[clang] [llvm] [Clang] Emit DW_TAG_template_alias for template aliases (PR #87623)

[Orlando Cazalet-Hyams via cfe-commits]

OCHyams wrote:

@Michael137 said:


> Btw, as a follow-up to this patch should we check that this is compatible with dsymutil (i.e., running dsymutil --verify)? I suspect it might need a fixup (given LLDB doesn't even support this tag)

`dsymutil --verify` seems to be happy with the tag. Upon closer inspection, I think it uses the same "verifier" code as llvm-dwarfdump so that makes sense (#89589).

There's a couple of switches in llvm/lib/DWARFLinker that look like they want a DW_TAG_template_alias:
`DependencyTracker::isTypeTableCandidate` in `DependencyTracker.cpp` 
`AcceleratorRecordsSaver::save` in `AcceleratorRecordsSaver.cpp`. I'm not sure what a test for those would look like but I can look into it if you'd like?



https://github.com/llvm/llvm-project/pull/87623