[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
-- rguenth at gcc dot gnu dot org changed: What|Removed |Added CC||rguenth at gcc dot gnu dot ||org Keywords||wrong-code Target Milestone|--- |4.3.3 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #1 from hjl dot tools at gmail dot com 2009-01-18 17:16 --- It is caused by revision 142040: http://gcc.gnu.org/ml/gcc-cvs/2008-11/msg00541.html -- hjl dot tools at gmail dot com changed: What|Removed |Added Target Milestone|4.3.3 |--- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #2 from hjl dot tools at gmail dot com 2009-01-18 17:19 --- (In reply to comment #1) It is caused by revision 142040: http://gcc.gnu.org/ml/gcc-cvs/2008-11/msg00541.html The patch is at http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01040.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #3 from rguenther at suse dot de 2009-01-18 17:21 --- Subject: Re: [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled On Sun, 18 Jan 2009, hjl dot tools at gmail dot com wrote: --- Comment #2 from hjl dot tools at gmail dot com 2009-01-18 17:19 --- (In reply to comment #1) It is caused by revision 142040: http://gcc.gnu.org/ml/gcc-cvs/2008-11/msg00541.html The patch is at http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01040.html Can you check if it is fixed by -fno-strict-aliasing and/or --param max-fields-for-field-sensitive=0? I suspect we need to backport some PTA fixes :/ Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
-- rguenth at gcc dot gnu dot org changed: What|Removed |Added Target Milestone|--- |4.3.3 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #4 from hjl dot tools at gmail dot com 2009-01-18 17:39 --- (In reply to comment #3) Can you check if it is fixed by -fno-strict-aliasing and/or --param max-fields-for-field-sensitive=0? I suspect we need to backport some PTA fixes :/ Either -fno-strict-aliasing or --param max-fields-for-field-sensitive=0 fixed this. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #5 from rguenther at suse dot de 2009-01-18 17:42 --- Subject: Re: [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled On Sun, 18 Jan 2009, hjl dot tools at gmail dot com wrote: --- Comment #4 from hjl dot tools at gmail dot com 2009-01-18 17:39 --- (In reply to comment #3) Can you check if it is fixed by -fno-strict-aliasing and/or --param max-fields-for-field-sensitive=0? I suspect we need to backport some PTA fixes :/ Either -fno-strict-aliasing or --param max-fields-for-field-sensitive=0 fixed this. I would guess that 2008-11-25 Daniel Berlin dber...@dberlin.org Richard Guenther rguent...@suse.de PR tree-optimization/37869 * tree-ssa-structalias.c (struct constraint_graph): Remove pt_used and number_incoming members. (build_pred_graph): Do not allocate them. (condense_visit): Do not use them. (label_visit): Likewise. (free_var_substitution_info): Do not free them. might fix it, but of course a testcase would be nice to have. Thx for tracking this down btw. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #6 from hjl dot tools at gmail dot com 2009-01-18 19:09 --- (In reply to comment #5) I would guess that 2008-11-25 Daniel Berlin dber...@dberlin.org Richard Guenther rguent...@suse.de PR tree-optimization/37869 * tree-ssa-structalias.c (struct constraint_graph): Remove pt_used and number_incoming members. (build_pred_graph): Do not allocate them. (condense_visit): Do not use them. (label_visit): Likewise. (free_var_substitution_info): Do not free them. might fix it, but of course a testcase would be nice to have. Tried it on 4.3 branch. It doesn't fix the problem. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #7 from rguenth at gcc dot gnu dot org 2009-01-18 19:34 --- It works for me with -O2 -ffast-math and the openSUSE 11.1 compiler which also has this patch applied (but is based on rev. 141291). I'm trying with plain 4.3 branch now - any special configure options used? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #8 from hjl dot tools at gmail dot com 2009-01-18 19:52 --- (In reply to comment #7) It works for me with -O2 -ffast-math and the openSUSE 11.1 compiler which also has this patch applied (but is based on rev. 141291). I'm trying with plain 4.3 branch now - any special configure options used? I am using -DSPEC_CPU -DNDEBUG-O2 -ffast-math -DSPEC_CPU_LP64 on Fedora 9/x86-64 with glibc 2.8-10. I used 4.3 branch at revision 143470. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #9 from rguenth at gcc dot gnu dot org 2009-01-18 20:36 --- Created an attachment (id=17136) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17136action=view) first alias patch I can reproduce this with the plain branch. Attached is the first extra alias patch in the SUSE compiler. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #10 from rguenth at gcc dot gnu dot org 2009-01-18 20:36 --- Created an attachment (id=17137) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17137action=view) second alias patch Second alias related patch in the openSUSE compiler. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #11 from rguenth at gcc dot gnu dot org 2009-01-18 20:52 --- The testcase from PR36765 fails on the 4.3 branch. Does it fail without the patch for PR37868? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #12 from rguenth at gcc dot gnu dot org 2009-01-18 20:56 --- I'm testing the patch for PR36765 - that was a h264ref miscompile on the trunk. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|-00-00 00:00:00 |2009-01-18 20:56:55 date|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #13 from hjl dot tools at gmail dot com 2009-01-18 21:05 --- Patches in comment #9 plus comment #10 fix 464.h264ref with test input. I am running with reference input on both ia32 and x86-64. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #14 from hjl dot tools at gmail dot com 2009-01-18 21:11 --- (In reply to comment #11) The testcase from PR36765 fails on the 4.3 branch. Does it fail without the patch for PR37868? gcc.c-torture/execute/pr36765.c works with -O2 at revision 142026 and fails at revision 142040 on 4.3 branch. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
--- Comment #15 from rguenth at gcc dot gnu dot org 2009-01-18 21:22 --- I have verified that the patch for PR36765 fixes h264ref on the branch. *** This bug has been marked as a duplicate of 36765 *** -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|NEW |RESOLVED Resolution||DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905
