Restructure CFG builder to have just one visitor path instead of two. The result is an algorithm that is much easier to understand and slightly more efficient. Thanks to Mike Stump for our discussions on the CFGBuilder and his comments that helped prompt this long needed cleanup.
Restructure CFG builder to have just one visitor path instead of two. The result
is an algorithm that is much easier to understand and slightly more efficient.
Thanks to Mike Stump for our discussions on the CFGBuilder and his comments that
helped prompt this long needed cleanup.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@76250 91177308-0d34-0410-b5e6-96231b3b80d8

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