[GHC] #14258: n-body runtime regressed badly due to CoreFVs patch

[GHC]

#14258: n-body runtime regressed badly due to CoreFVs patch
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           Reporter:  bgamari        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Runtime
  Unknown/Multiple                   |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 While looking through nofib numbers I noticed that `n-body` regressed in
 runtime by around 20% due to 751996e90a964026a3f86853338f10c82db6b610.
 Yikes!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14258>
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