Simplify some of the code. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184172 91177308-0d34-0410-b5e6-96231b3b80d8
Remove dead prototype.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184173 91177308-0d34-0410-b5e6-96231b3b80d8
Fix nondeterminism in .gcno file generation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184174 91177308-0d34-0410-b5e6-96231b3b80d8