[llvm] [LoopUnroll] Support parallel reductions for minmax (PR #182473)

[Madhur Amilkanthwar via llvm-commits]

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@@ -363,14 +363,12 @@ static RecurrenceDescriptor getMinMaxRecurrence(PHINode *Phi, Loop *TheLoop,
   // Validate chain entries and collect stores from chain entries and
   // intermediate ops.
   SmallVector<StoreInst *> Stores;
-  unsigned OutOfLoopUses = 0;
   for (Value *V : Chain) {
     for (User *U : V->users()) {
       if (Chain.contains(U))
         continue;
       auto *I = dyn_cast<Instruction>(U);
-      if (!I || (!TheLoop->contains(I) &&
-                 (V != BackedgeValue || ++OutOfLoopUses > 1)))
+      if (!I || (!TheLoop->contains(I) && V != BackedgeValue))
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madhur13490 wrote:

Ping @fhahn. Can you please let me know what you think about the patch?

https://github.com/llvm/llvm-project/pull/182473