Attention with past and no unidirectional mask#5557
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tianleiwu
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wangyems
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Oct 21, 2020
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Description: Some user model has past state but the mask is not unidirectional (lower triangular). For example, all elements of the mask is 1. Update the attention op and fusion to support such case.
Also, handle subgraph pattern where multiple shape nodes are merged into one.
Motivation and Context