[DAGCombiner] fix variable names in isAlias(); NFCI

We started with zero-based params and switched to one-based locals...
Also, variables start with a capital and functions do not.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300854 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed