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* [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional
@ 2003-07-29 13:34 rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 13:40 ` [Bug optimization/11707] " pinskia at physics dot uc dot edu
` (24 more replies)
0 siblings, 25 replies; 30+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2003-07-29 13:34 UTC (permalink / raw)
To: gcc-bugs
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
Summary: constants not propagated in unrolled loop iterations
with a conditional
Product: gcc
Version: 3.4
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at tat dot physik dot uni-tuebingen dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
The following testcase fails to cprop:
int foo2()
{
unsigned int n = 5, i;
int a = 1;
for (i=0; i<2; ++i) {
n /= 2;
if (n)
a *= a;
}
return a;
}
while if omitting the if (n) check which is always true, cprop works and
the result is computed at compile time.
The lack of this optimization hurts optimization of libstdc++ pow(T, int)
implementation.
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
@ 2003-07-29 13:40 ` pinskia at physics dot uc dot edu
2003-07-29 13:45 ` rguenth at tat dot physik dot uni-tuebingen dot de
` (23 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-29 13:40 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |pessimizes-code
Priority|P2 |P3
Last reconfirmed|0000-00-00 00:00:00 |2003-07-29 13:40:27
date| |
Target Milestone|3.4 |---
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-29 13:40 -------
I can confirm this on the mainline (20030729) but with the rtlopt branch, gcc produces great code:
_foo2:
li r3,1
blr
(which is just return 1; for you non powerpc asm readers.)
Also with the tree-ssa branch (20030718) with -funroll-loops, gcc produces the same code as
above.
So when either rtlopt or tree-ssa branch is rolled into gcc, this will be fixed.
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 13:40 ` [Bug optimization/11707] " pinskia at physics dot uc dot edu
@ 2003-07-29 13:45 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 14:07 ` rguenth at tat dot physik dot uni-tuebingen dot de
` (22 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2003-07-29 13:45 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2003-07-29 13:45 -------
Subject: Re: constants not propagated in unrolled
loop iterations with a conditional
On 29 Jul 2003, pinskia at physics dot uc dot edu wrote:
> I can confirm this on the mainline (20030729) but with the rtlopt branch, gcc produces great code:
> _foo2:
> li r3,1
> blr
> (which is just return 1; for you non powerpc asm readers.)
> Also with the tree-ssa branch (20030718) with -funroll-loops, gcc produces the same code as
> above.
>
> So when either rtlopt or tree-ssa branch is rolled into gcc, this will be fixed.
This probably means its not going to be fixed for 3.4? Can you assign the
PR to Zdenek Dvorak? Maybe there are a few hunks from rtlopt that fixes
this.
Richard.
--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 13:40 ` [Bug optimization/11707] " pinskia at physics dot uc dot edu
2003-07-29 13:45 ` rguenth at tat dot physik dot uni-tuebingen dot de
@ 2003-07-29 14:07 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 14:13 ` [Bug optimization/11707] [3.4 Regression] [new unroller] " pinskia at physics dot uc dot edu
` (21 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2003-07-29 14:07 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
rguenth at tat dot physik dot uni-tuebingen dot de changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|enhancement |normal
------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2003-07-29 14:07 -------
This is actually a regression from 2.95.3 (-O2 -funroll-loops):
gcc2_compiled.:
.text
.align 16
.globl foo2
.type foo2,@function
foo2:
pushl %ebp
movl %esp,%ebp
movl $1,%eax
movl %ebp,%esp
popl %ebp
ret
and a regression from 3.3 to which this is a regression from 2.92.3:
.text
.p2align 4,,15
.globl foo2
.type foo2, @function
foo2:
pushl %ebp
movl $1, %eax # a
movl %esp, %ebp
popl %ebp
imull %eax, %eax # a, a
ret
and of course worst for gcc3.4:
.text
.p2align 4,,15
.globl foo2
.type foo2, @function
foo2:
pushl %ebp #
movl $5, %eax #, n
shrl %eax # tmp62
testl %eax, %eax # n
movl %esp, %ebp #,
movl $1, %edx #, a
je .L11 #,
imull %edx, %edx # a, a
.L11:
shrl %eax # n
testl %eax, %eax # n
je .L4 #,
imull %edx, %edx # a, a
.L4:
popl %ebp #
movl %edx, %eax # a, <result>
ret
With gcc3.4 and -fold-unroll-loops we get back to 2.95.3 code:
.text
.p2align 4,,15
.globl foo2
.type foo2, @function
foo2:
pushl %ebp #
movl $1, %eax #, <result>
movl %esp, %ebp #,
popl %ebp #
ret
So can this be targeted at 3.3 and marked as regression? Thanks.
