[GHC] #2642: Improve SpecConstr for join points

[GHC]

#2642: Improve SpecConstr for join points
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 Reporter:  simonpj                   |          Owner:                  
     Type:  run-time performance bug  |         Status:  new             
 Priority:  normal                    |      Milestone:  6.10 branch     
Component:  Compiler                  |        Version:  6.8.3           
 Severity:  normal                    |     Resolution:                  
 Keywords:                            |     Difficulty:  Unknown         
 Testcase:                            |   Architecture:  Unknown/Multiple
       Os:  Unknown/Multiple          |  
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Changes (by igloo):

  * milestone:  => 6.10 branch

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2642#comment:1>
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