[llvm] [DA] Rewrite the formula in the Strong SIV test (PR #179665)

[Ehsan Amiri via llvm-commits]

https://github.com/amehsan commented:

Please add me as reviewer to DA patches as I am actively involved in the discussion.

Also please provide your justification for correctness of your patch.

https://github.com/llvm/llvm-project/pull/179665