[Bug middle-end/103961] [12 Regression] gcc-12 apparently miscompiles libcap's cap_to_text() function

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103961

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There is a bogus warning too:

cap_text.c:431:11: warning: '%c' directive writing 1 byte into a region of size
0 [-Wformat-overflow=]
In file included from /usr/include/stdio.h:894,
                 from cap_text.c:13:
In function 'sprintf',
    inlined from 'cap_to_text' at cap_text.c:431:11:
/usr/include/bits/stdio2.h:38:10: note: '__builtin___sprintf_chk' output
between 2 and 5 bytes into a destination of size 0

And the gimple looks wrong:
  _164 = __sprintf_chkD.1304 (p_141, 1, 0, [cap_text.c:431:11] "%c%s%s%s", _31,
iftmp.56_86, iftmp.55_85, iftmp.54_84);


For GCC 11 we had:
  _164 = __sprintf_chkD.1270 (p_141, 1, 18446744073709551615,
[cap_text.c:431:11] "%c%s%s%s", _33, iftmp.56_90, iftmp.55_89, iftmp.54_88);