[GHC] #8885: Add inline versions of clone array primops

[GHC]

#8885: Add inline versions of clone array primops
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        Reporter:  tibbe             |            Owner:  simonmar
            Type:  feature request   |           Status:  patch
        Priority:  normal            |        Milestone:
       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 simonmar):

 The bug is in the primop.  The out-of-line implementation doesn't have the
 bug: look for `MAYBE_GC()`, that's the heap-overflow check.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8885#comment:7>
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