PR5863: Don't erase unreachable BBs which have an associated cleanup size.

This works around a crash where malloc reused the memory of an erased BB for a
new BB leaving old cleanup information pointing at the new block.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104472 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed