public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/37352] New: thunks for virtual function should work on lto
@ 2008-09-03 16:29 espindola at google dot com
2008-11-19 17:49 ` [Bug c++/37352] " espindola at google dot com
` (10 more replies)
0 siblings, 11 replies; 12+ messages in thread
From: espindola at google dot com @ 2008-09-03 16:29 UTC (permalink / raw)
To: gcc-bugs
>From http://gcc.gnu.org/ml/gcc-patches/2008-03/msg00349.html:
Currently the thunks for a function are
emitted from the frontend, exactly when the function itself is emitted
(as RTL). The frontend does some analysis of thunks beforehand
already, but I simply deactivated emission of thunks for my experiment.
This needs to be done before IPA, either by making thunks a middle-end
concept, or implementing alternate entry points for real
Maybe it is possible to generate thunks eagerly as a first solution?
--
Summary: thunks for virtual function should work on lto
Product: gcc
Version: lto
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: espindola at google dot com
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
@ 2008-11-19 17:49 ` espindola at google dot com
2008-11-19 17:50 ` espindola at google dot com
` (9 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: espindola at google dot com @ 2008-11-19 17:49 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from espindola at google dot com 2008-11-19 17:47 -------
Created an attachment (id=16722)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16722&action=view)
testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
2008-11-19 17:49 ` [Bug c++/37352] " espindola at google dot com
@ 2008-11-19 17:50 ` espindola at google dot com
2008-11-19 17:54 ` espindola at google dot com
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: espindola at google dot com @ 2008-11-19 17:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from espindola at google dot com 2008-11-19 17:49 -------
To reproduce:
g++ -O2 -c thunk.C -flto-single -o thunk-lto.o
g++ -O2 -c thunk.C -o thunk.o
readelf -s thunk.o | grep Th
35: 0000000000000000 6 FUNC WEAK DEFAULT 19 _ZThn8_N1C1fEv
readelf -s thunk-lto.o | grep Th
26: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND _ZThn8_N1C1fEv
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
2008-11-19 17:49 ` [Bug c++/37352] " espindola at google dot com
2008-11-19 17:50 ` espindola at google dot com
@ 2008-11-19 17:54 ` espindola at google dot com
2008-12-31 19:28 ` pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: espindola at google dot com @ 2008-11-19 17:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from espindola at google dot com 2008-11-19 17:53 -------
This case can be easily fixed by setting targetm.asm_out.can_output_mi_thunk to
NULL. This will introduce a performance regression.
The only case that will be missing is varg functions.
The llvm equivalent bug is http://llvm.org/bugs/show_bug.cgi?id=2861.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (2 preceding siblings ...)
2008-11-19 17:54 ` espindola at google dot com
@ 2008-12-31 19:28 ` pinskia at gcc dot gnu dot org
2008-12-31 19:34 ` dnovillo at gcc dot gnu dot org
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-12-31 19:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2008-12-31 19:26 -------
Confirmed.
--
pinskia 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 |2008-12-31 19:26:06
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (3 preceding siblings ...)
2008-12-31 19:28 ` pinskia at gcc dot gnu dot org
@ 2008-12-31 19:34 ` dnovillo at gcc dot gnu dot org
2009-10-06 13:53 ` rguenth at gcc dot gnu dot org
` (5 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: dnovillo at gcc dot gnu dot org @ 2008-12-31 19:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from dnovillo at gcc dot gnu dot org 2008-12-31 19:32 -------
Initial fix at http://gcc.gnu.org/ml/gcc-patches/2008-12/msg00953.html
Keeping open as thunks with varargs are still broken.
--
dnovillo at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|maddox at google dot com |
AssignedTo|unassigned at gcc dot gnu |dnovillo at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2008-12-31 19:26:06 |2008-12-31 19:32:54
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (4 preceding siblings ...)
2008-12-31 19:34 ` dnovillo at gcc dot gnu dot org
@ 2009-10-06 13:53 ` rguenth at gcc dot gnu dot org
2009-10-06 13:54 ` rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-10-06 13:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2009-10-06 13:53 -------
*** Bug 41602 has been marked as a duplicate of this bug. ***
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rubidium at openttd dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (5 preceding siblings ...)
2009-10-06 13:53 ` rguenth at gcc dot gnu dot org
@ 2009-10-06 13:54 ` rguenth at gcc dot gnu dot org
2009-10-10 18:44 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-10-06 13:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from rguenth at gcc dot gnu dot org 2009-10-06 13:54 -------
Another testcase in PR41602. SPEC CPU 2006 450.soplex is the only one in
SPEC 2000/2006 to run into this issue.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (6 preceding siblings ...)
2009-10-06 13:54 ` rguenth at gcc dot gnu dot org
@ 2009-10-10 18:44 ` rguenth at gcc dot gnu dot org
2009-11-11 18:28 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-10-10 18:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from rguenth at gcc dot gnu dot org 2009-10-10 18:44 -------
*** Bug 41663 has been marked as a duplicate of this bug. ***
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |danglin at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (7 preceding siblings ...)
2009-10-10 18:44 ` rguenth at gcc dot gnu dot org
@ 2009-11-11 18:28 ` pinskia at gcc dot gnu dot org
2009-11-11 20:32 ` rguenth at gcc dot gnu dot org
2009-11-30 12:37 ` rguenth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-11-11 18:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from pinskia at gcc dot gnu dot org 2009-11-11 18:28 -------
*** Bug 42009 has been marked as a duplicate of this bug. ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (8 preceding siblings ...)
2009-11-11 18:28 ` pinskia at gcc dot gnu dot org
@ 2009-11-11 20:32 ` rguenth at gcc dot gnu dot org
2009-11-30 12:37 ` rguenth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-11-11 20:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from rguenth at gcc dot gnu dot org 2009-11-11 20:32 -------
There's a simple workaround for most cases, condition asm-thunks on
!flag_write_lto. We'll do this if a proper implementation doesn't come up
for 4.5.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/37352] thunks for virtual function should work on lto
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
` (9 preceding siblings ...)
2009-11-11 20:32 ` rguenth at gcc dot gnu dot org
@ 2009-11-30 12:37 ` rguenth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-11-30 12:37 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from rguenth at gcc dot gnu dot org 2009-11-30 12:36 -------
Fixed by Honza.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37352
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2009-11-30 12:37 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-09-03 16:29 [Bug c++/37352] New: thunks for virtual function should work on lto espindola at google dot com
2008-11-19 17:49 ` [Bug c++/37352] " espindola at google dot com
2008-11-19 17:50 ` espindola at google dot com
2008-11-19 17:54 ` espindola at google dot com
2008-12-31 19:28 ` pinskia at gcc dot gnu dot org
2008-12-31 19:34 ` dnovillo at gcc dot gnu dot org
2009-10-06 13:53 ` rguenth at gcc dot gnu dot org
2009-10-06 13:54 ` rguenth at gcc dot gnu dot org
2009-10-10 18:44 ` rguenth at gcc dot gnu dot org
2009-11-11 18:28 ` pinskia at gcc dot gnu dot org
2009-11-11 20:32 ` rguenth at gcc dot gnu dot org
2009-11-30 12:37 ` rguenth at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).