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* [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes
@ 2008-02-29 23:24 steven at gcc dot gnu dot org
2008-02-29 23:34 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: steven at gcc dot gnu dot org @ 2008-02-29 23:24 UTC (permalink / raw)
To: gcc-bugs
See http://gcc.gnu.org/ml/gcc-patches/2007-10/msg01011.html
``When -ftrapv is in effect, libcalls are "necessary" so that the results of an
operation can be propagated without making the call to the libgcc functions
dead. The attached patch causes a failure in pr30286.c.''
This has to be investigated before libcall notes can be removed from the
compiler.
--
Summary: Correctness with -ftrapv depends on libcall notes
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: steven at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depends on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
@ 2008-02-29 23:34 ` rguenth at gcc dot gnu dot org
2008-02-29 23:37 ` steven at gcc dot gnu dot org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-02-29 23:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2008-02-29 23:33 -------
-ftrapv is seriously broken and nobody wants to fix it; so the most appealing
solution is to remove support for -ftrapv. See PR19020, especially the
libcall part is broken as well.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-02-29 23:33:53
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depends on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
2008-02-29 23:34 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
@ 2008-02-29 23:37 ` steven at gcc dot gnu dot org
2008-05-31 9:19 ` [Bug middle-end/35412] [4.4 Regression] Correctness with -ftrapv depended " bonzini at gnu dot org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: steven at gcc dot gnu dot org @ 2008-02-29 23:37 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from steven at gcc dot gnu dot org 2008-02-29 23:36 -------
PR19020 shows that -ftrapv vs. libcalls is broken even without Paolo's patch.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] [4.4 Regression] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
2008-02-29 23:34 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
2008-02-29 23:37 ` steven at gcc dot gnu dot org
@ 2008-05-31 9:19 ` bonzini at gnu dot org
2008-06-11 11:10 ` jsm28 at gcc dot gnu dot org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bonzini at gnu dot org @ 2008-05-31 9:19 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from bonzini at gnu dot org 2008-05-31 09:18 -------
Well, regression is a big word because -ftrapv is broken in general. I guess
the RM will lower the priority.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |SUSPENDED
Known to fail| |4.4.0
Known to work| |4.3.1
Summary|Correctness with -ftrapv |[4.4 Regression] Correctness
|depends on libcall notes |with -ftrapv depended on
| |libcall notes
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] [4.4 Regression] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (2 preceding siblings ...)
2008-05-31 9:19 ` [Bug middle-end/35412] [4.4 Regression] Correctness with -ftrapv depended " bonzini at gnu dot org
@ 2008-06-11 11:10 ` jsm28 at gcc dot gnu dot org
2008-06-25 11:55 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2008-06-11 11:10 UTC (permalink / raw)
To: gcc-bugs
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (3 preceding siblings ...)
2008-06-11 11:10 ` jsm28 at gcc dot gnu dot org
@ 2008-06-25 11:55 ` rguenth at gcc dot gnu dot org
2008-07-04 19:43 ` jsm28 at gcc dot gnu dot org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-06-25 11:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2008-06-25 11:54 -------
Not a regression. $Summary was true always.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.4 Regression] Correctness|Correctness with -ftrapv
|with -ftrapv depended on |depended on libcall notes
|libcall notes |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (4 preceding siblings ...)
2008-06-25 11:55 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
@ 2008-07-04 19:43 ` jsm28 at gcc dot gnu dot org
2009-04-14 20:00 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2008-07-04 19:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from jsm28 at gcc dot gnu dot org 2008-07-04 19:42 -------
Not a regression, removing milestone.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.4.0 |---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (5 preceding siblings ...)
2008-07-04 19:43 ` jsm28 at gcc dot gnu dot org
@ 2009-04-14 20:00 ` pinskia at gcc dot gnu dot org
2009-04-14 20:08 ` jv244 at cam dot ac dot uk
2009-05-14 10:55 ` rguenth at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-04-14 20:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from pinskia at gcc dot gnu dot org 2009-04-14 19:59 -------
*** Bug 39771 has been marked as a duplicate of this bug. ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jv244 at cam dot ac dot uk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (6 preceding siblings ...)
2009-04-14 20:00 ` pinskia at gcc dot gnu dot org
@ 2009-04-14 20:08 ` jv244 at cam dot ac dot uk
2009-05-14 10:55 ` rguenth at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: jv244 at cam dot ac dot uk @ 2009-04-14 20:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jv244 at cam dot ac dot uk 2009-04-14 20:08 -------
I'm reopening this report. -ftrapv is still documented, so can be expected to
work by users.
For the particular problem I have right now, a functional version of this
option would be a great thing to have.
--
jv244 at cam dot ac dot uk changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |NEW
Last reconfirmed|2008-02-29 23:33:53 |2009-04-14 20:08:33
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/35412] Correctness with -ftrapv depended on libcall notes
2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
` (7 preceding siblings ...)
2009-04-14 20:08 ` jv244 at cam dot ac dot uk
@ 2009-05-14 10:55 ` rguenth at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-05-14 10:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from rguenth at gcc dot gnu dot org 2009-05-14 10:55 -------
*** Bug 40143 has been marked as a duplicate of this bug. ***
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dickinsm at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2009-05-14 10:55 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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2008-02-29 23:24 [Bug middle-end/35412] New: Correctness with -ftrapv depends on libcall notes steven at gcc dot gnu dot org
2008-02-29 23:34 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
2008-02-29 23:37 ` steven at gcc dot gnu dot org
2008-05-31 9:19 ` [Bug middle-end/35412] [4.4 Regression] Correctness with -ftrapv depended " bonzini at gnu dot org
2008-06-11 11:10 ` jsm28 at gcc dot gnu dot org
2008-06-25 11:55 ` [Bug middle-end/35412] " rguenth at gcc dot gnu dot org
2008-07-04 19:43 ` jsm28 at gcc dot gnu dot org
2009-04-14 20:00 ` pinskia at gcc dot gnu dot org
2009-04-14 20:08 ` jv244 at cam dot ac dot uk
2009-05-14 10:55 ` rguenth at gcc dot gnu dot org
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