Teach debug-info generation that SourceManager::getPresumedLoc() can
produce an invalid location even when given a valid location, if the
file system has changed underneath us. Recovery more gracefully.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118834 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed