[Relay] Generate sub graphs from existing graph

[abhikran-quic]

Thanks you @comaniac! I intend to do the same thing i.e. adding complier begin for free_vars.

Could you please help in sharing some reference example which helps in doing so while annotating a precompiled graph? I’ve shared my reference code above which adds complier_begin to the first node but not sure how to do it for the nodes containing free_vars

@abhikran-quic

                    for arg in call.args:
                        ann = compiler_begin(super().visit(arg), annotator.compiler)
                        new_args.append(ann)
                    new_call = relay.Call(call.op, new_args, call.attrs, call.type_args)
                    return new_call