[GHC] #14223: Casts get in the way of join points

[GHC]

#14223: Casts get in the way of join points
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 BTW, https://ghc.haskell.org/trac/ghc/wiki/SequentCore should explain why
 casts are not considered tail-calls. Because they certainly look like
 tail-calls after type erasure… and if they were, this here would be a non-
 issue.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14223#comment:7>
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