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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/98143] arm: missed vectorization with MVE compared to Neon
Date: Wed, 21 Apr 2021 15:31:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98143

--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Current trunk generates for MVE:

        ldr     r3, .L3+16      @ 5     [c=3D12 l=3D4]  *thumb2_movsi_vfp/5
        vldr.64 d6, .L3 @ 7     [c=3D8 l=3D4]  *mve_movv8hi/8
        vldr.64 d7, .L3+8
        ldr     r3, [r3]        @ 14    [c=3D12 l=3D4]  *thumb2_movsi_vfp/5
        mov     r2, r3  @ 17    [c=3D4 l=3D2]  *thumb2_movsi_vfp/0
        adds    r3, r3, #16     @ 18    [c=3D4 l=3D2]  *thumb2_addsi_short/1
        vstrh.16        q3, [r2]        @ 8     [c=3D8 l=3D4]=20
*movmisalignv8hi_mve_store
        vstrh.16        q3, [r3]        @ 11    [c=3D8 l=3D4]=20
*movmisalignv8hi_mve_store
        bx      lr      @ 45    [c=3D8 l=3D4]  *thumb2_return
.L4:
        .align  3
.L3:
        .short  3
        .short  3
        .short  3
        .short  3
        .short  3
        .short  3
        .short  3
        .short  3=