Don't warn about unreachable code if the block starts with __builtin_unreachable().

The next step is to warn if a block labeled unreachable is, in fact, reachable. Somewhat related to PR810.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109487 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed