[GHC] #2289: Needless reboxing of values when returning from a tight loop

[GHC]

#2289: Needless reboxing of values when returning from a tight loop
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        Reporter:  dons              |            Owner:
            Type:  bug               |           Status:  new
        Priority:  lowest            |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  6.8.2
      Resolution:                    |         Keywords:  boxing, loops,
Operating System:  Unknown/Multiple  |  performance
 Type of failure:  Runtime           |     Architecture:  Unknown/Multiple
  performance bug                    |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #2387,#1600
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Comment (by simonpj):

 In fact it's orthogonal to do with loopification, which does not affect
 allocation.  Its to do with nested CPR analysis, which I'm longing to do
 but keep getting diverted.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2289#comment:36>
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