Re: [x86_64 PATCH] Use [(const_int 0)] idiom consistently in i386.md

[Uros Bizjak via Gcc-patches]

On Wed, May 10, 2023 at 9:20 PM Roger Sayle <ro...@nextmovesoftware.com> wrote:
>
>
> Hi Uros,
> This cleans up the use of [(clobber (const_int 0))] in the i386 backend.
> My apologies I must have copied this idiom from one of the other targets:
> aarch64.md, arm.md, thumb1.md, avr.md, or sparc.md.
>
> This patch has been tested on x86_64-pc-linux-gnu with make bootstrap
> and make -k check, both with and without --target_board=unix{-m32}
> with no new failures.  Ok for mainline?
>
>
> 2023-05-10  Roger Sayle  <ro...@nextmovesoftware.com>
>
> gcc/ChangeLog
>         * config/i386/i386.md (*concat<mode><dwi>3_1): Use preferred
>         [(const_int 0)] idiom, instead of [(clobber (const_int 0))].
>         (*concat<mode><dwi>3_2): Likewise.
>         (*concat<mode><dwi>3_3): Likewise.
>         (*concat<mode><dwi>3_4): Likewise.
>         (*concat<mode><dwi>3_5): Likewise.
>         (*concat<mode><dwi>3_6): Likewise.
>         (*concat<mode><dwi>3_7): Likewise.

OK, even as an obvious patch.

Thanks,
Uros.

>
>
> Thanks,
> Roger
> --
>