[llvm] [LV] Disable fold tail by masking - when induction vars used outside (PR #81609)

[Florian Hahn via llvm-commits]

fhahn wrote:

> Thanks @fhahn for the reviews. Great that you mentioned the Phabricator patch, the test looks good and I copied here. As you suggested, created new pr for the test case with default behavior([niwinanto at 33ec308](https://github.com/niwinanto/llvm-project/commit/33ec3081832a950369ced6d1e8913ac771e689de)) and then updated this pr. However, I messed with the git workflow(I think). Could you please take a look, this is what you intended.

Yeah that looks good, I'll add a few small additional comments. But best to create a separate PR to just add the test case showing the issue first.


https://github.com/llvm/llvm-project/pull/81609