fix: raise CoreMLExportError on incompatible palettization configs#44
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guru-desh wants to merge 3 commits into
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fix: raise CoreMLExportError on incompatible palettization configs#44guru-desh wants to merge 3 commits into
guru-desh wants to merge 3 commits into
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…hecks Vector palettization, LUT quantization, and per-channel scale are each independently CoreML-exportable, but combining any two breaks CoreML/MIL's constexpr_lut_to_dense op with a rank mismatch, a missing vector_axis, or an indices/LUT divisibility error depending on the pair. Add a dedicated validator (composing the existing LUT dtype check) so the kmeans export path has one entry point to reject these combinations with a clear CoreMLExportError, instead of relying on a test-side skip to hide them.
…port Wire validate_coreml_palettization_compatibility into prepare_for_mil_export so finalize(backend=CoreML) raises immediately for a combo it can't fuse into a single compatible op chain, rather than emitting an invalid model or crashing deep inside ct.convert.
Replace the pytest.skip-based _skip_unsupported_mil_configs with a predicate (_has_unsupported_mil_combo) and assert finalize() raises CoreMLExportError, mirroring the existing float-LUT-dtype rejection path. Rename _assert_coreml_rejects_unsupported_lut to _assert_coreml_rejects since it's now shared by both rejection cases.
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Stacked on #42 — this branch is rebased ontoremove-coreml-export-tests, so this diff includes #42's commits plus 3 new ones on top. Once #42 merges, only the last 3 commits here will remain.In our test suite, we had
pytest.skipsome incompatible palettization configs, but this doesn't prevent users from using these configs.We refactor the test by removing
pytest.skipand changing the tests to check thatCoreMLExportErroris raised. We also createvalidate_coreml_palettization_compatibilitythat contains the logic that decides whenCoremlExportErroris raised.