Re: toolchain/58411: GCC/x86_64 10.5 and 12.4 miscompile GCC/sh3 12.4

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

On 2024/08/11 17:07, matthew green wrote:
> i've commited the main GCC 12.x sh fix to -current.

Thanks!!

> while looking at the recent GCC changes in gcc/config/sh/ i noticed these
> three that look interesting:
>
>     https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=f49267e1636872128249431e9e5d20c0908b7e8e
>
> which seems to fix some optimisation pass issues, and could be merged into
> our GCC 12 i think.
>
>     https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=58b78cf068b3b24c11d7812a5f4de865e9cdb8b4
>
> which looks like the future has some code-size reduction coming, but
> maybe not until GCC 14 or 15...

I've confirmed that there's no new regression for ATF on landisk
built with GCC 12.4, both with and without these changes.

Also, some pkgsrc's can be built natively on system built with
these upstream commits.

Would it be better to cherry-pick these commits now?

I believe we're ready to switch sh3 to gcc 12.4, anyway :)

Thanks,
rin