[InstSimplify][ConstantFolding] Add test demonstrating failure to simplify (icmp eq null, inttoptr x) when the null is on the left hand side. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304474 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed