[GHC] #5171: Misfeature of Cmm optimiser: no way to extract a branch of expression into a separate statement

[GHC]

#5171: Misfeature of Cmm optimiser: no way to extract a branch of expression into
a separate statement
---------------------------------+------------------------------------------
    Reporter:  rtvd              |        Owner:                         
        Type:  feature request   |       Status:  new                    
    Priority:  normal            |    Milestone:  7.4.1                  
   Component:  Compiler          |      Version:  7.0.3                  
    Keywords:  Cmm optimisation  |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
---------------------------------+------------------------------------------
Changes (by igloo):

  * milestone:  => 7.4.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5171#comment:2>
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