[Bug middle-end/38905] New: [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled

["hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

On Linux/x86-64, gcc 4.3.3 revision 143474 miscompiled 464.h264ref in
SPEC CPU 2006 at -O2 -ffast-math:

  Running 464.h264ref ref base o2 default
Error with
'/export/gnu/import/svn/gcc-test/spec/2006/x86_64/spec/bin/specinvoke
rt/gnu/import/svn/gcc-test/spec/2006/x86_64/spec/benchspec/CPU2006/464.h264ref/r
ref_o2.0000 -c 1 -e compare.err -o compare.stdout -f compare.cmd': check file
'/
mport/svn/gcc-test/spec/2006/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_b
000/.err'
*** Miscompare of foreman_ref_main_leakybucketparam.cfg, see
/export/gnu/import/
/spec/2006/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.0000/fo
in_leakybucketparam.cfg.mis
*** Miscompare of foreman_ref_main_encodelog.out, see
/export/gnu/import/svn/gcc
006/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.0000/foreman_r
delog.out.mis
*** Miscompare of sss_main_encodelog.out, see
/export/gnu/import/svn/gcc-test/sp
64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.0000/sss_main_encodelo
*** Miscompare of foreman_ref_baseline_encodelog.out, see
/export/gnu/import/svn
ec/2006/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.0000/forem
ine_encodelog.out.mis
*** Miscompare of sss_main_leakybucketparam.cfg, see
/export/gnu/import/svn/gcc-
06/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.0000/sss_main_l
ram.cfg.mis
*** Miscompare of foreman_ref_baseline_leakybucketparam.cfg, see
/export/gnu/imp
test/spec/2006/x86_64/spec/benchspec/CPU2006/464.h264ref/run/run_base_ref_o2.000
f_baseline_leakybucketparam.cfg.mis

We are trying to find a smaller testcase as well as which
checkin caused this.


-- 
           Summary: [4.3 Regression]  464.h264ref in SPEC CPU 2006
                    miscompiled
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: x86-64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905