- Move tests only exercising instsimplify to instsimplify's apint-or.ll
- Actually test the CHECK lines in instsimplify's apint-or.ll
- Merge the remaining tests in apint-or1.ll and apint-or2.ll, use FileCheck
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247045 91177308-0d34-0410-b5e6-96231b3b80d8