MaskRay wrote:

> If a function is declared without a prototype (pre-C23), it doesn't mean it 
> has a void argument list; it means the argument list is undeclared. So you 
> can't just assume the argument list is void; you have to compute the argument 
> types from the actual arguments passed to the call.
+1. I don't think we have take this patch.
 
> Or you could just forbid unprototyped functions in KCFI mode, If you don't 
> want to deal with the edge cases here (i.e. -Werror=strict-prototypes).

Seems fine. 

https://github.com/llvm/llvm-project/pull/106677
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