[llvm] [VPlan] Replace RdxDesc with RecurKind in VPReductionPHIRecipe (NFC). (PR #142322)

[via llvm-commits]

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@@ -9177,6 +9173,8 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
       if (CM.blockNeedsPredicationForAnyReason(CurrentLinkI->getParent()))
         CondOp = RecipeBuilder.getBlockInMask(CurrentLink->getParent());
 
+      RecurrenceDescriptor RdxDesc = Legal->getRecurrenceDescriptor(
+          cast<PHINode>(PhiR->getUnderlyingInstr()));
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ayalz wrote:

TODO to also capture RdxDesc's FMF in PhiR, similar to capturing its Kind, to avoid retrieving RdxDesc here?
Can `CM.useOrderedReductions(RdxDesc)` below be replaced with `PhiR->isOrdered()`?

https://github.com/llvm/llvm-project/pull/142322