[GHC] #5941: Add compilation stage plugins

[GHC]

#5941: Add compilation stage plugins
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        Reporter:  tibbe             |                   Owner:
            Type:  feature request   |                  Status:  infoneeded
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.4.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Changes (by adamgundry):

 * cc: adamgundry (added)


Comment:

 I've felt for a while that there should be better integration between
 [wiki:Plugins/TypeChecker plugins] and [wiki:Ghc/Hooks hooks], so that a
 plugin could hook into more stages of the compilation pipeline, and that
 hooks could register typechecker plugins. But I don't have a clear design
 yet, nor any spare cycles to work on this at the moment.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5941#comment:7>
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