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* [Bug c/53495] New: segmentation fault
@ 2012-05-26 14:17 regehr at cs dot utah.edu
2012-05-26 14:34 ` [Bug rtl-optimization/53495] [4.8 Regression] " hjl.tools at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: regehr at cs dot utah.edu @ 2012-05-26 14:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495
Bug #: 53495
Summary: segmentation fault
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: regehr@cs.utah.edu
CC: chenyang@cs.utah.edu
[regehr@dyson r59]$ current-gcc -O1 small.c -c
small.c: In function 'fn4':
small.c:14:1: internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@dyson r59]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r187906-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r187906-install
--program-prefix=r187906- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120526 (experimental) (GCC)
[regehr@dyson r59]$ cat small.c
int a, b, c, d, e, g;
static char
fn1 (char p1, int p2)
{
return p1 || p2 < 0 || p2 >= 1 || 1 >> p2 ? p1 : 0;
}
static long long fn2 (int *, int);
static int fn3 ();
void
fn4 ()
{
fn3 ();
fn2 (&a, d);
}
long long
fn2 (int *p1, int p2)
{
int f = -1L;
for (; c <= 1; c++)
{
*p1 = 0;
*p1 = fn1 (c, p2 ^ f);
}
a = 0;
e = p2;
return 0;
}
int
fn3 ()
{
b = 3;
for (; b; b--)
c++;
g = 0 >= c;
return 0;
}
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu @ 2012-05-26 14:34 ` hjl.tools at gmail dot com 2012-08-13 10:36 ` jakub at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: hjl.tools at gmail dot com @ 2012-05-26 14:34 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495 H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-05-26 Component|c |rtl-optimization CC| |bernds at gcc dot gnu.org Ever Confirmed|0 |1 Summary|segmentation fault |[4.8 Regression] | |segmentation fault Target Milestone|--- |4.8.0 --- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-05-26 14:27:03 UTC --- It is caused by revision 186378: http://gcc.gnu.org/ml/gcc-cvs/2012-04/msg00329.html ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu 2012-05-26 14:34 ` [Bug rtl-optimization/53495] [4.8 Regression] " hjl.tools at gmail dot com @ 2012-08-13 10:36 ` jakub at gcc dot gnu.org 2012-08-13 10:57 ` jakub at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-08-13 10:36 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org |gnu.org | --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-13 10:36:32 UTC --- Created attachment 28003 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28003 gcc48-pr53495.patch The problem is that find_moveable_pseudos creates some extra pseudos/def_insns, but then trivially_dead_insns is called by ira and deletes them (because they were feeding trivially dead insns only). Then move_unallocated_pseudos is called and expects to be able to tweak all the insns find_moveable_pseudos created. The attached untested patch fixes that. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu 2012-05-26 14:34 ` [Bug rtl-optimization/53495] [4.8 Regression] " hjl.tools at gmail dot com 2012-08-13 10:36 ` jakub at gcc dot gnu.org @ 2012-08-13 10:57 ` jakub at gcc dot gnu.org 2012-08-14 7:43 ` jakub at gcc dot gnu.org 2012-08-14 7:50 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-08-13 10:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495 --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-13 10:55:39 UTC --- *** Bug 53411 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu ` (2 preceding siblings ...) 2012-08-13 10:57 ` jakub at gcc dot gnu.org @ 2012-08-14 7:43 ` jakub at gcc dot gnu.org 2012-08-14 7:50 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-08-14 7:43 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495 --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-14 07:43:15 UTC --- Author: jakub Date: Tue Aug 14 07:43:09 2012 New Revision: 190376 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190376 Log: PR middle-end/53411 PR rtl-optimization/53495 * ira.c (ira): Move delete_trivially_dead_insns call before find_moveable_pseudos call. * gcc.c-torture/compile/pr53411.c: New test. * gcc.c-torture/compile/pr53495.c: New test. Added: trunk/gcc/testsuite/gcc.c-torture/compile/pr53411.c trunk/gcc/testsuite/gcc.c-torture/compile/pr53495.c Modified: trunk/gcc/ChangeLog trunk/gcc/ira.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu ` (3 preceding siblings ...) 2012-08-14 7:43 ` jakub at gcc dot gnu.org @ 2012-08-14 7:50 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-08-14 7:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-14 07:50:35 UTC --- Fixed. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-08-14 7:50 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-05-26 14:17 [Bug c/53495] New: segmentation fault regehr at cs dot utah.edu 2012-05-26 14:34 ` [Bug rtl-optimization/53495] [4.8 Regression] " hjl.tools at gmail dot com 2012-08-13 10:36 ` jakub at gcc dot gnu.org 2012-08-13 10:57 ` jakub at gcc dot gnu.org 2012-08-14 7:43 ` jakub at gcc dot gnu.org 2012-08-14 7:50 ` jakub at gcc dot gnu.org
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