[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 simonpj):

 > So the plan would be to experiment with a specializer that works also
 for non-recursive functions.

 That idea is pursued in #14844.

 But I'd still like to be be sure that this is truly the reason for the
 regression.  We have comment:27 which shows a regession for `x2n1` (is it
 the only regression?).  Then comment:28 says "maybe it's this".  But we
 have no concrete evidence for what the `x2n1` regression really is.  It'd
 be good to know.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14068#comment:44>
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