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* [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622
@ 2011-03-29 7:43 jakub at gcc dot gnu.org
2011-03-29 9:22 ` [Bug bootstrap/48327] " ebotcazou at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-29 7:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
Summary: [4.7 Regression] Bootstrap comparison failure with ada
since r171622
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jakub@gcc.gnu.org
CC: law@gcc.gnu.org
Target: x86_64-linux
../configure --enable-languages=all,obj-c++,ada,lto,go
--enable-checking=yes,rtl
configured gcc results in .bad_compare:
gcc/ada/exp_dist.o differs
r171621 works, r171622 fails.
Most likely stage2 tree-ssa-forwprop.o is miscompiled, doesn't seem to be
VTA related, as even when I compile exp_dist.adb with -g0 by both
stage1-gcc/gnat1 and prev-gcc/gnat1, it differs. r171621 compiled exp_dist.s
is identical to what stage1-gcc/gnat1 in r171622 produces, differences start in
forwprop1 pass.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
@ 2011-03-29 9:22 ` ebotcazou at gcc dot gnu.org
2011-03-29 10:32 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-03-29 9:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-linux |x86_64-linux x86-linux
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.03.29 07:49:51
CC| |ebotcazou at gcc dot
| |gnu.org
Version|4.6.0 |4.7.0
Ever Confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-03-29 07:49:51 UTC ---
Confirmed. Same error on x86.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
2011-03-29 9:22 ` [Bug bootstrap/48327] " ebotcazou at gcc dot gnu.org
@ 2011-03-29 10:32 ` rguenth at gcc dot gnu.org
2011-03-29 11:40 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-03-29 10:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.7.0
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
2011-03-29 9:22 ` [Bug bootstrap/48327] " ebotcazou at gcc dot gnu.org
2011-03-29 10:32 ` rguenth at gcc dot gnu.org
@ 2011-03-29 11:40 ` jakub at gcc dot gnu.org
2011-03-29 16:09 ` law at redhat dot com
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-29 11:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-29 10:56:50 UTC ---
Binary search revealed it is actually gimple.o that got miscompiled by
stage1-gcc/cc1. Ignoring .LXXXX number differences, only is_gimple_val
and canonicalize_cond_expr_cond functions are different.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2011-03-29 11:40 ` jakub at gcc dot gnu.org
@ 2011-03-29 16:09 ` law at redhat dot com
2011-03-29 23:59 ` law at gcc dot gnu.org
2011-03-30 0:11 ` law at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: law at redhat dot com @ 2011-03-29 16:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
--- Comment #3 from Jeffrey A. Law <law at redhat dot com> 2011-03-29 15:59:11 UTC ---
It's a problem with updating the SSA graph in a relatively uncommon case.
We're failing to update a PHI argument correctly. I'm still thinking about how
best to address the problem.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
` (3 preceding siblings ...)
2011-03-29 16:09 ` law at redhat dot com
@ 2011-03-29 23:59 ` law at gcc dot gnu.org
2011-03-30 0:11 ` law at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: law at gcc dot gnu.org @ 2011-03-29 23:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> 2011-03-29 22:49:07 UTC ---
Author: law
Date: Tue Mar 29 22:49:00 2011
New Revision: 171703
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171703
Log:
PR bootstrap/48327
* tree-ssa-threadupdate.c (struct redirection_data): Remove
do_not_duplicate field.
(lookup_redirection_data): Corresponding changes.
(create_duplicates): Always create a template block.
(redirect_edges): Remove code which reused the original block
when it was going to become unreachable code.
(thread_block): Don't set do_not_duplicate field.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-threadupdate.c
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug bootstrap/48327] [4.7 Regression] Bootstrap comparison failure with ada since r171622
2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
` (4 preceding siblings ...)
2011-03-29 23:59 ` law at gcc dot gnu.org
@ 2011-03-30 0:11 ` law at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: law at redhat dot com @ 2011-03-30 0:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48327
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #5 from Jeffrey A. Law <law at redhat dot com> 2011-03-29 22:56:12 UTC ---
Fixed by tree-ssa-threadupdate patch.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2011-03-29 22:56 UTC | newest]
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2011-03-29 7:43 [Bug bootstrap/48327] New: [4.7 Regression] Bootstrap comparison failure with ada since r171622 jakub at gcc dot gnu.org
2011-03-29 9:22 ` [Bug bootstrap/48327] " ebotcazou at gcc dot gnu.org
2011-03-29 10:32 ` rguenth at gcc dot gnu.org
2011-03-29 11:40 ` jakub at gcc dot gnu.org
2011-03-29 16:09 ` law at redhat dot com
2011-03-29 23:59 ` law at gcc dot gnu.org
2011-03-30 0:11 ` law at redhat dot com
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