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

[Mingming Liu via llvm-commits]

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@@ -124,6 +124,17 @@ class GlobalObject : public GlobalValue {
   /// appropriate default object file section.
   void setSection(StringRef S);
 
+  /// Set the section prefix for this global object.
+  void setSectionPrefix(StringRef Prefix);
+
+  /// Update the section prefix, unless the existing prefix is the same as
+  /// `KeepPrefix`.
+  bool updateSectionPrefix(StringRef Prefix,
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mingmingl-llvm wrote:

done.

It occurred to me that counters will increase monotonically (before it becomes max), so I asserted a global variable should not have `.hot` prefix under `if (PSI->isColdCount(Iter->second)) {` around StaticDataSplitter.cpp L 224.

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