[GHC] #14855: Implementation of liftA2 for Const has high arity

[GHC]

#14855: Implementation of liftA2 for Const has high arity
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        Reporter:  lyxia             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  8.2.2
      Resolution:                    |             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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Comment (by simonpj):

 I think you'll get the same code in all these cases, but you could
 `-ddump-simpl` to check.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14855#comment:4>
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