[llvm] [SLP][NFC] Redesign schedule bundle, separate from schedule data, NFC (PR #131625)

[Alexey Bataev via llvm-commits]

================
@@ -4011,26 +4014,55 @@ class BoUpSLP {
   /// List of hashes of vector of loads, which are known to be non vectorizable.
   DenseSet<size_t> ListOfKnonwnNonVectorizableLoads;
 
+  class ScheduleEntity {
+    friend class ScheduleBundle;
+    friend class ScheduleData;
+
+  protected:
+    enum class Kind { ScheduleData, ScheduleBundle };
+    Kind getKind() const { return K; }
+    ScheduleEntity(Kind K) : K(K) {}
+
+  private:
+    /// Used for getting a "good" final ordering of instructions.
+    int SchedulingPriority = 0;
+    /// The kind of the ScheduleEntity.
+    Kind K = Kind::ScheduleData;
+
+  public:
+    ScheduleEntity() = delete;
+    /// Gets/sets the scheduling priority.
+    void setSchedulingPriority(int Priority) { SchedulingPriority = Priority; }
+    int getSchedulingPriority() const { return SchedulingPriority; }
+    bool isReady() const {
+      if (auto *SD = dyn_cast<ScheduleData>(this))
+        return SD->isReady();
+      return cast<ScheduleBundle>(this)->isReady();
----------------
alexey-bataev wrote:

Still needed

https://github.com/llvm/llvm-project/pull/131625