[GHC] #12900: Common up identical info tables

[GHC]

#12900: Common up identical info tables
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        Reporter:  dobenour          |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 Maybe start by measuring the total code size used by constructors (say in
 the `ghc` library itself). Slightly tricky because the starts of info
 tables aren't marked by symbols, I think.

 I'd be surprised if they account for more than about 10% of the total code
 size, myself.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12900#comment:5>
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