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From: "zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111043] [14 regression] ICE in
 adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1068
Date: Wed, 01 Nov 2023 07:32:36 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111043

--- Comment #9 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
Another at -O2 and -O3:

[545] % gcctk -v
Using built-in specs.
COLLECT_GCC=3Dgcctk
COLLECT_LTO_WRAPPER=3D/local/suz-local/software/local/gcc-trunk/libexec/gcc=
/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=3Dyes --prefix=3D/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=3Dc,c++ --disable-werror --enable-mu=
ltilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20231101 (experimental) (GCC)=20
[546] %=20
[546] % gcctk -O2 small.c
during GIMPLE pass: ch_vect
small.c: In function =E2=80=98main=E2=80=99:
small.c:21:5: internal compiler error: in adjust_loop_info_after_peeling, at
tree-ssa-loop-ivcanon.cc:1069
   21 | int main() {
      |     ^~~~
0x8736bd adjust_loop_info_after_peeling(loop*, int, bool)
        ../../gcc-trunk/gcc/tree-ssa-loop-ivcanon.cc:1069
0x1287a14 copy_headers
        ../../gcc-trunk/gcc/tree-ssa-loop-ch.cc:1108
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.
[547] %=20
[547] % cat small.c
int a, *b, c, *d, e, f;
static void g() {
  int h;
    while (1)
      while (1) {
        int *i =3D 0;
        h =3D 0;
        while (c)
          *d =3D 1;
        if (e)
          break;
        if ((h ^ f) > f)
          for (; e < 1; e++)
            ;
        for (a =3D 0; a < 1; a++)
          if (*i)
            break;
        b =3D &h;
      }
}
int main() {
  if (a)
    g();
  return 0;
}=