http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43350
--- Comment #6 from davem at gcc dot gnu.org 2012-11-07 05:44:52 UTC --- That's basically what -m32 -mcpu=v9 is Jan. The compiler just isn't taking advantage of it as well as it can due to how the sparc backend is designed. We have access to 16 64-bit registers at all times. Please, drop this discussion, when I get a large block of time I'll work on improving the sparc backend in this area. This discussion is just consuming my time and making it take longer for me to get to that task. Thanks.
