[llvm] [CodeGen][StaticDataPartitioning]Place local-linkage global variables in hot or unlikely prefixed sections based on profile information (PR #125756)

[Snehasish Kumar via llvm-commits]

================
@@ -117,18 +142,89 @@ bool StaticDataSplitter::partitionStaticDataWithProfiles(MachineFunction &MF) {
           // Hotness is based on source basic block hotness.
           // TODO: PSI APIs are about instruction hotness. Introduce API for
           // data access hotness.
-          if (PSI->isColdBlock(&MBB, MBFI))
+          if (Count && PSI->isColdCount(*Count))
             Hotness = MachineFunctionDataHotness::Cold;
 
           if (MJTI->updateJumpTableEntryHotness(JTI, Hotness))
             ++NumChangedJumpTables;
+        } else if (Op.isGlobal()) {
----------------
snehasish wrote:

Do we need to check `Op.isGlobal()` again? I think we can only get past L128 if Op is JTI or global and we check JTI on L133.

https://github.com/llvm/llvm-project/pull/125756