[GHC] #7307: Share top-level code for strings

[GHC]

#7307: Share top-level code for strings
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        Reporter:  simonpj           |            Owner:  parcs
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  7.6.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by parcs):

 Hah, that's a lot of bugs for such a small patch.

 Your first point seems to contradict the documentation at
 https://ghc.haskell.org/trac/ghc/browser/ghc/includes/rts/storage/Closures.h#L30,
 which says that the usage of `StgThunkHeader` doesn't apply to
 `THUNK_STATIC`s. Could you clarify this?

 It seems to me that I could have just given the `TopUnpack` infotable the
 `THUNK_STATIC` type instead of creating a new closure type. Would you be
 inclined to agree?

 Thanks for reviewing.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7307#comment:7>
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