Greatly simplify the logic in ExplodedGraphImpl::TrimGraph. Now we just do a vanilla reverse-BFS followed by a forward-DFS instead of resulting to strange histrionics (whose purpose I can no longer remember) in the reverse-BFS stage. This fixes an assertion failure in BugReporter due to edge cases where no root was being hit in the reverse-BFS phase.
Greatly simplify the logic in ExplodedGraphImpl::TrimGraph. Now we just do a
vanilla reverse-BFS followed by a forward-DFS instead of resulting to strange
histrionics (whose purpose I can no longer remember) in the reverse-BFS stage.
This fixes an assertion failure in BugReporter due to edge cases where no root
was being hit in the reverse-BFS phase.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@65160 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang