[GHC] #5339: Data.Bits instances should use default shift instead of shiftL/shiftR

[GHC]

#5339: Data.Bits instances should use default shift instead of shiftL/shiftR
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    Reporter:  liyang            |       Owner:                         
        Type:  feature request   |      Status:  patch                  
    Priority:  normal            |   Component:  libraries/base         
     Version:  7.1               |    Keywords:                         
    Testcase:                    |   Blockedby:                         
          Os:  Unknown/Multiple  |    Blocking:                         
Architecture:  Unknown/Multiple  |     Failure:  Runtime performance bug
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Changes (by liyang):

 * cc: hackage.haskell.org@… (added)
  * status:  new => patch


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5339#comment:1>
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