[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 Simon Marlow <marlowsd@…>):

 In [changeset:"43b3bab38eafef8c02a09fb4ff1e757f5cba6073/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="43b3bab38eafef8c02a09fb4ff1e757f5cba6073"
 Rts: Consistently use StgWord for sizes of bitmaps

 A long debate is in issue #8742, but the main motivation is that this
 allows for applying a patch to reuse the function scavenge_small_bitmap
 without changing the .o-file output.

 Similarly, I changed the types in rts/sm/Compact.c, so I can create
 a STATIC_INLINE function for the redundant code block:

         while (size > 0) {
             if ((bitmap & 1) == 0) {
                 thread((StgClosure **)p);
             }
             p++;
             bitmap = bitmap >> 1;
             size--;
         }
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8742#comment:17>
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