Per discussion with Ted, the 'FromSuper'/'FromSub' logic is invalid. Simplify the code to standard worklist algorithm. Always add both sub and super  regions of live regions.
Per discussion with Ted, the 'FromSuper'/'FromSub' logic is invalid. Simplify
the code to standard worklist algorithm. Always add both sub and super 
regions of live regions.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@84323 91177308-0d34-0410-b5e6-96231b3b80d8

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