onnxruntime

f4edf9bb - Extend QDQPropagation transformer to handle multiple consumers (#21313)

Extend QDQPropagation transformer to handle multiple consumers (#21313) ### Description - Extends the QDQPropagationTransformer to propagate DQs (forward) across operators with multiple consumers (previously only supported 1 consumer). - Adds Slice to the list of operators that the QDQPropagationTransformer can propagate DQ/Q ops across. - Supports QDQ propagation for opset 21. - Correctly copies Q or DQ attributes when creating new nodes. ### Motivation and Context The QDQPropagationTransformer fixes up QDQ node units for certain "data movement" ops (e.g., Transpose) by inserting Q -> DQ sequences where necessary. For example, the sequence `DQ -> Transpose -> Sigmoid` is transformed to `DQ -> Transpose -> Q -> DQ -> Sigmoid`. However, this fix-up does not currently support data movement ops with multiple consumers, as in: ``` DQ -> Transpose --+--> Sigmoid -> | +--> Relu -> | +-> graph_output ``` With the updates in this PR, the above model can be transformed to: ``` DQ -> Transpose -> Q --+--> DQ -> Sigmoid -> | +--> DQ -> Relu -> | +--> DQ -> graph_output ``` This update allows QNN EP to support quantized models created with tools that do not wrap data movement ops in Q/DQ ops. --------- Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>