mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
162 lines
4.1 KiB
C++
162 lines
4.1 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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* Assembly interface that ignores everything. Can be used as a backend for a compilation dry-run.
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*/
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#include <libyul/backends/evm/NoOutputAssembly.h>
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#include <libyul/Exceptions.h>
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#include <libevmasm/Instruction.h>
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using namespace std;
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using namespace dev;
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using namespace langutil;
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using namespace yul;
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void NoOutputAssembly::appendInstruction(dev::eth::Instruction _instr)
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{
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m_stackHeight += instructionInfo(_instr).ret - instructionInfo(_instr).args;
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}
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void NoOutputAssembly::appendConstant(u256 const&)
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{
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appendInstruction(dev::eth::pushInstruction(1));
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}
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void NoOutputAssembly::appendLabel(LabelID)
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{
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appendInstruction(dev::eth::Instruction::JUMPDEST);
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}
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void NoOutputAssembly::appendLabelReference(LabelID)
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{
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yulAssert(!m_evm15, "Cannot use plain label references in EMV1.5 mode.");
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appendInstruction(dev::eth::pushInstruction(1));
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}
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NoOutputAssembly::LabelID NoOutputAssembly::newLabelId()
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{
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return 1;
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}
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AbstractAssembly::LabelID NoOutputAssembly::namedLabel(string const&)
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{
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return 1;
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}
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void NoOutputAssembly::appendLinkerSymbol(string const&)
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{
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yulAssert(false, "Linker symbols not yet implemented.");
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}
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void NoOutputAssembly::appendJump(int _stackDiffAfter)
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{
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yulAssert(!m_evm15, "Plain JUMP used for EVM 1.5");
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appendInstruction(dev::eth::Instruction::JUMP);
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m_stackHeight += _stackDiffAfter;
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}
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void NoOutputAssembly::appendJumpTo(LabelID _labelId, int _stackDiffAfter)
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{
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if (m_evm15)
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m_stackHeight += _stackDiffAfter;
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else
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{
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appendLabelReference(_labelId);
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appendJump(_stackDiffAfter);
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}
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}
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void NoOutputAssembly::appendJumpToIf(LabelID _labelId)
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{
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if (m_evm15)
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m_stackHeight--;
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else
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{
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appendLabelReference(_labelId);
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appendInstruction(dev::eth::Instruction::JUMPI);
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}
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}
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void NoOutputAssembly::appendBeginsub(LabelID, int _arguments)
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{
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yulAssert(m_evm15, "BEGINSUB used for EVM 1.0");
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yulAssert(_arguments >= 0, "");
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m_stackHeight += _arguments;
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}
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void NoOutputAssembly::appendJumpsub(LabelID, int _arguments, int _returns)
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{
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yulAssert(m_evm15, "JUMPSUB used for EVM 1.0");
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yulAssert(_arguments >= 0 && _returns >= 0, "");
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m_stackHeight += _returns - _arguments;
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}
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void NoOutputAssembly::appendReturnsub(int _returns, int _stackDiffAfter)
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{
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yulAssert(m_evm15, "RETURNSUB used for EVM 1.0");
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yulAssert(_returns >= 0, "");
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m_stackHeight += _stackDiffAfter - _returns;
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}
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void NoOutputAssembly::appendAssemblySize()
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{
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appendInstruction(dev::eth::Instruction::PUSH1);
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}
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pair<shared_ptr<AbstractAssembly>, AbstractAssembly::SubID> NoOutputAssembly::createSubAssembly()
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{
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yulAssert(false, "Sub assemblies not implemented.");
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return {};
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}
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void NoOutputAssembly::appendDataOffset(AbstractAssembly::SubID)
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{
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appendInstruction(dev::eth::Instruction::PUSH1);
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}
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void NoOutputAssembly::appendDataSize(AbstractAssembly::SubID)
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{
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appendInstruction(dev::eth::Instruction::PUSH1);
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}
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AbstractAssembly::SubID NoOutputAssembly::appendData(bytes const&)
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{
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return 1;
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}
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NoOutputEVMDialect::NoOutputEVMDialect(EVMDialect const& _copyFrom):
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EVMDialect(_copyFrom.flavour, _copyFrom.providesObjectAccess(), _copyFrom.evmVersion())
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{
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for (auto& fun: m_functions)
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{
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size_t parameters = fun.second.parameters.size();
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size_t returns = fun.second.returns.size();
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fun.second.generateCode = [=](FunctionCall const&, AbstractAssembly& _assembly, BuiltinContext&, std::function<void()> _visitArguments)
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{
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_visitArguments();
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for (size_t i = 0; i < parameters; i++)
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_assembly.appendInstruction(dev::eth::Instruction::POP);
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for (size_t i = 0; i < returns; i++)
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_assembly.appendConstant(u256(0));
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};
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}
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}
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