[llvm] [LV] Use frozen start value for FindLastIV if needed. (PR #132691)

[David Sherwood via llvm-commits]

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@@ -10365,24 +10385,7 @@ preparePlanForEpilogueVectorLoop(VPlan &Plan, Loop *L,
   VPBasicBlock *Header = VectorLoop->getEntryBasicBlock();
   Header->setName("vec.epilog.vector.body");
 
-  // Re-use the trip count and steps expanded for the main loop, as
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david-arm wrote:

That's fine. 👍 

https://github.com/llvm/llvm-project/pull/132691