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (2 preceding siblings ...)
2003-07-29 14:07 ` rguenth at tat dot physik dot uni-tuebingen dot de
@ 2003-07-29 14:13 ` pinskia at physics dot uc dot edu
2003-09-29 13:54 ` rakdver at gcc dot gnu dot org
` (20 subsequent siblings)
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From: pinskia at physics dot uc dot edu @ 2003-07-29 14:13 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |critical
Priority|P3 |P1
Summary|constants not propagated in |[3.4 Regression] [new
|unrolled loop iterations |unroller] constants not
|with a conditional |propagated in unrolled loop
| |iterations with a
| |conditional
Target Milestone|--- |3.4
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (3 preceding siblings ...)
2003-07-29 14:13 ` [Bug optimization/11707] [3.4 Regression] [new unroller] " pinskia at physics dot uc dot edu
@ 2003-09-29 13:54 ` rakdver at gcc dot gnu dot org
2003-09-29 14:14 ` rakdver at gcc dot gnu dot org
` (19 subsequent siblings)
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From: rakdver at gcc dot gnu dot org @ 2003-09-29 13:54 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
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rakdver at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rakdver at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
------- Additional Comments From rakdver at gcc dot gnu dot org 2003-09-29 12:30 -------
Created an attachment (id=4860)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4860&action=view)
Patch moving the jump bypassing after loop optimizer
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (4 preceding siblings ...)
2003-09-29 13:54 ` rakdver at gcc dot gnu dot org
@ 2003-09-29 14:14 ` rakdver at gcc dot gnu dot org
2003-09-29 14:39 ` rguenth at tat dot physik dot uni-tuebingen dot de
` (18 subsequent siblings)
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From: rakdver at gcc dot gnu dot org @ 2003-09-29 14:14 UTC (permalink / raw)
To: gcc-bugs
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------- Additional Comments From rakdver at gcc dot gnu dot org 2003-09-29 12:31 -------
This is just a pass ordering problem. Copy propagation in jump bypassing
is being run between old and new loop unroller; so it acts on already unrolled
loop with -fold-unroll-loops, but is not able to do anything senseful
with -funroll-loops.
On rtlopt-branch I have moved unroller before jump bypassing, this is why it
does not reproduce there.
On tree-ssa constant propagation is able to detect that a*=a is no-op in this
case. Cool.
Anyway, the attached patch fixes the problem. I believe moving jump bypassing
after unroller should not harm anything.
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (5 preceding siblings ...)
2003-09-29 14:14 ` rakdver at gcc dot gnu dot org
@ 2003-09-29 14:39 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-09-29 16:48 ` rguenth at tat dot physik dot uni-tuebingen dot de
` (17 subsequent siblings)
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From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2003-09-29 14:39 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2003-09-29 14:14 -------
Subject: Re: [3.4 Regression] [new unroller] constants
not propagated in unrolled loop iterations with a conditional
On 29 Sep 2003, rakdver at gcc dot gnu dot org wrote:
> Anyway, the attached patch fixes the problem. I believe moving jump bypassing
> after unroller should not harm anything.
This may be the fix for the 3.4 regression. What about the 3.3 regression?
I.e. the unneccessary imull produced on x86? This is a regression to
2.95.3 as noted in comment #3.
