[llvm] [VPlan] Delay adding canonical IV increment and exit branches. (PR #82270)

[via llvm-commits]

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@@ -1307,3 +1268,71 @@ void VPlanTransforms::dropPoisonGeneratingRecipes(
     }
   }
 }
+
+void VPlanTransforms::prepareToExecute(
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ayalz wrote:

Would be good to be more precise than "prepareToExecute()".

https://github.com/llvm/llvm-project/pull/82270