wrong code for cast static_array->vector

[9il]

auto bar3(ref ubyte[64] a, ref ubyte[64] b)
{
    a = (cast(__vector(ubyte[64]))b).array;
}

for -mcpu=haswell

pure nothrow @nogc @safe void example.bar3(ref ubyte[64], ref ubyte[64]):
        vpbroadcastb    ymm0, byte ptr [rdi]
        vmovdqu ymmword ptr [rsi + 32], ymm0
        vmovdqu ymmword ptr [rsi], ymm0
        vzeroupper
        ret

expected

pure nothrow @nogc @safe void example.bar4(ref __vector(ubyte[64]), ref ubyte[64]):
        vmovups ymm0, ymmword ptr [rdi]
        vmovups ymm1, ymmword ptr [rdi + 32]
        vmovups ymmword ptr [rsi + 32], ymm1
        vmovups ymmword ptr [rsi], ymm0
        vzeroupper
        ret

expected is generated from:

auto bar4(ref __vector(ubyte[64]) a, ref ubyte[64] b)
{
    a.array[] = b;
}

[kinke]

Thx for the report, that's clearly wrong. - In case this is no toy example and an attempted manual optimization, simply assigning the static array via a = b results in the same expected asm.

[9il]

Thank you!