Maybe someone could look what is preventing constant folding from being
done here. Roger?
Thanks,
Richard.
--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (6 preceding siblings ...)
2003-09-29 14:39 ` rguenth at tat dot physik dot uni-tuebingen dot de
@ 2003-09-29 16:48 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-12-05 3:33 ` pinskia at gcc dot gnu dot org
` (16 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2003-09-29 16:48 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2003-09-29 16:01 -------
Subject: Re: [3.4 Regression] [new unroller] constants
not propagated in unrolled loop iterations with a conditional
On 29 Sep 2003, rakdver at gcc dot gnu dot org wrote:
> ------- Additional Comments From rakdver at gcc dot gnu dot org 2003-09-29 12:31 -------
> This is just a pass ordering problem. Copy propagation in jump bypassing
> is being run between old and new loop unroller; so it acts on already unrolled
> loop with -fold-unroll-loops, but is not able to do anything senseful
> with -funroll-loops.
>
> On rtlopt-branch I have moved unroller before jump bypassing, this is why it
> does not reproduce there.
>
> On tree-ssa constant propagation is able to detect that a*=a is no-op in this
> case. Cool.
>
> Anyway, the attached patch fixes the problem. I believe moving jump bypassing
> after unroller should not harm anything.
The attached patch fixes the regression to the 3.3 behavior which is still
a regression from 2.95.3 (unnecessary imull).
Richard.
--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (7 preceding siblings ...)
2003-09-29 16:48 ` rguenth at tat dot physik dot uni-tuebingen dot de
@ 2003-12-05 3:33 ` pinskia at gcc dot gnu dot org
2003-12-05 21:47 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
` (15 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-05 3:33 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-12-05 03:33 -------
Zdenek: did you ask for approval of this patch?
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2003-07-29 13:40:27 |2003-12-05 03:33:47
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (8 preceding siblings ...)
2003-12-05 3:33 ` pinskia at gcc dot gnu dot org
@ 2003-12-05 21:47 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2004-01-04 8:54 ` pinskia at gcc dot gnu dot org
` (14 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rakdver at atrey dot karlin dot mff dot cuni dot cz @ 2003-12-05 21:47 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2003-12-05 21:47 -------
Subject: Re: [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
IIRC, no.
Zdenek
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2003-12-05 03:33 -------
> Zdenek: did you ask for approval of this patch?
>
> --
> What |Removed |Added
> ----------------------------------------------------------------------------
> Last reconfirmed|2003-07-29 13:40:27 |2003-12-05 03:33:47
> date| |
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
>
> ------- You are receiving this mail because: -------
> You are the assignee for the bug, or are watching the assignee.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (9 preceding siblings ...)
2003-12-05 21:47 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
@ 2004-01-04 8:54 ` pinskia at gcc dot gnu dot org
2004-03-09 23:27 ` [Bug optimization/11707] [3.4/3.5 " mmitchel at gcc dot gnu dot org
` (13 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2004-01-04 8:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-01-04 08:54 -------
pressimizes-code is not a criticial bug, reducing severity.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|critical |normal
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (10 preceding siblings ...)
2004-01-04 8:54 ` pinskia at gcc dot gnu dot org
@ 2004-03-09 23:27 ` mmitchel at gcc dot gnu dot org
2004-03-09 23:28 ` mmitchel at gcc dot gnu dot org
` (12 subsequent siblings)
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From: mmitchel at gcc dot gnu dot org @ 2004-03-09 23:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-03-09 23:27 -------
This patch is too risky for 3.4.0, so I will postpone it until 3.4.1. However,
if someone would please test the patch on the 3.4 branch and confirm in this
audit trail that the patch works, bootstraps, etc., then we can include it for
3.4.1.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (11 preceding siblings ...)
