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Add a reduction that removes fields from domain definitions and updates all uses. This reduction uses the multiple matches feature where each domain field generates a separate match, allowing circt-reduce to try different combinations of field removals. The reduction performs the following steps: 1. Generates one match per field in each domain 2. Removes the specified fields from domain definitions 3. Replaces domain.subfield operations with unknown values when their accessed fields are removed 4. Updates all DomainType references throughout the circuit to reflect the new field structure This is useful for reducing circuits that use domains to model clocks, power domains, or other design aspects, allowing the reducer to simplify the domain structure while maintaining a valid circuit. AI-assisted-by: Augment (Claude Sonnet 4.5) Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
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Add a reduction that removes fields from domain definitions and updates
all uses. Try to remove each individual field from all domains that
exist. If a domain field has uses, then replace these with unknown value.
AI-assisted-by: Augment (Claude Sonnet 4.5)
Note: I have not had time to review this, yet! This is draft until I
can come back to it.