[llvm] [CodeGen] Introduce Static Data Splitter pass (PR #122183)

[Mingming Liu via llvm-commits]

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@@ -107,6 +109,8 @@ class MachineJumpTableInfo {
     return JumpTables;
   }
 
+  void updateJumpTableHotness(size_t JTI, DataHotness Hotness);
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mingmingl-llvm wrote:

Added a comment for this method, renamed it to `updateJumpTableEntryHotness`.

> this is for the jump table static data object

It makes sense to comment about how the information is used. The comment in `MachineJumpTableEntry` field does this. 

https://github.com/llvm/llvm-project/pull/122183