Re: [arm] MVE: Relax addressing modes for full loads and stores

[Andre Vieira (lists) via Gcc-patches]

On 17/01/2022 07:48, Christophe Lyon wrote:

Hi André,

On Fri, Jan 14, 2022 at 6:03 PM Andre Vieira (lists) via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:

    Hi Christophe,

    This patch relaxes the addressing modes for the mve full load and
    stores
    (by full loads and stores I mean non-widening or narrowing loads and
    stores resp). The code before was requiring a LO_REGNUM for these,
    where
    this is only a requirement if the load is widening or the store
    narrowing.

    So with this your patch should not be necessary.

    Regression tested on arm-none-eabi-gcc.  Can you please confirm this
    fixes the issue you were seeing too?

Yes, I confirm this fixes the problem I was fixing with my patch #15 in my MVE/VCMP/VCOND series.

I'll drop it.

Thanks!

Christophe


    gcc/ChangeLog:

             * config/arm/arm.h (MVE_STN_LDW_MODE): New MACRO.
             * config/arm/arm.c (mve_vector_mem_operand): Relax
    constraint on
             base register for non widening loads or narrowing stores.


    Kind Regards,
    Andre Vieira

Ping, I noticed this also fixes PR 104790.

Kind regards,
Andre