[llvm] [LV] Add initial support for vectorizing literal struct return values (PR #109833)

[Florian Hahn via llvm-commits]

================
@@ -9607,7 +9624,7 @@ void VPReplicateRecipe::execute(VPTransformState &State) {
             VectorType::get(UI->getType(), State.VF));
         State.set(this, Poison);
       }
-      State.packScalarIntoVectorValue(this, *State.Lane);
+      State.packScalarIntoWideValue(this, *State.Lane);
----------------
fhahn wrote:

Yep I think the potential issue @david-arm mentioned is similar to having vector functions that return multiple results as interleaved vector for example, where we lose some flexibility with the current schema in this patch. 

https://github.com/llvm/llvm-project/pull/109833