[GHC] #14068: Loopification using join points

[GHC]

#14068: Loopification using join points
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        Reporter:  nomeata           |                Owner:  nomeata
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13966 #14067     |  Differential Rev(s):  Phab:D3811
  #14827                             |
       Wiki Page:                    |
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Comment (by nomeata):

 Hi Kavon,

 nice to see someone else working on this. With the ICFP deadline out of
 the way, I want to pick this up again.

 > as specialization and other optimizations end up turning a binder marked
 as RecursiveTailCalled into a a full join point, and we end up with better
 code.

 Can you elaborate?

 I noticed that the most regressions due to loopification are due to
 ConstSpec only targetting recursive things. Do you observe that as well?

 So the plan would be to experiment with a specializer that works also for
 non-recursive functions. Do you want to try that out?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14068#comment:43>
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