refactor some code, adding a new getLabelMap() accessor method
so that clients can't poke the function-local one when they really
want the current block label.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69463 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed