[llvm] [LV] Improve the test coverage for strided access. nfc (PR #155981)

[Mel Chen via llvm-commits]

================
@@ -729,3 +1417,213 @@ loop:
 exit:
   ret void
 }
+
+define void @constant_stride_reinterpret(ptr noalias %in, ptr noalias %out) {
----------------
Mel-Chen wrote:

Updated the comment.
20c2aea0c4fa0a0e072694d5cff9c1fbc97aff1d

https://github.com/llvm/llvm-project/pull/155981