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From: "shaohua.li at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111671] New: ICE in get_default_value, at
 tree-ssa-ccp.cc:312
Date: Tue, 03 Oct 2023 07:11:13 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111671

            Bug ID: 111671
           Summary: ICE in get_default_value, at tree-ssa-ccp.cc:312
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: shaohua.li at inf dot ethz.ch
                CC: aldyh at redhat dot com
  Target Milestone: ---

gcc at -O2/3 crashes.

Bisected to r14-2965-gc83528d2367

Compiler explorer: https://godbolt.org/z/MEnY9sYh5

$ cat a.c
int a, b, c, d;
int e() {
  if (a)
    return 0;
  return -1;
}
static unsigned f(short);
void h() {
  int g =3D 59258;
  b =3D -50;
  g |=3D e() + b;
  f(g);
}
unsigned f(short i) {
  int *j[15], *k[15] =3D {};
  j[0] =3D 0;
  {
    long l[4];
    long m =3D *l, *n[] =3D {&m};
    for (; c; c++)
      d =3D i;
    int** o[] =3D {k, j};
  }
}
int main() {}
$
$ gcc -O2 a.c
during GIMPLE pass: ccp
a.c: In function =E2=80=98f.isra=E2=80=99:
a.c:14:10: internal compiler error: in get_default_value, at
tree-ssa-ccp.cc:312
   14 | unsigned f(short i) {
      |          ^
0x7ff11cd60082 __libc_start_main
        ../csu/libc-start.c:308
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$=