the BasicBlock class where they should be. pred_begin/pred_end become methods on BasicBlock,
and the cfg namespace isn't used anymore.
Also pull Interval stuff into the Interval class out of the global namespace
llvm-svn: 690
is recoded to use IntervalIterators. IntervalIterators can now maintain
their own memory or let an external entity do it.
Loop depth is a new user of IntervalPartition for calculating the loop
nesting depth of a basic block
TODO: add IntervalPartition capability to split intervals between the looping
portion and the "tail" portion.
llvm-svn: 69
