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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107407] [12/13 Regression] Wrong code at -Os
 on x86_64-linux-gnu since r12-383-g32955416d8040b1f
Date: Wed, 26 Oct 2022 08:03:29 +0000
X-Bugzilla-Reason: CC
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X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107407

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c                           |tree-optimization
   Last reconfirmed|                            |2022-10-26
   Target Milestone|---                         |13.0
     Ever confirmed|0                           |1
                 CC|                            |marxin at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org
            Summary|Wrong code at -Os on        |[12/13 Regression] Wrong
                   |x86_64-linux-gnu            |code at -Os on
                   |                            |x86_64-linux-gnu since
                   |                            |r12-383-g32955416d8040b1f

--- Comment #1 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
A bit reduced, started with r12-383-g32955416d8040b1f

int *a;
static int **b =3D &a;
int c[4];
int d;

int e(int);

static int f(char, int);

void g() { e((f(0, 0), 0)); }

int e(int h) { *a =3D 0; }

int f(char k, int j) {
  for (;;) {
    for (; k <=3D 3; k++) {
      *b =3D &c[k];
      for (; d <=3D 1; d++)
        *a =3D 3;
    }
    break;
  }
}
int main() {
  int i;
  g();
  if (c[0] !=3D 3)
    __builtin_abort ();
}=