Generating raw graph data in Protobuf format

[rahulvaidya20]

Hi @mangpo and @samihaija ,

Given a tensorflow program, I'm trying to generate the raw graph data (hoo) in protobuf and extract its features. I'm only looking for the default configuration (without autotuner/search space exploration). I tried generating HLO graph using tf’s experimental_get_compiler_ir function, but I don't think this graph format represents the pb format, defined in tuning.proto. It would be great if you can help me in this regard.