[x86] add test for add+not vector fold; NFC
  
The fold uses 'isBitwiseNot()', but that's not vector-friendly currently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342592 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed