philnik777 wrote:

> As a second commit, I've pushed a variant that also adds an `errnomem: write` 
> effect, in order to match GCC documentation more closely. TBH I find the 
> special provision for errno in this context somewhat odd (because as far as I 
> know, `new` does not specify any specific behavior wrt errno, so this is just 
> malloc behavior leaking through), but it's probably a good idea to match GCC 
> semantics for the flag.

It's originally Clang's extension AFAIK, so I don't think we need to restrict 
ourselves to what GCC documents.

https://github.com/llvm/llvm-project/pull/197199
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