[GHC] #14259: Worker/Wrapper for sum return

[GHC]

#14259: Worker/Wrapper for sum return
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        Reporter:  jheek             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  UnboxedSums,
                                     |  CPRAnalysis, DemandAnalysis
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12364            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by andrewthad):

 Is there a merge request or differential with Sebastian's work?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14259#comment:8>
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