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Emil J. Tywoniak
ba74d22f6b
Source locations move off the attribute dict into a dedicated SrcRef on AttrObject, interned in a per-design SrcPool that hash-conses sets of location twines. Locations share their file prefix with each other through the twine pool, and objects that fuse (opt_merge, share, ff/mem rewrites) carry the union of their inputs' locations instead of a '|'-joined string. write_rtlil emits an `srcs` section of location sets alongside `twines`; read_rtlil resolves `\src "@N"` back to a handle and still accepts a plain location string. -readable renders the locations as text.