[llvm] [VPlan] Add convertToUniformRecipe transform. (PR #139150)

[Mel Chen via llvm-commits]

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@@ -1778,6 +1812,7 @@ void VPlanTransforms::optimize(VPlan &Plan) {
   runPass(simplifyRecipes, Plan, *Plan.getCanonicalIV()->getScalarType());
   runPass(simplifyBlends, Plan);
   runPass(removeDeadRecipes, Plan);
+  runPass(convertToUniformRecipes, Plan);
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Mel-Chen wrote:

Do we need to apply uniform analysis if VF=1? If not, could we skip it when VF=1?

https://github.com/llvm/llvm-project/pull/139150