[GHC] #1600: Optimisation: CPR the results of IO

[GHC]

#1600: Optimisation: CPR the results of IO
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        Reporter:  simonmar          |                   Owner:
            Type:  task              |                  Status:  new
        Priority:  lowest            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  6.6.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #8598             |  Differential Revisions:
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Comment (by nomeata):

 I do not know how much the code changed in master... just give it a try!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1600#comment:48>
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