https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107405
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jsm28 at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2022-10-26
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
> enum { A = 0xffffffff, B = 1 << 31, };
> int main() { printf("%lx %x %zu\n", A, B, sizeof(B)); }
>
Apparently, 0xffffffff is treated by the compiler as unsigned int constant and
thus it likely leads to the promotion to a longer interger. Joseph will explain
better. If you use -1, it's fine:
enum { A = -1, B = 1 << 31, };
int main() { printf("%x %x %zu\n", A, B, sizeof(B)); }
$ gcc pr107405.c -Wall && ./a.out
ffffffff 80000000 4
