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Merge pull request #546 from chriseth/fixiszero

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Correctly use not/bnot/iszero.
This commit is contained in:
chriseth
2016-05-14 00:58:55 +02:00
parent 902f1458c6 a927efb151
commit 4b445b898e
3 changed files with 25 additions and 5 deletions
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test/libsolidity/SolidityEndToEndTest.cpp
+20
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@@ -6736,6 +6736,26 @@ BOOST_AUTO_TEST_CASE(internal_library_function_return_var_size)
BOOST_CHECK(callContractFunction("f()") == encodeArgs(u256(2)));
}
BOOST_AUTO_TEST_CASE(iszero_bnot_correct)
{
// A long time ago, some opcodes were renamed, which involved the opcodes
// "iszero" and "not".
char const* sourceCode = R"(
contract C {
function f() returns (bool) {
bytes32 x = 1;
assembly { x := not(x) }
if (x != ~bytes32(1)) return false;
assembly { x := iszero(x) }
if (x != bytes32(0)) return false;
return true;
}
}
)";
compileAndRun(sourceCode, 0, "C");
BOOST_CHECK(callContractFunction("f()") == encodeArgs(true));
}
BOOST_AUTO_TEST_SUITE_END()
}