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### Description <!-- Describe your changes. --> This change addresses the following issues with the current CustomOP Output Type inference - The function does not take into account optional inputs. When input is absent the inference is silently aborted, and no output type is inferred (P1 customer issue) - Inferring output type based on the input type for multi-kernel custom ops is done based on the latest in sequence kernel definition. There is not an attempt made to match the kernel based on the input type. - Inference is aborted when variadic inputs/outputs are detected when the generated input/output names fail to obtain type constraints. This is not immediately clear from the code, because custom op schema is not available within the inference function. - No error reporting. ### Motivation and Context <!-- - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to the issue here. --> Most of CustomOPs lack their own type and shape inference function as it was recently introduced. For that reason, it is important to fix this. This change is inspired by a customer issue. This is a follow up on: - https://github.com/microsoft/onnxruntime/pull/15184 - https://github.com/cbourjau/ort-custom-op/pull/11 - https://github.com/microsoft/onnxruntime-extensions/issues/451 |
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