[llvm] [VPlan] Optimize more IV increment exit users by using a map (PR #147016)

[Alexey Bataev via llvm-commits]

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@@ -8887,15 +8887,18 @@ VPlanPtr LoopVectorizationPlanner::tryToBuildVPlanWithVPRecipes(
   // Update wide induction increments to use the same step as the corresponding
   // wide induction. This enables detecting induction increments directly in
   // VPlan and removes redundant splats.
+  DenseMap<VPValue *, VPWidenInductionRecipe *> MapIVs;
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alexey-bataev wrote:

SmallDenseMap

https://github.com/llvm/llvm-project/pull/147016