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* [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use
@ 2011-07-23 14:06 rearnsha at gcc dot gnu.org
2011-07-24 21:29 ` [Bug tree-optimization/49822] [4.7 " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: rearnsha at gcc dot gnu.org @ 2011-07-23 14:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822
Summary: [gcc-4.7 regression] Segfault in
remove_prop_source_from_use
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rearnsha@gcc.gnu.org
Target: arm-eabi
Created attachment 24815
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24815
testcase
Attached testcase segfaults GCC for arm-eabi when compiled with
cc1 -marm -mcpu=arm7tdmi -Os -fno-short-enums
This was caused by:
2011-07-21 Richard Guenther <rguenther@suse.de>
* tree-ssa-forwprop.c (combine_conversions): Return whether
we have to run cfg-cleanup. Properly remove dead stmts.
(ssa_forward_propagate_and_combine): Adjust.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/49822] [4.7 regression] Segfault in remove_prop_source_from_use
2011-07-23 14:06 [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use rearnsha at gcc dot gnu.org
@ 2011-07-24 21:29 ` pinskia at gcc dot gnu.org
2011-07-25 10:17 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2011-07-24 21:29 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.7.0
Summary|[gcc-4.7 regression] |[4.7 regression] Segfault
|Segfault in |in
|remove_prop_source_from_use |remove_prop_source_from_use
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/49822] [4.7 regression] Segfault in remove_prop_source_from_use
2011-07-23 14:06 [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use rearnsha at gcc dot gnu.org
2011-07-24 21:29 ` [Bug tree-optimization/49822] [4.7 " pinskia at gcc dot gnu.org
@ 2011-07-25 10:17 ` rguenth at gcc dot gnu.org
2011-07-25 14:15 ` rguenth at gcc dot gnu.org
2011-07-26 11:04 ` rearnsha at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-07-25 10:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2011.07.25 10:17:10
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-25 10:17:10 UTC ---
Confirmed. Reproduced with a cross to arm-linux-eabi. I have a patch.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/49822] [4.7 regression] Segfault in remove_prop_source_from_use
2011-07-23 14:06 [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use rearnsha at gcc dot gnu.org
2011-07-24 21:29 ` [Bug tree-optimization/49822] [4.7 " pinskia at gcc dot gnu.org
2011-07-25 10:17 ` rguenth at gcc dot gnu.org
@ 2011-07-25 14:15 ` rguenth at gcc dot gnu.org
2011-07-26 11:04 ` rearnsha at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-07-25 14:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-25 14:15:06 UTC ---
Author: rguenth
Date: Mon Jul 25 14:15:02 2011
New Revision: 176745
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176745
Log:
2011-07-25 Richard Guenther <rguenther@suse.de>
PR tree-optimization/49822
* tree-ssa-forwprop.c (remove_prop_source_from_use): Robustify
more. Make sure to preserve stmts with side-effects. Properly
handle virtual defs, follow a longer def chain.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/49822] [4.7 regression] Segfault in remove_prop_source_from_use
2011-07-23 14:06 [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use rearnsha at gcc dot gnu.org
` (2 preceding siblings ...)
2011-07-25 14:15 ` rguenth at gcc dot gnu.org
@ 2011-07-26 11:04 ` rearnsha at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rearnsha at gcc dot gnu.org @ 2011-07-26 11:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> 2011-07-26 11:04:23 UTC ---
Confirmed as fixing original problem.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2011-07-23 14:06 [Bug tree-optimization/49822] New: [gcc-4.7 regression] Segfault in remove_prop_source_from_use rearnsha at gcc dot gnu.org
2011-07-24 21:29 ` [Bug tree-optimization/49822] [4.7 " pinskia at gcc dot gnu.org
2011-07-25 10:17 ` rguenth at gcc dot gnu.org
2011-07-25 14:15 ` rguenth at gcc dot gnu.org
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