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
subsitution correctly for at least .ll and .st files. There's still a long
way to go (i.e. this isn't worth of review yet).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15728 91177308-0d34-0410-b5e6-96231b3b80d8