[Bug c/21389] New: optimized code seg faults due to double load on sparcV9

["drew dot johnson at andrew dot com" <gcc-bugzilla at gcc dot gnu dot org>]

When -O3 or higher is used, the optimizer utilizes the lddf sparc instruction 
to load doubles into registers.  This can generate a bus-error/seg-fault at 
runtime if the source address of the load is not mod8.  The optimizer does not 
check this, even with -munaligned-doubles set.

-- 
           Summary: optimized code seg faults due to double load on sparcV9
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: drew dot johnson at andrew dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: 3.4.2
  GCC host triplet: sparc-sun-solaris2.8
GCC target triplet: sparc-sun-solaris2.8


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21389