From: "H.J. Lu" <hjl.tools@gmail.com>
To: Richard Guenther <richard.guenther@gmail.com>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: PATCH [1/n]: Prepare x32: PR middle-end/47364: internal compiler error: in emit_move_insn, at expr.c:3355
Date: Sun, 12 Jun 2011 16:41:00 -0000 [thread overview]
Message-ID: <BANLkTinJjDcPd+onwb4=E3p0KVZVu8YKXA@mail.gmail.com> (raw)
In-Reply-To: <BANLkTik-7forNtBN9i27aTeN+NuCtVyBew@mail.gmail.com>
On Sun, Jun 12, 2011 at 7:33 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Sun, Jun 12, 2011 at 7:00 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> On Sun, Jun 12, 2011 at 6:50 AM, Richard Guenther
>> <richard.guenther@gmail.com> wrote:
>>> On Sun, Jun 12, 2011 at 3:18 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>>>> On Sun, Jun 12, 2011 at 3:48 AM, Richard Guenther
>>>> <richard.guenther@gmail.com> wrote:
>>>>> On Sat, Jun 11, 2011 at 5:09 PM, H.J. Lu <hongjiu.lu@intel.com> wrote:
>>>>>> Hi,
>>>>>>
>>>>>> expand_builtin_strlen has
>>>>>>
>>>>>> src_reg = gen_reg_rtx (Pmode);
>>>>>> ...
>>>>>> pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
>>>>>> if (pat != src_reg)
>>>>>> emit_move_insn (src_reg, pat);
>>>>>>
>>>>>> But src_reg may be in ptr_mode, wich may not be the same as Pmode.
>>>>>> This patch checks it. OK for trunk?
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>>
>>>>>> H.J.
>>>>>> ---
>>>>>> 2011-06-11 H.J. Lu <hongjiu.lu@intel.com>
>>>>>>
>>>>>> PR middle-end/47364
>>>>>> * builtins.c (expand_builtin_strlen): Properly handle target
>>>>>> not in Pmode.
>>>>>>
>>>>>> diff --git a/gcc/builtins.c b/gcc/builtins.c
>>>>>> index 7b24a0c..4e2cf31 100644
>>>>>> --- a/gcc/builtins.c
>>>>>> +++ b/gcc/builtins.c
>>>>>> @@ -2941,7 +2941,11 @@ expand_builtin_strlen (tree exp, rtx target,
>>>>>> start_sequence ();
>>>>>> pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
>>>>>> if (pat != src_reg)
>>>>>> - emit_move_insn (src_reg, pat);
>>>>>> + {
>>>>>> + if (GET_MODE (pat) != Pmode)
>>>>>> + pat = convert_to_mode (Pmode, pat, 1);
>>>>>
>>>>> Shouldn't this be POINTERS_EXTEND_UNSIGNED instead of 1?
>>>>>
>>>>>> + emit_move_insn (src_reg, pat);
>>>>>
>>>>> Why not use convert_move unconditionally?
>>>>>
>>>>> Or, why not expand src in Pmode from the start? After all, src_reg is
>>>>> created as Pmode reg.
>>>>>
>>>>
>>>> This patch works for my testcase. OK for trunk?
>>>
>>> Ok if it passes bootstrap & regtest on a ptr_mode != Pmode target.
>>>
>>
>> Only the following targets expand strlen:
>>
>> avr/avr.md:(define_expand "strlenhi"
>> avr/avr.md:(define_insn "*strlenhi"
>> i386/i386.md:(define_expand "strlen<mode>"
>> i386/i386.md: if (ix86_expand_strlen (operands[0], operands[1],
>> operands[2], operands[3]))
>> i386/i386.md:(define_expand "strlenqi_1"
>> i386/i386.md:(define_insn "*strlenqi_1"
>> rs6000/rs6000.md:(define_expand "strlensi"
>> s390/s390.md:; strlenM instruction pattern(s).
>> s390/s390.md:(define_expand "strlen<mode>"
>> s390/s390.md:(define_insn "*strlen<mode>"
>>
>> None of them, except for my x32 port, are ptr_mode != Pmode targets.
>> I will bootstrap and test it on my x32 branch.
>>
>
> It doesn't work on x32. I got
>
> /export/gnu/import/git/gcc-x32/libssp/gets-chk.c:74:14: internal
> compiler error: in emit_move_insn, at expr.c:3319
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
>
> How about this patch?
>
> Thanks.
No regressions on x32 branch. OK for trunk?
Thanks.
> --
> H.J.
> ---
> 2011-06-12 H.J. Lu <hongjiu.lu@intel.com>
>
> PR middle-end/47364
> * builtins.c (expand_builtin_strlen): Properly handle target
> not in Pmode.
>
> diff --git a/gcc/builtins.c b/gcc/builtins.c
> index 7b24a0c..a2f175d 100644
> --- a/gcc/builtins.c
> +++ b/gcc/builtins.c
> @@ -2941,7 +2941,14 @@ expand_builtin_strlen (tree exp, rtx target,
> start_sequence ();
> pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
> if (pat != src_reg)
> - emit_move_insn (src_reg, pat);
> + {
> +#ifdef POINTERS_EXTEND_UNSIGNED
> + if (GET_MODE (pat) != Pmode)
> + pat = convert_to_mode (Pmode, pat,
> + POINTERS_EXTEND_UNSIGNED);
> +#endif
> + emit_move_insn (src_reg, pat);
> + }
> pat = get_insns ();
> end_sequence ();
>
--
H.J.
next prev parent reply other threads:[~2011-06-12 16:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-11 15:37 H.J. Lu
2011-06-12 11:00 ` Richard Guenther
2011-06-12 13:35 ` H.J. Lu
2011-06-12 14:33 ` Richard Guenther
2011-06-12 14:54 ` H.J. Lu
2011-06-12 15:01 ` H.J. Lu
2011-06-12 16:41 ` H.J. Lu [this message]
2011-06-14 15:22 ` Richard Guenther
2011-06-14 16:53 ` H.J. Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='BANLkTinJjDcPd+onwb4=E3p0KVZVu8YKXA@mail.gmail.com' \
--to=hjl.tools@gmail.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=richard.guenther@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).