2004-03-09 23:27 ` [Bug optimization/11707] [3.4/3.5 " mmitchel at gcc dot gnu dot org
@ 2004-03-09 23:28 ` mmitchel at gcc dot gnu dot org
2004-03-21 18:24 ` steven at gcc dot gnu dot org
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From: mmitchel at gcc dot gnu dot org @ 2004-03-09 23:28 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.0 |3.4.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (12 preceding siblings ...)
2004-03-09 23:28 ` mmitchel at gcc dot gnu dot org
@ 2004-03-21 18:24 ` steven at gcc dot gnu dot org
2004-06-18 23:41 ` [Bug rtl-optimization/11707] " mmitchel at gcc dot gnu dot org
` (10 subsequent siblings)
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From: steven at gcc dot gnu dot org @ 2004-03-21 18:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2004-03-21 18:24 -------
Zdenek, will you post this patch for inclusion on mainline?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (13 preceding siblings ...)
2004-03-21 18:24 ` steven at gcc dot gnu dot org
@ 2004-06-18 23:41 ` mmitchel at gcc dot gnu dot org
2004-08-10 1:38 ` pinskia at gcc dot gnu dot org
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From: mmitchel at gcc dot gnu dot org @ 2004-06-18 23:41 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-06-18 23:41 -------
Nobody has updated the PR to indicate that the patch has been tested; postponing
until GCC 3.4.2.
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.1 |3.4.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (14 preceding siblings ...)
2004-06-18 23:41 ` [Bug rtl-optimization/11707] " mmitchel at gcc dot gnu dot org
@ 2004-08-10 1:38 ` pinskia at gcc dot gnu dot org
2004-08-12 7:33 ` steven at gcc dot gnu dot org
` (8 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2004-08-10 1:38 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |critical
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4/3.5 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (15 preceding siblings ...)
2004-08-10 1:38 ` pinskia at gcc dot gnu dot org
@ 2004-08-12 7:33 ` steven at gcc dot gnu dot org
2004-08-29 19:02 ` [Bug rtl-optimization/11707] [3.4 " mmitchel at gcc dot gnu dot org
` (7 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: steven at gcc dot gnu dot org @ 2004-08-12 7:33 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2004-08-12 07:33 -------
Mainline produces this:
.file "t.c"
.text
.p2align 2,,3
.globl foo2
.type foo2, @function
foo2:
movl $1, %eax
ret
.size foo2, .-foo2
.ident "GCC: (GNU) 3.5.0 20040811 (experimental)"
.section .note.GNU-stack,"",@progbits
which means 3.5.0 does not fail.
--
What |Removed |Added
----------------------------------------------------------------------------
Known to fail|3.4.0 3.5.0 |3.4.0
Known to work|3.3 |3.3 3.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (16 preceding siblings ...)
2004-08-12 7:33 ` steven at gcc dot gnu dot org
@ 2004-08-29 19:02 ` mmitchel at gcc dot gnu dot org
2004-10-30 19:34 ` mmitchel at gcc dot gnu dot org
` (6 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-08-29 19:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-08-29 19:02 -------
Postponed until GCC 3.4.3.
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.2 |3.4.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (17 preceding siblings ...)
2004-08-29 19:02 ` [Bug rtl-optimization/11707] [3.4 " mmitchel at gcc dot gnu dot org
@ 2004-10-30 19:34 ` mmitchel at gcc dot gnu dot org
2004-11-01 0:45 ` mmitchel at gcc dot gnu dot org
` (5 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-10-30 19:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-10-30 19:34 -------
Postponed until GCC 3.4.4.
--
What |Removed |Added
----------------------------------------------------------------------------
Known to work|3.3 4.0 |3.3 4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (18 preceding siblings ...)
2004-10-30 19:34 ` mmitchel at gcc dot gnu dot org
@ 2004-11-01 0:45 ` mmitchel at gcc dot gnu dot org
2005-01-12 11:06 ` rguenth at tat dot physik dot uni-tuebingen dot de
` (4 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-11-01 0:45 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-11-01 00:45 -------
Postponed until GCC 3.4.4.
