[LV] Refactor the validation of PHI inductions. NFC

This moves the validation of PHI inductions into a
separate method, making it easier to reuse this
logic.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268632 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed