* [Bug c/61068] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
@ 2014-05-05 16:40 ` wence at gmx dot li
2014-05-05 16:46 ` [Bug target/61068] " mpolacek at gcc dot gnu.org
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: wence at gmx dot li @ 2014-05-05 16:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
--- Comment #1 from Lawrence Mitchell <wence at gmx dot li> ---
4.9 does not fail.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug target/61068] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
2014-05-05 16:40 ` [Bug c/61068] " wence at gmx dot li
@ 2014-05-05 16:46 ` mpolacek at gcc dot gnu.org
2014-05-05 20:28 ` zsojka at seznam dot cz
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2014-05-05 16:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
Component|c |target
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can't reproduce on Linux.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug target/61068] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
2014-05-05 16:40 ` [Bug c/61068] " wence at gmx dot li
2014-05-05 16:46 ` [Bug target/61068] " mpolacek at gcc dot gnu.org
@ 2014-05-05 20:28 ` zsojka at seznam dot cz
2014-05-06 6:13 ` wence at gmx dot li
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: zsojka at seznam dot cz @ 2014-05-05 20:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Zdenek Sojka <zsojka at seznam dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zsojka at seznam dot cz
--- Comment #3 from Zdenek Sojka <zsojka at seznam dot cz> ---
You are casting "double arg1_0[12][3]" (and others) to "(double *)arg1_0" and
then using it as a single-dimensional array. The code has undefined behaviour.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug target/61068] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (2 preceding siblings ...)
2014-05-05 20:28 ` zsojka at seznam dot cz
@ 2014-05-06 6:13 ` wence at gmx dot li
2014-05-06 8:53 ` [Bug tree-optimization/61068] [4.8 Regression] " rguenth at gcc dot gnu.org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: wence at gmx dot li @ 2014-05-06 6:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
--- Comment #5 from Lawrence Mitchell <wence at gmx dot li> ---
(In reply to Zdenek Sojka from comment #3)
> You are casting "double arg1_0[12][3]" (and others) to "(double *)arg1_0"
> and then using it as a single-dimensional array. The code has undefined
> behaviour.
Apologies, I I've updated the test case to use 1D arrays everywhere and the
problem persists. I believe this latter does not invoke undefined behaviour.
Thanks,
Lawrence
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (3 preceding siblings ...)
2014-05-06 6:13 ` wence at gmx dot li
@ 2014-05-06 8:53 ` rguenth at gcc dot gnu.org
2014-05-06 8:53 ` rguenth at gcc dot gnu.org
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-05-06 8:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
So - would be interesting to know what fixed it on trunk.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (4 preceding siblings ...)
2014-05-06 8:53 ` [Bug tree-optimization/61068] [4.8 Regression] " rguenth at gcc dot gnu.org
@ 2014-05-06 8:53 ` rguenth at gcc dot gnu.org
2014-05-06 9:22 ` jakub at gcc dot gnu.org
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-05-06 8:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|UNCONFIRMED |NEW
Known to work| |4.7.3, 4.9.0
Last reconfirmed| |2014-05-06
Component|target |tree-optimization
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|-O3 generates bad code |[4.8 Regression] -O3
|(when tree-vectorize or |generates bad code (when
|inline-functions is on) |tree-vectorize or
| |inline-functions is on)
Target Milestone|--- |4.8.3
Known to fail| |4.8.2
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on x86_64-linux with -O3 -fPIC (default on darwin) and with
-O2 -ftree-vectorize -funroll-loops -fPIC.
There are a few vectorizer wrong-code bugs on the 4.8 branch that I haven't
managed to backport yet from 4.9. 4.7 seems to work.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (5 preceding siblings ...)
2014-05-06 8:53 ` rguenth at gcc dot gnu.org
@ 2014-05-06 9:22 ` jakub at gcc dot gnu.org
2014-05-06 9:25 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-05-06 9:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems it has been introduced by r195609 and fixed by r196782.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (6 preceding siblings ...)
2014-05-06 9:22 ` jakub at gcc dot gnu.org
@ 2014-05-06 9:25 ` rguenth at gcc dot gnu.org
2014-05-06 10:13 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-05-06 9:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, I have a look.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (7 preceding siblings ...)
2014-05-06 9:25 ` rguenth at gcc dot gnu.org
@ 2014-05-06 10:13 ` rguenth at gcc dot gnu.org
2014-05-22 9:03 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-05-06 10:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-ivopts fixes it. Reverting r195609 on top of the branch doesn't fix it,
backporting r196782 does.
IVOPTs ends up choosing different IVs, but I don't see anything obviously
wrong ...
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (8 preceding siblings ...)
2014-05-06 10:13 ` rguenth at gcc dot gnu.org
@ 2014-05-22 9:03 ` rguenth at gcc dot gnu.org
2014-12-10 12:59 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-05-22 9:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.8.3 |4.8.4
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 4.8.3 is being released, adjusting target milestone.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (9 preceding siblings ...)
2014-05-22 9:03 ` rguenth at gcc dot gnu.org
@ 2014-12-10 12:59 ` rguenth at gcc dot gnu.org
2014-12-19 13:31 ` jakub at gcc dot gnu.org
2015-06-23 8:52 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-12-10 12:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P2
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (10 preceding siblings ...)
2014-12-10 12:59 ` rguenth at gcc dot gnu.org
@ 2014-12-19 13:31 ` jakub at gcc dot gnu.org
2015-06-23 8:52 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-12-19 13:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.8.4 |4.8.5
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.4 has been released.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug tree-optimization/61068] [4.8 Regression] -O3 generates bad code (when tree-vectorize or inline-functions is on)
2014-05-05 16:07 [Bug c/61068] New: -O3 generates bad code (when tree-vectorize or inline-functions is on) wence at gmx dot li
` (11 preceding siblings ...)
2014-12-19 13:31 ` jakub at gcc dot gnu.org
@ 2015-06-23 8:52 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-06-23 8:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|4.8.5 |4.9.0
Known to fail| |4.8.5
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for 4.9.0.
^ permalink raw reply [flat|nested] 14+ messages in thread