[GHC] #5996: fix for CSE

[GHC]

#5996: fix for CSE
---------------------------------+------------------------------------------
    Reporter:  michalt           |       Owner:  simonpj                
        Type:  bug               |      Status:  patch                  
    Priority:  normal            |   Milestone:  7.8.1                  
   Component:  Compiler          |     Version:  7.5                    
    Keywords:                    |          Os:  Unknown/Multiple       
Architecture:  Unknown/Multiple  |     Failure:  Runtime performance bug
  Difficulty:  Unknown           |    Testcase:                         
   Blockedby:                    |    Blocking:                         
     Related:                    |  
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Comment(by ian@…):

 commit cfe92a8f8482a3c863c3bddc4be894b09fb972ff
 {{{
 Author: Ian Lynagh <ian at well-typed.com>
 Date:   Thu Jun 6 17:55:35 2013 +0100

     Remove old representation of CSEnv; part of #5996

  compiler/coreSyn/CoreUtils.lhs |   80
 ----------------------------------------
  compiler/simplCore/CSE.lhs     |   72
 +-----------------------------------
  2 files changed, 1 insertions(+), 151 deletions(-)
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5996#comment:7>
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