From: Jakub Jelinek <jakub@redhat.com>
To: Uros Bizjak <ubizjak@gmail.com>,
Richard Biener <rguenther@suse.de>,
Jeff Law <jeffreyalaw@gmail.com>, "H.J. Lu" <hjl.tools@gmail.com>
Cc: gcc-patches@gcc.gnu.org
Subject: [PATCH] x86: Define LIBGCC2_UNWIND_ATTRIBUTE on ia32 [PR104781]
Date: Tue, 8 Mar 2022 18:35:14 +0100 [thread overview]
Message-ID: <YieT0l9915XwHt7c@tucnak> (raw)
In-Reply-To: <CAMe9rOosJO5wz5=ZibD-sL_JL+uAoc+-m4B4BT8AK1g5jc619g@mail.gmail.com>
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
next prev parent reply other threads:[~2022-03-08 17:35 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 ` Jakub Jelinek [this message]
2022-03-08 17:49 ` [PATCH] x86: Define LIBGCC2_UNWIND_ATTRIBUTE on ia32 [PR104781] H.J. Lu
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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