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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/40635] [12 Regression] bogus name and
 location in 'may be used uninitialized' warning
Date: Wed, 15 Dec 2021 18:48:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D40635

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|bogus name and location in  |[12 Regression] bogus name
                   |'may be used uninitialized' |and location in 'may be
                   |warning                     |used uninitialized' warning

--- Comment #17 from Martin Sebor <msebor at gcc dot gnu.org> ---
In GCC 11 the statement in the phipopt2 dump does have a location so this p=
art
is a GCC 12 regression:

  <bb 8> [local count: 5226752]:

  <bb 9> [local count: 1073741824]:
  # _16 =3D PHI <[../pr40635.c:22:20] -1(3), [../pr40635.c:30:12] s42_20(7),
[../pr40635.c:29:16] -1(8)>
  [../pr40635.c:38:5] foo ();
  [../pr40635.c:39:8] _28 =3D _16 < 0;
  [../pr40635.c:39:8] _5 =3D (int) _28;
  [../pr40635.c:39:8] _4 =3D -_5;
  return _4;=