From: Denis Chertykov <chertykov@gmail.com>
To: Georg-Johann Lay <avr@gjlay.de>
Cc: Richard Henderson <rth@redhat.com>,
gcc-patches@gcc.gnu.org, Anatoly Sokolov <aesok@post.ru>,
"Eric B. Weddington" <eric.weddington@atmel.com>
Subject: Re: [Patch, AVR]: Fix PR46779
Date: Mon, 27 Jun 2011 08:41:00 -0000 [thread overview]
Message-ID: <BANLkTim3q=v5dc-ja6bHjvzVAtAf-PVy0g@mail.gmail.com> (raw)
In-Reply-To: <4E078F93.7060901@gjlay.de>
2011/6/26 Georg-Johann Lay <avr@gjlay.de>:
> Denis Chertykov schrieb:
>>
>> 2011/6/24 Richard Henderson <rth@redhat.com>:
>>
>>> On 06/23/2011 01:15 PM, Denis Chertykov wrote:
>>>
>>>>> text data bss dec hex filename
>>>>> 10032 25 0 10057 2749 bld-avr-orig/gcc/z.o
>>>>> 5816 25 0 5841 16d1 bld-avr-new/gcc/z.o
>>>>
>>>> Richard, can you send me this z.c file ?
>>>> Right now I'm notice that new code is worse.
>>>
>>> That's gcc.c-torture/compile/950612-1.c.
>>
>> I have founded that postreload optimizations can't handle results of
>> new L_R_A code.
>> I think that it's can be handled by CSE (postreload).
> Did you try to add constraint alternative to *addhi3?
> Like "*!d,d,n" or even "*!r,r,n"
>
> I saw some code improvement with that alternative.
I'm trying:
(define_insn "*addhi3"
[(set (match_operand:HI 0 "register_operand" "=r,!w,!w,d,r,r,!d")
(plus:HI
(match_operand:HI 1 "register_operand" "%0,0,0,0,0,0,!r")
(match_operand:HI 2 "nonmemory_operand" "r,I,J,i,P,N,!ri")))]
""
"@
add %A0,%A2\;adc %B0,%B2
adiw %A0,%2
sbiw %A0,%n2
subi %A0,lo8(-(%2))\;sbci %B0,hi8(-(%2))
sec\;adc %A0,__zero_reg__\;adc %B0,__zero_reg__
sec\;sbc %A0,__zero_reg__\;sbc %B0,__zero_reg__
#"
[(set_attr "length" "2,1,1,2,3,3,4")
(set_attr "cc" "set_n,set_czn,set_czn,set_czn,set_n,set_n,set_n")])
;; Special split three addressing addhi3
;; to make postreload optimization possible
(define_split ; addhi3 !d,!r,!ri
[(set (match_operand:HI 0 "d_register_operand" "")
(plus:HI (match_operand:HI 1 "register_operand" "")
(match_operand:HI 2 "nonmemory_operand" "")))]
"reload_completed"
[(set (match_dup 0) (match_dup 2))
(set (match_dup 0) (plus:HI (match_dup 0) (match_dup 1)))]
"")
The main problem for me is that the new addressing mode produce a
worse code in many tests.
Although, results for gcc.c-torture/compile/950612-1.c is
significantly better with new addressing.
Denis.
next prev parent reply other threads:[~2011-06-27 5:08 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 17:24 Georg-Johann Lay
2011-06-09 18:50 ` Denis Chertykov
2011-06-09 19:43 ` Georg-Johann Lay
2011-06-09 19:51 ` Denis Chertykov
2011-06-10 10:23 ` Georg-Johann Lay
2011-06-12 10:34 ` Denis Chertykov
2011-06-13 18:10 ` Georg-Johann Lay
2011-06-13 22:37 ` Denis Chertykov
2011-06-14 10:39 ` Georg-Johann Lay
2011-06-14 11:38 ` Denis Chertykov
2011-06-14 21:38 ` Georg-Johann Lay
2011-06-14 23:04 ` Richard Henderson
2011-06-15 17:58 ` Richard Henderson
2011-06-15 21:58 ` Georg-Johann Lay
2011-06-15 22:20 ` Richard Henderson
2011-06-16 3:46 ` Richard Henderson
2011-06-16 11:37 ` Denis Chertykov
2011-06-16 12:01 ` Denis Chertykov
2011-06-16 14:07 ` Richard Henderson
2011-06-16 18:18 ` Denis Chertykov
2011-06-16 18:57 ` Richard Henderson
2011-06-16 19:33 ` Denis Chertykov
2011-06-16 19:42 ` Richard Henderson
2011-06-16 20:04 ` Denis Chertykov
2011-06-16 14:36 ` Richard Henderson
2011-06-16 14:52 ` Bernd Schmidt
2011-06-16 15:13 ` Richard Henderson
2011-06-16 18:57 ` Denis Chertykov
2011-06-23 20:48 ` Denis Chertykov
2011-06-23 22:04 ` Richard Henderson
2011-06-26 20:03 ` Denis Chertykov
2011-06-26 20:51 ` Georg-Johann Lay
2011-06-27 8:41 ` Denis Chertykov [this message]
2011-06-27 9:19 ` Georg-Johann Lay
2011-06-27 10:17 ` Denis Chertykov
2011-07-07 9:59 ` Georg-Johann Lay
2011-07-07 18:21 ` Denis Chertykov
2011-07-08 10:12 ` Georg-Johann Lay
2011-07-08 10:25 ` Denis Chertykov
2011-07-08 12:16 ` Georg-Johann Lay
2011-06-22 3:28 ` Hans-Peter Nilsson
2011-06-22 17:03 ` Georg-Johann Lay
2011-06-23 12:51 ` Hans-Peter Nilsson
2011-06-23 13:00 ` Hans-Peter Nilsson
2011-06-09 20:03 ` Georg-Johann Lay
2011-06-10 9:27 ` Georg-Johann Lay
2011-06-21 17:17 ` Georg-Johann Lay
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='BANLkTim3q=v5dc-ja6bHjvzVAtAf-PVy0g@mail.gmail.com' \
--to=chertykov@gmail.com \
--cc=aesok@post.ru \
--cc=avr@gjlay.de \
--cc=eric.weddington@atmel.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=rth@redhat.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).