#2940: Do CSE after CorePrep -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: lowest | Milestone: 8.0.1 Component: Compiler | Version: 6.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): I did? Oh dear. It must have been before I started to dislike CSE very much, because it gets in the way of rules, and can creasing sharing (e.g. by cse’ing `[0..1000]`). Or maybe it was precisely when I startd to dislike CSE... :-) Speaking about the phases CSE should happen: I very much believe we need a CSE phase as an Stg-to-Stg-transformation, to avoid reallocating `Left`s in the code for a `Either`’s `fmap`, for example. (There is a ticket for this, cannot find it right now.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/2940#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler