[CodeGen] clean up and add tests for scalar and-of-setcc; NFC

https://bugs.llvm.org/show_bug.cgi?id=32401


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299034 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed