Andrew Trick 5050a667f4 SchedDFS: Initial support for nested subtrees.
This is mostly refactoring, along with adding an instruction count
within the subtrees and ensuring we only look at data edges.

llvm-svn: 173420
2013-01-25 06:02:44 +00:00
..
2013-01-23 06:41:41 +00:00