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* [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
@ 2015-08-20 19:25 hjl.tools at gmail dot com
2015-08-20 21:34 ` [Bug middle-end/67298] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: hjl.tools at gmail dot com @ 2015-08-20 19:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
Bug ID: 67298
Summary: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: naveenh at gcc dot gnu.org
Target Milestone: ---
On Linux/x86-64, r226847 compiles 254.gap in SPEC CPU 2000
into an infinite loop with
-O2 -ffast-math -DSPEC_CPU2000_LP64
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/67298] [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
@ 2015-08-20 21:34 ` pinskia at gcc dot gnu.org
2015-08-21 9:01 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-08-20 21:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu.org
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This could be a bug in gap. Have you tried using -fsantitized=undefined on the
sources?
How about a reduced testcase?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/67298] [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
2015-08-20 21:34 ` [Bug middle-end/67298] " pinskia at gcc dot gnu.org
@ 2015-08-21 9:01 ` rguenth at gcc dot gnu.org
2015-08-24 14:25 ` afomin.mailbox at gmail dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-08-21 9:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.0
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/67298] [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
2015-08-20 21:34 ` [Bug middle-end/67298] " pinskia at gcc dot gnu.org
2015-08-21 9:01 ` rguenth at gcc dot gnu.org
@ 2015-08-24 14:25 ` afomin.mailbox at gmail dot com
2015-08-24 21:09 ` afomin.mailbox at gmail dot com
2015-08-25 8:49 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: afomin.mailbox at gmail dot com @ 2015-08-24 14:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
Alexander Fomin <afomin.mailbox at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |afomin.mailbox at gmail dot com
--- Comment #2 from Alexander Fomin <afomin.mailbox at gmail dot com> ---
I can see many signed integer overflows on 254.gap compiled with
-fsanitize=signed-integer-overflow, mostly caused by multiplication.
I'll try to provide a reduced testcase.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/67298] [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
` (2 preceding siblings ...)
2015-08-24 14:25 ` afomin.mailbox at gmail dot com
@ 2015-08-24 21:09 ` afomin.mailbox at gmail dot com
2015-08-25 8:49 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: afomin.mailbox at gmail dot com @ 2015-08-24 21:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
--- Comment #4 from Alexander Fomin <afomin.mailbox at gmail dot com> ---
Yep, looks like -fwrapv fixes this issue.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/67298] [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
` (3 preceding siblings ...)
2015-08-24 21:09 ` afomin.mailbox at gmail dot com
@ 2015-08-25 8:49 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-08-25 8:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2015-08-25
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Probably INVALID then...
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-08-25 8:49 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2015-08-20 19:25 [Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled hjl.tools at gmail dot com
2015-08-20 21:34 ` [Bug middle-end/67298] " pinskia at gcc dot gnu.org
2015-08-21 9:01 ` rguenth at gcc dot gnu.org
2015-08-24 14:25 ` afomin.mailbox at gmail dot com
2015-08-24 21:09 ` afomin.mailbox at gmail dot com
2015-08-25 8:49 ` mpolacek at gcc dot gnu.org
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