Jakob Stoklund Olesen b0f8341b34 Merge isReachable into isBackedge.
Prefer using RPO.lookup() instead of RPO[] which can mutate the map.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184891 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-25 23:32:10 +00:00
..
2013-06-25 23:32:10 +00:00