[GHC] #8900: Strictness analysis regression

[GHC]

#8900: Strictness analysis regression
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        Reporter:  tibbe                    |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler                 |          Version:  7.8.1-rc2
      Resolution:                           |         Keywords:
Operating System:  MacOS X                  |     Architecture:  x86_64
 Type of failure:  Runtime performance bug  |  (amd64)
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by tibbe):

 I don't know what the right approach is. If we decide to keep the new
 behavior I'll have to be more careful about any extra evaluation, as I
 can't trust GHC to remove it.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8900#comment:16>
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