https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94247
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
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Keywords| |diagnostic
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The warning is not context sensitive. What I mean is it does not take into
account the range of k.
Also you can avoid the warning by using either unsigned char or signed char.
char is a special type. Unlike other plain types, it can default either to
signed or unsigned and for GCC it depends on the ABI.
>and the compiler already knows this
Not when the warning is generated from the front-end. It does not know the
range of the char variable there.
