[llvm] [RISCV] Adjust RVV stack alignment by ABI (PR #101002)

[Craig Topper via llvm-commits]

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@@ -127,3 +135,8 @@ define void @caller(i32 %n) {
   call void @callee(ptr %1, ptr %2)
   ret void
 }
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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topperc wrote:

Why are we adding unused check-prefixes?

https://github.com/llvm/llvm-project/pull/101002