[llvm] LoopInfo: introduce Loop::getLocStr; unify debug output (PR #93051)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> > > Can you add a test showing how the new debug info location is printed for new users?
> > 
> > 
> > This is done in #93208.
> 
> But that's separate from this patch, right? Still would be good to have a test here to check the behavior of the patch, could also be in LAA

Not sure I follow. Isn't the debug location unstable (it's "<stdin>" or "<filename>" depending on whether the file was piped or if the file was passed in directly)?

I show the extra printed line in https://github.com/llvm/llvm-project/pull/93051/files#diff-691737e76443e1b38359d80e09fa9ad0cd14fd51ab4cc061d876604978fa4e2eR20-R21.

https://github.com/llvm/llvm-project/pull/93051