https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96228
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
The reason is rather that no flow analysis is performed by -Wstack-usage, which
means that it cannot distinguish:
int main(void) {
char *a = __builtin_alloca(4);
a[0] = 0;
__builtin_printf("%c", a[0]);
return 0;
}
from
int main(void) {
while (1) {
char *a = __builtin_alloca(4);
a[0] = 0;
__builtin_printf("%c", a[0]);
}
return 0;
}
so it assumes the worst.
