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[RELAX][Frontend][ONNX] Support for SimplifiedLayerNormalization and SkipSimplifiedLayerNormalization contrib ops - #20607
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Summary
This PR adds frontend support for ONNX Runtime contrib operators SimplifiedLayerNormalization and SkipSimplifiedLayerNormalization in TVM Relax. These operators appear in transformer models (such as Xenova/sweep-next-edit-1.5B and SwinliQ-AIs/SmolLM2-1.7B-Instruct) and the absence of these ops raises tvm.error.OpNotImplemented error.
Scripts Involved
Testing & Validation
Test modules test_simplified_layer_norm and test_skipsimplifiedlayernormalization validate structural IR equality against expected TVMScript Relax IR for static and dynamic dimensions.
Closes #20625