Re: [PATCH] i386: Fix up @xorsign3_1 [PR102224]

[Jakub Jelinek via Gcc-patches]

On Wed, Sep 08, 2021 at 06:00:50PM +0800, Hongtao Liu wrote:
> And I find paradoxical subreg like (subreg:V4SF (reg:SF)) are not
> allowed by validate_subreg until r11-621.

My reading of the r11-621 change is that it allowed (subreg:V4SF (reg:V2SF) 0)
but that (subreg:V4SF (reg:SF) 0) has been valid even before that.
In any case, the PR89984 fix was a missed-optimization fix, so we don't need
to backport that and thus don't need to backport the follow-up patch either.

        Jakub