[MustExecute] Shwo the effect of using full loop info variant

Most basic possible test for the logic used by LICM.

Also contains a speculative build fix for compiles which complain about a definition of a stuct K; followed by a declaration as class K;



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328058 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed