Use llvm::BitVector instead of managing memory by hand.
 - As it happens, this also fixes a use-of-uninitialized memory that was causing
   non-deterministic test failures.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76857 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed