dwblaikie wrote:

> If the DWO ID is just a hash of the file path or something that isn't 
> guaranteed to be unique with each new build, then we need the UUID in the 
> .dwp file.

Nah, the DWO ID, as per spec, is a semantic hash of the DWARF contents. It 
should change, generally, if any part of the DWARF changes. 
https://github.com/llvm/llvm-project/blob/1d4fc381d3da4317cc2cfa59b2d59d53decddf71/llvm/lib/CodeGen/AsmPrinter/DIEHash.cpp#L399


https://github.com/llvm/llvm-project/pull/81067
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