[PATCH] D97812: [mir] Fix confusing MIR when MMO's value is nullptr but offset is non-zero

[Daniel Sanders via Phabricator via llvm-commits]

dsanders added a comment.

Note: I went with undef in this patch because the keyword already exists but it occurred to me while posting that that could also be confusing. The location is defined, we just don't know what it is. We might want to consider something more direct like 'unknown'. Any thoughts on the spelling to use?


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