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* [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
@ 2013-11-28 1:21 su at cs dot ucdavis.edu
2013-11-28 11:24 ` [Bug tree-optimization/59322] [4.9 Regression] " mpolacek at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: su at cs dot ucdavis.edu @ 2013-11-28 1:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Bug ID: 59322
Summary: ICE with segfault on valid code at -O1, -O2, and -O3
on x86_64-linux-gnu
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
The following code causes an ICE when compiled with the current gcc trunk at
-O1, -O2 and -O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 4.8.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/4.9.0/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 4.9.0 20131127 (experimental) [trunk revision 205463] (GCC)
$
$ gcc-trunk -O0 -c small.c
$ gcc-trunk -Os -c small.c
$ gcc-4.8.2 -O1 -c small.c
$
$ gcc-trunk -O1 -c small.c
small.c: In function ‘foo’:
small.c:5:1: internal compiler error: Segmentation fault
foo ()
^
0x9ab60f crash_signal
../../gcc-trunk/gcc/toplev.c:336
0xb4c595 thread_through_all_blocks(bool)
../../gcc-trunk/gcc/tree-ssa-threadupdate.c:1651
0xa93a4a tree_ssa_dominator_optimize
../../gcc-trunk/gcc/tree-ssa-dom.c:886
0xa93a4a execute
../../gcc-trunk/gcc/tree-ssa-dom.c:984
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------
int a, b, d;
short c;
int
foo ()
{
for (b = 0; b; b = a)
for (c = 18; c < 10; c++)
{
d = c;
if (d)
return 0;
}
return 0;
}
>From gcc-bugs-return-436083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 01:41:57 2013
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/59304] #pragma diagnostic pop after warning fails for options unspecified in the command-line and disabled by default
Date: Thu, 28 Nov 2013 01:41:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59304
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|#pragma diagnostic pop |#pragma diagnostic pop
|fails with -Wswitch-enum |after warning fails for
| |options unspecified in the
| |command-line and disabled
| |by default
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
We could undo back to the command-line just reseting variables mentioned in the
classification history up to the POP. But this might be fragile (the pragma
diagnostics warning uses handle_generated_option, which does a lot of extra
work) and also it does not work with variables that enable other variables
like: "-Wall".
>From gcc-bugs-return-436084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 28 01:54:06 2013
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/57748] [4.7/4.8/4.9 Regression] ICE when expanding assignment to unaligned zero-sized array
Date: Thu, 28 Nov 2013 01:54:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW748
--- Comment #50 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Paulo J. Matos from comment #49)
> I noticed that enabling misaligned moves have created a few test failures on
> my port. Namely: execute.exp 051113-1.c. It was generating one too many
> moves to deference the structure in function Sum.
Just for curiosity:
On which target did you reproduce this problem in 20051113-1.c ?
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
@ 2013-11-28 11:24 ` mpolacek at gcc dot gnu.org
2013-11-28 11:26 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2013-11-28 11:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-11-28
CC| |law at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Known to work| |4.8.2
Target Milestone|--- |4.9.0
Summary|ICE with segfault on valid |[4.9 Regression] ICE with
|code at -O1, -O2, and -O3 |segfault on valid code at
|on x86_64-linux-gnu |-O1, -O2, and -O3 on
| |x86_64-linux-gnu
Ever confirmed|0 |1
Known to fail| |4.9.0
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2013-11-28 11:24 ` [Bug tree-optimization/59322] [4.9 Regression] " mpolacek at gcc dot gnu.org
@ 2013-11-28 11:26 ` rguenth at gcc dot gnu.org
2013-11-28 12:16 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-11-28 11:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2013-11-28 11:24 ` [Bug tree-optimization/59322] [4.9 Regression] " mpolacek at gcc dot gnu.org
2013-11-28 11:26 ` rguenth at gcc dot gnu.org
@ 2013-11-28 12:16 ` jakub at gcc dot gnu.org
2013-12-02 16:29 ` law at redhat dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-11-28 12:16 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r205279.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (2 preceding siblings ...)
2013-11-28 12:16 ` jakub at gcc dot gnu.org
@ 2013-12-02 16:29 ` law at redhat dot com
2013-12-02 17:59 ` law at redhat dot com
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: law at redhat dot com @ 2013-12-02 16:29 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |antoine.balestrat at gmail dot com
--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
*** Bug 59359 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (3 preceding siblings ...)
2013-12-02 16:29 ` law at redhat dot com
@ 2013-12-02 17:59 ` law at redhat dot com
2013-12-03 3:37 ` law at gcc dot gnu.org
2013-12-03 3:46 ` law at redhat dot com
6 siblings, 0 replies; 8+ messages in thread
From: law at redhat dot com @ 2013-12-02 17:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
Thanks for the bug report. It hits a hunk of code which I've looked at a few
times in the last couple months and haven't been able to convince myself it's
correct or desirable.
In create_edge_and_update_destination_phis, we clone a jump threading path onto
the newly created edge.
That path has a reference to an edge that later gets removed.
Then we look at the path and fault.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (4 preceding siblings ...)
2013-12-02 17:59 ` law at redhat dot com
@ 2013-12-03 3:37 ` law at gcc dot gnu.org
2013-12-03 3:46 ` law at redhat dot com
6 siblings, 0 replies; 8+ messages in thread
From: law at gcc dot gnu.org @ 2013-12-03 3:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
--- Comment #5 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Dec 3 03:36:58 2013
New Revision: 205617
URL: http://gcc.gnu.org/viewcvs?rev=205617&root=gcc&view=rev
Log:
PR tree-optimization/59322
* tree-ssa-threadedge.c (create_edge_and_update_destination_phis):
Remove code which copied jump threading paths.
PR tree-optimization/59322
* gcc.c-torture/compile/pr59322.c: New test
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr59322.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-threadupdate.c
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/59322] [4.9 Regression] ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu
2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
` (5 preceding siblings ...)
2013-12-03 3:37 ` law at gcc dot gnu.org
@ 2013-12-03 3:46 ` law at redhat dot com
6 siblings, 0 replies; 8+ messages in thread
From: law at redhat dot com @ 2013-12-03 3:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59322
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on trunk.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2013-11-28 1:21 [Bug tree-optimization/59322] New: ICE with segfault on valid code at -O1, -O2, and -O3 on x86_64-linux-gnu su at cs dot ucdavis.edu
2013-11-28 11:24 ` [Bug tree-optimization/59322] [4.9 Regression] " mpolacek at gcc dot gnu.org
2013-11-28 11:26 ` rguenth at gcc dot gnu.org
2013-11-28 12:16 ` jakub at gcc dot gnu.org
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