[llvm] [VPlan] - Generalize dead cycle removal in removeDeadRecipes. (PR #213632)

[Pawan Nirpal via llvm-commits]

================
@@ -687,6 +687,32 @@ static void removeRedundantInductionCasts(VPlan &Plan) {
   }
 }
 
+/// If R is a phi-like recipe starting a dead cycle of recipes, erase all
+/// reachable recipes of the dead cycle.
+static void tryToRemoveDeadCycle(VPRecipeBase *R) {
+  auto *PhiR = dyn_cast<VPSingleDefRecipe>(R);
+  if (!PhiR || !isa<VPPhiAccessors>(R) || isa<VPCurrentIterationPHIRecipe>(R))
----------------
pawan-nirpal-031 wrote:

Changed. 

https://github.com/llvm/llvm-project/pull/213632