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

[Mingming Liu via llvm-commits]

================
@@ -88,6 +88,15 @@ template <> struct ilist_callback_traits<MachineBasicBlock> {
   }
 };
 
+// The hotness of static data tracked by a MachineFunction and not represented
+// as a global object in the module IR / MIR. Typical examples are
+// MachineJumpTableInfo and MachineConstantPool.
+enum class DataHotness {
+  Unknown,
+  Cold,
+  Hot,
+};
----------------
mingmingl-llvm wrote:

Renamed it to `MachineFunctionDataHotness`.

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