[GHC] #8923: Add SmallArray# type

[GHC]

#8923: Add SmallArray# type
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        Reporter:  tibbe             |            Owner:  tibbe
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  7.9
      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 tibbe):

 Replying to [comment:5 simonpj]:
 > I have not been following the thread, but it seems surprising to add tow
 new types to `primpops.txt.pp` with no accompanying primpops to manipulate
 them.

 I just wanted some early feedback on the core of the implementation. I
 will add all the primops in the next step.

 > But the front-end changes (which amount only to adding stuff to
 `PrelNames` and `TysPrim`) look ok to me.

 Great, I will proceed with adding the primops and writing some tests.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8923#comment:6>
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