[GHC] #4121: Refactor the plumbing of CafInfo to make it more robust

[GHC]

#4121: Refactor the plumbing of CafInfo to make it more robust
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              Reporter:  dterei      |            Owner:
                  Type:  task        |           Status:  new
              Priority:  low         |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  6.12.2
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * difficulty:   => Unknown
 * type:  bug => task
 * failure:  Building GHC failed => None/Unknown


Comment:

 The "horrible hack" is still there. This ticket is currently not listed on
 [wiki:Status/SLPJ-Tickets].

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4121#comment:9>
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