https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90249
Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |wilco at gcc dot gnu.org
--- Comment #5 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #4)
> That is code *size*. Code size is expected to grow a tiny bit, because of
> *better* register allocation.
>
> But we could not do make_more_copies at -Os, if that helps? (The hard
> register
> changes themselves are required for correctness).
Better register allocation implies lower average codesize due to fewer spills,
fewer callee-saves, fewer moves etc.
I still don't understand what specific problem make_more_copies is trying to
solve. Is it trying to do life-range splitting of argument registers?
