[EarlyCSE] add tests for commuted min/max; NFC

See PR35642: https://bugs.llvm.org/show_bug.cgi?id=35642


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320530 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed