Add verification to ensure we don't have redundant borrow scopes for @guaranteed forwarding phis
Add verification to ensure we don't have redundant borrow scopes for @guaranteed forwarding phis

roambotics/swift,roambotics/swift,apple/swift,roambotics/swift,roambotics/swift,apple/swift,roambotics/swift,apple/swift,apple/swift,apple/swift,roambotics/swift,apple/swift