[llvm] [LV] Reuse VPReplicateRecipe to handle scalar stores in exit block. (PR #106342)

[Florian Hahn via llvm-commits]

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@@ -9406,11 +9385,14 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
     auto *FinalReductionResult = new VPInstruction(
         VPInstruction::ComputeReductionResult, {PhiR, NewExitingVPV}, ExitDL);
     FinalReductionResult->insertBefore(*MiddleVPBB, IP);
-    OrigExitingVPV->replaceUsesWithIf(FinalReductionResult, [](VPUser &User,
-                                                               unsigned) {
-      return match(&User, m_Binary<VPInstruction::ExtractFromEnd>(m_VPValue(),
-                                                                  m_VPValue()));
-    });
+    OrigExitingVPV->replaceUsesWithIf(
+        FinalReductionResult, [IntermediateStore](VPUser &User, unsigned) {
+          return match(&User, m_Binary<VPInstruction::ExtractFromEnd>(
+                                  m_VPValue(), m_VPValue())) ||
+                 (isa<VPReplicateRecipe>(&User) &&
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fhahn wrote:

sufficient to check the the users are not defined in the vector region?

https://github.com/llvm/llvm-project/pull/106342