[clang] [llvm] [OpenMP] Diagnostic check for imperfect loop collapse (PR #96087)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> Can you explain why the critical section version of the code is safe, and why it is an improvement over simply not collapsing the loop?

1. I'm not saying it is safe, I'm just saying that something like this might be safe
2. Without properly collapsing the loops, the compiler won't be able to properly schedule the execution per programmer's request

https://github.com/llvm/llvm-project/pull/96087