[PATCH] D123602: [MSan] Ensure argument shadow initialized on memcpy

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis accepted this revision.
eugenis added a comment.

Could you clarify that the problem is specifically with byval argument in the patch description?

Also, I'm wondering if we should make this copy explicit, perhaps by checking if the argument has any uses in the function body. I'm not 100% convinced that this is the only place where we forget to copy the shadow.

This change LGTM as a quick fix.


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