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

[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]

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)
$

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023

[rguenth at gcc dot gnu.org]

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

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org
           Keywords|                            |ice-on-valid-code
   Target Milestone|---                         |14.0
          Component|c                           |tree-optimization
            Summary|ICE in                      |[14 Regression] ICE in
                   |adjust_loop_info_after_peel |adjust_loop_info_after_peel
                   |ing, at                     |ing, at
                   |tree-ssa-loop-ivcanon.cc:10 |tree-ssa-loop-ivcanon.cc:10
                   |23                          |23

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023

[pinskia at gcc dot gnu.org]

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

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-07-21

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023

[shaohua.li at inf dot ethz.ch]

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

--- Comment #2 from Shaohua Li <shaohua.li at inf dot ethz.ch> ---
Bisect to r14-2230-g7e904d6c7f2

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023

[rguenth at gcc dot gnu.org]

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

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023 since r14-2230-g7e904d6c7f2

[hubicka at gcc dot gnu.org]

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

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
mine.

[Bug tree-optimization/110641] [14 Regression] ICE in adjust_loop_info_after_peeling, at tree-ssa-loop-ivcanon.cc:1023 since r14-2230-g7e904d6c7f2

[rguenth at gcc dot gnu.org]

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

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed by r14-7138-g05e8ef2a05b477