Avoiding construction of dead dictionaries

[Michael Sperber]

On Thu, Aug 12 2021, Simon Peyton Jones <simonpj at microsoft.com> wrote:

> Repro case is something like
> * Here is a source or files
> * Compile like this
> * Look at the generated Core...observe silly thing happening

Tried my best here:

https://gitlab.haskell.org/ghc/ghc/-/issues/20237

Any help on this would be much appreciated!

-- 
Regards,
Mike