mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
120 lines
3.9 KiB
C++
120 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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* Common code generator for translating Julia / inline assembly to EVM and EVM1.5.
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*/
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#include <libjulia/backends/evm/AbstractAssembly.h>
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#include <libsolidity/interface/Exceptions.h>
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#include <libsolidity/inlineasm/AsmStack.h>
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#include <libsolidity/inlineasm/AsmScope.h>
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#include <boost/variant.hpp>
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namespace dev
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{
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namespace solidity
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{
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namespace assembly
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{
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struct Literal;
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struct Block;
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struct Switch;
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struct Label;
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struct FunctionalInstruction;
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struct Assignment;
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struct VariableDeclaration;
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struct Instruction;
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struct Identifier;
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struct StackAssignment;
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struct FunctionDefinition;
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struct FunctionCall;
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struct AsmAnalysisInfo;
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}
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}
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namespace julia
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{
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class CodeTransform: public boost::static_visitor<>
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{
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public:
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/// Create the code transformer which appends assembly to _assembly as a side-effect
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/// of its creation.
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/// @param _identifierAccess used to resolve identifiers external to the inline assembly
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CodeTransform(
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solidity::ErrorList& _errors,
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julia::AbstractAssembly& _assembly,
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solidity::assembly::Block const& _block,
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solidity::assembly::AsmAnalysisInfo& _analysisInfo,
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ExternalIdentifierAccess const& _identifierAccess = ExternalIdentifierAccess()
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): CodeTransform(_errors, _assembly, _block, _analysisInfo, _identifierAccess, _assembly.stackHeight())
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{
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}
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private:
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CodeTransform(
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solidity::ErrorList& _errors,
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julia::AbstractAssembly& _assembly,
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solidity::assembly::Block const& _block,
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solidity::assembly::AsmAnalysisInfo& _analysisInfo,
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ExternalIdentifierAccess const& _identifierAccess,
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int _initialStackHeight
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);
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public:
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void operator()(solidity::assembly::Instruction const& _instruction);
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void operator()(solidity::assembly::Literal const& _literal);
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void operator()(solidity::assembly::Identifier const& _identifier);
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void operator()(solidity::assembly::FunctionalInstruction const& _instr);
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void operator()(solidity::assembly::FunctionCall const&);
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void operator()(solidity::assembly::Label const& _label);
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void operator()(solidity::assembly::StackAssignment const& _assignment);
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void operator()(solidity::assembly::Assignment const& _assignment);
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void operator()(solidity::assembly::VariableDeclaration const& _varDecl);
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void operator()(solidity::assembly::Block const& _block);
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void operator()(solidity::assembly::Switch const& _switch);
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void operator()(solidity::assembly::FunctionDefinition const&);
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private:
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void generateAssignment(solidity::assembly::Identifier const& _variableName, SourceLocation const& _location);
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/// Determines the stack height difference to the given variables. Automatically generates
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/// errors if it is not yet in scope or the height difference is too large. Returns 0 on
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/// errors and the (positive) stack height difference otherwise.
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int variableHeightDiff(solidity::assembly::Scope::Variable const& _var, SourceLocation const& _location, bool _forSwap);
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void expectDeposit(int _deposit, int _oldHeight);
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void checkStackHeight(void const* _astElement);
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/// Assigns the label's id to a value taken from eth::Assembly if it has not yet been set.
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void assignLabelIdIfUnset(solidity::assembly::Scope::Label& _label);
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solidity::ErrorList& m_errors;
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julia::AbstractAssembly& m_assembly;
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solidity::assembly::AsmAnalysisInfo& m_info;
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solidity::assembly::Scope& m_scope;
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ExternalIdentifierAccess m_identifierAccess;
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int const m_initialStackHeight;
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};
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}
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}
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