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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] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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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