[GHC] #14790: eqTypeRep does not inline

[GHC]

#14790: eqTypeRep does not inline
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.1-alpha2
      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):  Phab:D4405
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by dfeuer):

 * status:  new => patch
 * differential:   => Phab:D4405


Comment:

 mpickering, it looks like writing the wrapper and marking it `INLINABLE`
 does the trick. I wish I had a better sense of ''why'' `INLINABLE` does
 that, but okay. I also don't really understand why this wrapper should be
 `INLINABLE`, whereas the wrappers GHC manufactures are `INLINE`. What
 difference merits that distinction? Nevertheless, I've updated the
 differential to use `INLINABLE` instead, and added some comments.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14790#comment:15>
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