[Bug middle-end/104550] bogus warning from -Wuninitialized + -ftrivial-auto-var-init=pattern

["qinzhao at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104550

--- Comment #18 from qinzhao at gcc dot gnu.org ---
One question here, for the following testing case:

[opc@qinzhao-ol7u9 104550]$ cat t1.c
struct vx_audio_level {
 int has_monitor_level : 1;
};

void vx_set_monitor_level() {
 struct vx_audio_level info;
 __builtin_clear_padding (&info);
}
[opc@qinzhao-ol7u9 104550]$ sh t
/home/opc/Install/latest/bin/gcc -O -Wuninitialized -Wall t1.c -S
t1.c: In function ‘vx_set_monitor_level’:
t1.c:7:2: warning: ‘info’ is used uninitialized [-Wuninitialized]
    7 |  __builtin_clear_padding (&info);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
t1.c:6:24: note: ‘info’ declared here
    6 |  struct vx_audio_level info;
      |                        ^~~~

We can see that the compiler emitted the exactly same warning as with
-ftrivial-auto-var-init=pattern. 

my question is, is the "info" in __builtin_clear_padding(&info) a REAL use of
"info"? is it correct to report the uninitialized use message for it?