[llvm] Add option to print entire function instead of just the loops for loo… (PR #123229)

[Akshay Deodhar via llvm-commits]

akshayrdeodhar wrote:

> makes sense to me, but needs a test (e.g. llvm/test/Other/print-module-scope.ll for a similar one)

Added test.

https://github.com/llvm/llvm-project/pull/123229