1 files changed, 146 insertions, 0 deletions
diff --git a/solidityOptimizerTest.cpp b/solidityOptimizerTest.cpp
new file mode 100644
index 00000000..388e0579
--- /dev/null
+++ b/solidityOptimizerTest.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(SolidityOptimizerTest, 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