how we can do when compile meet Unknown Opcode?

[Mojicode]

I use the solidity compiler to compile a contract, and there are some "Unknown Opcode" in the bytecode. When I use evmjit to deploy the contract, it will go to the default branch whitch means it is "Invalid instruction - abort", and will stop the compile immediately. Should I remove the default branch and complete the compile? Is it OK?

[chfast]

It terminates compilation because the code after "invalid instruction" within a basic block is unreachable.