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

[Nashe Mncube via llvm-commits]

================
@@ -354,19 +354,28 @@ static RecurrenceDescriptor getMinMaxRecurrence(PHINode *Phi, Loop *TheLoop,
     return !Chain.contains(U) && TheLoop->contains(U) &&
            GetMinMaxRK(U, A, B) == RecurKind::None;
   });
+
+  // If the backedge value has more than one use we should consider whether
+  // these are actually uses inside the loop.
+  bool BackedgeValueHasOneValidUse =
----------------
nasherm wrote:

Done

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