[GHC] #14223: Casts get in the way of join points

[GHC]

#14223: Casts get in the way of join points
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > Loopification works on the top level as well, and then go can
 potentially be inlined

 Ok but only if it's small.

 Perhaps float-in should be quite aggressive and float even top-level
 bindings inward (albeit perhaps not through a a lambda):
 {{{
 rec f = ..f...
 nonrec h = ..f..

 ===

 nonrec h = ...(letrec f = ...f... in f)...
 }}}
 That would do the job here.  Then maybe the final float-out pass can be a
 bit mor eager about floating things to top level

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14223#comment:6>
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