[llvm] [DebugInfo] Add macro tracking support to DebugInfoFinder (PR #179931)

[Vladislav Dzhidzhoev via llvm-commits]

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@@ -275,6 +278,36 @@ void DebugInfoFinder::processImportedEntity(const DIImportedEntity *Import) {
     processScope(M->getScope());
 }
 
+// Process a macro debug info node (DIMacroNode).
+//
+// A DIMacroNode is one of two types:
+//   - DIMacro: A single macro definition. Add it to the Macros list along with
+//     its containing DIMacroFile.
+//   - DIMacroFile: A file containing macros. Recursively process all nested
+//     macro nodes within it (avoiding duplicates by tracking visited nodes).
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dzhidzhoev wrote:

Should we use doxygen-style comment here? In correspondence with other functions in this file.

https://github.com/llvm/llvm-project/pull/179931