[GHC] #3843: Merge plugins into HEAD

[GHC]

#3843: Merge plugins into HEAD
---------------------------------+------------------------------------------
    Reporter:  dreixel           |        Owner:  simonpj     
        Type:  task              |       Status:  merge       
    Priority:  high              |    Milestone:  7.2.1       
   Component:  Compiler          |      Version:  6.13        
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------

Comment(by thoughtpolice):

 Sorry for making this ticket bigger, but I've also added documentation to
 the users guide for `reinitializeGlobals` on my ghc branch here:

 https://github.com/thoughtpolice/ghc/tree/plugin-docs-reinit-globals

 Relevant commit:

 https://github.com/thoughtpolice/ghc/commit/2419ff534ea8d30febb69a05fb9026d0d4473694

 Max, Ian: if one of you could at least merge this to master, that would be
 awesome. If Max's `reinitializeGlobals` change makes it into the 7.2
 branch, I'd highly advise this be merged to so people can be aware of this
 issue.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3843#comment:55>
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