[GHC] #13908: sameMutableArray equivalent for Array

[GHC]

#13908: sameMutableArray equivalent for Array
-------------------------------------+-------------------------------------
        Reporter:  winter            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 I believe that should be fine. Afterall, `sameMutableArray#` is really
 just a pointer comparison.

 However, you are right that we probably ought to have a primop for this.
 I'm not sure why this was overlooked.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13908#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler