patch applied (ghc): Fix bug in cast optimisation; fixes Trac #995

Simon Peyton Jones <[email protected]>
Newsgroups gmane.comp.lang.haskell.cvs.all
Message-ID <20070103153723.GA9601__25970.9317856052$1167838793$gmane$org@cvs.haskell.org> 
Wed Jan  3 07:35:30 PST 2007  [email protected]
  * Fix bug in cast optimisation; fixes Trac #995
  
  There was a plain bug in the cast-optimiation code -- a call to
  splitCoercionKind_maybe instead of coercionKind!  Result was that
  we missed useful opportunities to move casts around.  Trac #995
  is an example, but I bet there are more.
  

    M ./compiler/simplCore/Simplify.lhs -13 +14
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