https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93385
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In fact if we add -Wuninitialized, we get the warning:
t2.c: In function ‘main’:
t2.c:7:8: warning: ‘d’ is used uninitialized in this function [-Wuninitialized]
7 | d %= (unsigned) d;
| ^~~~~~~~~~~~
t2.c:4:1: note: ‘d’ was declared here
4 | c (unsigned __int128 d)
| ^
--- CUT ---
Here is a testcase without __int128 so other targets:
char a, b;
static inline int
c (unsigned int d)
{
char e = 0;
d %= (unsigned short) d;
e -= 0;
__builtin_strncpy (&a, &e, 1);
return e + b ;
}
int
main (void)
{
c (~0);
return 0;
}
