[Bug target/71775] Redundant move instruction for sign extension

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71775

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

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

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On aarch64-linux-gnu with the trunk we get:
.L3:
        rbit    x3, x0
        sub     x1, x0, #1
        clz     x3, x3
        eor     x2, x2, x3
        ands    x0, x0, x1
        bne     .L3


There is no zero or sign extend.