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From: "guojiufu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/111303] ICE: in type, at value-range.h:869
Date: Wed, 06 Sep 2023 12:36:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111303

--- Comment #3 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
In the pattern of match.pd, there is:

          && range_op_handler (PLUS_EXPR).overflow_free_p (vr0, vr1)
          && get_range_query (cfun)->range_of_expr (vr3, @3)
          /* "X+C" and "X" are not of opposite sign.  */
          && (TYPE_UNSIGNED (type)
              || (vr0.nonnegative_p () && vr3.nonnegative_p ())
              || (vr0.nonpositive_p () && vr3.nonpositive_p ())))


For this case, "vr3" is "undefined_p", then "vr3.nonnegative_p ()" trige IC=
E.

Checking "!vr3.undefine_p ()" would be a safe fix for this ICE.=