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* [Bug tree-optimization/16864] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
@ 2004-08-03 20:06 ` dberlin at gcc dot gnu dot org
2004-08-03 20:10 ` dberlin at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: dberlin at gcc dot gnu dot org @ 2004-08-03 20:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dberlin at gcc dot gnu dot org 2004-08-03 20:06 -------
Created an attachment (id=6874)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6874&action=view)
Minimal testcase for this bug
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination
@ 2004-08-03 20:06 dberlin at gcc dot gnu dot org
2004-08-03 20:06 ` [Bug tree-optimization/16864] " dberlin at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: dberlin at gcc dot gnu dot org @ 2004-08-03 20:06 UTC (permalink / raw)
To: gcc-bugs
The attached testcase causes a segmentation fault in tree tailcall elimination.
It looks like it expects local1 (a static), to have a default_def, which it
doesn't
--
Summary: Segmentation fault during tree tail call elimination
Product: gcc
Version: 3.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: rakdver at gcc dot gnu dot org
ReportedBy: dberlin at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
2004-08-03 20:06 ` [Bug tree-optimization/16864] " dberlin at gcc dot gnu dot org
@ 2004-08-03 20:10 ` dberlin at gcc dot gnu dot org
2004-08-03 20:49 ` [Bug tree-optimization/16864] [3.5 Regression] " pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: dberlin at gcc dot gnu dot org @ 2004-08-03 20:10 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dberlin at gcc dot gnu dot org 2004-08-03 20:10 -------
Sorry, thought Zdenek wrote the tailcall part
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|rakdver at gcc dot gnu dot |hubicka at gcc dot gnu dot
|org |org
Status|UNCONFIRMED |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] [3.5 Regression] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
2004-08-03 20:06 ` [Bug tree-optimization/16864] " dberlin at gcc dot gnu dot org
2004-08-03 20:10 ` dberlin at gcc dot gnu dot org
@ 2004-08-03 20:49 ` pinskia at gcc dot gnu dot org
2004-08-04 12:27 ` rakdver at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-08-03 20:49 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Last reconfirmed|0000-00-00 00:00:00 |2004-08-03 20:49:02
date| |
Summary|Segmentation fault during |[3.5 Regression]
|tree tail call elimination |Segmentation fault during
| |tree tail call elimination
Target Milestone|--- |3.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] [3.5 Regression] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-08-03 20:49 ` [Bug tree-optimization/16864] [3.5 Regression] " pinskia at gcc dot gnu dot org
@ 2004-08-04 12:27 ` rakdver at gcc dot gnu dot org
2004-08-05 8:42 ` rakdver at gcc dot gnu dot org
2004-08-05 8:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-08-04 12:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-08-04 12:27 -------
Actually I believe the code in question is mine.
This patch should fix the problem, I will send it to gcc-patches once
it passes testing.
Index: tree-tailcall.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/tree-tailcall.c,v
retrieving revision 2.19
diff -c -3 -p -r2.19 tree-tailcall.c
*** tree-tailcall.c 28 Jul 2004 05:13:09 -0000 2.19
--- tree-tailcall.c 4 Aug 2004 12:24:55 -0000
*************** eliminate_tail_call (struct tailcall *t)
*** 730,736 ****
if (!phi)
{
tree name = var_ann (param)->default_def;
! tree new_name = make_ssa_name (param, SSA_NAME_DEF_STMT (name));
var_ann (param)->default_def = new_name;
phi = create_phi_node (name, first);
--- 730,746 ----
if (!phi)
{
tree name = var_ann (param)->default_def;
! tree new_name;
!
! if (!name)
! {
! /* It may happen that the tag does not have a default_def in case
! when all uses of it are dominated by a MUST_DEF. This however
! means that it is not necessary to add a phi node for this
! tag. */
! continue;
! }
! new_name = make_ssa_name (param, SSA_NAME_DEF_STMT (name));
var_ann (param)->default_def = new_name;
phi = create_phi_node (name, first);
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|hubicka at gcc dot gnu dot |rakdver at gcc dot gnu dot
|org |org
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] [3.5 Regression] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-08-04 12:27 ` rakdver at gcc dot gnu dot org
@ 2004-08-05 8:42 ` rakdver at gcc dot gnu dot org
2004-08-05 8:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-08-05 8:42 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-08-05 08:42 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/16864] [3.5 Regression] Segmentation fault during tree tail call elimination
2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-08-05 8:42 ` rakdver at gcc dot gnu dot org
@ 2004-08-05 8:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-08-05 8:42 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-08-05 08:42 -------
Subject: Bug 16864
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rakdver@gcc.gnu.org 2004-08-05 08:41:57
Modified files:
gcc : ChangeLog tree-tailcall.c
Log message:
PR tree-optimization/16864
* tree-tailcall.c (eliminate_tail_call): Do not create phi nodes
for ssa names without default_def.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.4808&r2=2.4809
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-tailcall.c.diff?cvsroot=gcc&r1=2.19&r2=2.20
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16864
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2004-08-05 8:42 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2004-08-03 20:06 [Bug tree-optimization/16864] New: Segmentation fault during tree tail call elimination dberlin at gcc dot gnu dot org
2004-08-03 20:06 ` [Bug tree-optimization/16864] " dberlin at gcc dot gnu dot org
2004-08-03 20:10 ` dberlin at gcc dot gnu dot org
2004-08-03 20:49 ` [Bug tree-optimization/16864] [3.5 Regression] " pinskia at gcc dot gnu dot org
2004-08-04 12:27 ` rakdver at gcc dot gnu dot org
2004-08-05 8:42 ` rakdver at gcc dot gnu dot org
2004-08-05 8:42 ` cvs-commit at gcc dot gnu dot org
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