Quantizer pass to insert quant-dequant nodes into IR (#18446)
Summary:
- Quantizer pass to mutate IR by inserting quant-dequant nodes
before and after nodes which support quantized ops. This information
will be used by jit compiler to substitute with quantized ops
- This currently covers simple model. It will be expanded later
for subgraph pattern matching to cover more complex patterns
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18446
Differential Revision: D14592265
Pulled By: nishantpdce
fbshipit-source-id: c9ba6c12aa96cb9c117826e386721eec83a55ea6
