Commit c93e8323 authored by simonpj@microsoft.com's avatar simonpj@microsoft.com

Re-implement the binder-swap stuff in OccurAnal

This is a pretty big patch, but it has a very local effect.
It affects only the binder-swap mechanism in OccurAnal, which
was not working well becuase it's more subtle than I'd realised
(See Note [getProxies is subtle]).  I think this does a much
better job.
parent 522c1e96
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