[Bug target/95766] Failure to directly use vpbroadcastd for _mm_set1_epi32 when passing unsigned short

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95766

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Incoming RTL:

(note 5 1 2 2 [bb 2] NOTE_INSN_BASIC_BLOCK)
(insn 2 5 3 2 (set (reg:SI 86)
        (reg:SI 5 di [ a ])) "t.c":3:1 -1
     (nil))
(insn 3 2 4 2 (set (reg/v:HI 85 [ a ])
        (subreg:HI (reg:SI 86) 0)) "t.c":3:1 -1
     (nil))
(note 4 3 7 2 NOTE_INSN_FUNCTION_BEG)
(insn 7 4 8 2 (set (reg:SI 82 [ _1 ])
        (zero_extend:SI (reg/v:HI 85 [ a ]))) "t.c":4:12 -1
     (nil))

that doesn't reflect the ABI, but I'm not sure we can do much better here.
The zero_extend is from the GIMPLE conversion.