Kenneth Zadeck 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 th
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.
kenny
Kenneth Zadeck writes:
> I think that the question is really bigger than finding the correct
> line to fix. The problem is, that this code assumes that machines do
> not have multiword moves or multiword shifts. My machine has both,
> and i assume that the avr and the neon have at least multi
wrote:
Kenneth Zadeck writes:
I have figured out what the root cause of pr52543, but i need some
advise as to how to fix it.
The bug only happens if the source or destination of the move is a
hard register. lower-subreg never breaks up pseudo to pseudo moves
that are larger than word mode
Kenneth Zadeck writes:
> I have figured out what the root cause of pr52543, but i need some
> advise as to how to fix it.
> The bug only happens if the source or destination of the move is a
> hard register. lower-subreg never breaks up pseudo to pseudo moves
> that are larger
I have figured out what the root cause of pr52543, but i need some
advise as to how to fix it.
The bug only happens if the source or destination of the move is a hard
register. lower-subreg never breaks up pseudo to pseudo moves that are
larger than word mode. According to richard sandiford
