[clang] [llvm] [SimplifyCFG] Not folding branch in loop header with constant iterations (PR #74268)

[via cfe-commits]

bcl5980 wrote:

AMDGPU can not unorll this case:

https://godbolt.org/z/4Pq3bnzTT

But the same code in X86 looks can unroll:

https://godbolt.org/z/zr8aTG1KW

We may need to continue debug on it.

https://github.com/llvm/llvm-project/pull/74268