* [Bug middle-end/46034] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
@ 2010-10-15 12:10 ` moonshine at kapsi dot fi
2010-10-15 15:27 ` [Bug middle-end/46034] [4.6 regression] " moonshine at kapsi dot fi
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From: moonshine at kapsi dot fi @ 2010-10-15 12:10 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
--- Comment #1 from Juhani Viheräkoski <moonshine at kapsi dot fi> 2010-10-15 12:10:28 UTC ---
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/misty/gcc/libexec/gcc/i686-pc-linux-gnu/4.6.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/home/misty/gcc
--enable-languages=c,c++ --enable-gold --enable-lto --enable-plugins
--program-suffix=-trunk --enable-checking=yes --disable-stage1-checking
Thread model: posix
gcc version 4.6.0 20101014 (experimental) (GCC)
Revision: 165459
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
2010-10-15 12:10 ` [Bug middle-end/46034] " moonshine at kapsi dot fi
@ 2010-10-15 15:27 ` moonshine at kapsi dot fi
2010-10-27 22:14 ` [Bug rtl-optimization/46034] " pinskia at gcc dot gnu.org
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From: moonshine at kapsi dot fi @ 2010-10-15 15:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
Juhani Viheräkoski <moonshine at kapsi dot fi> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|internal compiler error: |[4.6 regression] internal
|Segmentation fault |compiler error:
| |Segmentation fault
--- Comment #2 from Juhani Viheräkoski <moonshine at kapsi dot fi> 2010-10-15 15:27:10 UTC ---
Compiles with latest 4.5 svn so this is a regression.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
2010-10-15 12:10 ` [Bug middle-end/46034] " moonshine at kapsi dot fi
2010-10-15 15:27 ` [Bug middle-end/46034] [4.6 regression] " moonshine at kapsi dot fi
@ 2010-10-27 22:14 ` pinskia at gcc dot gnu.org
2010-10-27 22:14 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2010.10.27 22:14:25
Component|middle-end |rtl-optimization
Ever Confirmed|0 |1
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-10-27 22:14:25 UTC ---
#0 if_then_else_cond (x=0x7f4d072f7b10, ptrue=0x7fff4c5ea078,
pfalse=0x7fff4c5ea068)
at /home/apinski/src/gcc-fsf/local//gcc/gcc/combine.c:8468
Confirmed.
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (2 preceding siblings ...)
2010-10-27 22:14 ` [Bug rtl-optimization/46034] " pinskia at gcc dot gnu.org
@ 2010-10-27 22:14 ` pinskia at gcc dot gnu.org
2010-10-27 22:17 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:14 UTC (permalink / raw)
To: gcc-bugs
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.6.0
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (3 preceding siblings ...)
2010-10-27 22:14 ` pinskia at gcc dot gnu.org
@ 2010-10-27 22:17 ` pinskia at gcc dot gnu.org
2010-10-27 22:19 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:17 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-10-27 22:16:55 UTC ---
We are going into an infinite loop in if_then_else_cond.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (4 preceding siblings ...)
2010-10-27 22:17 ` pinskia at gcc dot gnu.org
@ 2010-10-27 22:19 ` pinskia at gcc dot gnu.org
2010-10-27 22:34 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:19 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-10-27 22:19:13 UTC ---
But that is because we have something like XOR (ASHIFTRT) Where the operand of
the ASHIFTRT is the same XOR again.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (5 preceding siblings ...)
2010-10-27 22:19 ` pinskia at gcc dot gnu.org
@ 2010-10-27 22:34 ` pinskia at gcc dot gnu.org
2010-10-27 22:38 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:34 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-10-27 22:34:40 UTC ---
The most reduced testcase I could get:
intersect_al(int n, int k)
{
int i;
for (i = 0; i < n; i++)
{
k = __builtin_abs(k);
set_x_next(k / 2);
}
}
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (6 preceding siblings ...)
2010-10-27 22:34 ` pinskia at gcc dot gnu.org
@ 2010-10-27 22:38 ` pinskia at gcc dot gnu.org
2010-10-27 23:00 ` zsojka at seznam dot cz
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From: pinskia at gcc dot gnu.org @ 2010-10-27 22:38 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-10-27 22:38:26 UTC ---
Fails also with revision 164656.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: Segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (7 preceding siblings ...)
