[llvm] [VPlan] First step towards VPlan cost modeling (LegacyCM in CostCtx) (PR #92555)

[Florian Hahn via llvm-commits]

================
@@ -344,6 +344,15 @@ class LoopVectorizationPlanner {
   /// A builder used to construct the current plan.
   VPBuilder Builder;
 
+  /// Computes the cost of \p Plan for vectorization factor \p VF.
+  ///
+  /// The current implementation requires access to the legacy cost model which
+  /// is why it is kept separate from the VPlan-only cost infrastructure.
+  ///
+  /// TODO: Move to VPlan::computeCost once the use of the legacy cost model
+  /// has been retired.
----------------
fhahn wrote:

Updated, thanks!

https://github.com/llvm/llvm-project/pull/92555