Carter Schonwald <carter.schonw...@gmail.com> writes: > Ccing ghc devs since that’s a better forum perhaps > Crazy theory: > > this is a regression due the the partial changes to pattern matching > coverage checking in 8.10 that finished / landed in ghc 9 > > Why: > Desugaring is when pattern/ case statement translation happens I think? > And the only obvious “big thing” is that you have some huge , albeit sane > for a compiler, pattern matching > > I’d first check if the new ghc 9 release doesn’t have that regression in > build time that you experienced. And if it does file a ticket. > > I may be totally wrong, but that seems like a decent likelihood !
You may be right! Another module that regressed is also mainly characterised by large-but-not-insane case expressions: https://github.com/diku-dk/futhark/blob/d0839412bdd11884d75a1494dd5de5191833f39e/src/Futhark/Optimise/Simplify/Rules.hs I'll try to split these modules up a little bit (I should have done so a while ago anyway) and maybe that will make the picture even clearer. -- \ Troels /\ Henriksen _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
