[GHC] #8742: Reuse scavenge_small_bitmap

[GHC]

#8742: Reuse scavenge_small_bitmap
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        Reporter:  Tarrasch          |            Owner:  Tarrasch
            Type:  task              |           Status:  patch
        Priority:  lowest            |        Milestone:  7.10.1
       Component:  Runtime System    |          Version:  7.6.3
      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 Tarrasch):

 Hi Simon,

 Did you have time to look at the "unification" patch I sent? I did not
 measure its change to performance and it will naturally change the output
 assembly (but I do not know if for better or for worse). I guess we take a
 risk that the GC becomes ''slightly'' slower with that patch. But if we do
 apply it we can safely apply the patch that follows.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8742#comment:16>
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