[LLVM-MCA][X86] Add some AVX512 tests

These are going to be necessary to check I don't mess up when I start cleaning up all the remaining vector integer overrides

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343414 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed