mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
61 lines
2.3 KiB
C++
61 lines
2.3 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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#pragma once
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#include <libyul/optimiser/Metrics.h>
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#include <libyul/optimiser/NameDispenser.h>
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#include <libyul/AST.h>
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namespace solidity::yul::unusedFunctionsCommon
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{
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/// Returns true if applying UnusedFunctionParameterPruner is not helpful or redundant because the
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/// inliner will be able to handle it anyway.
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inline bool tooSimpleToBePruned(FunctionDefinition const& _f)
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{
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return _f.body.statements.size() <= 1 && CodeSize::codeSize(_f.body) <= 1;
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}
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/// Given a function definition `_original`, this function returns a 'linking' function that calls
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/// `_originalFunctionName` (with reduced parameters and return values).
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///
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/// The parameter `_usedParametersAndReturnVariables` is a pair of boolean-vectors. Its `.first`
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/// corresponds to function parameters and its `.second` corresponds to function return-variables. A
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/// false value at index `i` means that the corresponding function parameter / return-variable at
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/// index `i` is unused.
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///
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/// Example:
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///
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/// Let `_original` be the function `function f_1() -> y { }`. (In practice, this function usually cannot
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/// be inlined and has parameters / return-variables that are unused.)
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/// Let `_usedParametersAndReturnVariables` be `({}, {false})`
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/// Let `_originalFunctionName` be `f`.
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/// Let `_linkingFunctionName` be `f_1`.
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///
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/// Then the returned linking function would be `function f_1() -> y_1 { f() }`
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FunctionDefinition createLinkingFunction(
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FunctionDefinition const& _original,
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std::pair<std::vector<bool>, std::vector<bool>> const& _usedParametersAndReturns,
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YulString const& _originalFunctionName,
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YulString const& _linkingFunctionName,
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NameDispenser& _nameDispenser
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);
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}
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