[llvm] [LV] Allow for vectorizing parallel def-use chains (PR #225405)

[John Brawn via llvm-commits]

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@@ -367,6 +374,7 @@ static RecurrenceDescriptor getMinMaxRecurrence(PHINode *Phi, Loop *TheLoop,
   // Validate chain entries and collect stores from chain entries and
   // intermediate ops.
   SmallVector<StoreInst *> Stores;
+  SmallPtrSet<Value *, 8> SubChains;
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john-brawn-arm wrote:

No longer used.

https://github.com/llvm/llvm-project/pull/225405