[relax][tflite] Add PRELU/LRN/SQUARED_DIFFERENCE tests (partial #18971)#19404
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tlopex merged 3 commits intoapache:mainfrom Apr 15, 2026
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This pull request implements Local Response Normalization (LRN) in the TFLite frontend by decomposing it into square, average pooling, and power operations, as Relax currently lacks a native LRN operator. It also fixes the argument order in the squared difference conversion, adds normalization to PReLU broadcasting, and removes redundant parameters from transpose convolution. Extensive unit tests were added for these operators. Feedback focuses on ensuring the LRN pooling step correctly handles boundary conditions by setting count_include_pad=True and normalizing the reshaped pooled output to maintain consistent structural information.
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Summary
This PR partially implements test coverage requested in issue #18971 for Relax TFLite frontend operator tests.
Added explicit tests in tests/python/relax/test_frontend_tflite.py:
Validation
Ran:
pytest tests/python/relax/test_frontend_tflite.py -k 'test_prelu or test_squared_difference or test_local_response_normalization' -qResult:
Refs: #18971