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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114374] [12/13/14 Regression] snprintf
 Wformat-truncation
Date: Mon, 18 Mar 2024 16:08:05 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114374

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-03-18
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |pinskia at gcc dot gnu.org

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

For some reason doing changing `loop++` to what it does manually does not w=
arn:
That is for
```
void f() {
    char buf[11];
    int loop(1);
    do {
        __builtin_snprintf(buf,sizeof(buf),"%d",loop++);
    } while(loop<10);
}
void g() {
    char buf[11];
    int loop(1);
    do {
        int old =3D loop;
        loop++;
        __builtin_snprintf(buf,sizeof(buf),"%d",old);
    } while(loop<10);
}
```

f is being warned about but g is not.=