[GHC] #5801: Document GHC Optimisation Passes

[GHC]

#5801: Document GHC Optimisation Passes
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    Reporter:  dterei            |       Owner:  dterei           
        Type:  task              |      Status:  new              
    Priority:  normal            |   Milestone:  7.6.1            
   Component:  Documentation     |     Version:                   
    Keywords:                    |          Os:  Unknown/Multiple 
Architecture:  Unknown/Multiple  |     Failure:  Documentation bug
  Difficulty:  Unknown           |    Testcase:                   
   Blockedby:                    |    Blocking:                   
     Related:                    |  
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Comment(by dterei):

 OK so more update, documented '''-fregs-graph''' and '''-fregs-
 iterative''' plus improved others. Just the DPH flags remain.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5801#comment:10>
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