Emitting netlists with non-uniquified hierarchy

[povik]

A notable shortcoming of the current frontend is that it always uniquifies the design hierarchy. Definitions of modules are copied per each instance even if the definition is identical and could be shared.

The slang AST, which we consume, already has this property. See MikePopoloski/slang#949 for a related slang issue

[povik]

Starting with 05b36c9 2a93355 we now reuse modules if "instance caching" is enabled through option --disable-instance-caching=false. Later this will become the default

[povik]

Starting with 05b36c9 2a93355 we now reuse modules if "instance caching" is enabled through option --disable-instance-caching=false. Later this will become the default

At this time the feature is experimental. Known bugs:

• scopes remap doesn't match canonical body leading to error "While generating the netlist content ... wire for symbol ... is missing"