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

[Florian Hahn via llvm-commits]

================
@@ -1086,6 +1086,40 @@ void VPlanTransforms::simplifyRecipes(VPlan &Plan, Type &CanonicalIVTy) {
   }
 }
 
+static void convertToUniformRecipes(VPlan &Plan) {
----------------
fhahn wrote:

Updated to narrowToSingleScalarRecipe, thanks

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