From: Uros Bizjak <ubizjak@gmail.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] Fix ix86_split_long_move collision handling with TLS (PR target/66470)
Date: Tue, 09 Jun 2015 14:21:00 -0000 [thread overview]
Message-ID: <CAFULd4ZVP0UVe7SzGk0aZLMcJ3qfQ=-TThK03GR5_FbB7U=_LQ@mail.gmail.com> (raw)
In-Reply-To: <20150609133905.GB10247@tucnak.redhat.com>
On Tue, Jun 9, 2015 at 3:39 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Tue, Jun 09, 2015 at 03:21:55PM +0200, Uros Bizjak wrote:
>> I'm afraid that simple scan loop won't work correctly on x32. There
>> are some issues with UNSPEC_TP for this target, so we have to generate
>> zero_extend of SImode UNSPEC, e.g.:
>>
>> (plus:DI (zero_extend:DI (unspec:SI [...] UNSPEC_TP) (reg:DI ...))
>>
>> as can be seen in get_thread_pointer to construct the address. It
>> looks that your loop won't find the UNSPEC_TP tag in the above case.
>
> You're right, for -m32 it would need to start with
> rtx *x = &addr;
> + while (GET_CODE (*x) == ZERO_EXTEND
> + || GET_CODE (*x) == AND
> + || GET_CODE (*x) == SUBREG)
> + x = &XEXP (*x, 0);
Oh, you can use SImode_address_operand predicate here.
Uros.
next prev parent reply other threads:[~2015-06-09 14:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 12:05 Jakub Jelinek
2015-06-09 12:32 ` Uros Bizjak
2015-06-09 12:57 ` Jakub Jelinek
2015-06-09 13:26 ` Uros Bizjak
2015-06-09 13:44 ` Jakub Jelinek
2015-06-09 14:06 ` Uros Bizjak
2015-06-09 14:21 ` Uros Bizjak [this message]
2015-06-09 14:44 ` Jakub Jelinek
2015-06-09 16:19 ` Uros Bizjak
2015-06-09 16:57 ` Jakub Jelinek
2015-06-09 19:17 ` Uros Bizjak
2015-06-09 20:11 ` Jakub Jelinek
2015-06-10 6:38 ` Uros Bizjak
2015-06-10 6:43 ` Richard Sandiford
2015-06-10 7:07 ` Jakub Jelinek
2015-06-10 7:13 ` Uros Bizjak
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