This test case demonstrates that common subexpression elimination takes place
between code sequences for materialising constants. In particular, it
demonstrates that redundant lui aren't generated. This would capture a
regression if applying a patch such as D41949.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330291 91177308-0d34-0410-b5e6-96231b3b80d8
