* [Bug c/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
@ 2009-04-24 15:41 ` rguenth at gcc dot gnu dot org
2009-05-05 15:58 ` [Bug middle-end/39886] " mmitchel at gcc dot gnu dot org
` (9 subsequent siblings)
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From: rguenth at gcc dot gnu dot org @ 2009-04-24 15:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2009-04-24 15:41 -------
Confirmed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |ice-on-valid-code
Last reconfirmed|0000-00-00 00:00:00 |2009-04-24 15:41:03
date| |
Summary|ICE in purge_dead_edges, at |[4.5 Regression] ICE in
|cfgrtl.c:2274 |purge_dead_edges, at
| |cfgrtl.c:2274
Target Milestone|--- |4.5.0
Version|unknown |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
2009-04-24 15:41 ` [Bug c/39886] [4.5 Regression] " rguenth at gcc dot gnu dot org
@ 2009-05-05 15:58 ` mmitchel at gcc dot gnu dot org
2009-05-09 18:30 ` hubicka at ucw dot cz
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2009-05-05 15:58 UTC (permalink / raw)
To: gcc-bugs
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
2009-04-24 15:41 ` [Bug c/39886] [4.5 Regression] " rguenth at gcc dot gnu dot org
2009-05-05 15:58 ` [Bug middle-end/39886] " mmitchel at gcc dot gnu dot org
@ 2009-05-09 18:30 ` hubicka at ucw dot cz
2009-07-01 15:47 ` bonzini at gnu dot org
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: hubicka at ucw dot cz @ 2009-05-09 18:30 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hubicka at ucw dot cz 2009-05-09 18:29 -------
Subject: Re: [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
The problem here is that combine constructs (set (pc) (pc)) as noo-op
move expecting it to be removed immediately. It is however
misinterpreted as jump that is giong to be removed at the end of BB and
update_cfg_for_uncondjump add FALLTHRU flag on the edge that fails in
verification.
Interestingly enough modifying update_cfg_for_uncondjump to ignore insns
that are not last in BB seem to cause miscompilations in testsuite....
I am looking into the cgraph failures now, but this should be easy to
fix.
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (2 preceding siblings ...)
2009-05-09 18:30 ` hubicka at ucw dot cz
@ 2009-07-01 15:47 ` bonzini at gnu dot org
2009-07-02 10:05 ` hubicka at ucw dot cz
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: bonzini at gnu dot org @ 2009-07-01 15:47 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from bonzini at gnu dot org 2009-07-01 15:47 -------
Honza, this worked for me:
Index: combine.c
===================================================================
--- combine.c (revision 149135)
+++ combine.c (working copy)
@@ -2173,12 +2173,13 @@
update_cfg_for_uncondjump (rtx insn)
{
basic_block bb = BLOCK_FOR_INSN (insn);
+ bool at_end = (BB_END (bb) == insn);
- if (BB_END (bb) == insn)
+ if (at_end)
purge_dead_edges (bb);
delete_insn (insn);
- if (EDGE_COUNT (bb->succs) == 1)
+ if (at_end && EDGE_COUNT (bb->succs) == 1)
single_succ_edge (bb)->flags |= EDGE_FALLTHRU;
}
Would you mind seeing if your patch was the same?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (3 preceding siblings ...)
2009-07-01 15:47 ` bonzini at gnu dot org
@ 2009-07-02 10:05 ` hubicka at ucw dot cz
2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
` (5 subsequent siblings)
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From: hubicka at ucw dot cz @ 2009-07-02 10:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from hubicka at ucw dot cz 2009-07-02 10:05 -------
Subject: Re: [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
> Would you mind seeing if your patch was the same?
I wanted to prevent the (set pc pc) trick, but this seems like easier fix
for the problem :)
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (4 preceding siblings ...)
