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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Common code generator for translating Julia / inline assembly to EVM and EVM1.5.
*/
#include <libjulia/backends/evm/AbstractAssembly.h>
#include <libsolidity/interface/Exceptions.h>
#include <libsolidity/inlineasm/AsmStack.h>
#include <libsolidity/inlineasm/AsmScope.h>
#include <boost/variant.hpp>
namespace dev
{
namespace solidity
{
namespace assembly
{
struct Literal;
struct Block;
struct Switch;
struct Label;
struct FunctionalInstruction;
struct Assignment;
struct VariableDeclaration;
struct Instruction;
struct Identifier;
struct StackAssignment;
struct FunctionDefinition;
struct FunctionCall;
struct AsmAnalysisInfo;
}
}
namespace julia
{
class CodeTransform: public boost::static_visitor<>
{
public:
/// Create the code transformer which appends assembly to _assembly as a side-effect
/// of its creation.
/// @param _identifierAccess used to resolve identifiers external to the inline assembly
CodeTransform(
solidity::ErrorList& _errors,
julia::AbstractAssembly& _assembly,
solidity::assembly::Block const& _block,
solidity::assembly::AsmAnalysisInfo& _analysisInfo,
ExternalIdentifierAccess const& _identifierAccess = ExternalIdentifierAccess()
): CodeTransform(_errors, _assembly, _block, _analysisInfo, _identifierAccess, _assembly.stackHeight())
{
}
private:
CodeTransform(
solidity::ErrorList& _errors,
julia::AbstractAssembly& _assembly,
solidity::assembly::Block const& _block,
solidity::assembly::AsmAnalysisInfo& _analysisInfo,
ExternalIdentifierAccess const& _identifierAccess,
int _initialStackHeight
);
public:
void operator()(solidity::assembly::Instruction const& _instruction);
void operator()(solidity::assembly::Literal const& _literal);
void operator()(solidity::assembly::Identifier const& _identifier);
void operator()(solidity::assembly::FunctionalInstruction const& _instr);
void operator()(solidity::assembly::FunctionCall const&);
void operator()(solidity::assembly::Label const& _label);
void operator()(solidity::assembly::StackAssignment const& _assignment);
void operator()(solidity::assembly::Assignment const& _assignment);
void operator()(solidity::assembly::VariableDeclaration const& _varDecl);
void operator()(solidity::assembly::Block const& _block);
void operator()(solidity::assembly::Switch const& _switch);
void operator()(solidity::assembly::FunctionDefinition const&);
private:
void generateAssignment(solidity::assembly::Identifier const& _variableName, SourceLocation const& _location);
/// Determines the stack height difference to the given variables. Automatically generates
/// errors if it is not yet in scope or the height difference is too large. Returns 0 on
/// errors and the (positive) stack height difference otherwise.
int variableHeightDiff(solidity::assembly::Scope::Variable const& _var, SourceLocation const& _location, bool _forSwap);
void expectDeposit(int _deposit, int _oldHeight);
void checkStackHeight(void const* _astElement);
/// Assigns the label's id to a value taken from eth::Assembly if it has not yet been set.
void assignLabelIdIfUnset(solidity::assembly::Scope::Label& _label);
solidity::ErrorList& m_errors;
julia::AbstractAssembly& m_assembly;
solidity::assembly::AsmAnalysisInfo& m_info;
solidity::assembly::Scope& m_scope;
ExternalIdentifierAccess m_identifierAccess;
int const m_initialStackHeight;
};
}
}
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