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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/115127] [12/13/14/15 Regression] passing zero to
 __builtin_ctz() check missing since r12-151
Date: Sun, 02 Jun 2024 01:47:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115127

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2024-05-18 00:00:00         |2024-06-02
             Status|UNCONFIRMED                 |NEW
           Keywords|needs-bisection,            |
                   |needs-reduction             |
     Ever confirmed|0                           |1
            Summary|[12/13/14/15 Regression]    |[12/13/14/15 Regression]
                   |passing zero to             |passing zero to
                   |__builtin_ctz() check       |__builtin_ctz() check
                   |missing                     |missing since r12-151

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
```
int f(int a)
{
        return __builtin_ctz(a) =3D=3D 0;
}

int main(void)
{
        __builtin_printf("%d\n", f(0));
}
```


Caused by r12-151-g75f8900159133c .=