[LoopPredication] Support ule, sle latch predicates

This is a follow up for the loop predication change 313981 to support ule, sle latch predicates.

Reviewed By: mkazantsev

Differential Revision: https://reviews.llvm.org/D38177

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315616 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed