http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47977
--- Comment #2 from froydnj at codesourcery dot com <froydnj at codesourcery dot com> 2011-03-03 16:51:18 UTC --- On Thu, Mar 03, 2011 at 04:08:53PM +0000, m.lazzarotto at robox dot it wrote: > lwz 9,8(1) # What's the purpose ? > lwz 10,12(1) # What's the purpose ? > stw 9,8(1) # What's the purpose ? > stw 10,12(1) # What's the purpose ? These are an artifact of the lower-subreg pass; the E500 bits contain some logic to clean up spurious moves introduced by using E500 floating-point, but the lower-subreg pass stymies those bits of logic. A separate bug for a (sub-)target-specific pass to clean those artifacts up would be appropriate, but I don't think it's going to happen any time soon.
