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Serialize PTD files with named data #10327

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Apr 21, 2025
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Serialize PTD files with named data #10327

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11 changes: 8 additions & 3 deletions exir/_serialize/_serialize.py
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Original file line number Diff line number Diff line change
Expand Up @@ -102,29 +102,34 @@ def serialize_for_executorch(
)

for tag in all_external_tags:
buffers = []
fqn_to_tensor_entry: Dict[str, TensorEntry] = {}
# pyre-ignore[16]: Undefined attribute: `Optional` has no attribute `get`.
fqn_to_index = emitter_output.external_constant_map.get(tag, {})
# Create a TensorEntry for each external tensor.
for fqn, index in fqn_to_index.items():
assert fqn in fqn_to_tensor_layout
fqn_to_tensor_entry[fqn] = TensorEntry(
buffer_index=index,
buffer_index=len(buffers),
layout=fqn_to_tensor_layout[fqn],
)
buffers.append(emitter_output.external_constant_buffer[index])

# Extract external data.
key_to_data: Dict[str, DataEntry] = {}
# pyre-ignore[16]: Undefined attribute: `Optional` has no attribute `get`.
key_to_buffer_index = named_data.external_data.get(tag, {})
for key, index in key_to_buffer_index.items():
# pyre-ignore[16]: Undefined attribute: `Optional` has no attribute `buffers`.
key_to_data[key] = DataEntry(index, named_data.buffers[index].alignment)
key_to_data[key] = DataEntry(
len(buffers), named_data.buffers[index].alignment
)
buffers.append(named_data.buffers[index].buffer)

# Serialize into PTD file.
ptd_files[tag] = data_serializer.serialize(
DataPayload(
buffers=emitter_output.external_constant_buffer,
buffers=buffers,
fqn_to_tensor=fqn_to_tensor_entry,
key_to_data=key_to_data,
)
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