Added preliminary transfer function support for '==' and '!='.

Made some internal API cleanups with creating ConcreteInt values, which lead to
some code reduction in implementing "++", "--".



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46528 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed