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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/111766] Missed optimization with
 __builtin_unreachable and ands
Date: Fri, 03 Nov 2023 17:14:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111766

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <amacleod@gcc.gnu.org>:

https://gcc.gnu.org/g:7ab79a40b546a1470abaf76bec74c63e9990fe47

commit r14-5110-g7ab79a40b546a1470abaf76bec74c63e9990fe47
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Wed Oct 25 09:46:50 2023 -0400

    Adjust operators equal and not_equal to check bitmasks against constants

    Check to see if a comparison to a constant can be determined to always
    be not-equal based on the bitmask.

            PR tree-optimization/111766
            gcc/
            * range-op.cc (operator_equal::fold_range): Check constants
            against the bitmask.
            (operator_not_equal::fold_range): Ditto.
            * value-range.h (irange_bitmask::member_p): New.

            gcc/testsuite/
            * gcc.dg/pr111766.c: New.=