[Semi-Auto] Add split infer_backward rule #56508
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JZ-LIANG
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| std::vector<TensorDistAttr> output_dist_attrs; | ||
| for (int64_t i = 0; i < noutputs; i++) { | ||
| output_dist_attrs.emplace_back(output_specs[i].dist_attr()); |
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problematic, if output tensor split_axis is sharded, it should be recover to replicated.
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| # num_or_sections = 2, axis = 1 | ||
| # [0, -1, -1], [0, -1, -1] --> [0, -1, -1], [0, -1, -1], [0, -1, -1] | ||
| # (outputs --> input, outputs) |
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lack case where one or multiple output tensors are sharded on split_axis.
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PR types
Function optimization
PR changes
Others
Description
Pcard-70448
Add infer_backward rule for split to infer inputs' dims mappings from outputs':