[GHC] #4945: Another SpecConstr infelicity

[GHC]

#4945: Another SpecConstr infelicity
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    Reporter:  batterseapower    |        Owner:                                
        Type:  bug               |       Status:  merge                         
    Priority:  normal            |    Milestone:                                
   Component:  Compiler          |      Version:  7.0.1                         
    Keywords:                    |     Testcase:  simplCore/should_compile/T4935
   Blockedby:                    |   Difficulty:                                
          Os:  Unknown/Multiple  |     Blocking:                                
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug       
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Changes (by simonpj):

  * status:  new => merge
  * testcase:  => simplCore/should_compile/T4935


Comment:

 Right.  I came to the same conclusion.
 {{{
 Mon Feb  7 10:25:37 GMT 2011  simonpj at microsoft.com
   * Fix Trac #4945: another SpecConstr infelicity

   Well, more a plain bug really, which led to SpecConstr
   missing some obvious opportunities for specialisation.

   Thanks to Max Bolingbroke for spotting this.

     M ./compiler/specialise/SpecConstr.lhs -21 +35
 }}}
 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4945#comment:4>
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