[Bug target/82853] Optimize x % 3 == 0 without modulo

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82853

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Target|                            |x86_64-*-*
          Component|tree-optimization           |target

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Works for me on aarch64:
f:
        mov     w1, 21846
        movk    w1, 0x5555, lsl 16
        smull   x1, w0, w1
        lsr     x1, x1, 32
        sub     w1, w1, w0, asr 31
        add     w1, w1, w1, lsl 1
        sub     w0, w0, w1
        ret

Most likely a target cost issue.