solidity/libyul/backends/evm/EVMObjectCompiler.cpp

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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/>.
*/
// SPDX-License-Identifier: GPL-3.0
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/**
* Compiler that transforms Yul Objects to EVM bytecode objects.
*/
#include <libyul/backends/evm/EVMObjectCompiler.h>
#include <libyul/backends/evm/EVMCodeTransform.h>
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#include <libyul/backends/evm/EVMDialect.h>
#include <libyul/backends/evm/OptimizedEVMCodeTransform.h>
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#include <libyul/optimiser/FunctionCallFinder.h>
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#include <libyul/Object.h>
#include <libyul/Exceptions.h>
#include <boost/algorithm/string.hpp>
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using namespace solidity::yul;
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using namespace std;
void EVMObjectCompiler::compile(
Object& _object,
AbstractAssembly& _assembly,
EVMDialect const& _dialect,
bool _optimize,
std::optional<uint8_t> _eofVersion
)
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{
EVMObjectCompiler compiler(_assembly, _dialect, _eofVersion);
compiler.run(_object, _optimize);
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}
void EVMObjectCompiler::run(Object& _object, bool _optimize)
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{
BuiltinContext context;
context.currentObject = &_object;
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for (auto const& subNode: _object.subObjects)
if (auto* subObject = dynamic_cast<Object*>(subNode.get()))
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{
bool isCreation = !boost::ends_with(subObject->name.str(), "_deployed");
auto subAssemblyAndID = m_assembly.createSubAssembly(isCreation, subObject->name.str());
context.subIDs[subObject->name] = subAssemblyAndID.second;
subObject->subId = subAssemblyAndID.second;
compile(*subObject, *subAssemblyAndID.first, m_dialect, _optimize, m_eofVersion);
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}
else
{
Data const& data = dynamic_cast<Data const&>(*subNode);
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// Special handling of metadata.
if (data.name.str() == Object::metadataName())
m_assembly.appendToAuxiliaryData(data.data);
else
context.subIDs[data.name] = m_assembly.appendData(data.data);
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}
yulAssert(_object.analysisInfo, "No analysis info.");
yulAssert(_object.code, "No code.");
if (m_eofVersion.has_value())
yulAssert(
_optimize && (m_dialect.evmVersion() == langutil::EVMVersion()),
"Experimental EOF support is only available for optimized via-IR compilation and the most recent EVM version."
);
if (_optimize && m_dialect.evmVersion().canOverchargeGasForCall())
{
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auto stackErrors = OptimizedEVMCodeTransform::run(
m_assembly,
*_object.analysisInfo,
*_object.code,
m_dialect,
context,
OptimizedEVMCodeTransform::UseNamedLabels::ForFirstFunctionOfEachName
);
if (!stackErrors.empty())
{
vector<FunctionCall*> memoryGuardCalls = FunctionCallFinder::run(
*_object.code,
"memoryguard"_yulstring
);
auto stackError = stackErrors.front();
string msg = stackError.comment() ? *stackError.comment() : "";
if (memoryGuardCalls.empty())
msg += "\nNo memoryguard was present. "
"Consider using memory-safe assembly only and annotating it via "
"'assembly (\"memory-safe\") { ... }'.";
else
msg += "\nmemoryguard was present.";
stackError << util::errinfo_comment(msg);
BOOST_THROW_EXCEPTION(stackError);
}
}
else
{
// We do not catch and re-throw the stack too deep exception here because it is a YulException,
// which should be native to this part of the code.
CodeTransform transform{
m_assembly,
*_object.analysisInfo,
*_object.code,
m_dialect,
context,
_optimize,
{},
CodeTransform::UseNamedLabels::ForFirstFunctionOfEachName
};
transform(*_object.code);
if (!transform.stackErrors().empty())
BOOST_THROW_EXCEPTION(transform.stackErrors().front());
}
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}