enhancement needed

[hanfeng0114]

The following code can't compile well on latest clang:

Enums.cc:
const string EOperandType_to_string(EOperandType in_enum)
{
switch (in_enum) {
case EOperandType::Constant: return "Constant";
case EOperandType::Immediate: return "Immediate";
case EOperandType::Choices: return "Choices";
case EOperandType::Register: return "Register";
case EOperandType::GPR: return "GPR";
case EOperandType::GPRSP: return "GPRSP";
case EOperandType::FPR: return "FPR";
case EOperandType::SIMDSR: return "SIMDSR";
case EOperandType::SIMDVR: return "SIMDVR";
case EOperandType::SysReg: return "SysReg";
case EOperandType::Branch: return "Branch";
case EOperandType::LoadStore: return "LoadStore";
case EOperandType::AuthBranch: return "AuthBranch";
case EOperandType::AuthLoadStore: return "AuthLoadStore";
case EOperandType::SystemOp: return "SystemOp";
case EOperandType::VECREG: return "VECREG";
case EOperandType::PREDREG: return "PREDREG";
case EOperandType::ALU: return "ALU";
case EOperandType::DataProcessing: return "DataProcessing";
default:
unknown_enum_value("EOperandType", (unsigned char)(in_enum));
}
return "";
}

The reason: https://stackoverflow.com/questions/8357240/how-to-automatically-convert-strongly-typed-enum-into-int

We need to enhance the code related.