[Bug c/110641] New: ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023

["shaohua.li at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110641

            Bug ID: 110641
           Summary: ICE in adjust_loop_info_after_peeling, at
                    tree-ssa-loop-ivcanon.cc:1023
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: shaohua.li at inf dot ethz.ch
  Target Milestone: ---

This looks like a recent regression.

Compiler explorer: https://godbolt.org/z/55EzjdoTK

$ cat a.c
int a, b, c, d, e, g;
int *f;
short **h;
int i() {}
int j() { return a && a <= 'F' || a >= 'a' && a <= 'f'; }
int k() {
  d = 0;
  for (; d < 2; d = i())
    e = b = 0;
  for (; e - 71 + b; b++)
    ;
  for (;; c--) {
    g = 0;
    for (; j() + c + g >= 0; g--)
      **h = (char)b + b || f;
  }
}
int main() {}
$
$ gcc-tk -O3 a.c
during GIMPLE pass: ch_vect
crash_0_reduced.c: In function ‘k’:
crash_0_reduced.c:6:5: internal compiler error: in
adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023
    6 | int k() {
      |     ^
0x7f7b0bec4082 __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.
$
$ gcc-tk -v
Using built-in specs.
COLLECT_GCC=gcc-tk
COLLECT_LTO_WRAPPER=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-322d17ae51ea0137167424e0018d7fa355948f9f/libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --disable-multilib --disable-bootstrap
--enable-languages=c,c++
--prefix=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-322d17ae51ea0137167424e0018d7fa355948f9f
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230711 (experimental) (GCC)
$