[GHC] #3138: Returning a known constructor: GHC generates terrible code for cmonad

[GHC]

#3138: Returning a known constructor: GHC generates terrible code for cmonad
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  6.10.1
      Resolution:                    |             Keywords:
                                     |  DemandAnalysis
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by simonpj):

 * keywords:   => DemandAnalysis


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3138#comment:20>
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