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| author | Leonardo Alt <leonardoaltt@gmail.com> | 2017-12-19 02:43:15 +0800 |
|---|---|---|
| committer | Leonardo Alt <leonardoaltt@gmail.com> | 2018-01-05 01:20:12 +0800 |
| commit | d0abc5359b24a27376cc1a4ba8d0b35e7ca036d2 (patch) | |
| tree | 7b25741ef7da65d75d780cb3397e781bbe53ab8d /test | |
| parent | 6a9a4e2bb860e7e1c8bd832b251dc6877912c233 (diff) | |
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[SMTChecker] Variables are merged after branches (ite variables)
Diffstat (limited to 'test')
| -rw-r--r-- | test/libsolidity/SMTChecker.cpp | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/test/libsolidity/SMTChecker.cpp b/test/libsolidity/SMTChecker.cpp index 3a65aa43..2a1609cc 100644 --- a/test/libsolidity/SMTChecker.cpp +++ b/test/libsolidity/SMTChecker.cpp @@ -168,9 +168,9 @@ BOOST_AUTO_TEST_CASE(function_call_does_not_clear_local_vars) CHECK_SUCCESS_NO_WARNINGS(text); } -BOOST_AUTO_TEST_CASE(branches_clear_variables) +BOOST_AUTO_TEST_CASE(branches_merge_variables) { - // Only clears accessed variables + // Branch does not touch variable a string text = R"( contract C { function f(uint x) public pure { @@ -182,7 +182,7 @@ BOOST_AUTO_TEST_CASE(branches_clear_variables) } )"; CHECK_SUCCESS_NO_WARNINGS(text); - // It is just a plain clear and will not combine branches. + // Positive branch touches variable a, but assertion should still hold. text = R"( contract C { function f(uint x) public pure { @@ -194,8 +194,8 @@ BOOST_AUTO_TEST_CASE(branches_clear_variables) } } )"; - CHECK_WARNING(text, "Assertion violation happens here"); - // Clear also works on the else branch + CHECK_SUCCESS_NO_WARNINGS(text); + // Negative branch touches variable a, but assertion should still hold. text = R"( contract C { function f(uint x) public pure { @@ -208,8 +208,8 @@ BOOST_AUTO_TEST_CASE(branches_clear_variables) } } )"; - CHECK_WARNING(text, "Assertion violation happens here"); - // Variable is not cleared, if it is only read. + CHECK_SUCCESS_NO_WARNINGS(text); + // Variable is not merged, if it is only read. text = R"( contract C { function f(uint x) public pure { @@ -224,6 +224,36 @@ BOOST_AUTO_TEST_CASE(branches_clear_variables) } )"; CHECK_SUCCESS_NO_WARNINGS(text); + // Variable is reset in both branches + text = R"( + contract C { + function f(uint x) public pure { + uint a = 2; + if (x > 10) { + a = 3; + } else { + a = 3; + } + assert(a == 3); + } + } + )"; + CHECK_SUCCESS_NO_WARNINGS(text); + // Variable is reset in both branches + text = R"( + contract C { + function f(uint x) public pure { + uint a = 2; + if (x > 10) { + a = 3; + } else { + a = 4; + } + assert(a >= 3); + } + } + )"; + CHECK_SUCCESS_NO_WARNINGS(text); } BOOST_AUTO_TEST_CASE(branches_assert_condition) @@ -262,7 +292,7 @@ BOOST_AUTO_TEST_CASE(branches_assert_condition) CHECK_SUCCESS_NO_WARNINGS(text); } -BOOST_AUTO_TEST_CASE(ways_to_clear_variables) +BOOST_AUTO_TEST_CASE(ways_to_merge_variables) { string text = R"( contract C { @@ -275,6 +305,7 @@ BOOST_AUTO_TEST_CASE(ways_to_clear_variables) } } )"; + CHECK_WARNING(text, "Assertion violation happens here"); text = R"( contract C { function f(uint x) public pure { |