[llvm] [VPlan] Process simplifyRecipes via a worklist (PR #133977)

[Ramkumar Ramachandra via llvm-commits]

================
@@ -1684,6 +1706,7 @@ void VPlanTransforms::optimize(VPlan &Plan) {
   runPass(removeRedundantInductionCasts, Plan);
 
   runPass(simplifyRecipes, Plan, *Plan.getCanonicalIV()->getScalarType());
+  runPass(simplifyBlends, Plan);
----------------
artagnon wrote:

Maybe we can split out this refactoring and land it first?

https://github.com/llvm/llvm-project/pull/133977