[Bug c/20329] New: regression: current 3.4.4 miscompiles Linux kernel with athlon optimisations

[bero at arklinux dot org]

First of all, sorry for a very vague bug report, this is hard to trace down  
and I'm short on time.  
  
Compiling a Linux kernel with athlon optimisations with current gcc 3.4.4  
snapshots results in a kernel that Oopses on bootup on most (though not all)  
Athlon machines. 
 
Optimising for i686 instead of athlon "fixes" the problem; so does reverting 
to an older gcc (including older 3.4.4 snapshots). 
 
Last known good version: 3.4.4-20050127  
First known bad version: 3.4.4-20050227

-- 
           Summary: regression: current 3.4.4 miscompiles Linux kernel with
                    athlon optimisations
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bero at arklinux dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20329