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* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
@ 2015-05-18 7:05 ` jakub at gcc dot gnu.org
2015-05-18 7:32 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-05-18 7:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-05-18
CC| |jakub at gcc dot gnu.org
Summary|wrong code at -O3 on |[4.9/5/6 Regression] wrong
|x86_64-linux-gnu |code at -O3 on
| |x86_64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r204458. But most likely this is yet another case of the RTL bug
where stack pointer based accesses are considered as non-trapping, despite
being clearly out of bounds.
The pcom change only changed
f_I_lsm0.4_7 = f[65535];
which the compiler can see as being out of bounds access quickly (note, f is
int f[2]), but after the pcom change it uses
f_I_lsm0.4_7 = MEM[(int *)&f + 262140B];
and for some reason we don't consider that as clearly out of bounds access.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
2015-05-18 7:05 ` [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu jakub at gcc dot gnu.org
@ 2015-05-18 7:32 ` jakub at gcc dot gnu.org
2015-06-22 12:09 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-05-18 7:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.3
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
2015-05-18 7:05 ` [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu jakub at gcc dot gnu.org
2015-05-18 7:32 ` jakub at gcc dot gnu.org
@ 2015-06-22 12:09 ` rguenth at gcc dot gnu.org
2015-06-26 20:17 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-06-22 12:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2015-06-22 12:09 ` rguenth at gcc dot gnu.org
@ 2015-06-26 20:17 ` jakub at gcc dot gnu.org
2015-06-26 20:38 ` jakub at gcc dot gnu.org
2015-07-03 14:30 ` mikpelinux at gmail dot com
5 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-06-26 20:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.9.3 has been released.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2015-06-26 20:17 ` jakub at gcc dot gnu.org
@ 2015-06-26 20:38 ` jakub at gcc dot gnu.org
2015-07-03 14:30 ` mikpelinux at gmail dot com
5 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-06-26 20:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.9.3 |4.9.4
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu
[not found] <bug-66186-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2015-06-26 20:38 ` jakub at gcc dot gnu.org
@ 2015-07-03 14:30 ` mikpelinux at gmail dot com
5 siblings, 0 replies; 6+ messages in thread
From: mikpelinux at gmail dot com @ 2015-07-03 14:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66186
Mikael Pettersson <mikpelinux at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpelinux at gmail dot com
--- Comment #3 from Mikael Pettersson <mikpelinux at gmail dot com> ---
This test case got fixed on trunk by r225260 (PR61047 fix).
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-07-03 14:30 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2015-05-18 7:05 ` [Bug tree-optimization/66186] [4.9/5/6 Regression] wrong code at -O3 on x86_64-linux-gnu jakub at gcc dot gnu.org
2015-05-18 7:32 ` jakub at gcc dot gnu.org
2015-06-22 12:09 ` rguenth at gcc dot gnu.org
2015-06-26 20:17 ` jakub at gcc dot gnu.org
2015-06-26 20:38 ` jakub at gcc dot gnu.org
2015-07-03 14:30 ` mikpelinux at gmail dot com
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