[GHC] #4937: Remove indirections caused by sum types, such as Maybe

[GHC]

#4937: Remove indirections caused by sum types, such as Maybe
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    Reporter:  tibbe             |        Owner:              
        Type:  feature request   |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  7.0.1       
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by tibbe):

 After a discussion on IRC Simon M pointed out that we cannot actually
 remove the indirection i.e. turning `Just Int` into a pointer to an
 `Int#`, as everything on the heap needs to be tagged.

 I'm closing this ticket as this doesn't seem feasible at the moment.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4937#comment:7>
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