From: "H.J. Lu" <hjl.tools@gmail.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Uros Bizjak <ubizjak@gmail.com>,
Richard Biener <rguenther@suse.de>,
Jeff Law <jeffreyalaw@gmail.com>,
gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] x86: Define LIBGCC2_UNWIND_ATTRIBUTE on ia32 [PR104781]
Date: Tue, 8 Mar 2022 09:49:11 -0800 [thread overview]
Message-ID: <CAMe9rOrmJih2TRxd8VkJikRD34TMKGEbd73D+kHQx04ZX5CnbQ@mail.gmail.com> (raw)
In-Reply-To: <YieT0l9915XwHt7c@tucnak>
On Tue, Mar 8, 2022 at 9:35 AM Jakub Jelinek <jakub@redhat.com> wrote:
>
> On Tue, Mar 08, 2022 at 08:09:25AM -0800, H.J. Lu wrote:
> > > Ok. So, what do you think about replacing the libgcc/ part of your patch
> > > with that
> > > /* __builtin_eh_return can't handle stack realignment, so disable SSE in
> > > 32-bit libgcc functions that call it. */
> > > #ifndef __x86_64__
> > > #define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((target ("no-sse")))
> > > #endif
> > > ?
> >
> > Yes, it should work.
>
> So, how do we move on with this?
> I can't self-approve my own patch, so can anyone please ack the following
> provided it passes bootstraps/regtests ({x86_64,i686}-linux) that are
> currently pending?
>
> That can go in independently from your patch, and if it is committed,
> your V3 patch with the libgcc/ hunks removed is preapproved for trunk.
>
> 2022-03-08 Jakub Jelinek <jakub@redhat.com>
>
> PR target/104781
> * config/i386/i386.h (LIBGCC2_UNWIND_ATTRIBUTE): Define for ia32.
>
> --- gcc/config/i386/i386.h.jj 2022-02-25 12:06:45.535493490 +0100
> +++ gcc/config/i386/i386.h 2022-03-08 11:20:43.207043370 +0100
> @@ -2848,6 +2848,12 @@ extern enum attr_cpu ix86_schedule;
> #define NUM_X86_64_MS_CLOBBERED_REGS 12
> #endif
>
> +/* __builtin_eh_return can't handle stack realignment, so disable SSE in
> + 32-bit libgcc functions that call it. */
> +#ifndef __x86_64__
> +#define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((target ("no-sse")))
> +#endif
> +
> /*
> Local variables:
> version-control: t
>
>
> Jakub
>
LGTM.
Thanks.
--
H.J.
next prev parent reply other threads:[~2022-03-08 17:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-07 15:06 [PATCH v3] x86: Disable SSE on unwind-c.c and unwind-dw2.c H.J. Lu
2022-03-08 10:23 ` Jakub Jelinek
2022-03-08 11:15 ` Jakub Jelinek
2022-03-08 12:29 ` Jakub Jelinek
2022-03-08 12:49 ` Eric Botcazou
2022-03-08 15:37 ` H.J. Lu
2022-03-08 15:46 ` Jakub Jelinek
2022-03-08 16:09 ` H.J. Lu
2022-03-08 17:35 ` [PATCH] x86: Define LIBGCC2_UNWIND_ATTRIBUTE on ia32 [PR104781] Jakub Jelinek
2022-03-08 17:49 ` H.J. Lu [this message]
2022-03-09 7:18 ` Richard Biener
2022-03-09 9:59 ` [PATCH] x86, v2: " Jakub Jelinek
2022-03-09 11:30 ` Richard Biener
2022-03-08 17:50 ` [PATCH] x86: " H.J. Lu
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