Michael Schimmel
283cdf61a4
This commit refactors the `UsageInfo` struct to use a single `HashSet<Address>` for both used and assigned addresses, simplifying the logic. It also updates the `SubstitutionMap` to use a similar approach for tracking assigned values. Key changes include: - `UsageInfo` now has `used` and `assigned` fields of type `HashSet<Address>`. - `SubstitutionMap`'s `add_local`, `add_global`, `add_upvalue`, `remove_local`, `remove_global`, and `remove_upvalue` methods have been replaced with a generic `add_value` and `remove_value` that operate on `Address`. - The `Optimizer`'s `collect_pattern_usage` and `visit_node` methods have been updated to use the new `UsageInfo` and `SubstitutionMap` APIs. - `Get` and `Set` nodes now use `sub.map_address` to transform addresses based on the current substitution.