mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
102 lines
3.1 KiB
C++
102 lines
3.1 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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* Unit tests for stack shuffling.
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*/
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#include <test/Common.h>
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#include <libyul/backends/evm/StackHelpers.h>
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#include <libyul/backends/evm/OptimizedEVMCodeTransform.h>
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#include <boost/test/unit_test.hpp>
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using namespace std;
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namespace solidity::yul::test
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{
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namespace
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{
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bool triggersStackTooDeep(Stack _source, Stack const& _target)
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{
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bool result = false;
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createStackLayout(_source, _target, [&](unsigned _i) {
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if (_i > 16)
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result = true;
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}, [&](StackSlot const& _slot) {
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if (canBeFreelyGenerated(_slot))
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return;
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if (auto depth = util::findOffset(_source | ranges::views::reverse, _slot); depth && *depth >= 16)
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if (*depth >= 16)
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result = true;
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}, [&]() {});
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return result;
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}
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}
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BOOST_AUTO_TEST_SUITE(StackHelpers)
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BOOST_AUTO_TEST_CASE(avoid_deep_dup)
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{
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vector<Scope::Variable> variableContainer;
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for (size_t i = 0; i < 15; ++i)
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variableContainer.emplace_back(Scope::Variable{YulString{}, YulString("v" + to_string(i))});
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Stack from = {{
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VariableSlot{variableContainer[0]},
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VariableSlot{variableContainer[1]},
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VariableSlot{variableContainer[2]},
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VariableSlot{variableContainer[3]},
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VariableSlot{variableContainer[4]},
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VariableSlot{variableContainer[5]},
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VariableSlot{variableContainer[6]},
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VariableSlot{variableContainer[7]},
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VariableSlot{variableContainer[8]},
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VariableSlot{variableContainer[9]},
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VariableSlot{variableContainer[10]},
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VariableSlot{variableContainer[11]},
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VariableSlot{variableContainer[12]},
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VariableSlot{variableContainer[12]},
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VariableSlot{variableContainer[13]},
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VariableSlot{variableContainer[14]}
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}};
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Stack to = {{
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VariableSlot{variableContainer[0]},
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VariableSlot{variableContainer[1]},
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VariableSlot{variableContainer[2]},
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VariableSlot{variableContainer[3]},
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VariableSlot{variableContainer[4]},
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VariableSlot{variableContainer[5]},
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VariableSlot{variableContainer[6]},
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VariableSlot{variableContainer[7]},
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VariableSlot{variableContainer[8]},
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VariableSlot{variableContainer[9]},
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VariableSlot{variableContainer[10]},
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VariableSlot{variableContainer[11]},
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VariableSlot{variableContainer[12]},
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VariableSlot{variableContainer[12]},
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VariableSlot{variableContainer[13]},
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VariableSlot{variableContainer[14]},
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VariableSlot{variableContainer[14]}, // While "optimal", bringing this slot up first will make the next unreachable.
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VariableSlot{variableContainer[0]}
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}};
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BOOST_CHECK(!triggersStackTooDeep(from, to));
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}
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BOOST_AUTO_TEST_SUITE_END()
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} // end namespaces
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