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* [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu
@ 2014-07-08 4:01 su at cs dot ucdavis.edu
2014-07-08 7:35 ` [Bug tree-optimization/61742] [4.10 Regression] " jakub at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: su at cs dot ucdavis.edu @ 2014-07-08 4:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
Bug ID: 61742
Summary: wrong code at -O3 on x86_64-linux-gnu
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
The current gcc trunk miscompiles the following testcase on x86_64-linux at -O3
in both 32-bit and 64-bit modes.
This is a regression from 4.9.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.10.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 4.10.0 20140707 (experimental) [trunk revision 212329] (GCC)
$
$ gcc-trunk -O2 small.c; a.out
1
$ gcc-4.9 -O3 small.c; a.out
1
$
$ gcc-trunk -O3 small.c; a.out
0
$
---------------------------------
int printf (const char *, ...);
int a, b, c, e, f, g, h, i, j, k;
int d[1];
int
main ()
{
int l, m;
k = 0;
for (; g < 1; g++)
{
for (i = 0; i < 1; i++)
m = b ? b : 1;
if (m)
j = d[e] = 0;
else
f = 0;
l = k ? k : a;
if (d[0] < 1)
{
c++;
h = (l || e) > 0;
}
}
printf ("%d\n", c);
return 0;
}
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
@ 2014-07-08 7:35 ` jakub at gcc dot gnu.org
2014-07-08 9:07 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-07-08 7:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-07-08
CC| |jakub at gcc dot gnu.org,
| |kyukhin at gcc dot gnu.org,
| |ysrumyan at gmail dot com
Target Milestone|--- |4.10.0
Summary|wrong code at -O3 on |[4.10 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 r209972.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2014-07-08 7:35 ` [Bug tree-optimization/61742] [4.10 Regression] " jakub at gcc dot gnu.org
@ 2014-07-08 9:07 ` rguenth at gcc dot gnu.org
2014-07-08 10:37 ` ysrumyan at gmail dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-07-08 9:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2014-07-08 7:35 ` [Bug tree-optimization/61742] [4.10 Regression] " jakub at gcc dot gnu.org
2014-07-08 9:07 ` rguenth at gcc dot gnu.org
@ 2014-07-08 10:37 ` ysrumyan at gmail dot com
2014-07-08 10:45 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ysrumyan at gmail dot com @ 2014-07-08 10:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
--- Comment #2 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
This is duplicate of PR 61576 and it should pass after r212347.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (2 preceding siblings ...)
2014-07-08 10:37 ` ysrumyan at gmail dot com
@ 2014-07-08 10:45 ` jakub at gcc dot gnu.org
2014-07-08 12:18 ` ysrumyan at gmail dot com
2014-07-10 8:00 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-07-08 10:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, it is. Can you add the testcase from this PR to trunk? Then we can
close it.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (3 preceding siblings ...)
2014-07-08 10:45 ` jakub at gcc dot gnu.org
@ 2014-07-08 12:18 ` ysrumyan at gmail dot com
2014-07-10 8:00 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: ysrumyan at gmail dot com @ 2014-07-08 12:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
--- Comment #4 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Ok. I will add it.
2014-07-08 14:45 GMT+04:00 jakub at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
>
> --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Indeed, it is. Can you add the testcase from this PR to trunk? Then we can
> close it.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/61742] [4.10 Regression] wrong code at -O3 on x86_64-linux-gnu
2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (4 preceding siblings ...)
2014-07-08 12:18 ` ysrumyan at gmail dot com
@ 2014-07-10 8:00 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-07-10 8:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61742
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Thanks.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-07-10 8:00 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2014-07-08 4:01 [Bug tree-optimization/61742] New: wrong code at -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2014-07-08 7:35 ` [Bug tree-optimization/61742] [4.10 Regression] " jakub at gcc dot gnu.org
2014-07-08 9:07 ` rguenth at gcc dot gnu.org
2014-07-08 10:37 ` ysrumyan at gmail dot com
2014-07-08 10:45 ` jakub at gcc dot gnu.org
2014-07-08 12:18 ` ysrumyan at gmail dot com
2014-07-10 8:00 ` jakub at gcc dot gnu.org
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