jmorse wrote:

(Transparency, I wrote some of the code in the PR so dunno if I should review 
it,)

> I /think/ function-local types need to go in definitions - in /abstract/ 
> definitions if they exist (not in the inlined instances or concrete out of 
> line instances).

I think this highlights the difference in my thinking -- I've been treating 
"declaration" DISubprograms like they're actually "abstract" DISubprograms 
(they're very similar in my mind). As far as I'm aware we don't have any 
entities in LLVM-IR metadata to represent abstract DISubprograms, and from 
`DwarfCompileUnit::constructAbstractSubprogramScopeDIE` it looks like we just 
construct them on-the-fly when they become necessary. Would you see having a 
`DIAbstractSubprogram` metadata node, or a new subprogram flag, as being the 
correct refinement?

https://github.com/llvm/llvm-project/pull/142166
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