[GHC] #8308: Resurrect ticky code for counting constructor arity

[GHC]

#8308: Resurrect ticky code for counting constructor arity
-------------------------------------+-------------------------------------
        Reporter:  jstolarek         |                   Owner:  mlen
            Type:  task              |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Profiling         |                 Version:  7.7
      Resolution:                    |                Keywords:  newcomer
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Other             |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  D931
-------------------------------------+-------------------------------------
Changes (by mlen):

 * status:  new => patch
 * differential:   => D931


Comment:

 Sorry for the long delay. Finally I found some time (during ZuriHac) to
 rework the patch to include tests that the code is really generated and
 created the differential.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8308#comment:8>
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