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- # Copyright (c) Meta Platforms, Inc. and affiliates
- from collections import defaultdict
- import torch
- from torch.export.unflatten import _ModuleFrame, _SubmoduleEntry
- def _outline_submodules(orig_graph: torch.fx.Graph) -> torch.fx.GraphModule:
- # Create an empty GraphModule to hold the outlined modules
- new_module = torch.fx.GraphModule(torch.nn.Module(), torch.fx.Graph())
- seen_nodes: dict[str, torch.fx.Node] = {}
- seen_modules: dict[int, list[_SubmoduleEntry]] = defaultdict(list)
- seen_attrs: dict[str, set[str]] = defaultdict(set)
- created_modules: dict[str, torch.nn.Module] = {}
- _ModuleFrame(
- orig_graph,
- tuple(orig_graph.nodes),
- seen_nodes,
- seen_modules,
- seen_attrs,
- created_modules,
- None,
- [("", None, 0)],
- "",
- {},
- module=new_module,
- ).run_outer()
- new_module.graph.lint()
- new_module.recompile()
- return new_module
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