[Issue 23084] [REG 2.080] dmd: src/dmd/backend/cgxmm.d:816: Assertion `0' failed.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23084

--- Comment #7 from Iain Buclaw <ibuclaw at gdcproject.org> ---
Original test simplified:
---
__vector(int[4]) _mm_packs_epi32 (__vector(int[4]) a) {
    __vector(short[8]) r = cast(short)(a.array[0]);
    return cast(__vector(int[4]))r;
}

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