Specialisation doesn't kick in (RE: Instantiation of overloaded definition *in Core*)

[Erdi, Gergo]

INTERNAL

I see. That will be a bit more involved to try out, because I don't have a ModGuts at hand -- I only have the ModDetails, and the collected CoreProgram from the whole program. But it seems `specProgram` only really uses the rules and the binds from the `ModGuts`, so I should be all right. 

But one thing I can easily try is just printing the UsageDetails as returned by the specBinds part of specProgram, and that seems empty. So if the actual work of specProgram happens by generating rules in specImports, how will specImports know what rules to generate, from an empty UsageDetails?

-----Original Message-----
From: Matthew Pickering <matthewtpickering at gmail.com> 
Sent: Wednesday, October 6, 2021 4:24 PM
To: Erdi, Gergo <Gergo.Erdi at sc.com>
Cc: Simon Peyton Jones <simonpj at microsoft.com>; Montelatici, Raphael Laurent <Raphael.Montelatici at sc.com>; GHC <ghc-devs at haskell.org>
Subject: [External] Re: Specialisation doesn't kick in (RE: Instantiation of overloaded definition *in Core*)

I think you need to run at least one simplifier pass as the specialisations are applied via rules (created by specProgram).

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