[Bug tree-optimization/66012] Sub-optimal 64bit load is generated instead of zero-extension

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66012

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Happens on aarch64 also:
test:
        adrp    x0, l
        add     x1, x0, :lo12:l
        ldr     x1, [x1, 8]
        ldr     w0, [x0, #:lo12:l]
        orr     x0, x0, x1, lsl 32
        ret