[llvm] jf[CodeGen] Test LICM behaviour on loop invariant loads. (PR #165025)

[Mikhail Gudim via llvm-commits]

mgudim wrote:

@fhanh I would like to go back to these:

https://github.com/llvm/llvm-project/pull/95632
https://github.com/llvm/llvm-project/pull/95877
https://github.com/llvm/llvm-project/pull/92959

and try to finish it.

https://github.com/llvm/llvm-project/pull/165025