[CFG] Try to narrow down MSVC compiler crash via binary search.
[CFG] Try to narrow down MSVC compiler crash via binary search.

Split the presumably offending function in two to see which part of it causes
the crash to occur.

The crash was introduced in r325966.
r325969 did not help.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@325978 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang