test: tweak inlined-allocs test

Remove pointless checks for storage of uninteresting values.  Ensure that we
perform basic alias analysis to make the test more correct.  Finally, apply a
stylistic change to the test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220839 91177308-0d34-0410-b5e6-96231b3b80d8