[llvm] [VPlan] Update scalar induction resume values in VPlan. (PR #110577)

[Florian Hahn via llvm-commits]

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@@ -7988,25 +8010,40 @@ EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(
       Phi->removeIncomingValue(EPI.MemSafetyCheck);
   }
 
-  // Generate a resume induction for the vector epilogue and put it in the
-  // vector epilogue preheader
+  // Try to re-use an existing resume phi if it matches the resume values for
+  // the canonical induction. Otherwise generate a resume phi for the canonical
+  // induction for the vector epilogue and put it in the vector epilogue
+  // preheader.
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fhahn wrote:

Updated, thanks

https://github.com/llvm/llvm-project/pull/110577