[llvm] [VPlan] Add cost for `VPWidenMemoryRecipe` (PR #105614)

[Florian Hahn via llvm-commits]

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@@ -2529,6 +2529,13 @@ class VPWidenMemoryRecipe : public VPRecipeBase {
     llvm_unreachable("VPWidenMemoryRecipe should not be instantiated.");
   }
 
+  /// Get element Type
+  Type *getElementType() const { return getLoadStoreType(&Ingredient); }
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fhahn wrote:

Simpler to just use `getLoadStoreType` directly in `::computeCost`, like other `getLoadStoreXXX` helpers there?

https://github.com/llvm/llvm-project/pull/105614