Implement -Wsign-compare, or at least the actual comparison part of it.
Conditional operands are next.

Fixes part of rdar://problem/7289584.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86083 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed