[llvm] [llvm][DebugInfo][DWARF] Add DW_AT_LLVM_optimized extension. (PR #214261)

[Michael Buch via llvm-commits]

Michael137 wrote:

Now that there's several vendors that seem to want this should this be standardized? In the hopes to by-default replace the usage of the Apple and now LLVM variants?

https://github.com/llvm/llvm-project/pull/214261