[GHC] #13090: Expose all unfoldings of overloaded functions by default

[GHC]

#13090: Expose all unfoldings of overloaded functions by default
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        Reporter:  mpickering        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2929
       Wiki Page:                    |
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Comment (by j.waldmann):

 As a user, yes, I would welcome an easy way to have "overloaded functions
 specialised at call sites".

 Attaching a pragma to each of them is not "easy", but a compiler option
 (per module, or per cabal project) is.

 If compile times/code sizes go up, so be it. It's a price to pay for
 faster executables.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13090#comment:2>
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