Freezing Torchscript modules (#32178)
Summary:
This patch enables folding GetAttr nodes with their corresponding
values. _jit_pass_freeze_module API returns a new TorchScipt module
where all function calls and get attributes are inlined.
Usage:
frozen_model = torch._C._freeze_module(scrited_model._c)
frozen_model.forward(...)
This API currently optimizes the forward method. We will follow up to
to preserve and optimize methods and attributes that are annotated as
torch.jit.interface.
Several future improvements to JIT optimizations are required to maximize
clean up/de-sugar the graph and eliminate redundancies.
Ideally, we want to produce a graph that can easily be lowered to
GLOW and other low-level backends.
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/32178
Differential Revision: D19419640
Pulled By: bzinodev
fbshipit-source-id: 52baffaba9bca2cd60a8e747baa68d57711ad42b
