mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
150 lines
3.9 KiB
C++
150 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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// SPDX-License-Identifier: GPL-3.0
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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/AST.h>
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#include <libyul/Exceptions.h>
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#include <libevmasm/Instruction.h>
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#include <range/v3/view/iota.hpp>
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using namespace std;
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using namespace solidity;
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using namespace solidity::yul;
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using namespace solidity::util;
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using namespace solidity::langutil;
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void NoOutputAssembly::appendInstruction(evmasm::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(evmasm::pushInstruction(1));
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}
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void NoOutputAssembly::appendLabel(LabelID)
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{
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appendInstruction(evmasm::Instruction::JUMPDEST);
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}
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void NoOutputAssembly::appendLabelReference(LabelID)
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{
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appendInstruction(evmasm::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&, size_t, size_t, optional<size_t>)
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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::appendVerbatim(bytes, size_t _arguments, size_t _returnVariables)
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{
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m_stackHeight += static_cast<int>(_returnVariables - _arguments);
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}
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void NoOutputAssembly::appendJump(int _stackDiffAfter, JumpType)
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{
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appendInstruction(evmasm::Instruction::JUMP);
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m_stackHeight += _stackDiffAfter;
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}
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void NoOutputAssembly::appendJumpTo(LabelID _labelId, int _stackDiffAfter, JumpType _jumpType)
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{
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appendLabelReference(_labelId);
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appendJump(_stackDiffAfter, _jumpType);
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}
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void NoOutputAssembly::appendJumpToIf(LabelID _labelId, JumpType)
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{
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appendLabelReference(_labelId);
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appendInstruction(evmasm::Instruction::JUMPI);
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}
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void NoOutputAssembly::appendAssemblySize()
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{
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appendInstruction(evmasm::Instruction::PUSH1);
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}
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pair<shared_ptr<AbstractAssembly>, AbstractAssembly::SubID> NoOutputAssembly::createSubAssembly(std::string)
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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(std::vector<AbstractAssembly::SubID> const&)
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{
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appendInstruction(evmasm::Instruction::PUSH1);
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}
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void NoOutputAssembly::appendDataSize(std::vector<AbstractAssembly::SubID> const&)
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{
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appendInstruction(evmasm::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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void NoOutputAssembly::appendImmutable(std::string const&)
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{
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yulAssert(false, "loadimmutable not implemented.");
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}
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void NoOutputAssembly::appendImmutableAssignment(std::string const&)
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{
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yulAssert(false, "setimmutable not implemented.");
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}
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NoOutputEVMDialect::NoOutputEVMDialect(EVMDialect const& _copyFrom):
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EVMDialect(_copyFrom.evmVersion(), _copyFrom.providesObjectAccess())
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{
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for (auto& fun: m_functions)
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{
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size_t returns = fun.second.returns.size();
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fun.second.generateCode = [=](FunctionCall const& _call, AbstractAssembly& _assembly, BuiltinContext&)
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{
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for (size_t i: ranges::views::iota(0u, _call.arguments.size()))
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if (!fun.second.literalArgument(i))
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_assembly.appendInstruction(evmasm::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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