[GHC] #14287: Early inlining causes potential join points to be missed

[GHC]

#14287: Early inlining causes potential join points to be missed
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        Reporter:  jheek             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by jheek):

 I’m not sure whether early inlining is really the issue here but it does
 seem to avoid it. I also found arity analysis to be important in this
 case.
 Would it make sense to (optionally) run the float out step only after a
 full simplify, arity, and simplify cycle?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14287#comment:2>
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