[PATCH] D109648: [BuildLibCalls] Add globalmemonly to math libcalls that only modify errno

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

Is it safe to assume that errno is a "global value" in the LLVM sense? For example, here's how the musl implementation looks like: https://github.com/ifduyue/musl/blob/master/src/errno/__errno_location.c I believe C only requires that errno expands to a thread-local modifiable lvalue, but it does not necessarily have to correspond to a global.


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