This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [Patch,AVR]: FIX ICE in optabs due to bad rotate expander.
2011/4/18 Denis Chertykov <chertykov@gmail.com>:
> 2011/4/18 Georg-Johann Lay <avr@gjlay.de>:
> Few years ago I have played with early splitting of anything possible
> (move,add,sub,and,...). The results was very bad.
> It's happened because flow of splitted insns (8bits insns) becomes
> unreadable for most of GCC optimisation passes.
> May be splitting is appropriate before register allocation or even after
> reload pass.
May be something like this (early splitting) happened with the subreg
lowering.
Denis.