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
