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/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Tests for the Solidity optimizer.
*/
#include <string>
#include <tuple>
#include <boost/test/unit_test.hpp>
#include <boost/lexical_cast.hpp>
#include <test/solidityExecutionFramework.h>
using namespace std;
namespace dev
{
namespace solidity
{
namespace test
{
class OptimizerTestFramework: public ExecutionFramework
{
public:
OptimizerTestFramework() { }
/// Compiles the source code with and without optimizing.
void compileBothVersions(unsigned _expectedSizeDecrease, std::string const& _sourceCode, u256 const& _value = 0, std::string const& _contractName = "") {
m_optimize = false;
bytes nonOptimizedBytecode = compileAndRun(_sourceCode, _value, _contractName);
m_nonOptimizedContract = m_contractAddress;
m_optimize = true;
bytes optimizedBytecode = compileAndRun(_sourceCode, _value, _contractName);
int sizeDiff = nonOptimizedBytecode.size() - optimizedBytecode.size();
BOOST_CHECK_MESSAGE(sizeDiff == int(_expectedSizeDecrease), "Bytecode did only shrink by "
+ boost::lexical_cast<string>(sizeDiff) + " bytes, expected: "
+ boost::lexical_cast<string>(_expectedSizeDecrease));
m_optimizedContract = m_contractAddress;
}
template <class... Args>
void compareVersions(byte _index, Args const&... _arguments)
{
m_contractAddress = m_nonOptimizedContract;
bytes nonOptimizedOutput = callContractFunction(_index, _arguments...);
m_contractAddress = m_optimizedContract;
bytes optimizedOutput = callContractFunction(_index, _arguments...);
BOOST_CHECK_MESSAGE(nonOptimizedOutput == optimizedOutput, "Computed values do not match."
"\nNon-Optimized: " + toHex(nonOptimizedOutput) +
"\nOptimized: " + toHex(optimizedOutput));
}
protected:
Address m_optimizedContract;
Address m_nonOptimizedContract;
};
BOOST_FIXTURE_TEST_SUITE(SolidityOptimizer, OptimizerTestFramework)
BOOST_AUTO_TEST_CASE(smoke_test)
{
char const* sourceCode = R"(
contract test {
function f(uint a) returns (uint b) {
return a;
}
})";
compileBothVersions(4, sourceCode);
compareVersions(0, u256(7));
}
BOOST_AUTO_TEST_CASE(large_integers)
{
char const* sourceCode = R"(
contract test {
function f() returns (uint a, uint b) {
a = 0x234234872642837426347000000;
b = 0x110000000000000000000000002;
}
})";
compileBothVersions(28, sourceCode);
compareVersions(0);
}
BOOST_AUTO_TEST_CASE(invariants)
{
char const* sourceCode = R"(
contract test {
function f(uint a) returns (uint b) {
return (((a + (1 - 1)) ^ 0) | 0) & (uint(0) - 1);
}
})";
compileBothVersions(28, sourceCode);
compareVersions(0, u256(0x12334664));
}
BOOST_AUTO_TEST_CASE(unused_expressions)
{
char const* sourceCode = R"(
contract test {
uint data;
function f() returns (uint a, uint b) {
10 + 20;
data;
}
})";
compileBothVersions(11, sourceCode);
compareVersions(0);
}
BOOST_AUTO_TEST_CASE(constant_folding_both_sides)
{
// if constants involving the same associative and commutative operator are applied from both
// sides, the operator should be applied only once, because the expression compiler
// (even in non-optimized mode) pushes literals as late as possible
char const* sourceCode = R"(
contract test {
function f(uint x) returns (uint y) {
return 98 ^ (7 * ((1 | (x | 1000)) * 40) ^ 102);
}
})";
compileBothVersions(31, sourceCode);
compareVersions(0);
}
BOOST_AUTO_TEST_SUITE_END()
}
}
} // end namespaces
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