[OM][firtool][om-linker] Elaborate public classes before emission/after linking. #10480
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Propagate symbol visibility from firrtl.module to om.class. Tweak mlir text syntax. Extracted from #10480. Assisted-by: augment: sonnet 4.5
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Add a best-effort om-elaborate-object mode for elaborating all public OM classes. This mode leaves external objects and other unevaluated operations intact instead of treating them as errors, making it suitable for firtool’s final OM processing. Run this elaboration in firtool after om-freeze-paths so public OM classes expose frozen paths and folded object-field accesses. Preserve strict behavior for explicit target-class and test modes. Also propagate FIRRTL symbol visibility to generated OM classes during LowerClasses, so classes generated from private FIRRTL modules/classes are private as well.
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Add a best-effort om-elaborate-object mode for elaborating all public OM classes. This mode leaves external objects and other unevaluated operations intact instead of treating them as errors, making it suitable for firtool’s final OM processing.
om-linker also runs another elaboration after linking so that properties can be used as interface contract.
This depends on #10440.
Assisted-by: augment: sonnet 4.5