[llvm] [VPlan] Add VPInstruction to unpack vector values to scalars. (PR #155670)

[Florian Hahn via llvm-commits]

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@@ -2718,6 +2723,15 @@ class LLVM_ABI_FOR_TEST VPReductionRecipe : public VPRecipeWithIRFlags {
     return R && classof(R);
   }
 
+  static inline bool classof(const VPValue *VPV) {
+    const VPRecipeBase *R = VPV->getDefiningRecipe();
+    return R && classof(R);
+  }
+
+  static inline bool classof(const VPSingleDefRecipe *R) {
+    return classof(static_cast<const VPRecipeBase *>(R));
+  }
+
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fhahn wrote:

It's needed for this change, due to the new cast/dyn_cast/isa with VPSingleDefRecipe

https://github.com/llvm/llvm-project/pull/155670