[GHC] #13044: make it possible to apply GHC rewrite rules to class methods

[GHC]

#13044: make it possible to apply GHC rewrite rules to class methods
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           Reporter:  George         |             Owner:
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Make it possible to apply GHC rewrite rules to class methods. As Conal
 wrote in a discussion on glasgow-haskell-users, it is too bad that we
 can't use class laws as optimizations in the form of rewrite rules. In
 that same thread Simon PJ referenced
 https://ghc.haskell.org/trac/ghc/ticket/11688, esp comment:7 which gives
 links to similar examples.  https://ghc.haskell.org/trac/ghc/ticket/10528
 comment:13  gives more background.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13044>
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