Teach MemRegion::getBaseRegion() about ObjCIvarRegions.  We want to treat
them the same way as fields.  This fixes a regression in RegionStore::RemoveDeadbindings()
that emerged from going to the cluster-based analysis.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100570 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed