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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111355] [14 Regression] ICE on valid code at
 -O1 and above: in lower_bound, at value-range.h:1078
Date: Thu, 21 Sep 2023 05:18:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111355

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jiu Fu Guo <guojiufu@gcc.gnu.org>:

https://gcc.gnu.org/g:4d80863d7f93c0a839d1fe5dc59be83153e89110

commit r14-4192-g4d80863d7f93c0a839d1fe5dc59be83153e89110
Author: Jiufu Guo <guojiufu@linux.ibm.com>
Date:   Wed Sep 20 11:11:58 2023 +0800

    check undefine_p for one more vr

    The root cause of PR111355 and PR111482 is missing to check if vr0
    is undefined_p before call vr0.lower_bound.

    In the pattern "(X + C) / N",

        (if (INTEGRAL_TYPE_P (type)
             && get_range_query (cfun)->range_of_expr (vr0, @0))
         (if (...)
           (plus (op @0 @2) { wide_int_to_tree (type, plus_op1 (c)); })
           (if (TYPE_UNSIGNED (type) && c.sign_mask () < 0 ...
                && wi::geu_p (vr0.lower_bound (), -c))

    In "(if (...)", there is code to prevent vr0's undefined_p,
    But in the "else" part, vr0's undefined_p is not checked before
    "wi::geu_p (vr0.lower_bound (), -c)".

            PR tree-optimization/111355

    gcc/ChangeLog:

            * match.pd ((X + C) / N): Update pattern.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr111355.c: New test.=