2009-07-02 10:05 ` hubicka at ucw dot cz
@ 2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: d dot g dot gorbachev at gmail dot com @ 2009-07-11 21:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from d dot g dot gorbachev at gmail dot com 2009-07-11 21:55 -------
See also bug 40716.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (5 preceding siblings ...)
2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
@ 2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
2009-09-03 15:10 ` fxcoudert at gcc dot gnu dot org
` (3 subsequent siblings)
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From: d dot g dot gorbachev at gmail dot com @ 2009-07-11 21:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from d dot g dot gorbachev at gmail dot com 2009-07-11 21:55 -------
*** Bug 40716 has been marked as a duplicate of this bug. ***
--
d dot g dot gorbachev at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |d dot g dot gorbachev at
| |gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (6 preceding siblings ...)
2009-07-11 21:56 ` d dot g dot gorbachev at gmail dot com
@ 2009-09-03 15:10 ` fxcoudert at gcc dot gnu dot org
2009-09-19 17:29 ` [Bug middle-end/39886] [4.5 Regression] Revision 145283 caused " hjl dot tools at gmail dot com
` (2 subsequent siblings)
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From: fxcoudert at gcc dot gnu dot org @ 2009-09-03 15:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from fxcoudert at gcc dot gnu dot org 2009-09-03 15:10 -------
Also happens on i586-pc-mingw32 and with -m64 on i386-apple-darwin9. This P1
regression is more than 4 months old, and has a proposed patch; could someone
post the patch for review?
--
fxcoudert at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
GCC target triplet|i686-pc-linux-gnu, x86- |i686
|linux-gnu |
Keywords| |patch
Last reconfirmed|2009-06-21 23:34:38 |2009-09-03 15:10:10
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] Revision 145283 caused ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (7 preceding siblings ...)
2009-09-03 15:10 ` fxcoudert at gcc dot gnu dot org
@ 2009-09-19 17:29 ` hjl dot tools at gmail dot com
2009-09-20 9:24 ` ktietz at gcc dot gnu dot org
2009-09-20 17:26 ` [Bug rtl-optimization/39886] " ktietz at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: hjl dot tools at gmail dot com @ 2009-09-19 17:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from hjl dot tools at gmail dot com 2009-09-19 17:29 -------
It is caused by revision 145283:
http://gcc.gnu.org/ml/gcc-cvs/2009-03/msg00790.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.5 Regression] ICE in |[4.5 Regression] Revision
|purge_dead_edges, at |145283 caused ICE in
|cfgrtl.c:2274 |purge_dead_edges, at
| |cfgrtl.c:2274
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/39886] [4.5 Regression] Revision 145283 caused ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (8 preceding siblings ...)
2009-09-19 17:29 ` [Bug middle-end/39886] [4.5 Regression] Revision 145283 caused " hjl dot tools at gmail dot com
@ 2009-09-20 9:24 ` ktietz at gcc dot gnu dot org
2009-09-20 17:26 ` [Bug rtl-optimization/39886] " ktietz at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: ktietz at gcc dot gnu dot org @ 2009-09-20 9:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from ktietz at gcc dot gnu dot org 2009-09-20 09:24 -------
Fixed on trunk at revision 151895.
--
ktietz at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug rtl-optimization/39886] [4.5 Regression] Revision 145283 caused ICE in purge_dead_edges, at cfgrtl.c:2274
2009-04-24 15:01 [Bug c/39886] New: ICE in purge_dead_edges, at cfgrtl.c:2274 regehr at cs dot utah dot edu
` (9 preceding siblings ...)
2009-09-20 9:24 ` ktietz at gcc dot gnu dot org
@ 2009-09-20 17:26 ` ktietz at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: ktietz at gcc dot gnu dot org @ 2009-09-20 17:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from ktietz at gcc dot gnu dot org 2009-09-20 17:26 -------
*** Bug 40364 has been marked as a duplicate of this bug. ***
--
ktietz at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dopefishjustin at gmail dot
| |com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39886
^ permalink raw reply [flat|nested] 12+ messages in thread