[GHC] #10225: GHC does not specialize based on type equality

[GHC]

#10225: GHC does not specialize based on type equality
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        Reporter:  yongqli           |                Owner:
            Type:  feature request   |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
      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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Changes (by thomie):

 * status:  new => infoneeded
 * failure:  None/Unknown => Runtime performance bug


Comment:

 yongqli: can you supply a test case? Thanks.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10225#comment:3>
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