[Bug target/21389] optimized code seg faults due to double load on sparcV9

[drew dot johnson at andrew dot com]

------- Additional Comments From drew dot johnson at andrew dot com  2005-05-06 18:53 -------
(In reply to comment #0)
> 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.

This actually fails when -O1 or higher is used.  For some reason, I thought 
that -O2 was the default.


-- 


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