[GHC] #11179: Allow plugins to access "dead code"

[GHC]

#11179: Allow plugins to access "dead code"
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        Reporter:  lerkok            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Rather than mess with `simpleOptPgm` I think it might be better just to
 ask the occurrence analyser (which `simplOptPgm` uses) not to drop dead
 code, at least not at top level.  Tha can't be hard.  Just pass a boolean
 into `occAnalBind`.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11179#comment:9>
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