mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
63 lines
1.9 KiB
C++
63 lines
1.9 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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* Small useful snippets for the optimiser.
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*/
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#pragma once
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#include <libsolutil/Common.h>
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#include <libyul/ASTForward.h>
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#include <libyul/Dialect.h>
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#include <libyul/YulString.h>
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#include <libyul/optimiser/ASTWalker.h>
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#include <optional>
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namespace solidity::evmasm
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{
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enum class Instruction: uint8_t;
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}
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namespace solidity::yul
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{
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/// Removes statements that are just empty blocks (non-recursive).
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/// If this is run on the outermost block, the FunctionGrouper should be run afterwards to keep
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/// the canonical form.
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void removeEmptyBlocks(Block& _block);
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/// Returns true if a given literal can not be used as an identifier.
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/// This includes Yul keywords and builtins of the given dialect.
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bool isRestrictedIdentifier(Dialect const& _dialect, YulString const& _identifier);
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/// Helper function that returns the instruction, if the `_name` is a BuiltinFunction
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std::optional<evmasm::Instruction> toEVMInstruction(Dialect const& _dialect, YulString const& _name);
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class StatementRemover: public ASTModifier
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{
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public:
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explicit StatementRemover(std::set<Statement const*> const& _toRemove): m_toRemove(_toRemove) {}
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void operator()(Block& _block) override;
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private:
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std::set<Statement const*> const& m_toRemove;
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};
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}
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