[GHC] #9238: Negative zero broken

[GHC]

#9238: Negative zero broken
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        Reporter:  augustss                     |            Owner:
            Type:  bug                          |           Status:  new
        Priority:  normal                       |        Milestone:
       Component:  Compiler                     |          Version:  7.8.2
      Resolution:                               |         Keywords:
Operating System:  Windows                      |     Architecture:
 Type of failure:  Incorrect result at runtime  |  Unknown/Multiple
       Test Case:                               |       Difficulty:
        Blocking:                               |  Unknown
                                                |       Blocked By:
                                                |  Related Tickets:
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Comment (by ezyang):

 Appears to be a regression from 7.6.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9238#comment:2>
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