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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/81809] missing -Wuninitialized due to alias
 analysis limitation
Date: Tue, 14 Jul 2020 22:16:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D81809

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |10.1.0, 11.0, 8.2.0, 9.2.0

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Another test case for the same underlying bug.

$ cat z.c && gcc -O2 -S -Wall z.c
void f (const int*, const int*);

void g (void)
{
  int a =3D 0, b;
  f (&a, &b);
}

void h (void)
{
  int a =3D 0, b;
  f (&a, 0);
  f (&b, 0);
}
z.c: In function =E2=80=98g=E2=80=99:
z.c:6:3: warning: =E2=80=98b=E2=80=99 may be used uninitialized [-Wmaybe-un=
initialized]
    6 |   f (&a, &b);
      |   ^~~~~~~~~~
z.c:1:6: note: by argument 2 of type =E2=80=98const int *=E2=80=99 to =E2=
=80=98f=E2=80=99 declared here
    1 | void f (const int*, const int*);
      |      ^
z.c:5:14: note: =E2=80=98b=E2=80=99 declared here
    5 |   int a =3D 0, b;
      |              ^=