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Kenneth Zadeck <email@example.com> writes:
> i actually care about all registers, not just the hard ones. as it
> turns out i had been wrong and lower-subregs splits pseudo to pseudo
> moves, and hard reg to and from psuedo moves.
> register_move_cost requires the regclasses.
> anyway that is not the right thing to do for the shifts.
I suppose you could compare costs.
Two new target hooks is not impossible, but the information ought to be
available in other ways.