Functions containing control flow are now inlined and incrementally extend the graph in SSA form. For the special case of a function with only one exit, we locally update the dominator tree. If multiple exits occur, we currently recompute the dominator tree for the full resulting graph.
Review URL: https://codereview.chromium.org//10967007
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12990 260f80e4-7a28-3924-810f-c04153c831b5