[GHC] #9344: takeWhile does not participate in list fusion

[GHC]

#9344: takeWhile does not participate in list fusion
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              Reporter:  dfeuer      |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:              |           Version:  7.8.3
  libraries/base                     |          Keywords:
            Resolution:              |  Operating System:  Unknown/Multiple
Differential Revisions:              |   Type of failure:  Runtime
          Architecture:              |  performance bug
  Unknown/Multiple                   |         Test Case:
            Difficulty:  Unknown     |          Blocking:
            Blocked By:              |
       Related Tickets:              |
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Comment (by nomeata):

 > I have some idea to make the translate/untranslate dance generic (and
 thus reliably usable by people wanting list fusion for their own
 functions) but I’ll ponder it some more.

 I have pondered them some more, but they didn’t work out so far.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9344#comment:4>
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