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* [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc
@ 2013-05-22 21:49 dhazeghi at yahoo dot com
2013-05-23 8:05 ` [Bug rtl-optimization/57381] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: dhazeghi at yahoo dot com @ 2013-05-22 21:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57381
Bug ID: 57381
Summary: array of volatile pointers hangs gcc
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: dhazeghi at yahoo dot com
The following code causes gcc trunk and 4.8 branch to hang at -O1 or above due
to it consuming all available memory (well over 2GB after 10 seconds).
$ gcc-trunk -v
Target: x86_64-unknown-linux-gnu
gcc version 4.9.0 20130522 (experimental) [trunk revision 199191] (GCC)
$ time gcc-trunk -O0 -c small.c
real 0m0.023s
user 0m0.008s
sys 0m0.008s
$ time gcc-4.7 -O1 -c small.c
real 0m0.028s
user 0m0.004s
sys 0m0.016s
$ time timeout 10 gcc-trunk -O1 -c small.c
real 0m10.002s
user 0m0.000s
sys 0m0.004s
$ echo $?
124
----------------------------------
struct S0 { int f0, f1, f2; };
struct S1 {
int f0;
volatile struct S0 f2;
};
static struct S1 s = {0x47BED265,{0x06D4EB3E,5,0U}};
int foo(struct S0 p)
{
for (s.f2.f2 = 0; (s.f2.f2 <= 12); s.f2.f2++)
{
volatile int *l_61[5][2][2] =
{{{&s.f2.f0,&s.f2.f0},{&s.f2.f0,&s.f2.f0}},{{&s.f2.f0,&s.f2.f0},{&s.f2.f0,&s.f2.f0}},{{&s.f2.f0,(void*)0},{&s.f2.f0,&s.f2.f0}},{{&s.f2.f0,&s.f2.f0},{&s.f2.f0,&s.f2.f0}},{{&s.f2.f0,&s.f2.f0},{(void*)0,&s.f2.f0}}};
volatile int **l_68 = &l_61[0][0][1];
volatile int *l_76 = &s.f2.f0;
(*l_68) = l_61[0][0][0];
if ((*l_76 = (p.f2 % 5))) ;
}
return p.f0;
}
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57381] [4.8/4.9 Regression] array of volatile pointers hangs gcc
2013-05-22 21:49 [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc dhazeghi at yahoo dot com
@ 2013-05-23 8:05 ` rguenth at gcc dot gnu.org
2013-05-23 10:09 ` [Bug rtl-optimization/57381] [4.8 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-05-23 8:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57381
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2013-05-23
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |4.8.1
Summary|array of volatile pointers |[4.8/4.9 Regression] array
|hangs gcc |of volatile pointers hangs
| |gcc
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine. Hangs in
0x0000000000caeac6 in visit_use (use=0x7ffff6e3eee8)
at /space/rguenther/src/svn/trunk/gcc/tree-ssa-sccvn.c:3469
3469 changed = visit_reference_op_store (lhs, rhs1, stmt);
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57381] [4.8 Regression] array of volatile pointers hangs gcc
2013-05-22 21:49 [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc dhazeghi at yahoo dot com
2013-05-23 8:05 ` [Bug rtl-optimization/57381] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
@ 2013-05-23 10:09 ` rguenth at gcc dot gnu.org
2013-08-29 13:15 ` jakub at gcc dot gnu.org
2013-08-29 13:18 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-05-23 10:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57381
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.0
Target Milestone|4.8.1 |4.8.2
Summary|[4.8/4.9 Regression] array |[4.8 Regression] array of
|of volatile pointers hangs |volatile pointers hangs gcc
|gcc |
Known to fail| |4.8.1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 23 10:08:33 2013
New Revision: 199240
URL: http://gcc.gnu.org/viewcvs?rev=199240&root=gcc&view=rev
Log:
2013-05-23 Richard Biener <rguenther@suse.de>
PR middle-end/57381
* fold-const.c (operand_equal_p): Compare FIELD_DECLs with
OEP_CONSTANT_ADDRESS_OF retained.
* gcc.dg/torture/pr57381.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr57381.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57381] [4.8 Regression] array of volatile pointers hangs gcc
2013-05-22 21:49 [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc dhazeghi at yahoo dot com
2013-05-23 8:05 ` [Bug rtl-optimization/57381] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
2013-05-23 10:09 ` [Bug rtl-optimization/57381] [4.8 " rguenth at gcc dot gnu.org
@ 2013-08-29 13:15 ` jakub at gcc dot gnu.org
2013-08-29 13:18 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-08-29 13:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57381
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Aug 29 13:14:59 2013
New Revision: 202074
URL: http://gcc.gnu.org/viewcvs?rev=202074&root=gcc&view=rev
Log:
Backported from mainline
2013-07-22 Georg-Johann Lay <avr@gjlay.de>
PR testsuite/52641
* gcc.dg/torture/pr57381.c: Add dg-require-effective-target int32plus.
2013-05-27 Richard Biener <rguenther@suse.de>
PR middle-end/57381
PR tree-optimization/57417
* tree-ssa-sccvn.c (vn_reference_fold_indirect): Fix test
for unchanged base.
(set_ssa_val_to): Compare addresses using
get_addr_base_and_unit_offset.
PR tree-optimization/57417
* gcc.dg/torture/pr57417.c: New testcase.
2013-05-23 Richard Biener <rguenther@suse.de>
PR middle-end/57381
* gcc.dg/torture/pr57381.c: New testcase.
Added:
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57381.c
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57417.c
Modified:
branches/gcc-4_8-branch/gcc/ChangeLog
branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
branches/gcc-4_8-branch/gcc/tree-ssa-sccvn.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57381] [4.8 Regression] array of volatile pointers hangs gcc
2013-05-22 21:49 [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc dhazeghi at yahoo dot com
` (2 preceding siblings ...)
2013-08-29 13:15 ` jakub at gcc dot gnu.org
@ 2013-08-29 13:18 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-08-29 13:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57381
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2013-08-29 13:18 UTC | newest]
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2013-05-22 21:49 [Bug rtl-optimization/57381] New: array of volatile pointers hangs gcc dhazeghi at yahoo dot com
2013-05-23 8:05 ` [Bug rtl-optimization/57381] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
2013-05-23 10:09 ` [Bug rtl-optimization/57381] [4.8 " rguenth at gcc dot gnu.org
2013-08-29 13:15 ` jakub at gcc dot gnu.org
2013-08-29 13:18 ` jakub at gcc dot gnu.org
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