[llvm] [VPlan] Impl VPlan-based pattern match for ExtendedRed and MulAccRed (PR #113903)

[Sander de Smalen via llvm-commits]

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@@ -181,6 +182,13 @@ struct VPlanTransforms {
   /// CanonicalIVTy as type for all un-typed live-ins in VPTypeAnalysis.
   static void convertToConcreteRecipes(VPlan &Plan, Type &CanonicalIVTy);
 
+  /// This function converts initial recipes to the abstract recipes and clamps
+  /// \p Range based on cost model for following optimizations and cost
+  /// estimations. The converted abstract recipes will lower to concrete
+  /// recipies before codegen.
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sdesmalen-arm wrote:

```suggestion
  /// recipes before codegen.
```

https://github.com/llvm/llvm-project/pull/113903