Fix -Werror when compiling rL318083 (ter)

Statically assert the result and remove a runtime comparison, a direct consequence of the optimization introduced in rL318083.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318091 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed