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DecideLayer fix out dim tag #617

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DecideLayer fix out dim tag #617

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10 changes: 7 additions & 3 deletions returnn/tf/layers/rec.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5220,10 +5220,14 @@ def decide(cls, src, output=None, owner=None, name=None, length_normalization=Fa
output.size_placeholder = {}
for i, size in src_data.size_placeholder.items():
tag = DimensionTag.get_tag_from_size_tensor(size)
size = tf.reshape(size, [batch_dim, beam_size]) # (batch, beam)
size = tf.gather_nd(size, indices=beam_idxs_ext) # (batch,)
if tag:
assert tag
tag = tag.get_for_batch(output.batch)
if tag.dyn_size is None:
size = tf.reshape(size, [batch_dim, beam_size]) # (batch, beam)
size = tf.gather_nd(size, indices=beam_idxs_ext) # (batch,)
tag.set_tag_on_size_tensor(size, batch=output.batch)
else:
size = tag.dyn_size
output.size_placeholder[i] = size
final_search_choices = SearchChoices(owner=owner, is_decided=True, beam_size=1)
if owner:
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