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.3 |3.4.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (19 preceding siblings ...)
2004-11-01 0:45 ` mmitchel at gcc dot gnu dot org
@ 2005-01-12 11:06 ` rguenth at tat dot physik dot uni-tuebingen dot de
2005-02-10 18:35 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2005-01-12 11:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2005-01-12 11:05 -------
I can re-confirm that the patch moves 3.4 to the state of 3.3 - i.e. with an
extra imull compared to 2.95 and 4.0. The patch has bootstrapped with checking
enabled and -funroll-loops on ia64, testing is in process. I'll formally submit
the patch shortly.
For the imull regression I'll file a separate bug with a possibly reduced testcase.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rakdver at gcc dot gnu dot
| |org
Known to fail|3.4.0 |3.4.0 3.4.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (20 preceding siblings ...)
2005-01-12 11:06 ` rguenth at tat dot physik dot uni-tuebingen dot de
@ 2005-02-10 18:35 ` rguenth at gcc dot gnu dot org
2005-02-10 18:36 ` steven at gcc dot gnu dot org
` (2 subsequent siblings)
24 siblings, 0 replies; 30+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2005-02-10 18:35 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rguenth at gcc dot gnu dot org 2005-02-10 12:46 -------
Patch at
http://gcc.gnu.org/ml/gcc-patches/2005-01/msg00656.html
pinged. Or WONTFIX - it's up to Mark.
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (21 preceding siblings ...)
2005-02-10 18:35 ` rguenth at gcc dot gnu dot org
@ 2005-02-10 18:36 ` steven at gcc dot gnu dot org
2005-05-19 17:24 ` mmitchel at gcc dot gnu dot org
2005-08-22 12:49 ` pinskia at gcc dot gnu dot org
24 siblings, 0 replies; 30+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-02-10 18:36 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-02-10 12:48 -------
In reply to comment #13 - I have tested the patch on i686, amd64, ppc, and
ia64.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (22 preceding siblings ...)
2005-02-10 18:36 ` steven at gcc dot gnu dot org
@ 2005-05-19 17:24 ` mmitchel at gcc dot gnu dot org
2005-08-22 12:49 ` pinskia at gcc dot gnu dot org
24 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-05-19 17:24 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.4 |3.4.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
` (23 preceding siblings ...)
2005-05-19 17:24 ` mmitchel at gcc dot gnu dot org
@ 2005-08-22 12:49 ` pinskia at gcc dot gnu dot org
24 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-08-22 12:49 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|critical |normal
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
[not found] <bug-11707-10053@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2006-02-27 14:04 ` rguenth at gcc dot gnu dot org
@ 2006-02-28 8:46 ` gdr at gcc dot gnu dot org
3 siblings, 0 replies; 30+ messages in thread
From: gdr at gcc dot gnu dot org @ 2006-02-28 8:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #23 from gdr at gcc dot gnu dot org 2006-02-28 08:43 -------
Fixed in 4.0 and higher.
Won't fix for 3.4.x
--
gdr at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|3.4.6 |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
[not found] <bug-11707-10053@http.gcc.gnu.org/bugzilla/>
2005-10-07 3:12 ` gdr at gcc dot gnu dot org
2006-02-27 13:57 ` steven at gcc dot gnu dot org
@ 2006-02-27 14:04 ` rguenth at gcc dot gnu dot org
2006-02-28 8:46 ` gdr at gcc dot gnu dot org
3 siblings, 0 replies; 30+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-02-27 14:04 UTC (permalink / raw)
To: gcc-bugs
------- Comment #22 from rguenth at gcc dot gnu dot org 2006-02-27 14:03 -------
I don't know - the original testcase was fixed by tree-ssa merge, so, apart
from a general pass ordering overhaul there's nothing to be done for this
particular bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
[not found] <bug-11707-10053@http.gcc.gnu.org/bugzilla/>
2005-10-07 3:12 ` gdr at gcc dot gnu dot org
@ 2006-02-27 13:57 ` steven at gcc dot gnu dot org
2006-02-27 14:04 ` rguenth at gcc dot gnu dot org
2006-02-28 8:46 ` gdr at gcc dot gnu dot org
3 siblings, 0 replies; 30+ messages in thread
From: steven at gcc dot gnu dot org @ 2006-02-27 13:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #21 from steven at gcc dot gnu dot org 2006-02-27 13:55 -------
With the old loop optimizer gone, moving jump bypassing after loop2 is a quite
reasonable thing to do. Richi, now you have the chance to get your patch in
after all, if it's still useful.
