[llvm] [VPlan] Handle VPWidenCastRecipe without underlying value in EVL transform (PR #120194)

[Mel Chen via llvm-commits]

================
@@ -1058,6 +1058,125 @@ loop:
 exit:
   ret void
 }
+
+define void @truncate_to_minimal_bitwidths_widen_cast_recipe(ptr noalias %dst, ptr noalias %src, i32 %mvx) {
----------------
Mel-Chen wrote:

```suggestion
define void @truncate_to_minimal_bitwidths_widen_cast_recipe(ptr %dst, ptr %src, i32 %mvx) {
```

https://github.com/llvm/llvm-project/pull/120194