Dan Gohman 1146728bfa Actually recycle SDNode allocations. SelectionDAG is using
RecyclingAllocator, but this change is needed for the nodes
to actually be recycled. This cuts SelectionDAG's memory
usage high-water-mark in half in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55351 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-26 01:44:34 +00:00
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