aboutsummaryrefslogtreecommitdiffstats
path: root/SolidityOptimizer.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'SolidityOptimizer.cpp')
-rw-r--r--SolidityOptimizer.cpp146
1 files changed, 146 insertions, 0 deletions
diff --git a/SolidityOptimizer.cpp b/SolidityOptimizer.cpp
new file mode 100644
index 00000000..ef5c6f9b
--- /dev/null
+++ b/SolidityOptimizer.cpp
@@ -0,0 +1,146 @@
+
+/*
+ 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