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* [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts
@ 2006-05-04 22:50 dann at godzilla dot ics dot uci dot edu
2006-05-04 23:04 ` [Bug target/27440] " pinskia at gcc dot gnu dot org
` (20 more replies)
0 siblings, 21 replies; 22+ messages in thread
From: dann at godzilla dot ics dot uci dot edu @ 2006-05-04 22:50 UTC (permalink / raw)
To: gcc-bugs
Compiling this code with 3.4.6
void fill2 (unsigned int *arr, unsigned int val, unsigned int start, unsigned
int limit)
{
unsigned int i;
for (i = start; i < start + limit; i++)
arr[i] = val;
}
generates:
.L10:
movl %ecx, (%ebx,%eax,4)
incl %eax
.L8:
cmpl %eax, %edx
ja .L10
4.0/4.1/4.2 -O2 generate:
.L4:
incl %edx
movl %esi, (%eax)
addl $4, %eax
cmpl %ecx, %edx
jne .L4
which is both slower and bigger.
using -O2 -fno-ivopts the result is much better:
.L4:
movl %ecx, (%ebx,%eax,4)
incl %eax
cmpl %edx, %eax
jb .L4
The difference in the .final_cleanup dump with and without ivopts is obvious:
With ivopts:
void * ivtmp.29;
unsigned int ivtmp.26;
unsigned int D.1290;
<bb 0>:
D.1290 = start + limit;
if (start < D.1290) goto <L6>; else goto <L2>;
<L6>:;
ivtmp.29 = arr + (unsigned int *) (start * 4);
ivtmp.26 = 0;
<L0>:;
MEM[base: (unsigned int *) ivtmp.29] = val;
ivtmp.26 = ivtmp.26 + 1;
ivtmp.29 = ivtmp.29 + 4B;
if (ivtmp.26 != D.1290 - start) goto <L0>; else goto <L2>;
<L2>:;
return;
Without ivopts:
unsigned int i;
unsigned int D.1290;
<bb 0>:
D.1290 = start + limit;
if (start < D.1290) goto <L11>; else goto <L2>;
<L11>:;
i = start;
<L0>:;
*((unsigned int *) (i * 4) + arr) = val;
i = i + 1;
if (i < D.1290) goto <L0>; else goto <L2>;
<L2>:;
return;
The "void * ivtmp.29" is created by the ivopts pass. Why is it
a void* when it is known to be assigned to a unsigned int* ?
Note that loops like the one in this example are quite common. For example in
the assembly for PR8361 there are about 37 "fill" functions with very similar
code (they are intantiations of 2 different templates, but still...)
--
Summary: [4.0/4.1/4.2 regression] code quality regression due to
ivopts
Product: gcc
Version: 4.0.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dann at godzilla dot ics dot uci dot edu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
@ 2006-05-04 23:04 ` pinskia at gcc dot gnu dot org
2006-05-04 23:09 ` dann at godzilla dot ics dot uci dot edu
` (19 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-05-04 23:04 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2006-05-04 23:04 -------
IV-OPTs just gets info from the target. Now if the target says weird
addressing mode is the same as cheap ones, what do you think will happen?
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
Component|tree-optimization |target
Keywords| |missed-optimization
Target Milestone|--- |4.0.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
2006-05-04 23:04 ` [Bug target/27440] " pinskia at gcc dot gnu dot org
@ 2006-05-04 23:09 ` dann at godzilla dot ics dot uci dot edu
2006-05-05 13:10 ` rguenth at gcc dot gnu dot org
` (18 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: dann at godzilla dot ics dot uci dot edu @ 2006-05-04 23:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from dann at godzilla dot ics dot uci dot edu 2006-05-04 23:09 -------
(In reply to comment #1)
> IV-OPTs just gets info from the target. Now if the target says weird
> addressing mode is the same as cheap ones, what do you think will happen?
Does IV-OPTs also take into consideration the cost of having 2 IVs instead of
1?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
2006-05-04 23:04 ` [Bug target/27440] " pinskia at gcc dot gnu dot org
2006-05-04 23:09 ` dann at godzilla dot ics dot uci dot edu
@ 2006-05-05 13:10 ` rguenth at gcc dot gnu dot org
2006-06-04 18:50 ` mmitchel at gcc dot gnu dot org
` (17 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-05-05 13:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2006-05-05 13:10 -------
Yes it does. Not that the outcome is optimal here...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (2 preceding siblings ...)
