[llvm] [VPlan] Replace PhiR operand of ComputeAnyOfResult with VPIRFlags. (PR #175657)

[via llvm-commits]

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@@ -8837,25 +8849,22 @@ void LoopVectorizationPlanner::addReductionResultComputation(
     // with a boolean reduction phi node to check if the condition is true in
     // any iteration. The final value is selected by the final
     // ComputeReductionResult.
-    if (RecurrenceDescriptor::isAnyOfRecurrenceKind(RecurrenceKind)) {
-      auto *Select = cast<VPRecipeBase>(*find_if(PhiR->users(), [](VPUser *U) {
-        return match(U, m_Select(m_VPValue(), m_VPValue(), m_VPValue()));
-      }));
-      VPValue *Cmp = Select->getOperand(0);
+    if (AnyOfSelect) {
+      VPValue *Cmp = AnyOfSelect->getOperand(0);
       // If the compare is checking the reduction PHI node, adjust it to check
       // the start value.
       if (VPRecipeBase *CmpR = Cmp->getDefiningRecipe())
         CmpR->replaceUsesOfWith(PhiR, PhiR->getStartValue());
-      Builder.setInsertPoint(Select);
+      Builder.setInsertPoint(AnyOfSelect);
 
       // If the true value of the select is the reduction phi, the new value is
       // selected if the negated condition is true in any iteration.
-      if (Select->getOperand(1) == PhiR)
+      if (AnyOfSelect->getOperand(1) == PhiR)
         Cmp = Builder.createNot(Cmp);
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ayalz wrote:

Independent: can swap the (last) two operands of the select, but easier to negate `Cmp` here and fold it later?

https://github.com/llvm/llvm-project/pull/175657