[llvm] [LV] Use VPReductionRecipe for partial reductions (PR #147513)

[Gaëtan Bossu via llvm-commits]

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@@ -2378,32 +2395,21 @@ class VPReductionPHIRecipe : public VPHeaderPHIRecipe,
   /// The recurrence kind of the reduction.
   const RecurKind Kind;
 
-  /// The phi is part of an in-loop reduction.
-  bool IsInLoop;
-
-  /// The phi is part of an ordered reduction. Requires IsInLoop to be true.
-  bool IsOrdered;
-
-  /// When expanding the reduction PHI, the plan's VF element count is divided
-  /// by this factor to form the reduction phi's VF.
-  unsigned VFScaleFactor = 1;
+  RdxStyle Style;
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gbossu wrote:

This is nicer!

https://github.com/llvm/llvm-project/pull/147513