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Correct type conversions.

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This commit is contained in:
Christian 2015-01-07 23:45:26 +01:00
parent 396f638ce1
commit 501ad14ed1
1 changed files with 34 additions and 13 deletions
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47
ExpressionCompiler.cpp
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@ -194,13 +194,7 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
solAssert(_functionCall.getArguments().size() == 1, "");
Expression const& firstArgument = *_functionCall.getArguments().front();
firstArgument.accept(*this);
if (firstArgument.getType()->getCategory() == Type::Category::CONTRACT &&
_functionCall.getType()->getCategory() == Type::Category::INTEGER)
{
// explicit type conversion contract -> address, nothing to do.
}
else
appendTypeConversion(*firstArgument.getType(), *_functionCall.getType());
appendTypeConversion(*firstArgument.getType(), *_functionCall.getType());
}
else
{
@ -250,13 +244,17 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
FunctionCallOptions options;
options.bare = true;
options.obtainAddress = [&]() { _functionCall.getExpression().accept(*this); };
options.obtainValue = [&]() { arguments.front()->accept(*this); };
options.obtainValue = [&]()
{
arguments.front()->accept(*this);
appendTypeConversion(*arguments.front()->getType(),
*function.getParameterTypes().front(), true);
};
appendExternalFunctionCall(FunctionType({}, {}, Location::EXTERNAL), {}, options);
break;
}
case Location::SUICIDE:
arguments.front()->accept(*this);
//@todo might not be necessary
appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
m_context << eth::Instruction::SUICIDE;
break;
@ -362,6 +360,8 @@ void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
break;
case Type::Category::CONTRACT:
{
appendTypeConversion(*_memberAccess.getExpression().getType(),
IntegerType(0, IntegerType::Modifier::ADDRESS), true);
ContractType const& type = dynamic_cast<ContractType const&>(*_memberAccess.getExpression().getType());
m_context << type.getFunctionIdentifier(member);
break;
@ -592,15 +592,36 @@ void ExpressionCompiler::appendTypeConversion(Type const& _typeOnStack, Type con
return;
Type::Category stackTypeCategory = _typeOnStack.getCategory();
Type::Category targetTypeCategory = _targetType.getCategory();
if (stackTypeCategory == Type::Category::INTEGER)
if (stackTypeCategory == Type::Category::INTEGER || stackTypeCategory == Type::Category::CONTRACT ||
stackTypeCategory == Type::Category::INTEGER_CONSTANT)
{
solAssert(targetTypeCategory == Type::Category::INTEGER || targetTypeCategory == Type::Category::CONTRACT, "");
appendHighBitsCleanup(dynamic_cast<IntegerType const&>(_typeOnStack));
IntegerType addressType(0, IntegerType::Modifier::ADDRESS);
IntegerType const& targetType = targetTypeCategory == Type::Category::INTEGER
? dynamic_cast<IntegerType const&>(_targetType) : addressType;
if (stackTypeCategory == Type::Category::INTEGER_CONSTANT)
{
IntegerConstantType const& constType = dynamic_cast<IntegerConstantType const&>(_typeOnStack);
// We know that the stack is clean, we only have to clean for a narrowing conversion
// where cleanup is forced.
if (targetType.getNumBits() < constType.getIntegerType()->getNumBits() && _cleanupNeeded)
appendHighBitsCleanup(targetType);
}
else
{
IntegerType const& typeOnStack = stackTypeCategory == Type::Category::INTEGER
? dynamic_cast<IntegerType const&>(_typeOnStack) : addressType;
// Widening: clean up according to source type width
// Non-widening and force: clean up according to target type bits
if (targetType.getNumBits() > typeOnStack.getNumBits())
appendHighBitsCleanup(typeOnStack);
else if (_cleanupNeeded)
appendHighBitsCleanup(targetType);
}
}
else if (stackTypeCategory == Type::Category::INTEGER_CONSTANT)
solAssert(targetTypeCategory == Type::Category::INTEGER || targetTypeCategory == Type::Category::CONTRACT, "");
else if (stackTypeCategory == Type::Category::STRING)
{
solAssert(targetTypeCategory == Type::Category::STRING, "");
// nothing to do, strings are high-order-bit-aligned
//@todo clear lower-order bytes if we allow explicit conversion to shorter strings
}