2006-05-05 13:10 ` rguenth at gcc dot gnu dot org
@ 2006-06-04 18:50 ` mmitchel at gcc dot gnu dot org
2006-09-13 3:32 ` bangerth at dealii dot org
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From: mmitchel at gcc dot gnu dot org @ 2006-06-04 18:50 UTC (permalink / raw)
To: gcc-bugs
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (3 preceding siblings ...)
2006-06-04 18:50 ` mmitchel at gcc dot gnu dot org
@ 2006-09-13 3:32 ` bangerth at dealii dot org
2006-09-13 4:26 ` pinskia at gcc dot gnu dot org
` (15 subsequent siblings)
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From: bangerth at dealii dot org @ 2006-09-13 3:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from bangerth at dealii dot org 2006-09-13 03:32 -------
With today's 4.1.x snapshot and on x86_64, I get this at -O2:
----------------
.L4:
mov %edx, %eax
incl %edx
cmpl %edx, %ecx
movl %esi, (%rdi,%rax,4)
jne .L4
----------------
and this at -O2 -fno-ivopts
----------------
.L4:
mov %edx, %eax
incl %edx
cmpl %ecx, %edx
movl %esi, (%rdi,%rax,4)
jb .L4
----------------
That means we get the same bad code there in both cases :-(
W.
--
bangerth at dealii dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bangerth at dealii dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (4 preceding siblings ...)
2006-09-13 3:32 ` bangerth at dealii dot org
@ 2006-09-13 4:26 ` pinskia at gcc dot gnu dot org
2006-10-10 14:06 ` rguenth at gcc dot gnu dot org
` (14 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2006-09-13 4:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from pinskia at gcc dot gnu dot org 2006-09-13 04:25 -------
(In reply to comment #4)
> That means we get the same bad code there in both cases :-(
Actually that is better code than was produced before. Only the extra move is
there now. Except I don't get your results for either the mainline or 4.1.2.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (5 preceding siblings ...)
2006-09-13 4:26 ` pinskia at gcc dot gnu dot org
@ 2006-10-10 14:06 ` rguenth at gcc dot gnu dot org
2006-10-10 14:36 ` rakdver at gcc dot gnu dot org
` (13 subsequent siblings)
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From: rguenth at gcc dot gnu dot org @ 2006-10-10 14:06 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2006-10-10 14:06 -------
Confirmed (as in comment #1). With -Os instead of -O2 we even produce
.L3:
movl %ebx, -4(%edx)
incl %eax
.L2:
addl $4, %edx
cmpl %ecx, %eax
jb .L3
(because loop header copying is disabled there).
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rakdver at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Known to work| |3.4.6
Last reconfirmed|0000-00-00 00:00:00 |2006-10-10 14:06:28
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (6 preceding siblings ...)
2006-10-10 14:06 ` rguenth at gcc dot gnu dot org
@ 2006-10-10 14:36 ` rakdver at gcc dot gnu dot org
2006-10-10 14:48 ` uros at kss-loka dot si
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From: rakdver at gcc dot gnu dot org @ 2006-10-10 14:36 UTC (permalink / raw)
To: gcc-bugs
--
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
Last reconfirmed|2006-10-10 14:06:28 |2006-10-10 14:36:32
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (7 preceding siblings ...)
2006-10-10 14:36 ` rakdver at gcc dot gnu dot org
@ 2006-10-10 14:48 ` uros at kss-loka dot si
2007-02-03 16:55 ` [Bug target/27440] [4.0/4.1/4.2/4.3 " gdr at gcc dot gnu dot org
` (11 subsequent siblings)
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From: uros at kss-loka dot si @ 2006-10-10 14:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from uros at kss-loka dot si 2006-10-10 14:48 -------
(In reply to comment #6)
> Confirmed (as in comment #1). With -Os instead of -O2 we even produce
>
> .L3:
> movl %ebx, -4(%edx)
The -4(...) part comes from PR 24669.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (8 preceding siblings ...)
2006-10-10 14:48 ` uros at kss-loka dot si
@ 2007-02-03 16:55 ` gdr at gcc dot gnu dot org
2007-02-03 20:30 ` pinskia at gcc dot gnu dot org
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From: gdr at gcc dot gnu dot org @ 2007-02-03 16:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from gdr at gcc dot gnu dot org 2007-02-03 16:55 -------
Won't fix in GCC-4.0.x. Adjusting milestone.
--
gdr at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.4 |4.1.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (9 preceding siblings ...)
2007-02-03 16:55 ` [Bug target/27440] [4.0/4.1/4.2/4.3 " gdr at gcc dot gnu dot org
@ 2007-02-03 20:30 ` pinskia at gcc dot gnu dot org
2007-02-14 9:25 ` mmitchel at gcc dot gnu dot org
` (9 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2007-02-03 20:30 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.1.3 |4.1.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (10 preceding siblings ...)
