Re: MSVC and GCC compilation warnings

Jure Bagić <[email protected]> Fri, 1 May 2026 07:32:59 +0200

Newsgroups	gmane.comp.lang.lua.general
Message-ID	<afQ60jYvdhMJVNbI@archlinux>

> Can anyone explain this warning? The recursive call is guarded by two
> if's, and it calls the function with a different argument (L in the
> original call, mainth in the recursive call). How can the compiler decide
> that the recursion is infinite?
> 
> More exactly: the recursive call only happens if L->errorJmp is nil.
> But then it is done with a new L (mainth) which errorJmp field is not
> nil. So, it seems quite easy to prove that the recursive call happens at
> most once. Or am I missing something?
> 
> -- Roberto

A bug, no other way to explain it.
Clang compiles without producing that warning.

For anyone interested, the file responsible for this warning
(I think) in the gcc source is the 'gcc/gimple-warn-recursion.cc',
and in there the 'find_function_exit'.

Sorry for the private email Roberto, I meant to reply in this
list, I recently changed my email client and everything is broken.

-- 
Jure

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