1 files changed, 130 insertions, 0 deletions
diff --git a/test/libjulia/Simplifier.cpp b/test/libjulia/Simplifier.cpp
new file mode 100644
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+++ b/test/libjulia/Simplifier.cpp
@@ -0,0 +1,130 @@
+/*
+    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/>.
+*/
+/**
+ * @date 2017
+ * Unit tests for the expression simplifier optimizer stage.
+ */
+
+#include <test/libjulia/Common.h>
+
+#include <libjulia/optimiser/ExpressionSimplifier.h>
+
+#include <libsolidity/inlineasm/AsmPrinter.h>
+
+#include <boost/test/unit_test.hpp>
+
+#include <boost/range/adaptors.hpp>
+#include <boost/algorithm/string/join.hpp>
+
+using namespace std;
+using namespace dev;
+using namespace dev::julia;
+using namespace dev::julia::test;
+using namespace dev::solidity;
+
+
+#define CHECK(_original, _expectation)\
+do\
+{\
+	assembly::AsmPrinter p;\
+	Block b = *(parse(_original, false).first);\
+	(ExpressionSimplifier{})(b);\
+	string result = p(b);\
+	BOOST_CHECK_EQUAL(result, format(_expectation, false));\
+}\
+while(false)
+
+BOOST_AUTO_TEST_SUITE(IuliaSimplifier)
+
+BOOST_AUTO_TEST_CASE(smoke_test)
+{
+	CHECK("{ }", "{ }");
+}
+
+BOOST_AUTO_TEST_CASE(constants)
+{
+	CHECK(
+		"{ let a := add(1, mul(3, 4)) }",
+		"{ let a := 13 }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(invariant)
+{
+	CHECK(
+		"{ let a := mload(sub(7, 7)) let b := sub(a, 0) }",
+		"{ let a := mload(0) let b := a }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(reversed)
+{
+	CHECK(
+		"{ let a := add(0, mload(0)) }",
+		"{ let a := mload(0) }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(constant_propagation)
+{
+	CHECK(
+		"{ let a := add(7, sub(mload(0), 7)) }",
+		"{ let a := mload(0) }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(identity_rules_simple)
+{
+	CHECK(
+		"{ let a := mload(0) let b := sub(a, a) }",
+		"{ let a := mload(0) let b := 0 }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(identity_rules_complex)
+{
+	CHECK(
+		"{ let a := sub(calldataload(0), calldataload(0)) }",
+		"{ let a := 0 }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(identity_rules_negative)
+{
+	CHECK(
+		"{ let a := sub(calldataload(1), calldataload(0)) }",
+		"{ let a := sub(calldataload(1), calldataload(0)) }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(including_function_calls)
+{
+	CHECK(
+		"{ function f() -> a {} let b := add(7, sub(f(), 7)) }",
+		"{ function f() -> a {} let b := f() }"
+	);
+}
+
+BOOST_AUTO_TEST_CASE(inside_for)
+{
+	CHECK(
+		"{ for { let a := 10 } iszero(eq(a, 0)) { a := add(a, 1) } {} }",
+		"{ for { let a := 10 } iszero(iszero(a)) { a := add(a, 1) } {} }"
+	);
+}
+
+BOOST_AUTO_TEST_SUITE_END()