[llvm] [WIP][SLP] SLP's copyable elements based upon Main/Alt operations. (PR #124242)

[Dinar Temirbulatov via llvm-commits]

================
@@ -4296,6 +4535,10 @@ class BoUpSLP {
     /// ScheduleData structures are recycled.
     DenseMap<Instruction *, ScheduleData *> ScheduleDataMap;
 
+    /// Attaches ScheduleData to Instruction with the leading key.
+    DenseMap<Value *, SmallDenseMap<Value *, ScheduleData *>>
----------------
dtemirbulatov wrote:

Yes, thanks the single one storage is better.

https://github.com/llvm/llvm-project/pull/124242