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* [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
@ 2010-11-16 1:20 zsojka at seznam dot cz
2010-11-16 1:59 ` [Bug tree-optimization/46494] " hjl.tools at gmail dot com
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: zsojka at seznam dot cz @ 2010-11-16 1:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Summary: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info
failed when casting-out attribute noreturn with
-fno-tree-ccp -fno-tree-fre -ftree-vrp
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zsojka@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 22416
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22416
reduced testcase
+++ This bug was initially created as a clone of Bug #46165 +++
The testcase for PR46165 fails at least in 4.4, 4.5 and 4.6 with following
message:
Compiler output:
$ gcc -O -fno-tree-ccp -fno-tree-fre -ftree-vrp testcase.c
testcase.c: In function 'g':
testcase.c:2:6: error: control flow in the middle of basic block 2
testcase.c:2:6: internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Tested revisions:
r166763 - crash
4.5 r166509 - crash
4.4 r166509 - crash
The original bisect shown it might be caused by r119657, so I am leaving the
4.3 regression mark.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
@ 2010-11-16 1:59 ` hjl.tools at gmail dot com
2010-11-16 10:25 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: hjl.tools at gmail dot com @ 2010-11-16 1:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2010.11.16 01:32:45
Ever Confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-16 01:32:45 UTC ---
I verified that revision 119657 is the trigger.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
2010-11-16 1:59 ` [Bug tree-optimization/46494] " hjl.tools at gmail dot com
@ 2010-11-16 10:25 ` rguenth at gcc dot gnu.org
2010-11-22 15:05 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-11-16 10:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.3.6
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
2010-11-16 1:59 ` [Bug tree-optimization/46494] " hjl.tools at gmail dot com
2010-11-16 10:25 ` rguenth at gcc dot gnu.org
@ 2010-11-22 15:05 ` jakub at gcc dot gnu.org
2010-11-25 16:06 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-11-22 15:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-22 15:01:42 UTC ---
In vrp the problem is just that loop_optimizer_finalize (unnecessarily) calls
verify_flow_info. VRP already has TODO_cleanup_cfg and loop_optimizer_finalize
is the last thing done in execute_vrp, so the cfg will be properly cleaned up.
I'd say a fix could be if we had an argument to loop_optimizer_finalize whether
to do flow verification or not, and pass 0 here in vrp, perhaps other places
too.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
` (2 preceding siblings ...)
2010-11-22 15:05 ` jakub at gcc dot gnu.org
@ 2010-11-25 16:06 ` rguenth at gcc dot gnu.org
2011-02-14 8:59 ` ebotcazou at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-11-25 16:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking
Priority|P3 |P2
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-25 16:02:19 UTC ---
Make it return a TODO instead. Of course the
#ifdef ENABLE_CHECKING
/* FIXME: no point to verify flow info after bundling on ia64. Use this
hack for achieving this. */
if (!reload_completed)
verify_flow_info ();
#endif
hack is odd and probably instead should go into verify_flow_info.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
` (3 preceding siblings ...)
2010-11-25 16:06 ` rguenth at gcc dot gnu.org
@ 2011-02-14 8:59 ` ebotcazou at gcc dot gnu.org
2011-02-14 18:01 ` ebotcazou at gcc dot gnu.org
2011-02-14 18:13 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-02-14 8:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |ebotcazou at gcc dot
| |gnu.org
AssignedTo|unassigned at gcc dot |ebotcazou at gcc dot
|gnu.org |gnu.org
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-02-14 08:40:11 UTC ---
Fixing.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
` (4 preceding siblings ...)
2011-02-14 8:59 ` ebotcazou at gcc dot gnu.org
@ 2011-02-14 18:01 ` ebotcazou at gcc dot gnu.org
2011-02-14 18:13 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-02-14 18:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-02-14 17:59:13 UTC ---
Author: ebotcazou
Date: Mon Feb 14 17:59:10 2011
New Revision: 170141
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170141
Log:
PR tree-optimization/46494
* loop-unroll.c (split_edge_and_insert): Adjust comment.
* loop-init.c (loop_optimizer_finalize): Do not call verify_flow_info.
(pass_rtl_loop_done): Add TODO_verify_flow.
* fwprop.c (pass_rtl_fwprop): Likewise.
* modulo-sched.c (pass_sms): Likewise.
* tree-ssa-dom.c (pass_dominator): Likewise.
* tree-ssa-loop-ch.c (pass_ch): Likewise.
* tree-ssa-loop.c (pass_complete_unrolli): Likewise.
(pass_tree_loop_done): Likewise.
* tree-ssa-pre.c (execute_pre): Likewise.
* tree-ssa-reassoc.c (pass_reassoc): Likewise.
* tree-ssa-sink.c (pass_sink_code): Likewise.
* tree-vrp.c (pass_vrp): Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/pr46494.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fwprop.c
trunk/gcc/loop-init.c
trunk/gcc/loop-unroll.c
trunk/gcc/modulo-sched.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dom.c
trunk/gcc/tree-ssa-loop-ch.c
trunk/gcc/tree-ssa-loop.c
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-reassoc.c
trunk/gcc/tree-ssa-sink.c
trunk/gcc/tree-vrp.c
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/46494] [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp
2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
` (5 preceding siblings ...)
2011-02-14 18:01 ` ebotcazou at gcc dot gnu.org
@ 2011-02-14 18:13 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-02-14 18:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46494
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|4.3.6 |4.6.0
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-02-14 18:01:42 UTC ---
Not user-visible on release branches.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2010-11-16 1:20 [Bug tree-optimization/46494] New: [4.3/4.4/4.5/4.6 Regression] ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-fre -ftree-vrp zsojka at seznam dot cz
2010-11-16 1:59 ` [Bug tree-optimization/46494] " hjl.tools at gmail dot com
2010-11-16 10:25 ` rguenth at gcc dot gnu.org
2010-11-22 15:05 ` jakub at gcc dot gnu.org
2010-11-25 16:06 ` rguenth at gcc dot gnu.org
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