Allow "source_filename" to be an optional argument (the client can provide NULL).  This allows the client to put the source_filename in the command_line_args without fear of the file being named twice.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89118 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed