[PATCH] D88335: [BuildLibCalls] Add noalias for strcat and stpcpy

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

In D88335#2295923 <https://reviews.llvm.org/D88335#2295923>, @efriedma wrote:

>> noalias on its own is probably not too useful in this context, but I think without noalias, we cannot mark either argument as readonly/writeonly
>
> That isn't how readonly works.  From LangRef: "On an argument, this attribute indicates that the function does not write through this pointer argument, even though it may write to the memory that the pointer points to."

Oh right, I forgot about that exception.


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  https://reviews.llvm.org/D88335/new/

https://reviews.llvm.org/D88335