- cleaned up lexical scanner
- added support for "lang.optN" configuration items
- added temporary file support (ala lib/System)
- corrected logic for deciding which phases to run
- consolidated the Action and ActionPattern classes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15765 91177308-0d34-0410-b5e6-96231b3b80d8
understand recursive descent parser, we can easily handle more syntax
variety, and we can more easily change the configuration items accepted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15732 91177308-0d34-0410-b5e6-96231b3b80d8