#10124: Simple case analyses generate too many branches -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.4 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #6135, #9661 | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): I'm all for doing both! * Try to avoid duplication in the first place (comment:6) * Recover sharing even if duplication happens, or the programmer wrote it (comment:10) Re comment:10, one could do it in Cmm, but I suspect it'd be better done in Core. Could be a variant of `Note [Combine identical alternatives]` in `SimplUtils`. Over to you, Ben. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10124#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler