[llvm] [LV] Use VPReductionRecipe for partial reductions (PR #144908)

[Sam Tebbs via llvm-commits]

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@@ -2201,6 +2200,8 @@ class VPReductionPHIRecipe : public VPHeaderPHIRecipe,
         RdxDesc(RdxDesc), IsInLoop(IsInLoop), IsOrdered(IsOrdered),
         VFScaleFactor(VFScaleFactor) {
     assert((!IsOrdered || IsInLoop) && "IsOrdered requires IsInLoop");
+    assert(((!IsInLoop && !IsOrdered) || VFScaleFactor == 0) &&
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SamTebbs33 wrote:

Sounds good, done.

https://github.com/llvm/llvm-project/pull/144908