Hi LLVM developers,
Does it need to implement <Target>RetpolineThunksPass, `getOpcodeForRetpoline`, `EmitLoweredRetpoline`, etc. for other Targets? Or does it also need to implement `RetpolinePic` to inherit from <Target> for LLD's Backends? Alex is my mentor, he is leading me to maintain RISCV target, so I have such question, please give me suggestions, thanks for your teaching!