Move ExplodedNode reclaimation out of ExprEngine and into CoreEngine.  Also have it based on adding predecessors/successors, not node allocation.  No measurable performance change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150720 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed