#13104: runRW# ruins join points -------------------------------------+------------------------------------- Reporter: lukemaurer | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler | Version: 8.1 Resolution: | Keywords: JoinPoints 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: | -------------------------------------+------------------------------------- Changes (by akio): * cc: akio (added) Comment: Would it be possible to reimplement `runRW#` as a magic function with a compulsory unfolding, so that `runRW# f` expands to the following? {{{#!hs join $j s = f s {-# NOINLINE $j #-} in jump $j realWorld# }}} This would not only close this ticket but also allow other optimizations like pushing a `case` into the body of `f`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13104#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler