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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/114662] [14 regression] new test case c_lto_pr113359-2 from
 r14-9841-g1e3312a25a7b34 fails
Date: Wed, 10 Apr 2024 05:56:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114662

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |linkw at gcc dot gn=
u.org
                 CC|                            |linkw at gcc dot gnu.org
   Last reconfirmed|                            |2024-04-10
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #2 from Kewen Lin <linkw at gcc dot gnu.org> ---
I think this is a test issue, with -m32 unsigned long is 4 bytes while CL1,=
CL2
are 8 bytes constants, then it considers some checks would always fail and =
the
abort will happen, since the optimization aggressively optimize away the ca=
ll
to getb, there is no chance to further check "semantic equality". The IR for
main at *.015t.cfg looks like:

int main (int argc, char * * argv)
{
  struct SB b;
  struct SA a;
  int D.3983;

  <bb 2> :
  init ();
  geta (&a, &ga);
  _1 =3D a.ax;
  if (_1 !=3D 3735928559)
    goto <bb 3>; [INV]
  else
    goto <bb 4>; [INV]

  <bb 3> :
  __builtin_abort ();

  <bb 4> :
  __builtin_abort ();

}=