[GHC] #15840: Inline data constructor wrappers very late

[GHC]

#15840: Inline data constructor wrappers very late
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        Reporter:  aspiwack          |                Owner:  (none)
            Type:  feature request   |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.7
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:  16288             |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/325/
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Comment (by simonpj):

 Are there any regression tests?   Eg RULEs that match on data constructors
 that have interesting wrappers?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15840#comment:6>
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