[Fix][Relax]: ONNX Clip NaN bounds and preserve input NaN (ORT parity)#19535
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This pull request improves the ONNX Clip operator implementation in Relax to correctly handle NaN values in both the input tensor and the clip bounds (min/max). It introduces a helper function to identify floating-point types and a sanitization method for NaN bounds. Feedback includes correcting the casing of DataTypeCode constants to avoid runtime errors, refactoring duplicated comparison logic in tests, removing redundant test parameters, and expanding test coverage to explicitly verify that input NaNs are preserved.
…k_correctness - Extend tvm.testing.assert_allclose with equal_nan (forwarded to NumPy) and document parameters. - Refactor check_correctness _check_output to normalize ndarray once and call a single assert helper. - Parametrize test_clip_v13 over input vectors (finite vs NaN); adjust Clip v13 min/max fixture where needed.
tlopex
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May 12, 2026
tlopex
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…ndefined) Remove the explicit NaN-preservation guards added in the ONNX frontend for Relu (apache#19750), Sign (apache#19674), Clip's input (apache#19535), and ReduceMax/ReduceMin (the _reduce_min_max_preserve_nan helper, apache#19750). Each paid an extra isnan + where -- the reduce helper a full sum(isnan) pass -- over the data solely to force a NaN input through, a corner case that mostly shows up in fuzzing. NaN handling for these ops is now left unspecified, matching the less-strict but efficient direction: relu/sign reduce to the plain relax op and ReduceMax/ReduceMin to relax.op.max/min. Clip keeps the cheap scalar NaN-bound sanitization: a NaN min/max bound is still treated as unbounded (ORT parity), which is a distinct concern from per-element input-NaN passthrough. Drop the corresponding tests: test_relu_nan_preserve, test_sign_nan_preserve, test_reduce_min_max_nan_preserve, and the NaN-input case of test_clip_v13.
tqchen
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Jun 20, 2026
This pr removes the explicit NaN-preservation guards added in the ONNX frontend for Relu (#19750), Sign (#19674), Clip's input (#19535), and ReduceMax/ReduceMin (the _reduce_min_max_preserve_nan helper, #19750). Each paid an extra isnan + where -- the reduce helper a full sum(isnan) pass This pr also drops the corresponding tests: test_relu_nan_preserve, test_sign_nan_preserve, test_reduce_min_max_nan_preserve, and the NaN-input case of test_clip_v13. PRs about NaN-preservation updated in backend will be followed up in the future
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This PR fixes #19533: