solidity/test/libyul/StackShufflingTest.cpp

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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Unit tests for stack shuffling.
*/
#include <libyul/backends/evm/StackHelpers.h>
#include <boost/test/unit_test.hpp>
using namespace std;
using namespace solidity::langutil;
namespace solidity::yul::test
{
BOOST_AUTO_TEST_SUITE(YulStackShuffling)
BOOST_AUTO_TEST_CASE(swap_cycle)
{
std::vector<Scope::Variable> scopeVariables;
Scope::Function function;
std::vector<VariableSlot> v;
for (size_t i = 0; i < 17; ++i)
scopeVariables.emplace_back(Scope::Variable{""_yulstring, YulString{"v" + to_string(i)}});
for (size_t i = 0; i < 17; ++i)
v.emplace_back(VariableSlot{scopeVariables[i]});
Stack sourceStack{
v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[9], v[10], v[11], v[12], v[13], v[14], v[15], v[16],
FunctionReturnLabelSlot{function}, FunctionReturnLabelSlot{function}, v[5]};
Stack targetStack{
v[1], v[0], v[2], v[3], v[4], v[5], v[6], v[7], v[9], v[10], v[11], v[12], v[13], v[14], v[15], v[16],
FunctionReturnLabelSlot{function}, JunkSlot{}, JunkSlot{}
};
// Used to hit a swapping cycle.
createStackLayout(sourceStack, targetStack, [](auto){}, [](auto){}, [](){});
}
BOOST_AUTO_TEST_SUITE_END()
}