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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/103451] New: crash at gcc/range-op.cc:1836
Date: Sat, 27 Nov 2021 09:10:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103451

            Bug ID: 103451
           Summary: crash at gcc/range-op.cc:1836
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For this C code:

int func_10_ptr_12;

void func_10(long li_8)=20
{
  long *ptr_9 =3D &li_8;
  li_8 &=3D *ptr_9 / 0 ?: li_8;
  for (;;)
    func_10_ptr_12 &=3D 4 ? *ptr_9 : 4;
}

void func_9_s_8()=20
{=20
  func_10(func_9_s_8);=20
}

on recent gcc, does this:

$ /home/dcb/gcc/results/bin/gcc -c -O2 bug775.c
during IPA pass: inline
bug775.c: At top level:
bug775.c:14:1: internal compiler error: Segmentation fault
   14 | }
      | ^
0xdabcb9 crash_signal(int)
        ../../trunk.git/gcc/toplev.c:322
0x1c98f2f operator_div::wi_fold(irange&, tree_node*,
generic_wide_int<wide_int_storage> const&, generic_wide_int<wide_int_storag=
e>
const&, generic_wide_int<wide_int_storage> const&,
generic_wide_int<wide_int_storage> const&) const
        ../../trunk.git/gcc/range-op.cc:1836

The bug first seems to occur sometime between git hash 415f9ee404dc9e8a
and 4a2007594cff78fb, a distance of 22 commits.=