[clang] [lldb] [lldb] Analyze enum promotion type during parsing (PR #115005)

[Ilia Kuklin via cfe-commits]

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@@ -2367,11 +2369,36 @@ size_t DWARFASTParserClang::ParseChildEnumerators(
     }
 
     if (name && name[0] && got_value) {
-      m_ast.AddEnumerationValueToEnumerationType(
+      auto ECD = m_ast.AddEnumerationValueToEnumerationType(
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kuilpd wrote:

> > Iteration over elements in SemaDecl.cpp checks for the element is a EnumConstantDecl, otherwise it's skipped, so I had to create a separate collection in case something is removed, and then pass that one to computeEnumBits
> 
> Could you elaborate on this? LLDB only ever puts `EnumConstantDecl`s there right?

This line: [SemaDecl.cpp:20070](https://github.com/llvm/llvm-project/blob/1141fd0bf847b54d9b12c3a0aff093c02792e4de/clang/lib/Sema/SemaDecl.cpp#L20070), if it discards something, I cannot pass the original `Elements` to `computeEnumBits`.

https://github.com/llvm/llvm-project/pull/115005