InstSimplify: div %X, 0 -> undef

We already optimized rem %X, 0 to undef, we should do the same for div.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223919 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed