[llvm] [VPlan] Use ResumePhi to create reduction resume phis. (PR #110004)

[Florian Hahn via llvm-commits]

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@@ -9511,6 +9497,22 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
         });
     FinalReductionResult->insertBefore(*MiddleVPBB, IP);
 
+    VPBasicBlock *ScalarPHVPBB = nullptr;
+    if (MiddleVPBB->getNumSuccessors() == 2) {
+      // Order is strict: first is the exit block, second is the scalar
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fhahn wrote:

Updated, thanks!

https://github.com/llvm/llvm-project/pull/110004