[llvm] [LoopInterchange] Relax the legality check to accept more patterns (PR #139690)

[Ryotaro Kasuga via llvm-commits]

kasuga-fj wrote:

Thanks!

> Using GitHub's PR workflow [is not required](https://llvm.org/docs/GitHub.html#landing-your-change). Once it is accepted, you can push your patch using
> 
> ```
> git merge --squash origin/main # Squash all commits into one
> git commit --amend # Use the commit message from the PR summary; add "closes #118267" so GitHub can link it to the original PR
> 
> git push origin HEAD:main -n
> # confirm that it would push what you want
> git push origin HEAD:main
> ```

I didn't know that I can push directly to the main branch.


https://github.com/llvm/llvm-project/pull/139690