[GHC] #13689: Data.Either doesn't export INLINABLE short functions like "rights"

[GHC]

#13689: Data.Either doesn't export INLINABLE short functions like "rights"
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        Reporter:  varosi            |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect API     |  Unknown/Multiple
  annotation                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3576
       Wiki Page:                    |
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Changes (by bgamari):

 * differential:   => Phab:D3576


Comment:

 > INLINEABLE might be reasonable. Isn’t it the case that the unfolding
 stored in the interface will be the un-optimized one .

 Yes.

 > (i.e. not the large thing visible up there?)

 No :)

 The large thing visible here is the desugared Core (`-ddump-ds`); no
 simplification has happened. It just so happens that list comprehensions
 are directly desugared into fusion primitives and consequently produce
 rather large Core.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13689#comment:10>
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