[Bug target/110588] btl (on x86_64) not always generated

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110588

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Roger Sayle <sayle@gcc.gnu.org>:

https://gcc.gnu.org/g:43a0a5cd57eefd5a5bbead606ec4f6959af31802

commit r14-2528-g43a0a5cd57eefd5a5bbead606ec4f6959af31802
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Fri Jul 14 18:21:56 2023 +0100

    PR target/110588: Add *bt<mode>_setncqi_2 to generate btl on x86.

    This patch resolves PR target/110588 to catch another case in combine
    where the i386 backend should be generating a btl instruction.  This adds
    another define_insn_and_split to recognize the RTL representation for this
    case.

    I also noticed that two related define_insn_and_split weren't using the
    preferred string style for single statement preparation-statements, so
    I've reformatted these to be consistent in style with the new one.

    2023-07-14  Roger Sayle  <roger@nextmovesoftware.com>

    gcc/ChangeLog
            PR target/110588
            * config/i386/i386.md (*bt<mode>_setcqi): Prefer string form
            preparation statement over braces for a single statement.
            (*bt<mode>_setncqi): Likewise.
            (*bt<mode>_setncqi_2): New define_insn_and_split.

    gcc/testsuite/ChangeLog
            PR target/110588
            * gcc.target/i386/pr110588.c: New test case.