pytorch

e179a568 - [FX Splitter] dump final graph and print operator stats via to_glow API

[FX Splitter] dump final graph and print operator stats via to_glow API Summary: - dump final graph in glow - print operator stats via to_glow API - 1) node stats for final glow graph - 2) operator stats in TorchGlowBackend for torch::jit::graph to lower Reviewed By: khabinov Differential Revision: D28444501 fbshipit-source-id: 743755c320071edc4c045ad004adeb16b4a9c323