[GHC] #8590: Reduce code size of CAFs

[GHC]

#8590: Reduce code size of CAFs
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       Reporter:  parcs             |             Owner:  parcs
           Type:  feature request   |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler (NCG)    |           Version:  7.7
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 The size of each CAF could be reduced by moving the code that allocates
 the blackhole indirection closure out from the CAF's closure body and into
 `newCAF`. This saves around 50 bytes of object code per CAF.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8590>
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