[GHC] #7940: Building GHC 7.7.20130526 (perf) for Windows x86_64 fails with Cmm lint error

[GHC]

#7940: Building GHC 7.7.20130526 (perf) for Windows x86_64 fails with Cmm lint
error
-------------------------------+--------------------------------------------
    Reporter:  awson           |       Owner:                     
        Type:  bug             |      Status:  new                
    Priority:  normal          |   Milestone:                     
   Component:  Compiler        |     Version:  7.7                
    Keywords:                  |          Os:  Windows            
Architecture:  x86_64 (amd64)  |     Failure:  Building GHC failed
  Difficulty:  Unknown         |    Testcase:                     
   Blockedby:                  |    Blocking:                     
     Related:                  |  
-------------------------------+--------------------------------------------

Comment(by thoughtpolice):

 Out of curiosity I spent 30 minutes or so eyeing this. I think I see
 what's going on here (hopefully!) I'll get a Win64 build machine up soon
 to test and push a fix.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7940#comment:4>
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