[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 Simon Peyton Jones <simonpj@…>):

 In [changeset:"900cfdc2700ad9e8c7a12dd25bb0396e5e7651df/ghc"
 900cfdc2/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="900cfdc2700ad9e8c7a12dd25bb0396e5e7651df"
 Do not generate a data-con wrapper for !Int#

 See Note [Data con wrappers and unlifted types] in MkId.
 We were being totally stupid!

 See Trac #1600 comment:66
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1600#comment:67>
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