* [Bug debug/44901] [4.6 Regression] -fcompare-debug failure for C++ i386.c
2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
@ 2010-07-10 10:53 ` amylaar at gcc dot gnu dot org
2010-07-10 12:21 ` [Bug debug/44901] [4.6 Regression] -fcompare-debug failure for tree-predcom.c rguenth at gcc dot gnu dot org
` (7 subsequent siblings)
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From: amylaar at gcc dot gnu dot org @ 2010-07-10 10:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from amylaar at gcc dot gnu dot org 2010-07-10 10:53 -------
Created an attachment (id=21174)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21174&action=view)
test case - compressed with xz
$ ./bld-20100708/gcc/xgcc -B./bld-20100708/gcc -c -fpreprocessed -g -O2
-fomit-frame-pointer -fcompare-debug -DIN_GCC -W -Wall -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror
-Wold-style-definition -Wc++-compat -fno-common treepred.c
xgcc: error: treepred.c: -fcompare-debug failure
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
2010-07-10 10:53 ` [Bug debug/44901] " amylaar at gcc dot gnu dot org
@ 2010-07-10 12:21 ` rguenth at gcc dot gnu dot org
2010-07-10 15:38 ` hjl dot tools at gmail dot com
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From: rguenth at gcc dot gnu dot org @ 2010-07-10 12:21 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.6 Regression] -fcompare- |[4.6 Regression] -fcompare-
|debug failure for C++ i386.c|debug failure for tree-
| |predcom.c
Target Milestone|--- |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
2010-07-10 10:53 ` [Bug debug/44901] " amylaar at gcc dot gnu dot org
2010-07-10 12:21 ` [Bug debug/44901] [4.6 Regression] -fcompare-debug failure for tree-predcom.c rguenth at gcc dot gnu dot org
@ 2010-07-10 15:38 ` hjl dot tools at gmail dot com
2010-07-12 10:19 ` jakub at gcc dot gnu dot org
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From: hjl dot tools at gmail dot com @ 2010-07-10 15:38 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hjl dot tools at gmail dot com 2010-07-10 15:37 -------
It is caused by revision 161862:
http://gcc.gnu.org/ml/gcc-cvs/2010-07/msg00216.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |froydnj at codesourcery dot
| |com
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-07-10 15:37:50
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
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2010-07-10 15:38 ` hjl dot tools at gmail dot com
@ 2010-07-12 10:19 ` jakub at gcc dot gnu dot org
2010-07-12 14:26 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2010-07-12 10:19 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from jakub at gcc dot gnu dot org 2010-07-12 10:19 -------
Fails even with -fno-var-tracking, so does not look VTA related.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
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2010-07-12 10:19 ` jakub at gcc dot gnu dot org
@ 2010-07-12 14:26 ` jakub at gcc dot gnu dot org
2010-07-12 14:51 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2010-07-12 14:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from jakub at gcc dot gnu dot org 2010-07-12 14:26 -------
Created an attachment (id=21183)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21183&action=view)
pr44901.i
Reduced testcase:
./xgcc -B ./ -S -m32 -fcompare-debug -O2 -fno-var-tracking /tmp/pr44901.i -w
xgcc: error: /tmp/pr44901.i: -fcompare-debug failure
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
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2010-07-12 14:26 ` jakub at gcc dot gnu dot org
@ 2010-07-12 14:51 ` jakub at gcc dot gnu dot org
2010-07-12 14:57 ` froydnj at codesourcery dot com
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From: jakub at gcc dot gnu dot org @ 2010-07-12 14:51 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from jakub at gcc dot gnu dot org 2010-07-12 14:50 -------
All the unordered removals for local_decls are obviously wrong.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
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2010-07-12 14:51 ` jakub at gcc dot gnu dot org
@ 2010-07-12 14:57 ` froydnj at codesourcery dot com
2010-07-12 15:24 ` jakub at gcc dot gnu dot org
2010-07-13 11:40 ` jakub at gcc dot gnu dot org
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From: froydnj at codesourcery dot com @ 2010-07-12 14:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from froydnj at codesourcery dot com 2010-07-12 14:56 -------
Subject: Re: [4.6 Regression] -fcompare-debug failure for
tree-predcom.c
Why are the unordered removals "obviously" wrong? And why, if they're
"obviously" wrong, does this problem only turn up with a specific
bootstrap config?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
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2010-07-12 14:57 ` froydnj at codesourcery dot com
@ 2010-07-12 15:24 ` jakub at gcc dot gnu dot org
2010-07-13 11:40 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2010-07-12 15:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jakub at gcc dot gnu dot org 2010-07-12 15:23 -------
Created an attachment (id=21185)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21185&action=view)
gcc46-pr44901.patch
Untested fix.
Expansion depends on the order of vars in cfun->local_decls, see e.g.
expand_used_vars. The removal of vars from local_decls sometimes depends on
whether compiling with -g or -g0, and the unordered removal changes the
relative ordering between vars that are going to get pseudos/memory assigned,
which means -g/-g0 affect (resp. might affect) code generation, which is
undesirable.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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2010-07-10 10:49 [Bug debug/44901] New: [4.6 Regression] -fcompare-debug failure for C++ i386.c amylaar at gcc dot gnu dot org
` (7 preceding siblings ...)
2010-07-12 15:24 ` jakub at gcc dot gnu dot org
@ 2010-07-13 11:40 ` jakub at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu dot org @ 2010-07-13 11:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from jakub at gcc dot gnu dot org 2010-07-13 07:00 -------
Subject: Bug 44901
Author: jakub
Date: Tue Jul 13 06:59:56 2010
New Revision: 162126
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162126
Log:
PR debug/44901
* vec.h (VEC_block_remove): Fix comment.
* tree-ssa-live.c (remove_unused_locals): Don't use
VEC_unordered_remove on local_decls, instead replace a single
vector element in each iteration if at least one element had
to be removed and VEC_truncate at the end.
* omp-low.c (expand_omp_taskreg): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-low.c
trunk/gcc/tree-ssa-live.c
trunk/gcc/vec.h
------- Comment #9 from jakub at gcc dot gnu dot org 2010-07-13 11:40 -------
Fixed.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44901
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