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From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/105802] [13 Regression] ICE: in
 irange_intersect, at value-range.cc:1955 with -funswitch-loops
Date: Wed, 01 Jun 2022 13:37:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105802

Andrew Macleod <amacleod at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amacleod at redhat dot com

--- Comment #2 from Andrew Macleod <amacleod at redhat dot com> ---
Its trapoping on
 irange::irange_intersect (const irange &r)
{
  gcc_checking_assert (!legacy_mode_p () && !r.legacy_mode_p ());
  gcc_checking_assert (undefined_p () || r.undefined_p ()
                       || range_compatible_p (type (), r.type ()));

on the range_compatible_p() call returning false.

688               if (!ranger->gori ().outgoing_edge_range_p (r, e, idx,
689=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20
*get_global_range_query ()))
690                 continue;
691               r.intersect (path_range);

(gdb) p path_range.dump(stderr)
[irange] E [0, 0]$5 =3D void

(gdb) p r.dump(stderr)
[irange] int [-INF, -1][2, +INF]

I guess E and int are not compatible types ?  for ranges we check:

  return (TYPE_PRECISION (type1) =3D=3D TYPE_PRECISION (type2)
          && TYPE_SIGN (type1) =3D=3D TYPE_SIGN (type2));=