patch applied (ghc): Use the BF_EVACUATED flag to indicate to-space consistently

[Simon Marlow]

Wed Apr 16 16:29:06 PDT 2008  Simon Marlow <simonmarhaskell at gmail.com>
  * Use the BF_EVACUATED flag to indicate to-space consistently
  BF_EVACUATED is now set on all blocks except those that we are
  copying.  This means we don't need a separate test for gen>N in
  evacuate(), because in generations older than N, BF_EVACUATED will be
  set anyway.  The disadvantage is that we have to reset the
  BF_EVACUATED flag on the blocks of any generation we're collecting
  before starting GC.  Results in a small speed improvement.

    M ./rts/sm/Compact.c -5 +2
    M ./rts/sm/Evac.c -1 +1
    M ./rts/sm/Evac.c-inc -19 +9
    M ./rts/sm/GC.c -9 +6
    M ./rts/sm/GCAux.c -3
    M ./rts/sm/GCUtils.c -9 +1

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20080416232906-8214f-7ac46a9f8579d2e935539b67ed9a747d115e1050.gz