[llvm] [clang] [clang-tools-extra] [VPlan] Introduce VPSingleDefRecipe. (PR #77023)

[via cfe-commits]

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@@ -819,10 +812,77 @@ class VPRecipeBase : public ilist_node_with_parent<VPRecipeBase, VPBasicBlock>,
   }                                                                            \
   static inline bool classof(const VPRecipeBase *R) {                          \
     return R->getVPDefID() == VPDefID;                                         \
+  }                                                                            \
+  static inline bool classof(const VPSingleDefRecipe *R) {                     \
+    return R->getVPDefID() == VPDefID;                                         \
   }
 
+/// VPSingleDef is a base class for recipes for modeling a sequence of one or
+/// more output IR that define a single result VPValue.
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ayalz wrote:

/// Note that VPRecipeBase must be inherited from before VPValue.

https://github.com/llvm/llvm-project/pull/77023