* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
@ 2013-09-18 15:25 ` d.g.gorbachev at gmail dot com
2013-09-18 15:26 ` d.g.gorbachev at gmail dot com
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: d.g.gorbachev at gmail dot com @ 2013-09-18 15:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
--- Comment #1 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> ---
Created attachment 30857
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30857&action=edit
Testcase (somewhat minimized). Compile with -O3.
GCC 20130331 (rev. 197291) - works, 20130526 (rev. 199345) - fails.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
2013-09-18 15:25 ` [Bug tree-optimization/58464] " d.g.gorbachev at gmail dot com
@ 2013-09-18 15:26 ` d.g.gorbachev at gmail dot com
2013-09-19 15:18 ` mpolacek at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: d.g.gorbachev at gmail dot com @ 2013-09-18 15:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
--- Comment #2 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> ---
Created attachment 30858
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30858&action=edit
Original preprocessed file
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
2013-09-18 15:25 ` [Bug tree-optimization/58464] " d.g.gorbachev at gmail dot com
2013-09-18 15:26 ` d.g.gorbachev at gmail dot com
@ 2013-09-19 15:18 ` mpolacek at gcc dot gnu.org
2013-09-19 15:32 ` mpolacek at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2013-09-19 15:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-09-19
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Whoops. Confirmed.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (2 preceding siblings ...)
2013-09-19 15:18 ` mpolacek at gcc dot gnu.org
@ 2013-09-19 15:32 ` mpolacek at gcc dot gnu.org
2013-09-23 10:23 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2013-09-19 15:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.0
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r198333.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (3 preceding siblings ...)
2013-09-19 15:32 ` mpolacek at gcc dot gnu.org
@ 2013-09-23 10:23 ` rguenth at gcc dot gnu.org
2013-09-23 13:19 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-09-23 10:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Translating {component_ref<cur>,mem_ref<0B>,result_296}@.MEM_407 through
<bb 141>:
goto <bb 63>;
<bb 63>:
# min_size_293 = PHI <min_size_274(62), 8000(141)>
_294 = min_size_293 + 16;
# .MEM_406 = VDEF <.MEM_405>
base_295 = xmalloc (_294);
result_296 = base_295 + min_size_293;
# .MEM_407 = VDEF <.MEM_406>
result_296->cur = base_295;
goto <bb 68>;
recurses via
1774 phitrans = phi_translate_1 (expr, set1, set2, pred, phiblock);
(gdb) call debug_pre_expr (expr)
{pointer_plus_expr,base_295,min_size_293}
1774 phitrans = phi_translate_1 (expr, set1, set2, pred, phiblock);
(gdb) call debug_pre_expr (expr)
{component_ref<cur>,mem_ref<0B>,result_296}@.MEM_407
where {component_ref<cur>,mem_ref<0B>,result_296}@.MEM_407 is the leader
for base_295 and {pointer_plus_expr,base_295,min_size_293} is the leader
for result_296.
So that circumvents
leader = find_leader_in_sets (op_val_id, set1, set2);
if (!leader)
break;
/* Make sure we do not recursively translate ourselves
like for translating a[n_1] with the leader for
n_1 being a[n_1]. */
if (get_expression_id (leader) != get_expression_id (expr))
{
because it's a recursion with two levels ...
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (4 preceding siblings ...)
2013-09-23 10:23 ` rguenth at gcc dot gnu.org
@ 2013-09-23 13:19 ` rguenth at gcc dot gnu.org
2013-10-03 7:19 ` Ganesh.Gopalasubramanian at amd dot com
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-09-23 13:19 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (5 preceding siblings ...)
2013-09-23 13:19 ` rguenth at gcc dot gnu.org
@ 2013-10-03 7:19 ` Ganesh.Gopalasubramanian at amd dot com
2013-10-10 14:07 ` rguenth at gcc dot gnu.org
2013-12-12 18:20 ` dominiq at lps dot ens.fr
8 siblings, 0 replies; 10+ messages in thread
From: Ganesh.Gopalasubramanian at amd dot com @ 2013-10-03 7:19 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
GGanesh <Ganesh.Gopalasubramanian at amd dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |Ganesh.Gopalasubramanian@am
| |d.com
--- Comment #9 from GGanesh <Ganesh.Gopalasubramanian at amd dot com> ---
Seems the fix is regressing rnflow of pb11.
Runtime log of rnflow
Before revision 202826
0:35.558 -> Completed program execution
After revision 202826 (after fix)
0:53.023 -> Completed program execution
The suse polyhedron benchmark log also shows this (after sep23).
http://gcc.opensuse.org/c++bench/polyhedron/polyhedron-summary.txt
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (6 preceding siblings ...)
2013-10-03 7:19 ` Ganesh.Gopalasubramanian at amd dot com
@ 2013-10-10 14:07 ` rguenth at gcc dot gnu.org
2013-12-12 18:20 ` dominiq at lps dot ens.fr
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-10 14:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
Bug 58464 depends on bug 58656, which changed state.
Bug 58656 Summary: [4.9 Regression] rnflow regressing after r202826
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58656
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug tree-optimization/58464] [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate)
2013-09-18 15:22 [Bug tree-optimization/58464] New: [4.9 Regression] Crashes with SIGSEGV (infinite recursion in phi_translate) d.g.gorbachev at gmail dot com
` (7 preceding siblings ...)
2013-10-10 14:07 ` rguenth at gcc dot gnu.org
@ 2013-12-12 18:20 ` dominiq at lps dot ens.fr
8 siblings, 0 replies; 10+ messages in thread
From: dominiq at lps dot ens.fr @ 2013-12-12 18:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58464
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Seems the fix is regressing rnflow of pb11.
Confirmed. I have opened pr59487.
^ permalink raw reply [flat|nested] 10+ messages in thread