[PATCH] D156497: [BPF] Emit UNDEF rather than constant 0

[Tamir Duberstein via Phabricator via llvm-commits]

tamird added a comment.

> With current clang, could you show me the error message with 'constant 0' vs. 'undef'? We can then decide to pick the one which is more user friendly.

You're referring to verifier errors, right? With "constant 0" there is no verifier error - the program will just do the wrong thing (not what the programmer intended). I don't have the "undef" verifier error on hand, I can get that to you tomorrow.


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https://reviews.llvm.org/D156497