Recompute: fix bug with transformer attention mask #34664
Merged
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PR types
Bug fixes
PR changes
OPs
Describe
NOTE In Transformer-like network, if user put the attention mask into the recompute segment output,
pylayer will force the stop_gradient of attention mask to be False, which will make the number of
tensor that need grad does not match.
the backward_inputs_with_grad is used to avoid this case.