#14844: SpecConstr also non-recursive function -------------------------------------+------------------------------------- Reporter: nomeata | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.5 Resolution: | Keywords: SpecConstr Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): I stared some more at the code, and learned: * Currently, !SpecConstr does specialize local non-recursive functions, but not top-level non-recursive functions. Comment in the source code about that: “Oddly, we don't seem to specialise top-level non-rec functions”. This can be fixed in `scTopBind`. * Together with loopification, SpecConstr only specialized everything as before if it is run twice, with a simplification in between. Otherwise, it refuses to specialize the outer non-recursive function because it does not see that its parameters are being scrutinized. I hope this can somehow be fixed in `SpecConstr`, so that it anticipates the state after simplifications. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14844#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler