[GHC] #7674: Separate StablePtr table from StableName table.

[GHC]

#7674: Separate StablePtr table from StableName table.
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    Reporter:  EyalLotem                               |       Owner:                  
        Type:  task                                    |      Status:  patch           
    Priority:  normal                                  |   Milestone:                  
   Component:  Runtime System                          |     Version:  7.6.2           
    Keywords:  rts stable_ptr stable_name performance  |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple                        |     Failure:  None/Unknown    
  Difficulty:  Unknown                                 |    Testcase:                  
   Blockedby:                                          |    Blocking:                  
     Related:                                          |  
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Changes (by simonmar):

  * difficulty:  => Unknown


Comment:

 I'm afraid something is broken with `StableName`s in your patch: test
 `memo001` in `libraries/base` fails for me (this is a stress test for
 `StableName`s, it isn't run by default in validate, but it should be).

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7674#comment:6>
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