The type argument to LitRubbish should be a fixed RuntimeRep. If it is not, you can file a bug. I have fixed a related bug in f435d55fe969e7.
Krzysztof On Thu, Sep 15, 2022 at 1:12 PM Csaba Hruska <csaba.hru...@gmail.com> wrote: > > I've investigated a bit more. You are right `typeHasFixedRuntimeRep` works > fine, the panic was caused by querying the representation type of > `LitRubbish` type argument. In some cases `getRuntimeRep` causes GHC panic > for `LitRubbish` type arguments. > I did solve the issue with special casing the LitRubbish type argument > handling by using only the `runtimeRepPrimRep` function. In the general case > I tested the type with `isUnboxedTupleType` and `isUnboxedSumType` which rely > on `getRuntimeRep`. > Thanks for the tips and feedback. > Regards, > Csaba > > On Wed, Sep 14, 2022 at 6:44 PM Sam Derbyshire <sam.derbysh...@gmail.com> > wrote: >> >> Hmm, that's strange, both isTypeLevPoly and typeHasFixedRuntimeRep have the >> same precondition: the kind of the type is of the form TYPE rep. So they >> should panic in the same circumstances. Can you give a bit more information? >> What panics are you running into? >> >> On Wed, 14 Sept 2022 at 18:40, Csaba Hruska <csaba.hru...@gmail.com> wrote: >>> >>> Hi, >>> Thanks for the tip, I've tried it and it behaves differently than >>> isTypeLevPoly. I can get panic when querying the reptype for fixed >>> reptypes. That means isTypeLevPoly semantically is not the same as the >>> negated result of typeHasFixedRuntimeRep. >>> >>> On Wed, 14 Sep 2022, 18:19 Sam Derbyshire, <sam.derbysh...@gmail.com> wrote: >>>> >>>> Hi Csaba, >>>> >>>> I think you want the function typeHasFixedRuntimeRep from GHC.Core.Type. >>>> >>>> Best, >>>> >>>> Sam >>>> >>>> On Wed, 14 Sept 2022 at 18:12, Csaba Hruska <csaba.hru...@gmail.com> wrote: >>>>> >>>>> Hello GHC Devs, >>>>> >>>>> I've noticed that the `isTypeLevPoly` function has been removed from GHC >>>>> since 9.4. >>>>> I used it to decide the validity of querying the representation type of >>>>> every value in the STG IR. >>>>> It was mandatory to prevent GHC panics, because there are a lot of >>>>> partial functions in GHC. >>>>> Is there an alternative to `isTypeLevPoly` in GHC 9.4? >>>>> >>>>> Best regards, >>>>> Csaba Hruska >>>>> _______________________________________________ >>>>> ghc-devs mailing list >>>>> ghc-devs@haskell.org >>>>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