2007-02-03 20:30 ` pinskia at gcc dot gnu dot org
@ 2007-02-14 9:25 ` mmitchel at gcc dot gnu dot org
2007-11-19 10:07 ` steven at gcc dot gnu dot org
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From: mmitchel at gcc dot gnu dot org @ 2007-02-14 9:25 UTC (permalink / raw)
To: gcc-bugs
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.1.2 |4.1.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (11 preceding siblings ...)
2007-02-14 9:25 ` mmitchel at gcc dot gnu dot org
@ 2007-11-19 10:07 ` steven at gcc dot gnu dot org
2007-11-20 7:36 ` ubizjak at gmail dot com
` (7 subsequent siblings)
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From: steven at gcc dot gnu dot org @ 2007-11-19 10:07 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from steven at gcc dot gnu dot org 2007-11-19 10:07 -------
What does GCC 4.3 do with the test case of this bug?
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (12 preceding siblings ...)
2007-11-19 10:07 ` steven at gcc dot gnu dot org
@ 2007-11-20 7:36 ` ubizjak at gmail dot com
2007-11-20 7:37 ` ubizjak at gmail dot com
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From: ubizjak at gmail dot com @ 2007-11-20 7:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from ubizjak at gmail dot com 2007-11-20 07:36 -------
(In reply to comment #9)
> What does GCC 4.3 do with the test case of this bug?
gcc -Os:
.L3:
movl %ebx, -4(%edx)
incl %eax
.L2:
addl $4, %edx
cmpl %ecx, %eax
jb .L3
And the -4(...) is due to PR 26726, look at comment #18.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2007-07-04 22:16:36 |2007-11-20 07:36:22
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
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* [Bug target/27440] [4.0/4.1/4.2/4.3 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (13 preceding siblings ...)
2007-11-20 7:36 ` ubizjak at gmail dot com
@ 2007-11-20 7:37 ` ubizjak at gmail dot com
2008-07-04 21:22 ` [Bug target/27440] [4.2/4.3/4.4 " jsm28 at gcc dot gnu dot org
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From: ubizjak at gmail dot com @ 2007-11-20 7:37 UTC (permalink / raw)
To: gcc-bugs
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Last reconfirmed|2007-11-20 07:36:22 |2007-11-20 07:36:56
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.2/4.3/4.4 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (14 preceding siblings ...)
2007-11-20 7:37 ` ubizjak at gmail dot com
@ 2008-07-04 21:22 ` jsm28 at gcc dot gnu dot org
2009-02-03 16:25 ` bonzini at gnu dot org
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From: jsm28 at gcc dot gnu dot org @ 2008-07-04 21:22 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from jsm28 at gcc dot gnu dot org 2008-07-04 21:21 -------
Closing 4.1 branch.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.1/4.2/4.3/4.4 regression]|[4.2/4.3/4.4 regression]
|code quality regression due |code quality regression due
|to ivopts |to ivopts
Target Milestone|4.1.3 |4.2.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.2/4.3/4.4 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (15 preceding siblings ...)
2008-07-04 21:22 ` [Bug target/27440] [4.2/4.3/4.4 " jsm28 at gcc dot gnu dot org
@ 2009-02-03 16:25 ` bonzini at gnu dot org
2009-03-31 19:36 ` [Bug target/27440] [4.3/4.4/4.5 " jsm28 at gcc dot gnu dot org
` (3 subsequent siblings)
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From: bonzini at gnu dot org @ 2009-02-03 16:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #12 from bonzini at gnu dot org 2009-02-03 16:25 -------
When generating 64-bit code we produce good induction variables either with or
without ivopts, but with an extra mov.
For 32-bit code the situation is the same as reported originally.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bonzini at gnu dot org
Last reconfirmed|2007-11-20 07:36:56 |2009-02-03 16:25:29
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.3/4.4/4.5 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (16 preceding siblings ...)
2009-02-03 16:25 ` bonzini at gnu dot org
@ 2009-03-31 19:36 ` jsm28 at gcc dot gnu dot org
2009-08-04 12:34 ` rguenth at gcc dot gnu dot org
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From: jsm28 at gcc dot gnu dot org @ 2009-03-31 19:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #13 from jsm28 at gcc dot gnu dot org 2009-03-31 19:36 -------
Closing 4.2 branch.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.2/4.3/4.4/4.5 regression]|[4.3/4.4/4.5 regression]
|code quality regression due |code quality regression due
|to ivopts |to ivopts
Target Milestone|4.2.5 |4.3.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.3/4.4/4.5 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (17 preceding siblings ...)
