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Equality operator allowed for external function types

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This commit is contained in:
nishant-sachdeva
2022-01-19 15:20:31 +05:30
parent a07b3ec70f
commit a0d6c11860
11 changed files with 244 additions and 12 deletions
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libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+19 -7
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@@ -799,13 +799,8 @@ bool IRGeneratorForStatements::visit(BinaryOperation const& _binOp)
if (TokenTraits::isCompareOp(op))
{
if (auto type = dynamic_cast<FunctionType const*>(commonType))
{
solAssert(op == Token::Equal || op == Token::NotEqual, "Invalid function pointer comparison!");
solAssert(type->kind() != FunctionType::Kind::External, "External function comparison not allowed!");
}
solAssert(commonType->isValueType(), "");
bool isSigned = false;
if (auto type = dynamic_cast<IntegerType const*>(commonType))
isSigned = type->isSigned();
@@ -813,8 +808,25 @@ bool IRGeneratorForStatements::visit(BinaryOperation const& _binOp)
string args = expressionAsType(_binOp.leftExpression(), *commonType, true);
args += ", " + expressionAsType(_binOp.rightExpression(), *commonType, true);
auto functionType = dynamic_cast<FunctionType const*>(commonType);
solAssert(functionType ? (op == Token::Equal || op == Token::NotEqual) : true, "Invalid function pointer comparison!");
string expr;
if (op == Token::Equal)
if (functionType && functionType->kind() == FunctionType::Kind::External)
{
solUnimplementedAssert(functionType->sizeOnStack() == 2, "");
expr = m_utils.externalFunctionPointersEqualFunction() +
"(" +
IRVariable{_binOp.leftExpression()}.part("address").name() + "," +
IRVariable{_binOp.leftExpression()}.part("functionSelector").name() + "," +
IRVariable{_binOp.rightExpression()}.part("address").name() + "," +
IRVariable{_binOp.rightExpression()}.part("functionSelector").name() +
")";
if (op == Token::NotEqual)
expr = "iszero(" + expr + ")";
}
else if (op == Token::Equal)
expr = "eq(" + move(args) + ")";
else if (op == Token::NotEqual)
expr = "iszero(eq(" + move(args) + "))";