IR: Appease MSVC after r280107 with an & or two
IR: Appease MSVC after r280107 with an & or two

Fixes the bot:
http://lab.llvm.org:8011/builders/clang-x64-ninja-win7/builds/15192

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@280116 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit b161c80b89d7fe2f9365f983a8dd5ee4c1a50ca3)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm