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From: "goon.pri.low at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/112662] missed-optimization: loop increment until
 wrap
Date: Sat, 30 Dec 2023 16:21:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112662

--- Comment #2 from gooncreeper <goon.pri.low at gmail dot com> ---
I believe I got my initial optimized function wrong, it should actually be =
this


unsigned opt(unsigned a) {
    if (++a > 999) a =3D 0;
    return a;
}

opt:
        lea     eax, [rdi+1]
        xor     edx, edx
        cmp     eax, 1000
        cmovnb  eax, edx
        ret

Which is a bit more clear also.=