diff options
Diffstat (limited to 'Compiler.cpp')
| -rw-r--r-- | Compiler.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/Compiler.cpp b/Compiler.cpp index 6dc72840..40ed1fd8 100644 --- a/Compiler.cpp +++ b/Compiler.cpp @@ -178,6 +178,16 @@ void Compiler::appendFunctionSelector(ContractDefinition const& _contract) map<FixedHash<4>, FunctionTypePointer> interfaceFunctions = _contract.getInterfaceFunctions(); map<FixedHash<4>, const eth::AssemblyItem> callDataUnpackerEntryPoints; + FunctionDefinition const* fallback = _contract.getFallbackFunction(); + eth::AssemblyItem notFound = m_context.newTag(); + // shortcut messages without data if we have many functions in order to be able to receive + // ether with constant gas + if (interfaceFunctions.size() > 5 || fallback) + { + m_context << eth::Instruction::CALLDATASIZE << eth::Instruction::ISZERO; + m_context.appendConditionalJumpTo(notFound); + } + // retrieve the function signature hash from the calldata if (!interfaceFunctions.empty()) CompilerUtils(m_context).loadFromMemory(0, IntegerType(CompilerUtils::dataStartOffset * 8), true); @@ -189,7 +199,10 @@ void Compiler::appendFunctionSelector(ContractDefinition const& _contract) m_context << eth::dupInstruction(1) << u256(FixedHash<4>::Arith(it.first)) << eth::Instruction::EQ; m_context.appendConditionalJumpTo(callDataUnpackerEntryPoints.at(it.first)); } - if (FunctionDefinition const* fallback = _contract.getFallbackFunction()) + m_context.appendJumpTo(notFound); + + m_context << notFound; + if (fallback) { eth::AssemblyItem returnTag = m_context.pushNewTag(); fallback->accept(*this); @@ -198,6 +211,7 @@ void Compiler::appendFunctionSelector(ContractDefinition const& _contract) } else m_context << eth::Instruction::STOP; // function not found + for (auto const& it: interfaceFunctions) { FunctionTypePointer const& functionType = it.second; |