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* [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load
@ 2012-05-02 6:10 gary at intrepid dot com
2012-05-02 6:11 ` [Bug tree-optimization/53185] " gary at intrepid dot com
` (9 more replies)
0 siblings, 10 replies; 11+ messages in thread
From: gary at intrepid dot com @ 2012-05-02 6:10 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Bug #: 53185
Summary: segmentation fault in vectorizable_load
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: gary@intrepid.com
CC: nenad@intrepid.com
Target: x86_64
Created attachment 27280
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27280
script to demonstrate compiler segfault
GCC 4.8 trunk revision r187034 encounters a segfault when compiling the
attached test case. This appears to be a relatively recent regression.
Here's the back trace.
Program received signal SIGSEGV, Segmentation fault.
0x0000000000d93153 in vectorizable_load (stmt=0x7ffff1889460,
gsi=0x7fffffffd680, vec_stmt=0x7fffffffd5a0, slp_node=0x0,
slp_node_instance=0x0)
at gcc/tree-vect-stmts.c:4563
4563 ivstep = fold_build2 (MULT_EXPR, TREE_TYPE (ivstep), ivstep,
(gdb) where
#0 0x0000000000d93153 in vectorizable_load (stmt=0x7ffff1889460,
gsi=0x7fffffffd680, vec_stmt=0x7fffffffd5a0, slp_node=0x0,
slp_node_instance=0x0)
at gcc/tree-vect-stmts.c:4563
#1 0x0000000000d978e4 in vect_transform_stmt (stmt=0x7ffff1889460,
gsi=0x7fffffffd680, grouped_store=0x7fffffffd677 "", slp_node=0x0,
slp_node_instance=0x0)
at gcc/tree-vect-stmts.c:5639
#2 0x0000000000dac324 in vect_transform_loop (loop_vinfo=0x1cd0630)
at gcc/tree-vect-loop.c:5461
#3 0x0000000000dbfd08 in vectorize_loops ()
at gcc/tree-vectorizer.c:214
#4 0x0000000000cbf6b4 in tree_vectorize ()
at gcc/tree-ssa-loop.c:218
#5 0x0000000000a22eb0 in execute_one_pass (pass=0x19fdc40)
at gcc/passes.c:2181
#6 0x0000000000a23096 in execute_pass_list (pass=0x19fdc40)
at gcc/passes.c:2236
#7 0x0000000000a230b7 in execute_pass_list (pass=0x19fda60)
at gcc/passes.c:2237
To reproduce, copy the attached do-fail script and gasnet_core.i file to the
gcc build directory, and run do-fail.
The compiler was configured with --disable-bootstrap --disable-multilib and
--enable-checking, however, the failure occurred after a full bootstrap and
with various other configure switches as well.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
@ 2012-05-02 6:11 ` gary at intrepid dot com
2012-05-02 6:43 ` markus at trippelsdorf dot de
` (8 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: gary at intrepid dot com @ 2012-05-02 6:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #1 from Gary Funck <gary at intrepid dot com> 2012-05-02 06:11:21 UTC ---
Created attachment 27281
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27281
pre-processed source that demonstrates compiler segfault
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
2012-05-02 6:11 ` [Bug tree-optimization/53185] " gary at intrepid dot com
@ 2012-05-02 6:43 ` markus at trippelsdorf dot de
2012-05-02 10:47 ` markus at trippelsdorf dot de
` (7 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: markus at trippelsdorf dot de @ 2012-05-02 6:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Markus Trippelsdorf <markus at trippelsdorf dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |markus at trippelsdorf dot
| |de
--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-05-02 06:42:19 UTC ---
% cat test.i
unsigned short a, e;
int *b, *d;
int c;
extern int fn2();
void fn1 () {
void *f;
for (;;) {
fn2 ();
b = f;
e = 0;
for (; e < a; ++e)
b[e] = d[e * c];
}
}
% gcc -O3 test.i
test.i: In function ‘fn1’:
test.i:5:6: internal compiler error: in vectorizable_load, at
tree-vect-stmts.c:4544
void fn1 () {
^
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
2012-05-02 6:11 ` [Bug tree-optimization/53185] " gary at intrepid dot com
2012-05-02 6:43 ` markus at trippelsdorf dot de
@ 2012-05-02 10:47 ` markus at trippelsdorf dot de
2012-05-02 11:28 ` [Bug tree-optimization/53185] [4.8 Regression] " rguenth at gcc dot gnu.org
` (6 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: markus at trippelsdorf dot de @ 2012-05-02 10:47 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Markus Trippelsdorf <markus at trippelsdorf dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |matz at gcc dot gnu.org
--- Comment #3 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-05-02 10:47:10 UTC ---
Started with revision 186530.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (2 preceding siblings ...)
2012-05-02 10:47 ` markus at trippelsdorf dot de
@ 2012-05-02 11:28 ` rguenth at gcc dot gnu.org
2012-05-03 10:59 ` markus at trippelsdorf dot de
` (5 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-05-02 11:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.8.0
Summary|segmentation fault in |[4.8 Regression]
|vectorizable_load |segmentation fault in
| |vectorizable_load
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (3 preceding siblings ...)
