Bin2llvmir: inspect success rate of adapter_methods pass

Find out how many functions (e.g. in regression tests) are marker as adapters (wrappers) and how many of them are actually wrappers. It is quite possible that `adapter-methods` pass is not very reliable and does more bad than good.

If so, can we make it better. Do we actually need a pass like that?

Start by locating the adapter_methods pass and the regression tests referenced in the issue. Measure how many functions are marked as adapters and how many are actual wrappers, then use those results to assess whether the pass should be improved or removed.

Written by the indexing model from the issue text.