[llvm] [VPlan] Add transform to replace VPWidenCanonicalIV with wide IV. (PR #194267)

[Ramkumar Ramachandra via llvm-commits]

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@@ -6266,6 +6266,10 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
          "Trying to execute plan with unsupported UF");
   if (BestVPlan.hasEarlyExit())
     ++LoopsEarlyExitVectorized;
+
+  VPlanTransforms::replaceWidenCanonicalIVWithWidenIV(
+      BestVPlan, *PSE.getSE(), CM.TTI, Config.CostKind, BestVF, BestUF,
+      CM.ValuesToIgnore);
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artagnon wrote:

Isn't this an optimization? Why is it in executePlan?

https://github.com/llvm/llvm-project/pull/194267