2009-03-31 19:36 ` [Bug target/27440] [4.3/4.4/4.5 " jsm28 at gcc dot gnu dot org
@ 2009-08-04 12:34 ` rguenth at gcc dot gnu dot org
2009-12-30 16:40 ` [Bug target/27440] [4.3/4.4 " steven at gcc dot gnu dot org
2010-05-22 18:17 ` rguenth at gcc dot gnu dot org
20 siblings, 0 replies; 22+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-08-04 12:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #14 from rguenth at gcc dot gnu dot org 2009-08-04 12:27 -------
GCC 4.3.4 is being released, adjusting target milestone.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.3.4 |4.3.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.3/4.4 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (18 preceding siblings ...)
2009-08-04 12:34 ` rguenth at gcc dot gnu dot org
@ 2009-12-30 16:40 ` steven at gcc dot gnu dot org
2010-05-22 18:17 ` rguenth at gcc dot gnu dot org
20 siblings, 0 replies; 22+ messages in thread
From: steven at gcc dot gnu dot org @ 2009-12-30 16:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #15 from steven at gcc dot gnu dot org 2009-12-30 16:39 -------
With "GCC: (GNU) 4.5.0 20091228 (experimental) [trunk revision 155486]" I get
identical code at -O2 with and without -fno-ivopts for i686:
.L3:
movl %ebx, (%ecx,%eax,4)
addl $1, %eax
cmpl %edx, %eax
jb .L3
For x86_64 at -O2, there is still the extra mov. The extra mov is not there
with -Os (with and without -fno-ivopts).
Since the mov on x86_64 is essentially free, I consider this fixed for GCC
4.5.0.
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|3.4.6 |3.4.6 4.5.0
Summary|[4.3/4.4/4.5 regression] |[4.3/4.4 regression] code
|code quality regression due |quality regression due to
|to ivopts |ivopts
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
* [Bug target/27440] [4.3/4.4 regression] code quality regression due to ivopts
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
` (19 preceding siblings ...)
2009-12-30 16:40 ` [Bug target/27440] [4.3/4.4 " steven at gcc dot gnu dot org
@ 2010-05-22 18:17 ` rguenth at gcc dot gnu dot org
20 siblings, 0 replies; 22+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-05-22 18:17 UTC (permalink / raw)
To: gcc-bugs
------- Comment #16 from rguenth at gcc dot gnu dot org 2010-05-22 18:11 -------
GCC 4.3.5 is being released, adjusting target milestone.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.3.5 |4.3.6
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
^ permalink raw reply [flat|nested] 22+ messages in thread
end of thread, other threads:[~2010-05-22 18:17 UTC | newest]
Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-05-04 22:50 [Bug tree-optimization/27440] New: [4.0/4.1/4.2 regression] code quality regression due to ivopts dann at godzilla dot ics dot uci dot edu
2006-05-04 23:04 ` [Bug target/27440] " pinskia at gcc dot gnu dot org
2006-05-04 23:09 ` dann at godzilla dot ics dot uci dot edu
2006-05-05 13:10 ` rguenth at gcc dot gnu dot org
2006-06-04 18:50 ` mmitchel at gcc dot gnu dot org
2006-09-13 3:32 ` bangerth at dealii dot org
2006-09-13 4:26 ` pinskia at gcc dot gnu dot org
2006-10-10 14:06 ` rguenth at gcc dot gnu dot org
2006-10-10 14:36 ` rakdver at gcc dot gnu dot org
2006-10-10 14:48 ` uros at kss-loka dot si
2007-02-03 16:55 ` [Bug target/27440] [4.0/4.1/4.2/4.3 " gdr at gcc dot gnu dot org
2007-02-03 20:30 ` pinskia at gcc dot gnu dot org
2007-02-14 9:25 ` mmitchel at gcc dot gnu dot org
2007-11-19 10:07 ` steven at gcc dot gnu dot org
2007-11-20 7:36 ` ubizjak at gmail dot com
2007-11-20 7:37 ` ubizjak at gmail dot com
2008-07-04 21:22 ` [Bug target/27440] [4.2/4.3/4.4 " jsm28 at gcc dot gnu dot org
2009-02-03 16:25 ` bonzini at gnu dot org
2009-03-31 19:36 ` [Bug target/27440] [4.3/4.4/4.5 " jsm28 at gcc dot gnu dot org
2009-08-04 12:34 ` rguenth at gcc dot gnu dot org
2009-12-30 16:40 ` [Bug target/27440] [4.3/4.4 " steven at gcc dot gnu dot org
2010-05-22 18:17 ` rguenth at gcc dot gnu dot org
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