Other good thing about it: Maybe this makes another RTL jump threading pass
(the one after loop2) even more unuseful...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug rtl-optimization/11707] [3.4 Regression] [new unroller] constants not propagated in unrolled loop iterations with a conditional
[not found] <bug-11707-10053@http.gcc.gnu.org/bugzilla/>
@ 2005-10-07 3:12 ` gdr at gcc dot gnu dot org
2006-02-27 13:57 ` steven at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 30+ messages in thread
From: gdr at gcc dot gnu dot org @ 2005-10-07 3:12 UTC (permalink / raw)
To: gcc-bugs
--
gdr at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4.5 |3.4.6
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11707
^ permalink raw reply [flat|nested] 30+ messages in thread
end of thread, other threads:[~2006-02-28 8:43 UTC | newest]
Thread overview: 30+ messages (download: mbox.gz / follow: Atom feed)
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2003-07-29 13:34 [Bug optimization/11707] New: constants not propagated in unrolled loop iterations with a conditional rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 13:40 ` [Bug optimization/11707] " pinskia at physics dot uc dot edu
2003-07-29 13:45 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 14:07 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-07-29 14:13 ` [Bug optimization/11707] [3.4 Regression] [new unroller] " pinskia at physics dot uc dot edu
2003-09-29 13:54 ` rakdver at gcc dot gnu dot org
2003-09-29 14:14 ` rakdver at gcc dot gnu dot org
2003-09-29 14:39 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-09-29 16:48 ` rguenth at tat dot physik dot uni-tuebingen dot de
2003-12-05 3:33 ` pinskia at gcc dot gnu dot org
2003-12-05 21:47 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2004-01-04 8:54 ` pinskia at gcc dot gnu dot org
2004-03-09 23:27 ` [Bug optimization/11707] [3.4/3.5 " mmitchel at gcc dot gnu dot org
2004-03-09 23:28 ` mmitchel at gcc dot gnu dot org
2004-03-21 18:24 ` steven at gcc dot gnu dot org
2004-06-18 23:41 ` [Bug rtl-optimization/11707] " mmitchel at gcc dot gnu dot org
2004-08-10 1:38 ` pinskia at gcc dot gnu dot org
2004-08-12 7:33 ` steven at gcc dot gnu dot org
2004-08-29 19:02 ` [Bug rtl-optimization/11707] [3.4 " mmitchel at gcc dot gnu dot org
2004-10-30 19:34 ` mmitchel at gcc dot gnu dot org
2004-11-01 0:45 ` mmitchel at gcc dot gnu dot org
2005-01-12 11:06 ` rguenth at tat dot physik dot uni-tuebingen dot de
2005-02-10 18:35 ` rguenth at gcc dot gnu dot org
2005-02-10 18:36 ` steven at gcc dot gnu dot org
2005-05-19 17:24 ` mmitchel at gcc dot gnu dot org
2005-08-22 12:49 ` pinskia at gcc dot gnu dot org
[not found] <bug-11707-10053@http.gcc.gnu.org/bugzilla/>
2005-10-07 3:12 ` gdr at gcc dot gnu dot org
2006-02-27 13:57 ` steven at gcc dot gnu dot org
2006-02-27 14:04 ` rguenth at gcc dot gnu dot org
2006-02-28 8:46 ` gdr at gcc dot gnu dot org
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