[llvm] [IR]Support set/read/update the section prefix for global objects (PR #125757)

[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`.
+  void updateSectionPrefix(StringRef Prefix,
+                           std::optional<StringRef> KeepPrefix = std::nullopt);
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mingmingl-llvm wrote:

thanks for the catch! I implemented it and added a unit test in `llvm/unittests/IR/GlobalObjectTest.cpp`

https://github.com/llvm/llvm-project/pull/125757