[clang] [llvm] Reland "[DebugMetadata][DwarfDebug] Support function-local types in lexical block scopes (4/7)" (PR #165032)

[David Blaikie via llvm-commits]

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@@ -703,13 +727,41 @@ class MetadataLoader::MetadataLoaderImpl {
     return Error::success();
   }
 
-  void upgradeDebugInfo(bool ModuleLevel) {
+  /// Specifies which kind of debug info upgrade should be performed.
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dwblaikie wrote:

Maybe there could be some more details in this comment about why there are different kinds of debug info upgrade?

https://github.com/llvm/llvm-project/pull/165032