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

[via llvm-commits]

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@@ -8491,17 +8499,16 @@ void LoopVectorizationPlanner::buildVPlansWithVPRecipes(ElementCount MinVF,
         VPlanTransforms::truncateToMinimalBitwidths(
             *Plan, CM.getMinimalBitwidths(), PSE.getSE()->getContext());
       VPlanTransforms::optimize(*Plan, *PSE.getSE());
-      assert(verifyVPlanIsValid(*Plan) && "VPlan is invalid");
+      assert(verifyVPlanIsValid(*Plan, /*IsAbstract*/ true) &&
+             "VPlan is invalid");
       VPlans.push_back(std::move(Plan));
     }
     VF = SubRange.End;
   }
 }
 
-// Add the necessary canonical IV and branch recipes required to control the
-// loop.
-static void addCanonicalIVRecipes(VPlan &Plan, Type *IdxTy, bool HasNUW,
-                                  DebugLoc DL) {
+// Add the required canonical IV
----------------
ayalz wrote:

```suggestion
// Add the required canonical IV.
```

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