2012-05-02 11:28 ` [Bug tree-optimization/53185] [4.8 Regression] " rguenth at gcc dot gnu.org
@ 2012-05-03 10:59 ` markus at trippelsdorf dot de
2012-05-08 16:03 ` gary at intrepid dot com
` (4 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: markus at trippelsdorf dot de @ 2012-05-03 10:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #4 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-05-03 10:59:05 UTC ---
The testcase now (trunk@187082) segfaults in fold_binary_loc:
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 29611]
0x00000000009cb27d in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
(gdb) bt
#0 0x00000000009cb27d in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#1 0x0000000000b574fa in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#2 0x00000000006e29ae in ?? ()
#3 0x0000000000700f28 in vect_transform_stmt(gimple_statement_d*,
gimple_stmt_iterator*, bool*, _slp_tree*, _slp_instance*) ()
#4 0x000000000052a273 in vect_transform_loop(_loop_vec_info*) ()
#5 0x00000000004ffef0 in vectorize_loops() ()
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (4 preceding siblings ...)
2012-05-03 10:59 ` markus at trippelsdorf dot de
@ 2012-05-08 16:03 ` gary at intrepid dot com
2012-05-09 16:21 ` matz at gcc dot gnu.org
` (3 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: gary at intrepid dot com @ 2012-05-08 16:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #5 from Gary Funck <gary at intrepid dot com> 2012-05-08 16:01:50 UTC ---
Ping. Is there an ETA for a fix for this bug? It is preventing us from being
able to merge from the GCC trunk. Thanks.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (5 preceding siblings ...)
2012-05-08 16:03 ` gary at intrepid dot com
@ 2012-05-09 16:21 ` matz at gcc dot gnu.org
2012-05-09 16:44 ` matz at gcc dot gnu.org
` (2 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: matz at gcc dot gnu.org @ 2012-05-09 16:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #6 from Michael Matz <matz at gcc dot gnu.org> 2012-05-09 16:08:37 UTC ---
Author: matz
Date: Wed May 9 16:08:26 2012
New Revision: 187340
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187340
Log:
PR tree-optimization/53185
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Disable
peeling when we see strided loads.
testsuite/
* gcc.dg/vect/pr53185.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr53185.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (6 preceding siblings ...)
2012-05-09 16:21 ` matz at gcc dot gnu.org
@ 2012-05-09 16:44 ` matz at gcc dot gnu.org
2012-05-09 22:17 ` gary at intrepid dot com
2013-02-05 15:34 ` rguenth at gcc dot gnu.org
9 siblings, 0 replies; 11+ messages in thread
From: matz at gcc dot gnu.org @ 2012-05-09 16:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Michael Matz <matz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
--- Comment #7 from Michael Matz <matz at gcc dot gnu.org> 2012-05-09 16:40:31 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (7 preceding siblings ...)
2012-05-09 16:44 ` matz at gcc dot gnu.org
@ 2012-05-09 22:17 ` gary at intrepid dot com
2013-02-05 15:34 ` rguenth at gcc dot gnu.org
9 siblings, 0 replies; 11+ messages in thread
From: gary at intrepid dot com @ 2012-05-09 22:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #8 from Gary Funck <gary at intrepid dot com> 2012-05-09 21:43:28 UTC ---
(In reply to comment #7)
> Fixed.
Confirmed. We're able to rebuild our app. without encountering the
segmentation fault.
Thanks!
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug tree-optimization/53185] [4.8 Regression] segmentation fault in vectorizable_load
2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
` (8 preceding siblings ...)
2012-05-09 22:17 ` gary at intrepid dot com
@ 2013-02-05 15:34 ` rguenth at gcc dot gnu.org
9 siblings, 0 replies; 11+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-02-05 15:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-05 15:33:48 UTC ---
Author: rguenth
Date: Tue Feb 5 15:33:35 2013
New Revision: 195759
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195759
Log:
2013-02-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/53342
PR tree-optimization/53185
* tree-vectorizer.h (vect_check_strided_load): Remove.
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Do
not disallow peeling for vectorized strided loads.
(vect_check_strided_load): Make static and simplify.
(vect_analyze_data_refs): Adjust.
* tree-vect-stmts.c (vectorizable_load): Handle peeled loops
correctly when vectorizing strided loads.
* gcc.dg/vect/pr53185-2.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr53185-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
trunk/gcc/tree-vect-stmts.c
trunk/gcc/tree-vectorizer.h
^ permalink raw reply [flat|nested] 11+ messages in thread
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2012-05-02 6:10 [Bug tree-optimization/53185] New: segmentation fault in vectorizable_load gary at intrepid dot com
2012-05-02 6:11 ` [Bug tree-optimization/53185] " gary at intrepid dot com
2012-05-02 6:43 ` markus at trippelsdorf dot de
2012-05-02 10:47 ` markus at trippelsdorf dot de
2012-05-02 11:28 ` [Bug tree-optimization/53185] [4.8 Regression] " rguenth at gcc dot gnu.org
2012-05-03 10:59 ` markus at trippelsdorf dot de
2012-05-08 16:03 ` gary at intrepid dot com
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