mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
124 lines
3.4 KiB
C++
124 lines
3.4 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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/**
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* Module providing metrics for the EVM optimizer.
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*/
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#include <libyul/backends/evm/EVMMetrics.h>
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#include <libyul/AsmData.h>
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#include <libyul/Exceptions.h>
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#include <libyul/Utilities.h>
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#include <libyul/backends/evm/EVMDialect.h>
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#include <libevmasm/Instruction.h>
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#include <libevmasm/GasMeter.h>
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#include <libdevcore/Visitor.h>
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#include <libdevcore/CommonData.h>
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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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size_t GasMeter::costs(Expression const& _expression) const
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{
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return combineCosts(GasMeterVisitor::costs(_expression, m_dialect, m_isCreation));
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}
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size_t GasMeter::instructionCosts(eth::Instruction _instruction) const
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{
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return combineCosts(GasMeterVisitor::instructionCosts(_instruction, m_dialect, m_isCreation));
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}
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size_t GasMeter::combineCosts(std::pair<size_t, size_t> _costs) const
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{
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return _costs.first * m_runs + _costs.second;
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}
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pair<size_t, size_t> GasMeterVisitor::costs(
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Expression const& _expression,
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EVMDialect const& _dialect,
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bool _isCreation
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)
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{
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GasMeterVisitor gmv(_dialect, _isCreation);
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gmv.visit(_expression);
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return {gmv.m_runGas, gmv.m_dataGas};
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}
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pair<size_t, size_t> GasMeterVisitor::instructionCosts(
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dev::eth::Instruction _instruction,
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EVMDialect const& _dialect,
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bool _isCreation
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)
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{
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GasMeterVisitor gmv(_dialect, _isCreation);
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gmv.instructionCostsInternal(_instruction);
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return {gmv.m_runGas, gmv.m_dataGas};
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}
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void GasMeterVisitor::operator()(FunctionCall const& _funCall)
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{
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ASTWalker::operator()(_funCall);
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if (BuiltinFunctionForEVM const* f = m_dialect.builtin(_funCall.functionName.name))
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if (f->instruction)
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{
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instructionCostsInternal(*f->instruction);
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return;
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}
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yulAssert(false, "Functions not implemented.");
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}
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void GasMeterVisitor::operator()(FunctionalInstruction const& _fun)
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{
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ASTWalker::operator()(_fun);
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instructionCostsInternal(_fun.instruction);
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}
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void GasMeterVisitor::operator()(Literal const& _lit)
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{
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m_runGas += dev::eth::GasMeter::runGas(dev::eth::Instruction::PUSH1);
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m_dataGas +=
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singleByteDataGas() +
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size_t(dev::eth::GasMeter::dataGas(dev::toCompactBigEndian(valueOfLiteral(_lit), 1), m_isCreation));
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}
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void GasMeterVisitor::operator()(Identifier const&)
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{
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m_runGas += dev::eth::GasMeter::runGas(dev::eth::Instruction::DUP1);
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m_dataGas += singleByteDataGas();
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}
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size_t GasMeterVisitor::singleByteDataGas() const
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{
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if (m_isCreation)
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return dev::eth::GasCosts::txDataNonZeroGas;
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else
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return dev::eth::GasCosts::createDataGas;
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}
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void GasMeterVisitor::instructionCostsInternal(dev::eth::Instruction _instruction)
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{
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if (_instruction == eth::Instruction::EXP)
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m_runGas += dev::eth::GasCosts::expGas + dev::eth::GasCosts::expByteGas(m_dialect.evmVersion());
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else
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m_runGas += dev::eth::GasMeter::runGas(_instruction);
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m_dataGas += singleByteDataGas();
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}
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