search for: strahler_number

...ve also searched the archives of this list. My question is: Is it possible to create a DAG from an llvm::Module? I would like to do this independent of a specific architecture using LLVM IR. In particular, I am interested in using a DAG to compute the Strahler number (http://en.wikipedia.org/wiki/Strahler_number) of the graph to determine the minimum number of register needed to evaluate an expression tree. I have read through the documentation on SelectionDAG. However, this seems to require a TargetMachine. Is there a way to create a graph without a target? This may be a fundamental lack of understand...