul::Block const& _ast);
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public:
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wasm::Expression operator()(yul::Literal const& _literal);
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wasm::Expression operator()(yul::Identifier const& _identifier);
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wasm::Expression operator()(yul::FunctionCall const&);
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wasm::Expression operator()(yul::ExpressionStatement const& _statement);
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wasm::Expression operator()(yul::Assignment const& _assignment);
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wasm::Expression operator()(yul::VariableDeclaration const& _varDecl);
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wasm::Expression operator()(yul::If const& _if);
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wasm::Expression operator()(yul::Switch const& _switch);
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wasm::Expression operator()(yul::FunctionDefinition const&);
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wasm::Expression operator()(yul::ForLoop const&);
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wasm::Expression operator()(yul::Break const&);
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wasm::Expression operator()(yul::Continue const&);
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wasm::Expression operator()(yul::Leave const&);
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wasm::Expression operator()(yul::Block const& _block);
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private:
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WasmCodeTransform(
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Dialect const& _dialect,
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Block const& _ast,
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TypeInfo& _typeInfo
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):
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m_dialect(_dialect),
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m_nameDispenser(_dialect, _ast),
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m_typeInfo(_typeInfo)
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{}
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std::unique_ptr<wasm::Expression> visit(yul::Expression const& _expression);
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wasm::Expression visitReturnByValue(yul::Expression const& _expression);
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std::vector<wasm::Expression> visit(std::vector<yul::Expression> const& _expressions);
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wasm::Expression visit(yul::Statement const& _statement);
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std::vector<wasm::Expression> visit(std::vector<yul::Statement> const& _statements);
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/// Returns an assignment or a block containing multiple assignments.
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/// @param _variableNames the names of the variables to assign to
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/// @param _firstValue the value to be assigned to the first variable. If there
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/// is more than one variable, the values are taken from m_globalVariables.
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wasm::Expression generateMultiAssignment(
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std::vector<std::string> _variableNames,
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std::unique_ptr<wasm::Expression> _firstValue
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);
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wasm::FunctionDefinition translateFunction(yul::FunctionDefinition const& _funDef);
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/// Imports an external function into the current module.
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/// @param _builtin _builtin the builtin that will be imported into the current module.
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/// @param _module _module the module name under which the external function can be found.
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/// @param _externalName the name of the external function within the module _module.
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/// @param _internalName the name of the internal function under that the external function is accessible.
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void importBuiltinFunction(BuiltinFunction const* _builtin, std::string const& _module, std::string const& _externalName, std::string const& _internalName);
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std::string newLabel();
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/// Selects a subset of global variables matching specified sequence of variable types.
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/// Defines more global variables of a given type if there's not enough.
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std::vector<size_t> allocateGlobals(std::vector<wasm::Type> const& _typesForGlobals);
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static wasm::Type translatedType(yul::Type _yulType);
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static wasm::Literal makeLiteral(wasm::Type _type, u256 _value);
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Dialect const& m_dialect;
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NameDispenser m_nameDispenser;
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std::vector<wasm::VariableDeclaration> m_localVariables;
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std::vector<wasm::GlobalVariableDeclaration> m_globalVariables;
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std::map<YulString, wasm::FunctionImport> m_functionsToImport;
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std::string m_functionBodyLabel;
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std::stack<std::pair<std::string, std::string>> m_breakContinueLabelNames;
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TypeInfo& m_typeInfo;
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};
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}
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