bug#43725: 28.0.50; Include feature/native-comp into master

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, larsi@gnus.org, monnier@iro.umontreal.ca,
>         43725@debbugs.gnu.org
> Date: Thu, 18 Feb 2021 20:32:06 +0000
> 
> >> Several comparisons like this one:
> >>
> >>   +  if (val != (long) val)
> >>
> >> are IMO better written as
> >>
> >>   if (val > LONG_MAX || val < LONG_MIN)
> >
> > Fixed by 72e4a22391
> 
> I noticed that with the suggested fix applied in configurations where
> 'val' can't exceed a long on the positive side GCC (trunk from some time
> ago) is complaining emitting the following warning:
> 
> comp.c:1174:22: warning: logical ‘or’ of collectively exhaustive tests is 
> always true [-Wlogical-op]
>  1174 |   if (val > LONG_MAX || val < LONG_MIN)
>       |                      ^~
> 
> Not sure what's the best way to silence it or if we want to revert to
> the previous formulation.

You can either condition that by WIDE_EMACS_INT, or add a comparison
between LONG_MAX and INT_MAX.