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

[GHC]

#1600: Optimisation: CPR the results of IO
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        Reporter:  simonmar          |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  lowest            |            Milestone:
       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 Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > it fails to transform some cases I would like it to.

 Can you give some specific programs that you would like to be optimised
 and aren't?  A list of specific examples would help to make sure that
 everyone on this thread was talking about the same things.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1600#comment:70>
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