[PATCH] D94670: [DebugInfo][NFC] add a new DIE type to represent label + offset

[ChenZheng via Phabricator via llvm-commits]

shchenz added a comment.

Thanks for your review @MaskRay 
Also thanks Hubert for your good comments. @hubert.reinterpretcast

> So how does your example work?

Sorry for causing confusion. That is a pseudo example.

> To be clear, you said XLC does not support assembly mode, but you'll implement something in llvm/lib/MC, then can this limitation be removed?

Yes, as Hubert said, IBM XLC/C++ backend is not based on llvm. It only has object mode.

> Finally, can you provide instructions building a cross compiling GCC for AIX? I want to try out a freely accessible compiler to get the larger picture of the debug info support on AIX.

Ha, I am not allowed to touch gcc source code, so I can not provide the instructions. Supplement to Hubert's explanation: There is some documentation about XCOFF format, like https://www.ibm.com/support/knowledgecenter/ssw_aix_72/filesreference/XCOFF.html and there are some explanations for dwarf sections in it.


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