[Bug middle-end/110874] [14 Regression] ice with -O2 with recent gcc

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110874

--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:91c963ea6f845a0c59b7523a5330b8d3ed1beb6a

commit r14-2978-g91c963ea6f845a0c59b7523a5330b8d3ed1beb6a
Author: Andrew Pinski <apinski@marvell.com>
Date:   Wed Aug 2 14:49:00 2023 -0700

    Fix PR 110874: infinite loop in gimple_bitwise_inverted_equal_p with fre

    This changes gimple_bitwise_inverted_equal_p to use a 2 different match
patterns
    to try to match bit_not wrapped with a possible nop_convert and a
comparison
    also wrapped with a possible nop_convert. This is to avoid being recursive.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

    gcc/ChangeLog:

            PR tree-optimization/110874
            * gimple-match-head.cc (gimple_bit_not_with_nop): New declaration.
            (gimple_maybe_cmp): Likewise.
            (gimple_bitwise_inverted_equal_p): Rewrite to use
gimple_bit_not_with_nop
            and gimple_maybe_cmp instead of being recursive.
            * match.pd (bit_not_with_nop): New match pattern.
            (maybe_cmp): Likewise.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/110874
            * gcc.c-torture/compile/pr110874-a.c: New test.