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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/104355] Misleading -Warray-bounds documentation says
 "always out of bounds"
Date: Tue, 08 Feb 2022 22:17:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104355

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The documentation is also incorrect about the warning being only active with
-ftree-vrp.  A small subset of -Warray-bounds is issued even without
optimization.  For example the following warning(s) have been issued since =
GCC
4.1:=20

$ cat a.c && gcc -S -Wall a.c
int f (void)
{
  return __builtin_strlen ("123" + 5);
}
a.c: In function =E2=80=98f=E2=80=99:
a.c:3:34: warning: offset =E2=80=985=E2=80=99 outside bounds of constant st=
ring
[-Warray-bounds]
    3 |   return __builtin_strlen ("123" + 5);
      |                            ~~~~~~^~~
a.c:3:10: warning: offset =E2=80=985=E2=80=99 outside bounds of constant st=
ring
[-Warray-bounds]
    3 |   return __builtin_strlen ("123" + 5);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~=