2010-10-27 22:38 ` pinskia at gcc dot gnu.org
@ 2010-10-27 23:00 ` zsojka at seznam dot cz
2010-10-28 10:34 ` ebotcazou at gcc dot gnu.org
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From: zsojka at seznam dot cz @ 2010-10-27 23:00 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #8 from Zdenek Sojka <zsojka at seznam dot cz> 2010-10-27 22:59:53 UTC ---
Created attachment 22186
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22186
reduced testcase
Needs only "-O -fexpensive-optimizations" to reproduce
Relevant valgrind output:
$ gcc -O -fexpensive-optimizations testcase2.c
==10818==
==10818== Stack overflow in thread 1: can't grow stack to 0x7fe801fd8
==10818== Can't extend stack to 0x7fe801450 during signal delivery for thread
1:
==10818== no stack segment
==10818==
==10818== Process terminating with default action of signal 11 (SIGSEGV)
==10818== Access not within mapped region at address 0x7FE801450
==10818== at 0xF1C9BB: if_then_else_cond (combine.c:8504)
==10818== If you believe this happened as a result of a stack
==10818== overflow in your program's main thread (unlikely but
==10818== possible), you can try to increase the size of the
==10818== main thread stack using the --main-stacksize= flag.
==10818== The main thread stack size used in this run was 8388608.
==10818== Stack overflow in thread 1: can't grow stack to 0x7fe801f50
gcc: internal compiler error: Segmentation fault (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Tested revisions:
r165985 - crash
r163636 - crash
r161659 - OK
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (8 preceding siblings ...)
2010-10-27 23:00 ` zsojka at seznam dot cz
@ 2010-10-28 10:34 ` ebotcazou at gcc dot gnu.org
2010-10-28 16:05 ` hjl.tools at gmail dot com
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From: ebotcazou at gcc dot gnu.org @ 2010-10-28 10:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |ebotcazou at gcc dot
|gnu.org |gnu.org
--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-10-28 10:34:35 UTC ---
Investigating.
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (9 preceding siblings ...)
2010-10-28 10:34 ` ebotcazou at gcc dot gnu.org
@ 2010-10-28 16:05 ` hjl.tools at gmail dot com
2010-11-01 11:25 ` [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: segmentation fault jakub at gcc dot gnu.org
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From: hjl.tools at gmail dot com @ 2010-10-28 16:05 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-28 16:05:44 UTC ---
It is caused by revision 163383:
http://gcc.gnu.org/ml/gcc-cvs/2010-08/msg00595.html
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (10 preceding siblings ...)
2010-10-28 16:05 ` hjl.tools at gmail dot com
@ 2010-11-01 11:25 ` jakub at gcc dot gnu.org
2010-11-01 21:22 ` ebotcazou at gcc dot gnu.org
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From: jakub at gcc dot gnu.org @ 2010-11-01 11:25 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-01 11:25:04 UTC ---
Created attachment 22218
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22218
gcc46-pr46034.patch
Untested fix.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: segmentation fault
2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (11 preceding siblings ...)
2010-11-01 11:25 ` [Bug rtl-optimization/46034] [4.6 regression] internal compiler error: segmentation fault jakub at gcc dot gnu.org
@ 2010-11-01 21:22 ` ebotcazou at gcc dot gnu.org
2010-11-03 0:28 ` moonshine at kapsi dot fi
2010-11-03 8:31 ` jakub at gcc dot gnu.org
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From: ebotcazou at gcc dot gnu.org @ 2010-11-01 21:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
AssignedTo|ebotcazou at gcc dot |unassigned at gcc dot
|gnu.org |gnu.org
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (12 preceding siblings ...)
2010-11-01 21:22 ` ebotcazou at gcc dot gnu.org
@ 2010-11-03 0:28 ` moonshine at kapsi dot fi
2010-11-03 8:31 ` jakub at gcc dot gnu.org
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From: moonshine at kapsi dot fi @ 2010-11-03 0:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034
Juhani Viheräkoski <moonshine at kapsi dot fi> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #12 from Juhani Viheräkoski <moonshine at kapsi dot fi> 2010-11-03 00:28:06 UTC ---
Tested with original testcase extracted from Ghostscript, passes on
i686-linux-gnu with the proposed patch.
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2010-10-15 11:49 [Bug middle-end/46034] New: internal compiler error: Segmentation fault moonshine at kapsi dot fi
` (13 preceding siblings ...)
2010-11-03 0:28 ` moonshine at kapsi dot fi
@ 2010-11-03 8:31 ` jakub at gcc dot gnu.org
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From: jakub at gcc dot gnu.org @ 2010-11-03 8:31 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-03 08:30:30 UTC ---
Author: jakub
Date: Wed Nov 3 08:30:21 2010
New Revision: 166231
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166231
Log:
PR rtl-optimization/46034
PR rtl-optimization/46212
PR rtl-optimization/46248
* combine.c (try_combine): If added_sets_2 where i0dest_in_i0src
and i0 feeds i1 and i1 feeds i2 or i0 feeds i2, make a copy of i1src
before i0dest -> i0src substitution and pass 1 instead of 0 as last
argument to subst on i2pat.
* gcc.c-torture/compile/pr46034.c: New test.
* gcc.c-torture/compile/pr46248.c: New test.
* gcc.dg/pr46212.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr46034.c
trunk/gcc/testsuite/gcc.c-torture/compile/pr46248.c
trunk/gcc/testsuite/gcc.dg/pr46212.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 16+ messages in thread