[GHC] #4928: Add primops for copying/cloning an array

[GHC]

#4928: Add primops for copying/cloning an array
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    Reporter:  tibbe             |       Owner:                
        Type:  feature request   |      Status:  new           
    Priority:  normal            |   Component:  Runtime System
     Version:  7.0.1             |    Keywords:                
    Testcase:                    |   Blockedby:                
          Os:  Unknown/Multiple  |    Blocking:                
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown  
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Comment(by tibbe):

 I've attached a patch (that depends on arraycopy.dpatch) that adds some
 basic tests for the primops.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4928#comment:4>
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