[InstCombine] allow icmp-xor folds for vectors (PR33138)

This fixes the first part of:
https://bugs.llvm.org/show_bug.cgi?id=33138

More work is needed for the bitcasted variant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303660 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed