Re: [PATCH] fix "unreplaced" warnings caused by using typeof() on inline functions

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On Fri, Jun 24, 2022 at 06:46:01PM +0200, Luc Van Oostenryck wrote:
> From: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
> 
> Currently, sparse do all its inlining at the tree level, during
> constant expansion. To not mix-up the evaluation of the original
> function body in case the address of an inline function is taken or
> when the function can't otherwise be inlined, the statements and
> symbols lists of inline functions are kept in separated fields.
> Then, if the original body must be evaluated it must first be
> 'uninlined' to have a copy in the usual fields.
> 
> This make sense when dealing with the definition of the function.
> But, when using typeof() on functions, the resulting type doesn't
> refer to this definition, it's just a copy of the type and only
> of the type. There shouldn't be any reasons to uninline anything.
> However, the distinction between 'full function' and 'type only'
> is not made during evaluation and the uninlining attempt produce
> a lot of "warning: unreplaced symbol '...'" because of the lack
> of a corresponding definition.
> 
> Fix this by not doing the uninlining if the symbol lack a definition.
> 
> Note: It would maybe be more appropriate for EXPR_TYPE to use
>       a stripped-own version of evaluate_symbol() doing only the
>       examination of the return and argument types, bypassing the
>       attempt to uninline the body and evaluate the initializer and
>       the statements since there is none of those for an EXPR_TYPE.

Uwe, can we get a Debian package with this fix, it's really a tons of such
messages when compile kernel with C=1?

-- 
With Best Regards,
Andy Shevchenko





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